Fix Read Modified Query from Moshix bug report

j3270/src/main/java/haus/nightmare/j3270/J3270App.java

@@ -27,6 +27,30 @@ public class J3270App extends JFrame implements ConnectionListener, ScreenUpdate
 
     private static final Logger log = Logger.getLogger(J3270App.class.getName());
 
+    // Active open windows tracking
+    private static final java.util.List<J3270App> openWindows = new java.util.concurrent.CopyOnWriteArrayList<>();
+
+    public static java.util.List<J3270App> getOpenWindows() {
+        return java.util.Collections.unmodifiableList(openWindows);
+    }
+
+    @FunctionalInterface
+    public interface ConnectChoiceHandler {
+        ConnectChoiceDialog.Choice askChoice(Window owner, String currentTarget);
+    }
+
+    private ConnectChoiceHandler connectChoiceHandler = null;
+
+    public void setConnectChoiceHandler(ConnectChoiceHandler handler) {
+        this.connectChoiceHandler = handler;
+    }
+
+    public ConnectChoiceHandler getConnectChoiceHandler() {
+        return connectChoiceHandler;
+    }
+
+    private final java.util.function.Consumer<UITheme> themeChangeListener = this::onThemeChanged;
+
     private Telnet3270Client client;
     private TerminalPanel terminalPanel;
     private StatusBar statusBar;
@@ -60,14 +84,16 @@ public class J3270App extends JFrame implements ConnectionListener, ScreenUpdate
 
     public J3270App() {
         super("j3270 — Java TN3270 Terminal Emulator");
-        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+        setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE);
         setBackground(Color.BLACK);
         AppIcon.applyTo(this);
 
+        openWindows.add(this);
+
         buildUI();
         buildMenuBar();
 
-        ThemeManager.addThemeChangeListener(this::onThemeChanged);
+        ThemeManager.addThemeChangeListener(themeChangeListener);
 
         pack();
         setLocationRelativeTo(null);
@@ -78,7 +104,7 @@ public class J3270App extends JFrame implements ConnectionListener, ScreenUpdate
             if (client != null) {
                 statusBar.updateStatus();
                 syncModeMenuItems();
-                if (!isAnyChildDialogActive() && KeyboardFocusManager.getCurrentKeyboardFocusManager().getFocusedWindow() == this) {
+                if (!isModalDialogActive() && KeyboardFocusManager.getCurrentKeyboardFocusManager().getFocusedWindow() == this) {
                     if (!terminalPanel.hasFocus()) {
                         terminalPanel.requestFocusInWindow();
                     }
@@ -87,25 +113,27 @@ public class J3270App extends JFrame implements ConnectionListener, ScreenUpdate
         });
         refreshTimer.start();
 
+        setAutoRequestFocus(true);
+
         addWindowListener(new WindowAdapter() {
             @Override
             public void windowClosing(WindowEvent e) {
-                disconnect();
-                if (refreshTimer != null)
-                    refreshTimer.stop();
-                if (printerSessionDialog != null) {
-                    printerSessionDialog.dispose();
-                }
-                if (screenHistoryDialog != null) {
-                    screenHistoryDialog.dispose();
-                }
-                terminalPanel.dispose();
+                closeWindow();
             }
 
             @Override
             public void windowActivated(WindowEvent e) {
-                if (!isAnyChildDialogActive()) {
-                    terminalPanel.requestFocusInWindow();
+                if (!isModalDialogActive() && terminalPanel != null) {
+                    terminalPanel.requestFocus();
+                }
+            }
+        });
+
+        addWindowFocusListener(new WindowAdapter() {
+            @Override
+            public void windowGainedFocus(WindowEvent e) {
+                if (!isModalDialogActive() && terminalPanel != null) {
+                    terminalPanel.requestFocus();
                 }
             }
         });
@@ -117,16 +145,20 @@ public class J3270App extends JFrame implements ConnectionListener, ScreenUpdate
                 Object src = me.getSource();
                 if (src instanceof Component) {
                     Window win = SwingUtilities.getWindowAncestor((Component) src);
-                    if (win == J3270App.this && !isAnyChildDialogActive()) {
+                    if (win == J3270App.this && !isModalDialogActive()) {
                         if (!J3270App.this.isFocused() || !J3270App.this.isActive()) {
                             J3270App.this.toFront();
-                            J3270App.this.requestFocus();
                         }
                         boolean isMenu = (src instanceof JMenuBar) || (src instanceof JMenuItem) || (src instanceof JPopupMenu)
                                 || SwingUtilities.getAncestorOfClass(JMenuBar.class, (Component) src) != null
                                 || SwingUtilities.getAncestorOfClass(JPopupMenu.class, (Component) src) != null;
                         if (!isMenu && terminalPanel != null && !terminalPanel.hasFocus()) {
-                            terminalPanel.requestFocusInWindow();
+                            terminalPanel.requestFocus();
+                            SwingUtilities.invokeLater(() -> {
+                                if (terminalPanel != null && !terminalPanel.hasFocus()) {
+                                    terminalPanel.requestFocus();
+                                }
+                            });
                         }
                     }
                 }
@@ -134,19 +166,9 @@ public class J3270App extends JFrame implements ConnectionListener, ScreenUpdate
         }, AWTEvent.MOUSE_EVENT_MASK);
     }
 
-    private boolean isAnyChildDialogActive() {
-        Window focusedWindow = KeyboardFocusManager.getCurrentKeyboardFocusManager().getFocusedWindow();
-        if (focusedWindow != null && focusedWindow != this) {
-            return true;
-        }
-        if (findDialog != null && findDialog.isVisible()) return true;
-        if (scriptDialog != null && scriptDialog.isVisible()) return true;
-        if (macroDialog != null && macroDialog.isVisible()) return true;
-        if (fieldInspectorDialog != null && fieldInspectorDialog.isVisible()) return true;
-        if (printerSessionDialog != null && printerSessionDialog.isVisible()) return true;
-        if (screenHistoryDialog != null && screenHistoryDialog.isVisible()) return true;
+    private boolean isModalDialogActive() {
         for (Window owned : getOwnedWindows()) {
-            if (owned != null && owned.isVisible()) {
+            if (owned instanceof Dialog && owned.isVisible() && ((Dialog) owned).isModal()) {
                 return true;
             }
         }
@@ -197,6 +219,8 @@ public class J3270App extends JFrame implements ConnectionListener, ScreenUpdate
         fileMenu.add(createMenuItem("Connect...", KeyEvent.VK_N, this::showConnectDialog));
         fileMenu.add(createMenuItem("Disconnect", KeyEvent.VK_D, this::disconnect));
         fileMenu.addSeparator();
+        fileMenu.add(createMenuItem("Close Window", KeyEvent.VK_W, this::closeWindow));
+        fileMenu.addSeparator();
         fileMenu.add(createMenuItem("Save Screen As...", -1, () -> ScreenExporter.showExportDialog(this, client, terminalPanel)));
         fileMenu.add(createMenuItem("3287 Printer Session...", -1, this::showPrinterSessionDialog));
         fileMenu.add(createMenuItem("Print Screen...", KeyEvent.VK_P, this::printScreen));
@@ -204,12 +228,49 @@ public class J3270App extends JFrame implements ConnectionListener, ScreenUpdate
         fileMenu.add(createMenuItem("Settings...", -1, this::showSettingsDialog));
         fileMenu.addSeparator();
         fileMenu.add(createMenuItem("Quit", KeyEvent.VK_Q, () -> {
-            disconnect();
+            for (J3270App win : new java.util.ArrayList<>(openWindows)) {
+                win.disconnect();
+                win.dispose();
+            }
             System.exit(0);
         }));
         menuBar.add(fileMenu);
 
-        // 2. Edit menu
+        // 2. Connection menu
+        JMenu connectionMenu = createMenu("Connection");
+        connectionMenu.add(createMenuItem("Connect...", KeyEvent.VK_N, this::showConnectDialog));
+        connectionMenu.add(createMenuItem("Disconnect", KeyEvent.VK_D, this::disconnect));
+        connectionMenu.addSeparator();
+
+        // Host Type Submenu (CMS/TSO/CICS)
+        JMenu hostTypeMenu = createMenu("Host Type");
+        ButtonGroup hostTypeGroup = new ButtonGroup();
+        for (haus.nightmare.lib3270j.ft.FTConfig.HostType ht : haus.nightmare.lib3270j.ft.FTConfig.HostType.values()) {
+            JRadioButtonMenuItem htItem = new JRadioButtonMenuItem(ht.name());
+            ThemeManager.styleMenuItem(htItem);
+            hostTypeGroup.add(htItem);
+            htItem.addActionListener(e -> setConnectionHostType(ht));
+            hostTypeMenu.add(htItem);
+        }
+        connectionMenu.add(hostTypeMenu);
+        connectionMenu.addSeparator();
+
+        // Saved Connections Submenu
+        JMenu savedHostsMenu = createMenu("Saved Connections");
+        connectionMenu.add(savedHostsMenu);
+
+        connectionMenu.addMenuListener(new javax.swing.event.MenuListener() {
+            @Override
+            public void menuSelected(javax.swing.event.MenuEvent e) {
+                updateConnectionMenu(hostTypeMenu, hostTypeGroup, savedHostsMenu);
+            }
+            @Override public void menuDeselected(javax.swing.event.MenuEvent e) {}
+            @Override public void menuCanceled(javax.swing.event.MenuEvent e) {}
+        });
+
+        menuBar.add(connectionMenu);
+
+        // 3. Edit menu
         JMenu editMenu = createMenu("Edit");
         editMenu.add(createMenuItem("Cut", KeyEvent.VK_X, () -> terminalPanel.cutSelection()));
         editMenu.add(createMenuItem("Copy", KeyEvent.VK_C, () -> terminalPanel.copySelection()));
@@ -738,7 +799,20 @@ public class J3270App extends JFrame implements ConnectionListener, ScreenUpdate
 
     // ========== Connection management ==========
 
-    private void showConnectDialog() {
+    public void showConnectDialog() {
+        boolean wasConnected = isConnected();
+        if (wasConnected && (!GraphicsEnvironment.isHeadless() || connectChoiceHandler != null)) {
+            ConnectChoiceDialog.Choice choice = promptConnectConflict();
+            if (choice == ConnectChoiceDialog.Choice.NEW_WINDOW) {
+                J3270App newWindow = createNewWindow(null);
+                SwingUtilities.invokeLater(newWindow::showConnectDialog);
+                return;
+            } else if (choice == ConnectChoiceDialog.Choice.CANCEL) {
+                return;
+            }
+            // choice == ABORT_CURRENT: proceed to showConnectDialog in this window
+        }
+
         ConnectDialog dialog = new ConnectDialog(this);
         String initialHost = lastHost != null && !lastHost.isEmpty() ? lastHost : haus.nightmare.j3270.config.Settings.getAutoConnectHost();
         int initialPort = lastPort > 0 ? lastPort : haus.nightmare.j3270.config.Settings.getAutoConnectPort();
@@ -748,13 +822,76 @@ public class J3270App extends JFrame implements ConnectionListener, ScreenUpdate
         dialog.setInitialVerifyCert(haus.nightmare.j3270.config.Settings.getAutoConnectVerifyCert());
         dialog.setInitialCodePage(haus.nightmare.j3270.config.Settings.getCodePage());
         dialog.setInitialGraphicsMode(haus.nightmare.j3270.config.Settings.getGraphicsMode());
+        dialog.setInitialHostType(haus.nightmare.j3270.config.Settings.getDefaultHostType());
         dialog.setVisible(true);
 
         if (dialog.isConfirmed()) {
             ConnectionConfig config = dialog.getConnectionConfig();
             lastHost = config.getHost();
             lastPort = config.getPort();
-            connect(config);
+            connect(config, !wasConnected);
+        }
+    }
+
+    public void setConnectionHostType(haus.nightmare.lib3270j.ft.FTConfig.HostType ht) {
+        if (ht == null) return;
+        haus.nightmare.j3270.config.Settings.setDefaultHostType(ht.name());
+        if (client != null && client.getConfig() != null) {
+            client.getConfig().setFtHostType(ht);
+            String profileId = client.getConfig().getSavedProfileId();
+            if (profileId != null) {
+                haus.nightmare.j3270.storage.SavedHost saved = haus.nightmare.j3270.storage.HostStorage.findById(profileId);
+                if (saved != null) {
+                    saved.setHostType(ht.name());
+                    haus.nightmare.j3270.storage.HostStorage.saveHost(saved);
+                }
+            }
+        }
+        if (FileTransferDialog.getLastTransferState() != null) {
+            FileTransferDialog.getLastTransferState().hostType = ht;
+        }
+    }
+
+    private void updateConnectionMenu(JMenu hostTypeMenu, ButtonGroup hostTypeGroup, JMenu savedHostsMenu) {
+        haus.nightmare.lib3270j.ft.FTConfig.HostType currentHt = haus.nightmare.lib3270j.ft.FTConfig.HostType.TSO;
+        if (client != null && client.getConfig() != null) {
+            currentHt = client.getConfig().getFtHostType();
+        } else {
+            String def = haus.nightmare.j3270.config.Settings.getDefaultHostType();
+            try {
+                if (def != null) currentHt = haus.nightmare.lib3270j.ft.FTConfig.HostType.valueOf(def.trim().toUpperCase());
+            } catch (Exception ignored) {}
+        }
+
+        for (int i = 0; i < hostTypeMenu.getItemCount(); i++) {
+            JMenuItem item = hostTypeMenu.getItem(i);
+            if (item instanceof JRadioButtonMenuItem) {
+                JRadioButtonMenuItem rb = (JRadioButtonMenuItem) item;
+                if (rb.getText().equalsIgnoreCase(currentHt.name())) {
+                    rb.setSelected(true);
+                }
+            }
+        }
+
+        savedHostsMenu.removeAll();
+        java.util.List<haus.nightmare.j3270.storage.SavedHost> savedList = haus.nightmare.j3270.storage.HostStorage.getSavedHosts();
+        if (savedList.isEmpty()) {
+            JMenuItem noneItem = new JMenuItem("(No Saved Connections)");
+            noneItem.setEnabled(false);
+            ThemeManager.styleMenuItem(noneItem);
+            savedHostsMenu.add(noneItem);
+        } else {
+            for (haus.nightmare.j3270.storage.SavedHost sh : savedList) {
+                String label = sh.getName();
+                if (label == null || label.trim().isEmpty()) {
+                    label = sh.getHost() + ":" + sh.getPort();
+                }
+                String ht = (sh.getHostType() != null && !sh.getHostType().trim().isEmpty()) ? sh.getHostType().trim() : "TSO";
+                JMenuItem hostItem = new JMenuItem(label + " [" + ht + "]");
+                ThemeManager.styleMenuItem(hostItem);
+                hostItem.addActionListener(ev -> connect(sh.toConnectionConfig(), true));
+                savedHostsMenu.add(hostItem);
+            }
         }
     }
 
@@ -763,6 +900,79 @@ public class J3270App extends JFrame implements ConnectionListener, ScreenUpdate
         dialog.setVisible(true);
     }
 
+    public void closeWindow() {
+        disconnect();
+        if (refreshTimer != null) {
+            refreshTimer.stop();
+        }
+        if (printerSessionDialog != null) {
+            printerSessionDialog.dispose();
+        }
+        if (screenHistoryDialog != null) {
+            screenHistoryDialog.dispose();
+        }
+        terminalPanel.dispose();
+        ThemeManager.removeThemeChangeListener(themeChangeListener);
+        openWindows.remove(this);
+        dispose();
+        if (openWindows.isEmpty() && !GraphicsEnvironment.isHeadless()) {
+            System.exit(0);
+        }
+    }
+
+    @Override
+    public void dispose() {
+        openWindows.remove(this);
+        ThemeManager.removeThemeChangeListener(themeChangeListener);
+        super.dispose();
+    }
+
+    public boolean isConnected() {
+        return client != null && (client.isConnected() ||
+                (client.getConnectionState() != null && client.getConnectionState().isConnected()));
+    }
+
+    public String getConnectedTarget() {
+        if (client != null && client.getConfig() != null) {
+            String profileName = client.getConfig().getSavedProfileName();
+            String host = client.getConfig().getHost();
+            int port = client.getConfig().getPort();
+            if (profileName != null && !profileName.trim().isEmpty()) {
+                return profileName + " (" + host + ":" + port + ")";
+            }
+            if (host != null && !host.trim().isEmpty()) {
+                return host + ":" + port;
+            }
+        }
+        if (lastHost != null && !lastHost.trim().isEmpty()) {
+            return lastHost + ":" + lastPort;
+        }
+        return "the current host";
+    }
+
+    public J3270App createNewWindow(ConnectionConfig config) {
+        J3270App newApp = new J3270App();
+        try {
+            Point loc = getLocation();
+            newApp.setLocation(loc.x + 30, loc.y + 30);
+        } catch (Exception ignored) {}
+        newApp.setVisible(true);
+        if (config != null) {
+            newApp.connect(config, false);
+        }
+        return newApp;
+    }
+
+    public ConnectChoiceDialog.Choice promptConnectConflict() {
+        if (connectChoiceHandler != null) {
+            return connectChoiceHandler.askChoice(this, getConnectedTarget());
+        }
+        if (GraphicsEnvironment.isHeadless()) {
+            return ConnectChoiceDialog.Choice.ABORT_CURRENT;
+        }
+        return ConnectChoiceDialog.showPrompt(this, getConnectedTarget());
+    }
+
     public TerminalPanel getTerminalPanel() {
         return terminalPanel;
     }
@@ -775,7 +985,22 @@ public class J3270App extends JFrame implements ConnectionListener, ScreenUpdate
         return statusBar;
     }
 
-    void connect(ConnectionConfig config) {
+    public void connect(ConnectionConfig config) {
+        connect(config, true);
+    }
+
+    public void connect(ConnectionConfig config, boolean promptIfConnected) {
+        if (promptIfConnected && isConnected() && (!GraphicsEnvironment.isHeadless() || connectChoiceHandler != null)) {
+            ConnectChoiceDialog.Choice choice = promptConnectConflict();
+            if (choice == ConnectChoiceDialog.Choice.NEW_WINDOW) {
+                createNewWindow(config);
+                return;
+            } else if (choice == ConnectChoiceDialog.Choice.CANCEL) {
+                return;
+            }
+            // choice == ABORT_CURRENT: proceed to connect in this window
+        }
+
         lastHost = config.getHost();
         lastPort = config.getPort();
 
@@ -784,11 +1009,29 @@ public class J3270App extends JFrame implements ConnectionListener, ScreenUpdate
         haus.nightmare.j3270.config.Settings.setAutoConnectTls(config.isUseTls());
         haus.nightmare.j3270.config.Settings.setAutoConnectVerifyCert(config.isTlsVerifyCert());
         haus.nightmare.j3270.config.Settings.setCodePage(config.getCodePage());
+        if (config.getHostType() != null) {
+            haus.nightmare.j3270.config.Settings.setDefaultHostType(config.getHostType());
+        }
+        if (FileTransferDialog.getLastTransferState() != null && config.isSavedConnection()) {
+            FileTransferDialog.getLastTransferState().hostType = config.getFtHostType();
+        }
         if (config.getGraphicsMode() != null) {
             haus.nightmare.j3270.config.Settings.setGraphicsMode(config.getGraphicsMode());
         }
 
-        disconnect();
+        Telnet3270Client oldClient = client;
+        if (oldClient != null) {
+            if (fileTransfer != null) {
+                fileTransfer.cancel();
+                fileTransfer = null;
+            }
+            if (macroDialog != null) {
+                macroDialog.stopMacro();
+            }
+            oldClient.removeConnectionListener(this);
+            oldClient.removeScreenUpdateListener(this);
+            client = null;
+        }
 
         if (config.getCertificateVerifier() == null) {
             config.setCertificateVerifier((chain, authType, exception) ->
@@ -806,10 +1049,27 @@ public class J3270App extends JFrame implements ConnectionListener, ScreenUpdate
         String tlsIndicator = config.isUseTls() ? (config.isTlsVerifyCert() ? " [TLS]" : " [TLS/Unverified]") : "";
         setTitle("j3270 — " + config.getHost() + ":" + config.getPort() + tlsIndicator);
 
-        terminalPanel.guardedPack();
+        int targetRows = 24;
+        int targetCols = 80;
+        TerminalModel model = config.getModel();
+        if (model != null) {
+            if (model.isDynamic()) {
+                targetRows = config.getDynamicRows();
+                targetCols = config.getDynamicCols();
+            } else {
+                targetRows = model.getAlternateRows();
+                targetCols = model.getAlternateCols();
+            }
+        }
+        terminalPanel.packForModel(targetRows, targetCols);
 
         new Thread(() -> {
             try {
+                if (oldClient != null) {
+                    try {
+                        oldClient.disconnect(1000);
+                    } catch (Exception ignored) {}
+                }
                 client.connect();
             } catch (IOException e) {
                 log.log(Level.WARNING, "Connection failed", e);
@@ -824,7 +1084,11 @@ public class J3270App extends JFrame implements ConnectionListener, ScreenUpdate
         terminalPanel.requestFocusInWindow();
     }
 
-    private void disconnect() {
+    public void disconnect() {
+        disconnect(true);
+    }
+
+    public void disconnect(boolean resetUi) {
         if (client != null) {
             if (fileTransfer != null) {
                 fileTransfer.cancel();
@@ -835,12 +1099,16 @@ public class J3270App extends JFrame implements ConnectionListener, ScreenUpdate
             }
             Telnet3270Client c = client;
             client = null;
+            c.removeConnectionListener(this);
+            c.removeScreenUpdateListener(this);
+
             new Thread(() -> {
                 try {
-                    c.disconnect();
+                    c.disconnect(1000);
                 } catch (Exception ignored) {}
             }, "Disconnect-Thread").start();
 
+            if (resetUi) {
                 Runnable uiReset = () -> {
                     terminalPanel.setClient(null);
                     statusBar.setClient(null, terminalPanel);
@@ -855,6 +1123,7 @@ public class J3270App extends JFrame implements ConnectionListener, ScreenUpdate
                 }
             }
         }
+    }
 
     private void adjustFontSize(int delta) {
         int current = terminalPanel.getFontSize();
@@ -903,7 +1172,8 @@ public class J3270App extends JFrame implements ConnectionListener, ScreenUpdate
                 String dev = (client != null && client.getTelnetFSM() != null && client.getTelnetFSM().getConnectedLu() != null) ?
                         " [" + client.getTelnetFSM().getConnectedLu() + "]" : "";
                 setTitle("j3270 — " + lastHost + ":" + lastPort + tlsIndicator + dev);
-                terminalPanel.guardedPack();
+                terminalPanel.revalidate();
+                terminalPanel.repaint();
                 terminalPanel.requestFocusInWindow();
             }
         });
@@ -954,7 +1224,8 @@ public class J3270App extends JFrame implements ConnectionListener, ScreenUpdate
     @Override
     public void onScreenSizeChanged(int rows, int cols) {
         SwingUtilities.invokeLater(() -> {
-            terminalPanel.guardedPack();
+            terminalPanel.revalidate();
+            terminalPanel.repaint();
             statusBar.updateStatus();
         });
     }
@@ -1182,6 +1453,7 @@ public class J3270App extends JFrame implements ConnectionListener, ScreenUpdate
         String configFile = null;
         String cliProxyUrl = null;
         String cliProfileName = null;
+        String cliHostType = null;
 
         java.util.List<String> remainingArgs = new java.util.ArrayList<>();
         for (int i = 0; i < args.length; i++) {
@@ -1200,6 +1472,10 @@ public class J3270App extends JFrame implements ConnectionListener, ScreenUpdate
                 cliAutoSysUnlock = true;
             } else if ("--no-auto-sys-unlock".equals(arg)) {
                 cliAutoSysUnlock = false;
+            } else if (arg.startsWith("--host-type=")) {
+                cliHostType = arg.substring(12).trim().toUpperCase();
+            } else if (("--host-type".equals(arg) || "-ht".equals(arg)) && i + 1 < args.length && !args[i + 1].startsWith("-")) {
+                cliHostType = args[++i].trim().toUpperCase();
             } else if (arg.startsWith("--graphics=")) {
                 cliGraphicsMode = GraphicsMode.fromString(arg.substring(11));
             } else if (("--graphics".equals(arg) || "-g".equals(arg)) && i + 1 < args.length && !args[i + 1].startsWith("-")) {
@@ -1254,6 +1530,7 @@ public class J3270App extends JFrame implements ConnectionListener, ScreenUpdate
         final GraphicsMode finalGraphicsMode = cliGraphicsMode;
         final String finalProxyUrl = cliProxyUrl;
         final String finalProfileName = cliProfileName;
+        final String finalHostType = cliHostType;
 
         SwingUtilities.invokeLater(() -> {
             J3270App app = new J3270App();
@@ -1266,6 +1543,7 @@ public class J3270App extends JFrame implements ConnectionListener, ScreenUpdate
                 }
                 if (profile != null) {
                     ConnectionConfig config = profile.toConnectionConfig();
+                    if (finalHostType != null) config.setHostType(finalHostType);
                     if (finalTls) config.setUseTls(true);
                     if (finalNoVerify) config.setTlsVerifyCert(false);
                     if (finalTn3270e != null) config.setTn3270eEnabled(finalTn3270e);
@@ -1322,6 +1600,11 @@ public class J3270App extends JFrame implements ConnectionListener, ScreenUpdate
                 if (finalProxyUrl != null) {
                     applyProxyUrl(config, finalProxyUrl);
                 }
+                if (finalHostType != null) {
+                    config.setHostType(finalHostType);
+                } else {
+                    config.setHostType(haus.nightmare.j3270.config.Settings.getDefaultHostType());
+                }
                 app.connect(config);
             } else {
                 haus.nightmare.j3270.config.Settings.StartupBehavior behavior = haus.nightmare.j3270.config.Settings
@@ -1334,6 +1617,7 @@ public class J3270App extends JFrame implements ConnectionListener, ScreenUpdate
                         haus.nightmare.j3270.storage.SavedHost autoHost = haus.nightmare.j3270.storage.HostStorage.getAutoConnectHost();
                         if (autoHost != null) {
                             ConnectionConfig config = autoHost.toConnectionConfig();
+                            if (finalHostType != null) config.setHostType(finalHostType);
                             if (finalTls) config.setUseTls(true);
                             if (finalNoVerify) config.setTlsVerifyCert(false);
                             if (finalTn3270e != null) config.setTn3270eEnabled(finalTn3270e);
@@ -1362,6 +1646,11 @@ public class J3270App extends JFrame implements ConnectionListener, ScreenUpdate
                                 if (finalProxyUrl != null) {
                                     applyProxyUrl(config, finalProxyUrl);
                                 }
+                                if (finalHostType != null) {
+                                    config.setHostType(finalHostType);
+                                } else {
+                                    config.setHostType(haus.nightmare.j3270.config.Settings.getDefaultHostType());
+                                }
                                 app.connect(config);
                             } else {
                                 SwingUtilities.invokeLater(app::showConnectDialog);

j3270/src/main/java/haus/nightmare/j3270/config/Settings.java

@@ -163,6 +163,15 @@ public class Settings {
         return getAutoConnectAutoReconnect();
     }
 
+    public static String getDefaultHostType() {
+        return prefs.get("defaultHostType", "TSO");
+    }
+
+    public static void setDefaultHostType(String hostType) {
+        prefs.put("defaultHostType", (hostType != null && !hostType.trim().isEmpty()) ? hostType.trim().toUpperCase() : "TSO");
+        flushPrefs();
+    }
+
     public static void setAutoReconnect(boolean autoReconnect) {
         setAutoConnectAutoReconnect(autoReconnect);
     }
@@ -738,6 +747,11 @@ public class Settings {
                     case "dynamic_cols":
                         setDynamicCols(Integer.parseInt(value));
                         break;
+                    case "hostType":
+                    case "hosttype":
+                    case "host_type":
+                        setDefaultHostType(value);
+                        break;
                     case "blockSelectMode": setBlockSelectMode(Boolean.parseBoolean(value)); break;
                     case "blockPaste": setBlockPaste(Boolean.parseBoolean(value)); break;
                     case "autoReconnect":
@@ -945,6 +959,7 @@ public class Settings {
                 w.println("autoConnectTn3270e = " + getAutoConnectTn3270e());
             }
             w.println("codePage = " + getCodePage());
+            w.println("hostType = " + getDefaultHostType());
             w.println("dynamicRows = " + getDynamicRows());
             w.println("dynamicCols = " + getDynamicCols());
             w.println("blockSelectMode = " + getBlockSelectMode());

j3270/src/main/java/haus/nightmare/j3270/ft/FileTransferDialog.java

@@ -5,6 +5,7 @@ import haus.nightmare.j3270.ui.HostDirectoryDialog;
 import haus.nightmare.j3270.ui.ThemeManager;
 import haus.nightmare.lib3270j.ft.FTConfig;
 import haus.nightmare.lib3270j.ft.FTConstants;
+import haus.nightmare.lib3270j.ft.dir.HostDirectoryEntry;
 
 import javax.swing.*;
 import javax.swing.border.EmptyBorder;
@@ -28,6 +29,8 @@ public class FileTransferDialog extends JDialog {
         public String lrecl = "";
         public String blksize = "";
         public String space = "";
+        public FTConfig.AllocationUnit units = FTConfig.AllocationUnit.TRACKS;
+        public String dirBlocks = "";
         public String options = "";
     }
 
@@ -82,6 +85,8 @@ public class FileTransferDialog extends JDialog {
     private JTextField lreclField;
     private JTextField blksizeField;
     private JTextField spaceField;
+    private JComboBox<FTConfig.AllocationUnit> unitsCombo;
+    private JTextField dirField;
 
     // VM specific
     private JTextField optionsField;
@@ -220,7 +225,7 @@ public class FileTransferDialog extends JDialog {
         formPanel.add(createRow("File Options:", optionsPanel2));
 
         // Host-specific options panel (TSO dataset allocation)
-        JPanel hostOptsPanel = new JPanel(new GridLayout(2, 4, 5, 5));
+        JPanel hostOptsPanel = new JPanel(new GridLayout(3, 4, 5, 5));
         hostOptsPanel.setOpaque(false);
         hostOptsPanel.setBorder(ThemeManager.createTitledBorder("TSO Allocation Options (Send Only)"));
 
@@ -236,10 +241,24 @@ public class FileTransferDialog extends JDialog {
         blksizeField = new JTextField(5);
         hostOptsPanel.add(blksizeField);
 
-        hostOptsPanel.add(new JLabel("SPACE:"));
+        hostOptsPanel.add(new JLabel("Units:"));
+        unitsCombo = new JComboBox<>(new FTConfig.AllocationUnit[]{
+                FTConfig.AllocationUnit.TRACKS,
+                FTConfig.AllocationUnit.CYLINDERS,
+                FTConfig.AllocationUnit.AVBLOCK,
+                FTConfig.AllocationUnit.DEFAULT
+        });
+        unitsCombo.setSelectedItem(FTConfig.AllocationUnit.TRACKS);
+        hostOptsPanel.add(unitsCombo);
+
+        hostOptsPanel.add(new JLabel("SPACE (Pri,Sec):"));
         spaceField = new JTextField(15);
         hostOptsPanel.add(spaceField);
 
+        hostOptsPanel.add(new JLabel("Directory (PDS):"));
+        dirField = new JTextField(5);
+        hostOptsPanel.add(dirField);
+
         formPanel.add(Box.createRigidArea(new Dimension(0, 10)));
         formPanel.add(hostOptsPanel);
 
@@ -306,9 +325,25 @@ public class FileTransferDialog extends JDialog {
             if (lastTransferState.recfm != null) recfmField.setText(lastTransferState.recfm);
             if (lastTransferState.lrecl != null) lreclField.setText(lastTransferState.lrecl);
             if (lastTransferState.blksize != null) blksizeField.setText(lastTransferState.blksize);
+            if (lastTransferState.units != null) unitsCombo.setSelectedItem(lastTransferState.units);
             if (lastTransferState.space != null) spaceField.setText(lastTransferState.space);
+            if (lastTransferState.dirBlocks != null) dirField.setText(lastTransferState.dirBlocks);
             if (lastTransferState.options != null) optionsField.setText(lastTransferState.options);
         }
+
+        // When using a saved connection (or when no previous transfer state exists for this connection),
+        // use the configured host type (CMS/TSO/CICS) for File Transfers
+        if (coordinator != null && coordinator.getClient() != null) {
+            haus.nightmare.lib3270j.ConnectionConfig cfg = coordinator.getClient().getConfig();
+            if (cfg != null) {
+                FTConfig.HostType configuredType = cfg.getFtHostType();
+                if (configuredType != null) {
+                    if (cfg.isSavedConnection() || lastTransferState == null) {
+                        hostTypeCombo.setSelectedItem(configuredType);
+                    }
+                }
+            }
+        }
     }
 
     private void updateOptionStates() {
@@ -327,7 +362,9 @@ public class FileTransferDialog extends JDialog {
         recfmField.setEnabled(isSend && isTso);
         lreclField.setEnabled(isSend && isTso);
         blksizeField.setEnabled(isSend && isTso);
+        unitsCombo.setEnabled(isSend && isTso);
         spaceField.setEnabled(isSend && isTso);
+        dirField.setEnabled(isSend && isTso);
         optionsField.setEnabled(isCms);
     }
 
@@ -359,11 +396,26 @@ public class FileTransferDialog extends JDialog {
     private void browseHostDirectory() {
         FTConfig.HostType hostType = (FTConfig.HostType) hostTypeCombo.getSelectedItem();
         String initialQuery = hostFileField.getText().trim();
+        if (hostType == FTConfig.HostType.CMS && (initialQuery.isEmpty() || initialQuery.equals("* * *") || initialQuery.equals("*"))) {
+            initialQuery = "* * A";
+        }
         HostDirectoryDialog dialog = new HostDirectoryDialog(this, coordinator.getClient(), hostType, initialQuery);
         dialog.setVisible(true);
 
         if (dialog.isConfirmed() && dialog.getSelectedHostFile() != null) {
             hostFileField.setText(dialog.getSelectedHostFile());
+            HostDirectoryEntry entry = dialog.getSelectedEntry();
+            if (entry != null) {
+                if (entry.getRecfm() != null && !entry.getRecfm().trim().isEmpty()) {
+                    recfmField.setText(entry.getRecfm().trim());
+                }
+                if (entry.getLrecl() > 0) {
+                    lreclField.setText(String.valueOf(entry.getLrecl()));
+                }
+                if (entry.getBlksize() > 0) {
+                    blksizeField.setText(String.valueOf(entry.getBlksize()));
+                }
+            }
             boolean shouldAutofill = localFileField.getText().trim().isEmpty() ||
                     (lastTransferState != null && localFileField.getText().trim().equals(lastTransferState.localFile));
             if (shouldAutofill) {
@@ -410,7 +462,10 @@ public class FileTransferDialog extends JDialog {
         config.setRecfm(recfmField.getText().trim());
         config.setLrecl(lreclField.getText().trim());
         config.setBlksize(blksizeField.getText().trim());
+        FTConfig.AllocationUnit selectedUnits = (FTConfig.AllocationUnit) unitsCombo.getSelectedItem();
+        config.setUnits(selectedUnits != null ? selectedUnits : FTConfig.AllocationUnit.DEFAULT);
         config.setSpace(spaceField.getText().trim());
+        config.setDirectoryBlocks(dirField.getText().trim());
         config.setOptions(optionsField.getText().trim());
 
         recordSessionTransfer();
@@ -439,7 +494,9 @@ public class FileTransferDialog extends JDialog {
         state.recfm = recfmField.getText().trim();
         state.lrecl = lreclField.getText().trim();
         state.blksize = blksizeField.getText().trim();
+        state.units = (FTConfig.AllocationUnit) unitsCombo.getSelectedItem();
         state.space = spaceField.getText().trim();
+        state.dirBlocks = dirField.getText().trim();
         state.options = optionsField.getText().trim();
         lastTransferState = state;
     }
@@ -459,7 +516,9 @@ public class FileTransferDialog extends JDialog {
     public JTextField getRecfmField() { return recfmField; }
     public JTextField getLreclField() { return lreclField; }
     public JTextField getBlksizeField() { return blksizeField; }
+    public JComboBox<FTConfig.AllocationUnit> getUnitsCombo() { return unitsCombo; }
     public JTextField getSpaceField() { return spaceField; }
+    public JTextField getDirField() { return dirField; }
     public JTextField getOptionsField() { return optionsField; }
 
     private void applyTheme(Container container) {

j3270/src/main/java/haus/nightmare/j3270/storage/HostStorage.java

@@ -1,5 +1,6 @@
 package haus.nightmare.j3270.storage;
 
+import java.io.*;
 import java.util.*;
 import java.util.logging.Level;
 import java.util.logging.Logger;
@@ -109,6 +110,267 @@ public class HostStorage {
         }
     }
 
+    // ================= INI File Export / Import =================
+
+    /**
+     * Export all currently saved host connections to an INI file.
+     */
+    public static synchronized void exportToIniFile(File file) throws IOException {
+        List<SavedHost> hosts = getSavedHosts();
+        exportToIniFile(file, hosts);
+    }
+
+    public static synchronized void exportToIniFile(String path) throws IOException {
+        exportToIniFile(new File(path));
+    }
+
+    /**
+     * Export a specified list of host connections to an INI file.
+     */
+    public static void exportToIniFile(File file, List<SavedHost> hosts) throws IOException {
+        if (file == null) {
+            throw new IllegalArgumentException("Target file cannot be null");
+        }
+        File parent = file.getParentFile();
+        if (parent != null && !parent.exists()) {
+            parent.mkdirs();
+        }
+        try (PrintWriter w = new PrintWriter(new BufferedWriter(new FileWriter(file)))) {
+            w.println("; j3270 Saved Connections Configuration File");
+            w.println("; Exported on " + new java.text.SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(new java.util.Date()));
+            w.println("; Connections count: " + (hosts != null ? hosts.size() : 0));
+            w.println();
+
+            if (hosts != null) {
+                for (SavedHost h : hosts) {
+                    String section = (h.getName() != null && !h.getName().trim().isEmpty())
+                            ? h.getName().trim()
+                            : (h.getHost() != null && !h.getHost().trim().isEmpty() ? h.getHost().trim() : "Connection");
+                    w.println("[" + section + "]");
+                    if (h.getId() != null && !h.getId().trim().isEmpty()) {
+                        w.println("id = " + h.getId());
+                    }
+                    w.println("name = " + (h.getName() != null ? h.getName() : ""));
+                    w.println("host = " + (h.getHost() != null ? h.getHost() : ""));
+                    w.println("port = " + h.getPort());
+                    w.println("model = " + h.getModel());
+                    w.println("dynamicRows = " + h.getDynamicRows());
+                    w.println("dynamicCols = " + h.getDynamicCols());
+                    w.println("luName = " + (h.getLuName() != null ? h.getLuName() : ""));
+                    w.println("autoConnect = " + h.isAutoConnect());
+                    w.println("hostType = " + (h.getHostType() != null ? h.getHostType() : "TSO"));
+                    w.println("useTls = " + h.isUseTls());
+                    w.println("tlsVerifyCert = " + h.isTlsVerifyCert());
+                    w.println("tn3270e = " + h.isTn3270e());
+                    w.println("graphicsMode = " + (h.getGraphicsMode() != null ? h.getGraphicsMode() : "BOTH"));
+                    w.println("codePage = " + (h.getCodePage() != null ? h.getCodePage() : "037"));
+                    w.println("proxyType = " + (h.getProxyType() != null ? h.getProxyType() : "NONE"));
+                    w.println("proxyHost = " + (h.getProxyHost() != null ? h.getProxyHost() : ""));
+                    w.println("proxyPort = " + h.getProxyPort());
+                    w.println("proxyUsername = " + (h.getProxyUsername() != null ? h.getProxyUsername() : ""));
+                    w.println("proxyPassword = " + (h.getProxyPassword() != null ? h.getProxyPassword() : ""));
+                    w.println();
+                }
+            }
+        }
+        log.info("Saved connections exported to: " + file.getAbsolutePath());
+    }
+
+    /**
+     * Load connections from an INI file without saving them to persistent storage.
+     */
+    public static List<SavedHost> loadFromIniFile(File file) throws IOException {
+        if (file == null || !file.exists()) {
+            throw new FileNotFoundException("Connections file not found: " + (file != null ? file.getAbsolutePath() : "null"));
+        }
+        List<SavedHost> hosts = new ArrayList<>();
+        try (BufferedReader reader = new BufferedReader(new FileReader(file))) {
+            String line;
+            SavedHost current = null;
+            while ((line = reader.readLine()) != null) {
+                line = line.trim();
+                if (line.isEmpty() || line.startsWith(";") || line.startsWith("#")) {
+                    continue;
+                }
+                if (line.startsWith("[") && line.endsWith("]")) {
+                    if (current != null) {
+                        hosts.add(current);
+                    }
+                    String section = line.substring(1, line.length() - 1).trim();
+                    if (section.toLowerCase().startsWith("connection:")) {
+                        section = section.substring("connection:".length()).trim();
+                    } else if (section.toLowerCase().startsWith("host:")) {
+                        section = section.substring("host:".length()).trim();
+                    }
+                    current = new SavedHost();
+                    current.setName(section);
+                    continue;
+                }
+                int eq = line.indexOf('=');
+                if (eq < 0) {
+                    continue;
+                }
+                String key = line.substring(0, eq).trim();
+                String value = line.substring(eq + 1).trim();
+                if (current == null) {
+                    current = new SavedHost();
+                    current.setName("Default");
+                }
+                applyIniEntry(current, key, value);
+            }
+            if (current != null) {
+                hosts.add(current);
+            }
+        }
+        return hosts;
+    }
+
+    public static List<SavedHost> loadFromIniFile(String path) throws IOException {
+        return loadFromIniFile(new File(path));
+    }
+
+    /**
+     * Import connections from an INI file and merge them into persistent storage.
+     * Updates existing profiles matching by ID or Name, and appends new profiles.
+     */
+    public static synchronized List<SavedHost> importFromIniFile(File file) throws IOException {
+        List<SavedHost> imported = loadFromIniFile(file);
+        if (imported == null || imported.isEmpty()) {
+            return getSavedHosts();
+        }
+        List<SavedHost> current = new ArrayList<>(getSavedHosts());
+        for (SavedHost host : imported) {
+            int index = -1;
+            for (int i = 0; i < current.size(); i++) {
+                SavedHost existing = current.get(i);
+                if ((host.getId() != null && !host.getId().trim().isEmpty() && Objects.equals(existing.getId(), host.getId())) ||
+                    (host.getName() != null && !host.getName().trim().isEmpty() &&
+                     host.getName().equalsIgnoreCase(existing.getName()))) {
+                    index = i;
+                    break;
+                }
+            }
+            if (host.isAutoConnect()) {
+                for (SavedHost c : current) {
+                    c.setAutoConnect(false);
+                }
+            }
+            if (index >= 0) {
+                if (host.getId() == null || host.getId().trim().isEmpty()) {
+                    host.setId(current.get(index).getId());
+                }
+                current.set(index, host);
+            } else {
+                current.add(host);
+            }
+        }
+        saveAll(current);
+        return current;
+    }
+
+    public static synchronized List<SavedHost> importFromIniFile(String path) throws IOException {
+        return importFromIniFile(new File(path));
+    }
+
+    private static void applyIniEntry(SavedHost h, String key, String value) {
+        String lowerKey = key.toLowerCase();
+        switch (lowerKey) {
+            case "id":
+                if (!value.isEmpty()) h.setId(value);
+                break;
+            case "name":
+            case "profilename":
+            case "profile":
+                if (!value.isEmpty()) h.setName(value);
+                break;
+            case "host":
+            case "hostname":
+            case "address":
+                h.setHost(value);
+                break;
+            case "port":
+                h.setPort(parseInt(value, 23));
+                break;
+            case "model":
+            case "terminalmodel":
+                h.setModel(parseInt(value, 4));
+                break;
+            case "dynamicrows":
+            case "dynamic_rows":
+            case "rows":
+                h.setDynamicRows(parseInt(value, 62));
+                break;
+            case "dynamiccols":
+            case "dynamic_cols":
+            case "cols":
+                h.setDynamicCols(parseInt(value, 160));
+                break;
+            case "luname":
+            case "lu_name":
+            case "lu":
+                h.setLuName(value);
+                break;
+            case "autoconnect":
+            case "auto_connect":
+                h.setAutoConnect(Boolean.parseBoolean(value));
+                break;
+            case "hosttype":
+            case "host_type":
+            case "type":
+                h.setHostType(value.toUpperCase());
+                break;
+            case "usetls":
+            case "use_tls":
+            case "tls":
+            case "ssl":
+                h.setUseTls(Boolean.parseBoolean(value));
+                break;
+            case "tlsverifycert":
+            case "verifycert":
+            case "tls_verify_cert":
+                h.setTlsVerifyCert(Boolean.parseBoolean(value));
+                break;
+            case "tn3270e":
+            case "enabletn3270e":
+                h.setTn3270e(Boolean.parseBoolean(value));
+                break;
+            case "graphicsmode":
+            case "graphics_mode":
+            case "graphics":
+                h.setGraphicsMode(value.toUpperCase());
+                break;
+            case "codepage":
+            case "code_page":
+            case "charset":
+                h.setCodePage(value);
+                break;
+            case "proxytype":
+            case "proxy_type":
+                h.setProxyType(value.toUpperCase());
+                break;
+            case "proxyhost":
+            case "proxy_host":
+                h.setProxyHost(value);
+                break;
+            case "proxyport":
+            case "proxy_port":
+                h.setProxyPort(parseInt(value, 0));
+                break;
+            case "proxyusername":
+            case "proxy_username":
+            case "proxyuser":
+                h.setProxyUsername(value);
+                break;
+            case "proxypassword":
+            case "proxy_password":
+            case "proxypass":
+                h.setProxyPassword(value);
+                break;
+            default:
+                break;
+        }
+    }
+
     // ================= JSON Serialization =================
 
     public static String serializeHostsJson(List<SavedHost> hosts) {

j3270/src/main/java/haus/nightmare/j3270/storage/SavedHost.java

@@ -108,6 +108,10 @@ public class SavedHost {
         }
 
         ConnectionConfig config = new ConnectionConfig(host, port, tm, useTls);
+        config.setSavedConnection(true);
+        config.setSavedProfileId(this.id);
+        config.setSavedProfileName(this.name);
+        config.setHostType(this.hostType != null ? this.hostType : "TSO");
         if (model == 0 || tm.isDynamic()) {
             config.setDynamicDimensions(dynamicRows, dynamicCols);
         }

j3270/src/main/java/haus/nightmare/j3270/ui/ConnectChoiceDialog.java

@@ -0,0 +1,146 @@
+package haus.nightmare.j3270.ui;
+
+import javax.swing.*;
+import javax.swing.border.EmptyBorder;
+import java.awt.*;
+import java.awt.event.KeyEvent;
+
+/**
+ * Dialogue shown when a connection is initiated while j3270 is already connected.
+ * Asks the user whether the connection should be opened in a new window or
+ * if the current connection should be aborted.
+ */
+public class ConnectChoiceDialog extends JDialog {
+
+    public enum Choice {
+        NEW_WINDOW,
+        ABORT_CURRENT,
+        CANCEL
+    }
+
+    private Choice result = Choice.CANCEL;
+    private final JButton newWindowBtn;
+    private final JButton abortBtn;
+    private final JButton cancelBtn;
+    private final JLabel titleLabel;
+    private final JLabel line1;
+    private final JLabel line2;
+
+    public ConnectChoiceDialog(Window owner, String currentTarget) {
+        super(owner, "Active Connection", ModalityType.APPLICATION_MODAL);
+        setDefaultCloseOperation(DISPOSE_ON_CLOSE);
+        setResizable(false);
+
+        JPanel mainPanel = new JPanel(new BorderLayout(16, 16));
+        mainPanel.setBorder(new EmptyBorder(20, 24, 20, 24));
+
+        // Message Panel
+        JPanel messagePanel = new JPanel();
+        messagePanel.setLayout(new BoxLayout(messagePanel, BoxLayout.Y_AXIS));
+        messagePanel.setOpaque(false);
+
+        titleLabel = new JLabel("Connection Already Active");
+        titleLabel.setFont(ThemeManager.getUiFont(Font.BOLD, 2));
+        messagePanel.add(titleLabel);
+        messagePanel.add(Box.createVerticalStrut(10));
+
+        String targetText = (currentTarget != null && !currentTarget.trim().isEmpty())
+                ? currentTarget.trim()
+                : "the host";
+        line1 = new JLabel("j3270 is currently connected to " + targetText + ".");
+        line1.setFont(ThemeManager.getUiFont(Font.PLAIN, 0));
+        messagePanel.add(line1);
+
+        messagePanel.add(Box.createVerticalStrut(6));
+        line2 = new JLabel("Would you like to open the connection in a new window or abort the current connection?");
+        line2.setFont(ThemeManager.getUiFont(Font.PLAIN, 0));
+        messagePanel.add(line2);
+
+        mainPanel.add(messagePanel, BorderLayout.CENTER);
+
+        // Buttons
+        JPanel buttonPanel = new JPanel(new FlowLayout(FlowLayout.RIGHT, 10, 0));
+        buttonPanel.setOpaque(false);
+
+        cancelBtn = new JButton("Cancel");
+        ThemeManager.styleButton(cancelBtn, ThemeManager.ButtonVariant.CANCEL);
+        cancelBtn.setFont(ThemeManager.getUiFont(Font.PLAIN, 0));
+        cancelBtn.addActionListener(e -> {
+            result = Choice.CANCEL;
+            dispose();
+        });
+
+        abortBtn = new JButton("Abort Current Connection");
+        ThemeManager.styleButton(abortBtn, ThemeManager.ButtonVariant.DANGER);
+        abortBtn.setFont(ThemeManager.getUiFont(Font.PLAIN, 0));
+        abortBtn.addActionListener(e -> {
+            result = Choice.ABORT_CURRENT;
+            dispose();
+        });
+
+        newWindowBtn = new JButton("New Window");
+        ThemeManager.styleButton(newWindowBtn, ThemeManager.ButtonVariant.PRIMARY);
+        newWindowBtn.setFont(ThemeManager.getUiFont(Font.BOLD, 0));
+        newWindowBtn.addActionListener(e -> {
+            result = Choice.NEW_WINDOW;
+            dispose();
+        });
+
+        buttonPanel.add(cancelBtn);
+        buttonPanel.add(abortBtn);
+        buttonPanel.add(newWindowBtn);
+        mainPanel.add(buttonPanel, BorderLayout.SOUTH);
+
+        setContentPane(mainPanel);
+        ThemeManager.applyThemeToWindow(this);
+
+        // ESC key cancels
+        getRootPane().registerKeyboardAction(e -> {
+            result = Choice.CANCEL;
+            dispose();
+        }, KeyStroke.getKeyStroke(KeyEvent.VK_ESCAPE, 0), JComponent.WHEN_IN_FOCUSED_WINDOW);
+
+        getRootPane().setDefaultButton(newWindowBtn);
+
+        pack();
+        if (owner != null) {
+            setLocationRelativeTo(owner);
+        } else {
+            setLocationRelativeTo(null);
+        }
+    }
+
+    public Choice getChoice() {
+        return result;
+    }
+
+    public JButton getNewWindowButton() {
+        return newWindowBtn;
+    }
+
+    public JButton getAbortButton() {
+        return abortBtn;
+    }
+
+    public JButton getCancelButton() {
+        return cancelBtn;
+    }
+
+    public JLabel getTitleLabel() {
+        return titleLabel;
+    }
+
+    public JLabel getLine1() {
+        return line1;
+    }
+
+    public JLabel getLine2() {
+        return line2;
+    }
+
+    public static Choice showPrompt(Window owner, String currentTarget) {
+        ConnectChoiceDialog dialog = new ConnectChoiceDialog(owner, currentTarget);
+        dialog.setVisible(true);
+        return dialog.getChoice();
+    }
+}

j3270/src/main/java/haus/nightmare/j3270/ui/ConnectDialog.java

@@ -36,6 +36,7 @@ public class ConnectDialog extends JDialog {
     private JComboBox<haus.nightmare.lib3270j.graphics.GraphicsMode> graphicsCombo;
     private JComboBox<String> codePageCombo;
     private JTextField luField;
+    private JComboBox<String> hostTypeCombo;
     private JCheckBox tlsCheckBox;
     private JCheckBox verifyCertCheckBox;
     private JCheckBox tn3270eCheckBox;
@@ -214,6 +215,25 @@ public class ConnectDialog extends JDialog {
 
         gridy++;
 
+        // Host Type (CMS/TSO/CICS)
+        gbc.gridx = 0;
+        gbc.gridy = gridy;
+        gbc.weightx = 0;
+        JLabel hostTypeLabel = new JLabel("Host Type:");
+        hostTypeLabel.setFont(labelFont);
+        contentPanel.add(hostTypeLabel, gbc);
+
+        gbc.gridx = 1;
+        gbc.weightx = 1.0;
+        String[] hostTypes = {"TSO", "CMS", "CICS"};
+        hostTypeCombo = new JComboBox<>(hostTypes);
+        hostTypeCombo.setFont(ThemeManager.getUiFont());
+        ThemeManager.styleComboBox(hostTypeCombo);
+        setInitialHostType(haus.nightmare.j3270.config.Settings.getDefaultHostType());
+        contentPanel.add(hostTypeCombo, gbc);
+
+        gridy++;
+
         // 6. Graphics Mode
         gbc.gridx = 0;
         gbc.gridy = gridy;
@@ -565,6 +585,7 @@ public class ConnectDialog extends JDialog {
         } else {
             selectedProfileId = null;
             deleteProfileBtn.setEnabled(false);
+            setInitialHostType(haus.nightmare.j3270.config.Settings.getDefaultHostType());
         }
     }
 
@@ -590,6 +611,7 @@ public class ConnectDialog extends JDialog {
         dynamicRowsSpinner.setValue(h.getDynamicRows() > 0 ? h.getDynamicRows() : 62);
         dynamicColsSpinner.setValue(h.getDynamicCols() > 0 ? h.getDynamicCols() : 160);
         luField.setText(h.getLuName() != null ? h.getLuName() : "");
+        setInitialHostType(h.getHostType() != null ? h.getHostType() : "TSO");
         tlsCheckBox.setSelected(h.isUseTls());
         verifyCertCheckBox.setEnabled(h.isUseTls());
         verifyCertCheckBox.setSelected(h.isTlsVerifyCert());
@@ -677,6 +699,7 @@ public class ConnectDialog extends JDialog {
         int dRows = (Integer) dynamicRowsSpinner.getValue();
         int dCols = (Integer) dynamicColsSpinner.getValue();
         String lu = luField.getText().trim();
+        String hostType = getSelectedHostType();
         boolean tls = tlsCheckBox.isSelected();
         boolean verify = verifyCertCheckBox.isSelected();
         boolean tn3270e = tn3270eCheckBox.isSelected();
@@ -705,7 +728,7 @@ public class ConnectDialog extends JDialog {
         String pPass = new String(proxyPassField.getPassword());
 
         return new SavedHost(id, profileName, h, port, mNum, dRows, dCols, lu, false,
-                "TSO", tls, verify, tn3270e, gfx, cp, ptStr, pHost, pPort, pUser, pPass);
+                hostType, tls, verify, tn3270e, gfx, cp, ptStr, pHost, pPort, pUser, pPass);
     }
 
     // ================= Connect Action =================
@@ -797,10 +820,14 @@ public class ConnectDialog extends JDialog {
             result.setProxy(pType, pHost, pPort, pUser.isEmpty() ? null : pUser, pPass.isEmpty() ? null : pPass);
         }
 
+        result.setHostType(getSelectedHostType());
         if (selectedProfileId != null) {
+            result.setSavedConnection(true);
+            result.setSavedProfileId(selectedProfileId);
             SavedHost existing = HostStorage.findById(selectedProfileId);
             String pName = (existing != null && existing.getName() != null && !existing.getName().trim().isEmpty())
                     ? existing.getName() : host;
+            result.setSavedProfileName(pName);
             SavedHost updated = buildCurrentSavedHost(pName);
             HostStorage.saveHost(updated);
         }
@@ -902,4 +929,44 @@ public class ConnectDialog extends JDialog {
     public String getProxyPassword() {
         return new String(proxyPassField.getPassword());
     }
+
+    public void setInitialHostType(String hostType) {
+        if (hostType != null && hostTypeCombo != null) {
+            for (int i = 0; i < hostTypeCombo.getItemCount(); i++) {
+                if (hostTypeCombo.getItemAt(i).equalsIgnoreCase(hostType.trim())) {
+                    hostTypeCombo.setSelectedIndex(i);
+                    return;
+                }
+            }
+        }
+    }
+
+    public void setInitialHostType(haus.nightmare.lib3270j.ft.FTConfig.HostType hostType) {
+        if (hostType != null) {
+            setInitialHostType(hostType.name());
+        }
+    }
+
+    public String getSelectedHostType() {
+        if (hostTypeCombo != null && hostTypeCombo.getSelectedItem() != null) {
+            return hostTypeCombo.getSelectedItem().toString().trim().toUpperCase();
+        }
+        return "TSO";
+    }
+
+    public haus.nightmare.lib3270j.ft.FTConfig.HostType getSelectedFtHostType() {
+        try {
+            return haus.nightmare.lib3270j.ft.FTConfig.HostType.valueOf(getSelectedHostType());
+        } catch (Exception e) {
+            return haus.nightmare.lib3270j.ft.FTConfig.HostType.TSO;
+        }
+    }
+
+    public JComboBox<String> getHostTypeCombo() {
+        return hostTypeCombo;
+    }
+
+    public String getSelectedProfileId() {
+        return selectedProfileId;
+    }
 }

j3270/src/main/java/haus/nightmare/j3270/ui/HostDirectoryDialog.java

@@ -3,15 +3,19 @@ package haus.nightmare.j3270.ui;
 import haus.nightmare.lib3270j.Telnet3270Client;
 import haus.nightmare.lib3270j.ft.FTConfig;
 import haus.nightmare.lib3270j.ft.dir.CMSDirectoryEntry;
+import haus.nightmare.lib3270j.ft.dir.CMSDirectoryParser;
 import haus.nightmare.lib3270j.ft.dir.HostDirectoryEntry;
 import haus.nightmare.lib3270j.ft.dir.TSODirectoryEntry;
+import haus.nightmare.lib3270j.ft.dir.TSODirectoryParser;
 
 import javax.swing.*;
 import javax.swing.border.EmptyBorder;
-import javax.swing.border.LineBorder;
 import javax.swing.table.DefaultTableModel;
 import javax.swing.table.JTableHeader;
 import java.awt.*;
+import java.awt.datatransfer.Clipboard;
+import java.awt.datatransfer.DataFlavor;
+import java.awt.datatransfer.Transferable;
 import java.awt.event.MouseAdapter;
 import java.awt.event.MouseEvent;
 import java.util.ArrayList;
@@ -19,6 +23,7 @@ import java.util.List;
 
 /**
  * Host Directory and Dataset Catalog browser dialog for TSO and VM/CMS environments.
+ * Aligned with IBM Host On-Demand presentation space queries and clipboard parsing.
  */
 public class HostDirectoryDialog extends JDialog {
 
@@ -27,13 +32,16 @@ public class HostDirectoryDialog extends JDialog {
 
     private JComboBox<FTConfig.HostType> hostTypeCombo;
     private JTextField queryField;
+    private JButton queryHostBtn;
     private JTable table;
     private DefaultTableModel tableModel;
     private JLabel statusLabel;
 
     private String selectedHostFile = null;
+    private HostDirectoryEntry selectedEntry = null;
     private boolean confirmed = false;
 
+    private final List<HostDirectoryEntry> allEntries = new ArrayList<>();
     private final List<HostDirectoryEntry> currentEntries = new ArrayList<>();
 
     public HostDirectoryDialog(Dialog parent, Telnet3270Client client, FTConfig.HostType hostType, String initialQuery) {
@@ -43,7 +51,7 @@ public class HostDirectoryDialog extends JDialog {
         AppIcon.applyTo(this);
 
         buildUI(initialQuery);
-        setSize(700, 420);
+        setSize(840, 480);
         setLocationRelativeTo(parent);
     }
 
@@ -69,33 +77,68 @@ public class HostDirectoryDialog extends JDialog {
         if (initialHostType == FTConfig.HostType.CMS) hostTypeCombo.setSelectedItem(FTConfig.HostType.CMS);
         else hostTypeCombo.setSelectedItem(FTConfig.HostType.TSO);
         ThemeManager.styleComboBox(hostTypeCombo);
+        hostTypeCombo.addActionListener(e -> {
+            setupTableColumns();
+            FTConfig.HostType ht = (FTConfig.HostType) hostTypeCombo.getSelectedItem();
+            if (ht == FTConfig.HostType.CMS) {
+                String cur = queryField.getText().trim();
+                if (cur.isEmpty() || cur.equals("* * *") || cur.equals("*")) {
+                    queryField.setText("* * A");
+                }
+            } else if (ht == FTConfig.HostType.TSO) {
+                String cur = queryField.getText().trim();
+                if (cur.equals("* * A") || cur.equals("* * *")) {
+                    queryField.setText("");
+                }
+            }
+            if (client != null && client.getConnectionState().isFullSession()) {
+                queryHost();
+            } else {
+                parseCurrentScreen();
+            }
+        });
         topPanel.add(hostTypeCombo, gbc);
 
         gbc.gridx = 2;
-        JLabel queryLabel = new JLabel("Query Pattern / Text:");
+        JLabel queryLabel = new JLabel("Filter / Pattern:");
         queryLabel.setFont(font);
         topPanel.add(queryLabel, gbc);
 
         gbc.gridx = 3;
         gbc.weightx = 1.0;
-        queryField = new JTextField(initialQuery != null ? initialQuery : "", 16);
+        String defaultQuery = resolveDefaultQuery(initialHostType, initialQuery);
+        queryField = new JTextField(defaultQuery, 16);
         queryField.setFont(ThemeManager.getMonospacedUiFont());
-        ThemeManager.styleTextField(queryField);
+        queryField.addActionListener(e -> onFilterOrParse());
         topPanel.add(queryField, gbc);
 
         gbc.gridx = 4;
         gbc.weightx = 0;
-        JButton parseBtn = new JButton("Query / Parse");
-        ThemeManager.styleButton(parseBtn, ThemeManager.ButtonVariant.DEFAULT);
-        parseBtn.setFont(font);
-        parseBtn.addActionListener(e -> runQuery());
-        topPanel.add(parseBtn, gbc);
+        JButton filterBtn = new JButton("Filter / Parse");
+        ThemeManager.styleButton(filterBtn, ThemeManager.ButtonVariant.DEFAULT);
+        filterBtn.setFont(font);
+        filterBtn.addActionListener(e -> onFilterOrParse());
+        topPanel.add(filterBtn, gbc);
+
+        gbc.gridx = 5;
+        queryHostBtn = new JButton("Query Host");
+        ThemeManager.styleButton(queryHostBtn, ThemeManager.ButtonVariant.DEFAULT);
+        queryHostBtn.setFont(font);
+        queryHostBtn.setToolTipText("Send LISTCAT or LISTFILE query to active host session");
+        queryHostBtn.addActionListener(e -> queryHost());
+        topPanel.add(queryHostBtn, gbc);
 
         mainPanel.add(topPanel, BorderLayout.NORTH);
 
         // Table
-        tableModel = new DefaultTableModel();
+        tableModel = new DefaultTableModel() {
+            @Override
+            public boolean isCellEditable(int row, int column) {
+                return false;
+            }
+        };
         table = new JTable(tableModel);
+        table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
         ThemeManager.styleTable(table);
         table.setFont(ThemeManager.getMonospacedUiFont());
         table.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
@@ -114,26 +157,42 @@ public class HostDirectoryDialog extends JDialog {
         });
 
         JScrollPane scrollPane = new JScrollPane(table);
+        scrollPane.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
+        scrollPane.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED);
         ThemeManager.styleScrollPane(scrollPane);
         mainPanel.add(scrollPane, BorderLayout.CENTER);
 
         // Bottom
-        JPanel bottomPanel = new JPanel(new BorderLayout(5, 5));
+        JPanel bottomPanel = new JPanel(new BorderLayout(5, 6));
         bottomPanel.setOpaque(false);
+        bottomPanel.setBorder(BorderFactory.createEmptyBorder(6, 4, 4, 4));
 
         statusLabel = new JLabel("Enter a dataset pattern or parse active screen.");
         statusLabel.setForeground(ThemeManager.getFgMuted());
         statusLabel.setFont(font);
-        bottomPanel.add(statusLabel, BorderLayout.WEST);
+        bottomPanel.add(statusLabel, BorderLayout.NORTH);
 
         JPanel btnPanel = new JPanel(new FlowLayout(FlowLayout.RIGHT, 6, 0));
         btnPanel.setOpaque(false);
 
-        JButton pasteScreenBtn = new JButton("Parse Current Screen");
+        JButton inspectBtn = new JButton("Inspect (LISTDS)");
+        ThemeManager.styleButton(inspectBtn, ThemeManager.ButtonVariant.DEFAULT);
+        inspectBtn.setFont(font);
+        inspectBtn.setToolTipText("Retrieve VTOC attributes (RECFM, LRECL, BLKSIZE) for the selected dataset via TSO LISTDS");
+        inspectBtn.addActionListener(e -> inspectSelectedDataset());
+
+        JButton pasteScreenBtn = new JButton("Parse Screen");
         ThemeManager.styleButton(pasteScreenBtn, ThemeManager.ButtonVariant.DEFAULT);
         pasteScreenBtn.setFont(font);
+        pasteScreenBtn.setToolTipText("Parse items currently visible on the 3270 presentation space");
         pasteScreenBtn.addActionListener(e -> parseCurrentScreen());
 
+        JButton pasteClipBtn = new JButton("Paste Clipboard");
+        ThemeManager.styleButton(pasteClipBtn, ThemeManager.ButtonVariant.DEFAULT);
+        pasteClipBtn.setFont(font);
+        pasteClipBtn.setToolTipText("Parse host filenames copied to the system clipboard (HoD compatible)");
+        pasteClipBtn.addActionListener(e -> parseClipboard());
+
         JButton selectBtn = new JButton("Select Dataset");
         ThemeManager.styleButton(selectBtn, ThemeManager.ButtonVariant.PRIMARY);
         selectBtn.setFont(font);
@@ -147,23 +206,28 @@ public class HostDirectoryDialog extends JDialog {
             dispose();
         });
 
+        btnPanel.add(inspectBtn);
         btnPanel.add(pasteScreenBtn);
+        btnPanel.add(pasteClipBtn);
         btnPanel.add(Box.createHorizontalStrut(10));
         btnPanel.add(selectBtn);
         btnPanel.add(cancelBtn);
 
-        bottomPanel.add(btnPanel, BorderLayout.EAST);
+        bottomPanel.add(btnPanel, BorderLayout.SOUTH);
         mainPanel.add(bottomPanel, BorderLayout.SOUTH);
 
         setContentPane(mainPanel);
         ThemeManager.applyThemeToWindow(this);
 
-        // Initial setup
+        // Initial setup: columns and screen parse or host query
         setupTableColumns();
-        if (initialQuery != null && !initialQuery.isEmpty()) {
-            runQuery();
+        if (client != null && client.getConnectionState().isFullSession()) {
+            queryHost();
         } else {
             parseCurrentScreen();
+            if (!queryField.getText().trim().isEmpty()) {
+                applyFilter();
+            }
         }
     }
 
@@ -174,76 +238,665 @@ public class HostDirectoryDialog extends JDialog {
             tableModel.setColumnIdentifiers(new Object[]{
                 "Filename", "Filetype", "Filemode", "Format", "Lrecl", "Records", "Date / Time"
             });
+            int[] widths = {120, 100, 80, 70, 70, 90, 170};
+            for (int i = 0; i < widths.length && i < table.getColumnCount(); i++) {
+                table.getColumnModel().getColumn(i).setPreferredWidth(widths[i]);
+            }
         } else {
             tableModel.setColumnIdentifiers(new Object[]{
-                "Dataset Name", "Volume", "Recfm", "Lrecl", "Blksize", "Tracks", "Extents"
+                "Dataset Name", "Volume"
             });
+            int[] widths = {620, 160};
+            for (int i = 0; i < widths.length && i < table.getColumnCount(); i++) {
+                table.getColumnModel().getColumn(i).setPreferredWidth(widths[i]);
+                if (i == 0) {
+                    table.getColumnModel().getColumn(0).setMinWidth(250);
+                }
+            }
         }
     }
 
-    private void runQuery() {
-        setupTableColumns();
-        currentEntries.clear();
+    private void onFilterOrParse() {
         String query = queryField.getText().trim();
+        // If text contains multiple lines, treat it as pasted raw text to parse
+        if (query.contains("\n") || query.contains("\r") || query.toUpperCase().contains("NONVSAM")
+                || query.toUpperCase().contains("IN-CAT") || query.toUpperCase().contains("FILENAME")) {
+            parseText(query, "query text");
+        } else if (allEntries.isEmpty() && client != null && client.getConnectionState().isFullSession()) {
+            queryHost();
+        } else {
+            applyFilter();
+        }
+    }
+
+    private void queryHost() {
+        if (client == null || !client.getConnectionState().isFullSession()) {
+            statusLabel.setText("No active session to query.");
+            return;
+        }
+
+        String pattern = queryField.getText().trim();
         FTConfig.HostType hostType = (FTConfig.HostType) hostTypeCombo.getSelectedItem();
+        statusLabel.setText("Querying host (" + hostType + ")...");
+        if (queryHostBtn != null) queryHostBtn.setEnabled(false);
+
+        SwingWorker<String, Void> worker = new SwingWorker<>() {
+            @Override
+            protected String doInBackground() throws Exception {
+                if (client == null || client.getPS() == null) return "";
+
+                StringBuilder allPages = new StringBuilder();
+                int maxPages = 500;
 
-        if (client != null && client.getXfer() != null) {
                 if (hostType == FTConfig.HostType.CMS) {
-                List<CMSDirectoryEntry> cmsEntries = client.getXfer().getCmsDirectory(query);
-                currentEntries.addAll(cmsEntries);
-                for (CMSDirectoryEntry entry : cmsEntries) {
-                    tableModel.addRow(new Object[]{
-                        entry.getFilename(), entry.getFiletype(), entry.getFilemode(),
-                        entry.getRecfm(), entry.getLrecl(), entry.getNumRecords(), entry.getDate() + " " + entry.getTime()
-                    });
+                    // CMS Query:
+                    // 1. Clear presentation space first to ensure clean state
+                    client.getPS().SendKeys("[clear]");
+                    waitForKeyboardUnlock(client, 3000);
+
+                    // 2. Format CMS LISTFILE query command (default to minidisk A unless specified)
+                    String cmsFilter = formatCMSFilter(pattern);
+                    client.getPS().SendKeys("LISTFILE " + cmsFilter + " ( nohead alloc date[enter]");
+                    Thread.sleep(100);
+
+                    // 3. Multi-page collection loop:
+                    // CMS pagination displays MORE... or HOLDING when a screen is full.
+                    // When advanced with [clear], CMS flashes RUNNING while generating the next screen.
+                    // We poll up to 10 seconds per page for MORE... / HOLDING or Ready;
+                    for (int page = 0; page < maxPages; page++) {
+                        long startWait = System.currentTimeMillis();
+                        long timeoutMs = 10000; // 10 seconds per page
+                        String screen = "";
+                        boolean isMore = false;
+
+                        while (System.currentTimeMillis() - startWait < timeoutMs) {
+                            waitForKeyboardUnlock(client, 500);
+                            int rows = client.getPS().getRows();
+                            int cols = client.getPS().getCols();
+                            screen = client.getPS().copyString(0, 0, rows - 1, cols - 1);
+                            String upper = screen.toUpperCase();
+
+                            if (upper.contains("MORE...") || upper.contains("HOLDING")) {
+                                isMore = true;
+                                break;
+                            }
+                            if (upper.contains("READY;") || upper.contains("READY(")) {
+                                break;
+                            }
+                            // Still RUNNING or transitioning, wait and re-check
+                            Thread.sleep(150);
+                        }
+
+                        allPages.append(screen).append("\n");
+
+                        if (isMore) {
+                            // In CMS, sending [clear] advances to the next page of output
+                            client.getPS().SendKeys("[clear]");
+                            Thread.sleep(100);
+                            waitForKeyboardUnlock(client, 3000);
+                        } else {
+                            // Ready; encountered or timed out -> listing complete
+                            break;
+                        }
+                    }
+
+                    // Automatically clear the listing from the terminal presentation space
+                    // so the terminal screen is left clean for the user while keeping the dialog populated
+                    if (client.getPS() != null) {
+                        client.getPS().SendKeys("[clear]");
+                        waitForKeyboardUnlock(client, 3000);
+                    }
+
+                } else {
+                    // TSO Query:
+                    // Check if current screen is in ISPF (formatted screen or containing ===> or ISPF)
+                    int rows = client.getPS().getRows();
+                    int cols = client.getPS().getCols();
+                    String initialScreen = client.getPS().copyString(0, 0, rows - 1, cols - 1);
+                    boolean isFormatted = client.getScreenBuffer() != null && client.getScreenBuffer().isFormatted();
+                    boolean hasCmdArrow = initialScreen.contains("===>");
+                    boolean isIspf = isFormatted || hasCmdArrow || initialScreen.contains("ISPF");
+
+                    String tsoCmd = "TSO LISTCAT ALL";
+                    if (!pattern.isEmpty()) {
+                        String dsnPattern = pattern.trim();
+                        if (dsnPattern.startsWith("'") && dsnPattern.endsWith("'") && dsnPattern.length() > 2) {
+                            dsnPattern = dsnPattern.substring(1, dsnPattern.length() - 1);
+                        }
+                        int paren = dsnPattern.indexOf('(');
+                        if (paren > 0) {
+                            dsnPattern = dsnPattern.substring(0, paren);
+                        }
+                        if (dsnPattern.equals("*") || dsnPattern.equals("* * *") || dsnPattern.equals("*.*")) {
+                            tsoCmd = "TSO LISTCAT ALL";
+                        } else {
+                            String level = dsnPattern;
+                            if (level.endsWith(".*")) {
+                                level = level.substring(0, level.length() - 2);
+                            } else if (level.endsWith("*")) {
+                                level = level.substring(0, level.length() - 1);
+                            }
+                            if (level.isEmpty()) {
+                                tsoCmd = "TSO LISTCAT ALL";
+                            } else {
+                                tsoCmd = "TSO LISTCAT LEVEL(" + level + ") ALL";
+                            }
+                        }
+                    }
+
+                    if (isIspf) {
+                        // In ISPF, do NOT send [clear] because [clear] destroys the ISPF panel.
+                        // Locate the command/option line (indicated by ===>) or home to first input field.
+                        int arrowPos = initialScreen.indexOf("===>");
+                        if (arrowPos >= 0 && client.getScreenBuffer() != null) {
+                            int inputAddr = client.getScreenBuffer().findNextUnprotected(arrowPos);
+                            if (inputAddr > 0) {
+                                client.getScreenBuffer().setCursorAddress(inputAddr);
+                                client.getScreenBuffer().updateDisplaySnapshot();
+                            } else {
+                                client.getPS().SendKeys("[home]");
                             }
                         } else {
-                List<TSODirectoryEntry> tsoEntries = client.getXfer().getTsoDirectory(query);
-                currentEntries.addAll(tsoEntries);
-                for (TSODirectoryEntry entry : tsoEntries) {
-                    tableModel.addRow(new Object[]{
-                        entry.getDatasetName(), entry.getVolume(), entry.getRecfm(),
-                        entry.getLrecl(), entry.getBlksize(), entry.getTracksAllocated(), entry.getExtents()
-                    });
+                            client.getPS().SendKeys("[home]");
+                        }
+                        client.getPS().SendKeys("[erase_eof]");
+                        client.getPS().SendKeys(tsoCmd + "[enter]");
+                    } else {
+                        // In native TSO (ISPF closed, line mode READY prompt)
+                        client.getPS().SendKeys("[clear]");
+                        waitForKeyboardUnlock(client, 3000);
+                        client.getPS().SendKeys(tsoCmd + "[enter]");
+                    }
+
+                    Thread.sleep(100);
+
+                    // Multi-page collection loop for TSO:
+                    // 1. Wait for output to start appearing after sending command
+                    long startCmd = System.currentTimeMillis();
+                    while (System.currentTimeMillis() - startCmd < 4000) {
+                        waitForKeyboardUnlock(client, 200);
+                        int r = client.getPS().getRows();
+                        int c = client.getPS().getCols();
+                        String s = client.getPS().copyString(0, 0, r - 1, c - 1);
+                        String u = s.toUpperCase();
+                        if (u.contains("NONVSAM") || u.contains("CLUSTER") || u.contains("GDG")
+                                || u.contains("ALIAS") || u.contains("IN-CAT") || u.contains("IDCAMS")
+                                || u.contains("***") || u.contains("READY") || u.contains("NOT FOUND")
+                                || u.contains("NO ENTRY") || s.contains(" --- ")
+                                || u.contains("--RECFM-") || u.contains("--VOLUMES--")) {
+                            break;
+                        }
+                        Thread.sleep(80);
+                    }
+
+                    // 2. Multi-page collection
+                    String prevScreen = "";
+                    for (int page = 0; page < maxPages; page++) {
+                        waitForKeyboardUnlock(client, 300);
+                        int r = client.getPS().getRows();
+                        int c = client.getPS().getCols();
+                        String screen = client.getPS().copyString(0, 0, r - 1, c - 1);
+                        String upper = screen.toUpperCase();
+
+                        if (screen.equals(prevScreen) || screen.trim().isEmpty()) {
+                            break;
+                        }
+                        prevScreen = screen;
+                        allPages.append(screen).append("\n");
+
+                        if (upper.contains("***")) {
+                            client.getPS().SendKeys("[enter]");
+                            Thread.sleep(100);
+                            waitForKeyboardUnlock(client, 2000);
+                        } else if (upper.contains("NONVSAM") || upper.contains("CLUSTER") || upper.contains("GDG")
+                                || upper.contains("ALIAS") || upper.contains("IDCAMS") || screen.contains(" --- ")
+                                || upper.contains("--RECFM-") || upper.contains("--VOLUMES--")) {
+                            // If screen shows dataset data without ***, send [enter] once to see if *** or more output is triggered
+                            client.getPS().SendKeys("[enter]");
+                            Thread.sleep(100);
+                            waitForKeyboardUnlock(client, 1000);
+
+                            int r2 = client.getPS().getRows();
+                            int c2 = client.getPS().getCols();
+                            String s2 = client.getPS().copyString(0, 0, r2 - 1, c2 - 1);
+                            if (s2.toUpperCase().contains("***")) {
+                                prevScreen = s2;
+                                allPages.append(s2).append("\n");
+                                client.getPS().SendKeys("[enter]");
+                                Thread.sleep(100);
+                                waitForKeyboardUnlock(client, 2000);
+                                continue;
+                            } else {
+                                if (!s2.equals(screen) && !s2.trim().isEmpty()) {
+                                    allPages.append(s2).append("\n");
+                                }
+                                break;
+                            }
+                        } else {
+                            break;
+                        }
+                    }
+
+                    // 3. Terminal clean-up: clear the list from the terminal presentation space
+                    if (client.getPS() != null) {
+                        if (isIspf) {
+                            client.getPS().SendKeys("[enter]");
+                            Thread.sleep(150);
+                            waitForKeyboardUnlock(client, 1500);
+
+                            int r = client.getPS().getRows();
+                            int c = client.getPS().getCols();
+                            String currentScr = client.getPS().copyString(0, 0, r - 1, c - 1);
+                            if (currentScr.toUpperCase().contains("NONVSAM") || currentScr.toUpperCase().contains("IDCAMS")
+                                    || currentScr.contains(" --- ") || currentScr.toUpperCase().contains("--RECFM-")
+                                    || (client.getScreenBuffer() != null && !client.getScreenBuffer().isFormatted())) {
+                                client.getPS().SendKeys("[clear]");
+                                waitForKeyboardUnlock(client, 2000);
+                            }
+                        } else {
+                            client.getPS().SendKeys("[clear]");
+                            waitForKeyboardUnlock(client, 2000);
                         }
                     }
                 }
 
-        statusLabel.setText(currentEntries.size() + " entries found.");
+                return allPages.toString();
+            }
+
+            @Override
+            protected void done() {
+                if (queryHostBtn != null) queryHostBtn.setEnabled(true);
+                try {
+                    String screenText = get();
+                    parseText(screenText, "host query");
+                    if (!pattern.isEmpty() && !allEntries.isEmpty()) {
+                        applyFilter();
+                    }
+                } catch (Exception ex) {
+                    statusLabel.setText("Host query failed: " + ex.getMessage());
+                }
+            }
+        };
+        worker.execute();
+    }
+
+    private void inspectSelectedDataset() {
+        int row = table.getSelectedRow();
+        if (row < 0 || row >= currentEntries.size()) {
+            JOptionPane.showMessageDialog(this, "Please select an entry from the table to inspect.",
+                    "No Selection", JOptionPane.INFORMATION_MESSAGE);
+            return;
+        }
+
+        HostDirectoryEntry entry = currentEntries.get(row);
+        if (!(entry instanceof TSODirectoryEntry)) {
+            JOptionPane.showMessageDialog(this, "Inspection is only supported for TSO datasets.",
+                    "Not Supported", JOptionPane.INFORMATION_MESSAGE);
+            return;
+        }
+
+        if (client == null || !client.getConnectionState().isFullSession()) {
+            JOptionPane.showMessageDialog(this, "No active full 3270 session to query host.",
+                    "Not Connected", JOptionPane.WARNING_MESSAGE);
+            return;
+        }
+
+        TSODirectoryEntry tso = (TSODirectoryEntry) entry;
+        String dsn = tso.getDatasetName();
+        if (dsn == null || dsn.trim().isEmpty()) {
+            return;
+        }
+
+        statusLabel.setText("Inspecting " + dsn + " via TSO LISTDS...");
+
+        SwingWorker<String, Void> worker = new SwingWorker<String, Void>() {
+            @Override
+            protected String doInBackground() throws Exception {
+                StringBuilder output = new StringBuilder();
+                int rows = client.getPS().getRows();
+                int cols = client.getPS().getCols();
+                String initialScreen = client.getPS().copyString(0, 0, rows - 1, cols - 1);
+                boolean isFormatted = client.getScreenBuffer() != null && client.getScreenBuffer().isFormatted();
+                boolean hasCmdArrow = initialScreen.contains("===>");
+                boolean isIspf = isFormatted || hasCmdArrow || initialScreen.contains("ISPF");
+
+                String tsoCmd = "TSO LISTDS '" + dsn + "' STATUS";
+
+                if (isIspf) {
+                    int arrowPos = initialScreen.indexOf("===>");
+                    if (arrowPos >= 0 && client.getScreenBuffer() != null) {
+                        int inputAddr = client.getScreenBuffer().findNextUnprotected(arrowPos);
+                        if (inputAddr > 0) {
+                            client.getScreenBuffer().setCursorAddress(inputAddr);
+                            client.getScreenBuffer().updateDisplaySnapshot();
+                        } else {
+                            client.getPS().SendKeys("[home]");
+                        }
+                    } else {
+                        client.getPS().SendKeys("[home]");
+                    }
+                    client.getPS().SendKeys("[erase_eof]");
+                    client.getPS().SendKeys(tsoCmd + "[enter]");
+                } else {
+                    client.getPS().SendKeys("[clear]");
+                    waitForKeyboardUnlock(client, 3000);
+                    client.getPS().SendKeys(tsoCmd + "[enter]");
+                }
+
+                Thread.sleep(100);
+
+                // Wait for output to start appearing
+                long startCmd = System.currentTimeMillis();
+                while (System.currentTimeMillis() - startCmd < 4000) {
+                    waitForKeyboardUnlock(client, 200);
+                    int r = client.getPS().getRows();
+                    int c = client.getPS().getCols();
+                    String s = client.getPS().copyString(0, 0, r - 1, c - 1);
+                    String u = s.toUpperCase();
+                    if (u.contains("--RECFM-") || u.contains("--VOLUMES--") || u.contains("***")
+                            || u.contains("READY") || u.contains("NOT IN CATALOG") || u.contains("NOT FOUND")) {
+                        break;
+                    }
+                    Thread.sleep(80);
+                }
+
+                String prevScreen = "";
+                for (int page = 0; page < 5; page++) {
+                    waitForKeyboardUnlock(client, 300);
+                    int r = client.getPS().getRows();
+                    int c = client.getPS().getCols();
+                    String screen = client.getPS().copyString(0, 0, r - 1, c - 1);
+                    String upper = screen.toUpperCase();
+
+                    if (screen.equals(prevScreen) || screen.trim().isEmpty()) {
+                        break;
+                    }
+                    prevScreen = screen;
+                    output.append(screen).append("\n");
+
+                    if (upper.contains("***")) {
+                        client.getPS().SendKeys("[enter]");
+                        Thread.sleep(100);
+                        waitForKeyboardUnlock(client, 2000);
+                    } else {
+                        break;
+                    }
+                }
+
+                // Terminal cleanup
+                if (client.getPS() != null) {
+                    if (isIspf) {
+                        client.getPS().SendKeys("[enter]");
+                        Thread.sleep(150);
+                        waitForKeyboardUnlock(client, 1500);
+
+                        int r = client.getPS().getRows();
+                        int c = client.getPS().getCols();
+                        String currentScr = client.getPS().copyString(0, 0, r - 1, c - 1);
+                        if (currentScr.toUpperCase().contains("--RECFM-") || (client.getScreenBuffer() != null && !client.getScreenBuffer().isFormatted())) {
+                            client.getPS().SendKeys("[clear]");
+                            waitForKeyboardUnlock(client, 2000);
+                        }
+                    } else {
+                        client.getPS().SendKeys("[clear]");
+                        waitForKeyboardUnlock(client, 2000);
+                    }
+                }
+
+                return output.toString();
+            }
+
+            @Override
+            protected void done() {
+                try {
+                    String outText = get();
+                    List<TSODirectoryEntry> parsed = TSODirectoryParser.parse(outText);
+                    if (!parsed.isEmpty()) {
+                        TSODirectoryEntry updated = parsed.get(0);
+                        if (updated.getRecfm() != null) tso.setRecfm(updated.getRecfm());
+                        if (updated.getLrecl() > 0) tso.setLrecl(updated.getLrecl());
+                        if (updated.getBlksize() > 0) tso.setBlksize(updated.getBlksize());
+                        if (updated.getDsorg() != null) tso.setDsorg(updated.getDsorg());
+                        if (updated.getVolume() != null && (tso.getVolume() == null || tso.getVolume().equals("******") || tso.getVolume().isEmpty())) {
+                            tso.setVolume(updated.getVolume());
+                        }
+
+                        // Update table row in view
+                        int modelRow = table.convertRowIndexToModel(row);
+                        if (modelRow >= 0 && modelRow < tableModel.getRowCount()) {
+                            tableModel.setValueAt(tso.getVolume() != null ? tso.getVolume() : "", modelRow, 1);
+                        }
+
+                        statusLabel.setText("Attributes for " + dsn + ": RECFM=" + tso.getRecfm() + ", LRECL=" + tso.getLrecl() + ", BLKSIZE=" + tso.getBlksize() + ", VOL=" + tso.getVolume());
+
+                        StringBuilder msg = new StringBuilder();
+                        msg.append("Dataset: ").append(dsn).append("\n\n");
+                        msg.append("Volume: ").append(tso.getVolume() != null ? tso.getVolume() : "N/A").append("\n");
+                        msg.append("Record Format (RECFM): ").append(tso.getRecfm() != null ? tso.getRecfm() : "N/A").append("\n");
+                        msg.append("Logical Record Length (LRECL): ").append(tso.getLrecl() > 0 ? String.valueOf(tso.getLrecl()) : "N/A").append("\n");
+                        msg.append("Block Size (BLKSIZE): ").append(tso.getBlksize() > 0 ? String.valueOf(tso.getBlksize()) : "N/A").append("\n");
+                        msg.append("Dataset Organization (DSORG): ").append(tso.getDsorg() != null ? tso.getDsorg() : "N/A").append("\n");
+                        if (tso.getTracksAllocated() > 0) {
+                            msg.append("Allocated Tracks: ").append(tso.getTracksAllocated()).append("\n");
+                        }
+                        if (tso.getExtents() > 0) {
+                            msg.append("Extents: ").append(tso.getExtents()).append("\n");
+                        }
+                        JOptionPane.showMessageDialog(HostDirectoryDialog.this, msg.toString(), "Dataset Attributes (LISTDS)", JOptionPane.INFORMATION_MESSAGE);
+                    } else {
+                        statusLabel.setText("No VTOC attributes found for " + dsn);
+                    }
+                } catch (Exception ex) {
+                    statusLabel.setText("Inspection failed: " + ex.getMessage());
+                }
+            }
+        };
+        worker.execute();
+    }
+
+    private static boolean waitForKeyboardUnlock(Telnet3270Client client, long timeoutMs) {
+        if (client == null) return false;
+        long deadline = System.currentTimeMillis() + timeoutMs;
+        while (System.currentTimeMillis() < deadline) {
+            boolean locked = false;
+            if (client.getInputProcessor() != null && client.getInputProcessor().isKeyboardLocked()) {
+                locked = true;
+            }
+            if (client.getOIA() != null && (client.getOIA().isKeyLocked() || client.getOIA().isXSystem())) {
+                locked = true;
+            }
+            if (!locked) {
+                return true;
+            }
+            try {
+                Thread.sleep(40);
+            } catch (InterruptedException e) {
+                Thread.currentThread().interrupt();
+                return false;
+            }
+        }
+        return false;
     }
 
     private void parseCurrentScreen() {
-        if (client == null || !client.getConnectionState().isFullSession()) {
+        if (client == null || !client.getConnectionState().isFullSession() || client.getPS() == null) {
             statusLabel.setText("No active session to parse.");
             return;
         }
 
+        int rows = client.getPS().getRows();
+        int cols = client.getPS().getCols();
+        String screenText = client.getPS().copyString(0, 0, rows - 1, cols - 1);
+        parseText(screenText, "presentation space");
+    }
+
+    private void parseClipboard() {
+        try {
+            Clipboard clipboard = Toolkit.getDefaultToolkit().getSystemClipboard();
+            Transferable contents = clipboard.getContents(null);
+            if (contents != null && contents.isDataFlavorSupported(DataFlavor.stringFlavor)) {
+                String clipText = (String) contents.getTransferData(DataFlavor.stringFlavor);
+                if (clipText != null && !clipText.trim().isEmpty()) {
+                    parseText(clipText, "clipboard");
+                    return;
+                }
+            }
+            statusLabel.setText("Clipboard contains no text.");
+        } catch (Exception ex) {
+            statusLabel.setText("Error reading clipboard: " + ex.getMessage());
+        }
+    }
+
+    private void parseText(String text, String source) {
         setupTableColumns();
-        currentEntries.clear();
+        allEntries.clear();
         FTConfig.HostType hostType = (FTConfig.HostType) hostTypeCombo.getSelectedItem();
-        String screenText = client.getPS().getString(0, client.getPS().getSize());
 
         if (hostType == FTConfig.HostType.CMS) {
-            List<CMSDirectoryEntry> cmsEntries = client.getXfer().getCmsDirectory(screenText);
-            currentEntries.addAll(cmsEntries);
-            for (CMSDirectoryEntry entry : cmsEntries) {
-                tableModel.addRow(new Object[]{
-                    entry.getFilename(), entry.getFiletype(), entry.getFilemode(),
-                    entry.getRecfm(), entry.getLrecl(), entry.getNumRecords(), entry.getDate() + " " + entry.getTime()
-                });
-            }
+            List<CMSDirectoryEntry> cmsEntries = CMSDirectoryParser.parse(text);
+            allEntries.addAll(cmsEntries);
         } else {
-            List<TSODirectoryEntry> tsoEntries = client.getXfer().getTsoDirectory(screenText);
-            currentEntries.addAll(tsoEntries);
-            for (TSODirectoryEntry entry : tsoEntries) {
+            List<TSODirectoryEntry> tsoEntries = TSODirectoryParser.parse(text);
+            allEntries.addAll(tsoEntries);
+        }
+
+        applyFilter();
+        if (allEntries.isEmpty()) {
+            statusLabel.setText("0 entries found from " + source + ". Use 'Query Host' or 'Paste Clipboard'.");
+        } else {
+            statusLabel.setText("Parsed " + allEntries.size() + " entries from " + source + ".");
+        }
+    }
+
+    private void applyFilter() {
+        tableModel.setRowCount(0);
+        currentEntries.clear();
+        String filter = queryField.getText().trim();
+        FTConfig.HostType hostType = (FTConfig.HostType) hostTypeCombo.getSelectedItem();
+
+        for (HostDirectoryEntry entry : allEntries) {
+            if (!matchesFilter(entry, filter)) {
+                continue;
+            }
+            currentEntries.add(entry);
+            if (hostType == FTConfig.HostType.CMS && entry instanceof CMSDirectoryEntry) {
+                CMSDirectoryEntry cms = (CMSDirectoryEntry) entry;
                 tableModel.addRow(new Object[]{
-                    entry.getDatasetName(), entry.getVolume(), entry.getRecfm(),
-                    entry.getLrecl(), entry.getBlksize(), entry.getTracksAllocated(), entry.getExtents()
+                    cms.getFilename() != null ? cms.getFilename() : "",
+                    cms.getFiletype() != null ? cms.getFiletype() : "",
+                    cms.getFilemode() != null ? cms.getFilemode() : "",
+                    cms.getRecfm() != null ? cms.getRecfm() : "",
+                    cms.getLrecl() > 0 ? String.valueOf(cms.getLrecl()) : "",
+                    cms.getNumRecords() > 0 ? String.valueOf(cms.getNumRecords()) : "",
+                    (cms.getDate() != null ? cms.getDate() : "") + " " + (cms.getTime() != null ? cms.getTime() : "")
+                });
+            } else if (entry instanceof TSODirectoryEntry) {
+                TSODirectoryEntry tso = (TSODirectoryEntry) entry;
+                tableModel.addRow(new Object[]{
+                    tso.getDatasetName() != null ? tso.getDatasetName() : "",
+                    tso.getVolume() != null ? tso.getVolume() : ""
                 });
             }
         }
 
-        statusLabel.setText("Parsed " + currentEntries.size() + " entries from presentation space.");
+        if (!allEntries.isEmpty()) {
+            statusLabel.setText(currentEntries.size() + " entries shown (" + allEntries.size() + " total).");
+        }
+    }
+
+    public static boolean matchesFilter(HostDirectoryEntry entry, String filter) {
+        if (filter == null || filter.trim().isEmpty()) {
+            return true;
+        }
+        String cleanFilter = filter.replace("'", "").replace("\"", "").trim();
+        if (cleanFilter.isEmpty() || cleanFilter.equals("*") || cleanFilter.equals("* * *") || cleanFilter.equals("*.*")) {
+            return true;
+        }
+
+        if (entry instanceof CMSDirectoryEntry) {
+            return matchesCmsFilter((CMSDirectoryEntry) entry, cleanFilter);
+        } else if (entry instanceof TSODirectoryEntry) {
+            return matchesTsoFilter((TSODirectoryEntry) entry, cleanFilter);
+        } else {
+            return matchesWildcard(entry.getName(), cleanFilter);
+        }
+    }
+
+    public static boolean matchesCmsFilter(CMSDirectoryEntry cms, String filter) {
+        String fn = cms.getFilename() != null ? cms.getFilename().trim() : "";
+        String ft = cms.getFiletype() != null ? cms.getFiletype().trim() : "";
+        String fm = cms.getFilemode() != null ? cms.getFilemode().trim() : "";
+
+        String[] tokens = filter.split("\\s+");
+        if (tokens.length >= 3) {
+            String fnPat = tokens[0];
+            String ftPat = tokens[1];
+            String fmPat = tokens[2];
+            return matchesWildcard(fn, fnPat)
+                    && matchesWildcard(ft, ftPat)
+                    && matchesCmsFilemode(fm, fmPat);
+        } else if (tokens.length == 2) {
+            String fnPat = tokens[0];
+            String ftPat = tokens[1];
+            return matchesWildcard(fn, fnPat) && matchesWildcard(ft, ftPat);
+        } else {
+            String tok = tokens[0];
+            if (tok.contains(".")) {
+                int dot = tok.indexOf('.');
+                String fnPat = tok.substring(0, dot);
+                String ftPat = tok.substring(dot + 1);
+                return matchesWildcard(fn, fnPat) && matchesWildcard(ft, ftPat);
+            }
+            if (matchesWildcard(fn, tok) || matchesWildcard(ft, tok) || matchesCmsFilemode(fm, tok)) {
+                return true;
+            }
+            return matchesWildcard(cms.getName(), tok);
+        }
+    }
+
+    public static boolean matchesCmsFilemode(String actualFm, String fmPattern) {
+        if (fmPattern == null || fmPattern.isEmpty() || fmPattern.equals("*")) {
+            return true;
+        }
+        if (actualFm == null || actualFm.isEmpty()) {
+            return false;
+        }
+        if (fmPattern.length() == 1 && Character.isLetter(fmPattern.charAt(0))) {
+            return actualFm.toUpperCase().startsWith(fmPattern.toUpperCase());
+        }
+        return matchesWildcard(actualFm, fmPattern);
+    }
+
+    public static boolean matchesTsoFilter(TSODirectoryEntry tso, String filter) {
+        String dsn = tso.getDatasetName() != null ? tso.getDatasetName().trim() : "";
+        if (filter.equals("*") || filter.equals("* * *") || filter.equals("*.*")) {
+            return true;
+        }
+        if (filter.contains("*") || filter.contains("?")) {
+            return matchesWildcard(dsn, filter);
+        }
+        return dsn.toUpperCase().contains(filter.toUpperCase());
+    }
+
+    public static boolean matchesWildcard(String text, String pattern) {
+        if (text == null) text = "";
+        if (pattern == null || pattern.isEmpty() || pattern.equals("*")) return true;
+
+        StringBuilder regex = new StringBuilder("^");
+        for (int i = 0; i < pattern.length(); i++) {
+            char c = pattern.charAt(i);
+            if (c == '*') {
+                regex.append(".*");
+            } else if (c == '?') {
+                regex.append(".");
+            } else if ("\\.[]{}()+^$|".indexOf(c) >= 0) {
+                regex.append("\\").append(c);
+            } else {
+                regex.append(Character.toUpperCase(c));
+            }
+        }
+        regex.append("$");
+        return text.toUpperCase().matches(regex.toString());
     }
 
     private void onConfirmSelection() {
@@ -256,6 +909,7 @@ public class HostDirectoryDialog extends JDialog {
 
         HostDirectoryEntry entry = currentEntries.get(row);
         selectedHostFile = entry.getName();
+        selectedEntry = entry;
         confirmed = true;
         dispose();
     }
@@ -267,4 +921,50 @@ public class HostDirectoryDialog extends JDialog {
     public String getSelectedHostFile() {
         return selectedHostFile;
     }
+
+    public HostDirectoryEntry getSelectedEntry() {
+        return selectedEntry;
+    }
+
+    public List<HostDirectoryEntry> getAllEntries() {
+        return allEntries;
+    }
+
+    public List<HostDirectoryEntry> getCurrentEntries() {
+        return currentEntries;
+    }
+
+    public JTextField getQueryField() {
+        return queryField;
+    }
+
+    public static String resolveDefaultQuery(FTConfig.HostType hostType, String initialQuery) {
+        String defaultQuery = initialQuery != null ? initialQuery.trim() : "";
+        if (hostType == FTConfig.HostType.CMS && (defaultQuery.isEmpty() || defaultQuery.equals("* * *") || defaultQuery.equals("*"))) {
+            defaultQuery = "* * A";
+        }
+        return defaultQuery;
+    }
+
+    public static String formatCMSFilter(String pattern) {
+        if (pattern == null || pattern.trim().isEmpty()) {
+            return "* * A";
+        }
+        String clean = pattern.replace("'", "").replace("\"", "").trim();
+        if (clean.equals("* * *") || clean.equals("*")) {
+            return "* * A";
+        } else if (clean.contains(".")) {
+            int dot = clean.indexOf('.');
+            return clean.substring(0, dot).trim() + " " + clean.substring(dot + 1).trim() + " A";
+        } else {
+            String[] parts = clean.split("\\s+");
+            if (parts.length == 1) {
+                return parts[0] + " * A";
+            } else if (parts.length == 2) {
+                return parts[0] + " " + parts[1] + " A";
+            } else {
+                return parts[0] + " " + parts[1] + " " + parts[2];
+            }
+        }
+    }
 }

j3270/src/main/java/haus/nightmare/j3270/ui/SettingsDialog.java

@@ -11,12 +11,16 @@ import java.io.File;
 import java.io.FileNotFoundException;
 import java.io.IOException;
 import java.util.HashMap;
+import java.util.List;
 import java.util.Map;
+import java.util.Objects;
 import javax.swing.table.DefaultTableModel;
 import javax.swing.table.DefaultTableCellRenderer;
 import javax.swing.table.JTableHeader;
 import javax.swing.border.LineBorder;
 import javax.swing.border.TitledBorder;
+import haus.nightmare.j3270.storage.HostStorage;
+import haus.nightmare.j3270.storage.SavedHost;
 
 public class SettingsDialog extends JDialog {
 
@@ -58,8 +62,7 @@ public class SettingsDialog extends JDialog {
     // Connection tab
     private JComboBox<Settings.StartupBehavior> startupBehaviorBox;
     private JPanel autoConnectPanel;
-    private JTextField hostField;
-    private JTextField portField;
+    private JComboBox<SavedHost> savedHostBox;
     private JCheckBox autoReconnectCheck;
     private JSpinner dynamicRowsSpinner;
     private JSpinner dynamicColsSpinner;
@@ -83,6 +86,8 @@ public class SettingsDialog extends JDialog {
     // Bottom action buttons
     private JButton btnImport;
     private JButton btnExport;
+    private JButton btnImportConnections;
+    private JButton btnExportConnections;
 
     // Colors tab component tracking
     private final JPanel[] hostColorSwatches = new JPanel[16];
@@ -94,7 +99,7 @@ public class SettingsDialog extends JDialog {
         AppIcon.applyTo(this);
 
         initComponents();
-        setSize(660, 540);
+        setSize(680, 650);
         setLocationRelativeTo(parent);
     }
 
@@ -107,13 +112,18 @@ public class SettingsDialog extends JDialog {
         tabbedPane.addTab("Connection", createConnectionPanel());
         tabbedPane.addTab("Entry Assist", createEntryAssistPanel());
 
-        JPanel buttonPanel = new JPanel(new FlowLayout(FlowLayout.RIGHT, 8, 8));
         btnImport = new JButton("Import Config...");
         ThemeManager.styleButton(btnImport, ThemeManager.ButtonVariant.DEFAULT);
 
         btnExport = new JButton("Export Config...");
         ThemeManager.styleButton(btnExport, ThemeManager.ButtonVariant.DEFAULT);
 
+        btnImportConnections = new JButton("Import Connections...");
+        ThemeManager.styleButton(btnImportConnections, ThemeManager.ButtonVariant.DEFAULT);
+
+        btnExportConnections = new JButton("Export Connections...");
+        ThemeManager.styleButton(btnExportConnections, ThemeManager.ButtonVariant.DEFAULT);
+
         JButton btnApply = new JButton("Apply");
         ThemeManager.styleButton(btnApply, ThemeManager.ButtonVariant.DEFAULT);
 
@@ -131,6 +141,14 @@ public class SettingsDialog extends JDialog {
             exportConfig();
         });
 
+        btnImportConnections.addActionListener((ActionEvent e) -> {
+            importConnections();
+        });
+
+        btnExportConnections.addActionListener((ActionEvent e) -> {
+            exportConnections();
+        });
+
         btnOk.addActionListener((ActionEvent e) -> {
             boolean success = applySettings();
             if (success) {
@@ -146,12 +164,28 @@ public class SettingsDialog extends JDialog {
             dispose();
         });
 
-        buttonPanel.add(btnImport);
-        buttonPanel.add(btnExport);
-        buttonPanel.add(Box.createHorizontalStrut(20));
-        buttonPanel.add(btnApply);
-        buttonPanel.add(btnCancel);
-        buttonPanel.add(btnOk);
+        JPanel buttonPanel = new JPanel(new GridLayout(3, 1, 0, 4));
+        buttonPanel.setBorder(BorderFactory.createEmptyBorder(4, 8, 8, 8));
+
+        JPanel row1 = new JPanel(new FlowLayout(FlowLayout.RIGHT, 6, 2));
+        row1.setOpaque(false);
+        row1.add(btnImport);
+        row1.add(btnExport);
+
+        JPanel row2 = new JPanel(new FlowLayout(FlowLayout.RIGHT, 6, 2));
+        row2.setOpaque(false);
+        row2.add(btnImportConnections);
+        row2.add(btnExportConnections);
+
+        JPanel row3 = new JPanel(new FlowLayout(FlowLayout.RIGHT, 6, 2));
+        row3.setOpaque(false);
+        row3.add(btnApply);
+        row3.add(btnCancel);
+        row3.add(btnOk);
+
+        buttonPanel.add(row1);
+        buttonPanel.add(row2);
+        buttonPanel.add(row3);
 
         getContentPane().add(tabbedPane, BorderLayout.CENTER);
         getContentPane().add(buttonPanel, BorderLayout.SOUTH);
@@ -588,22 +622,33 @@ public class SettingsDialog extends JDialog {
         acGbc.insets = new Insets(5, 5, 5, 5);
         acGbc.anchor = GridBagConstraints.WEST;
 
-        JLabel hostLabel = new JLabel("Host:");
+        JLabel savedConnLabel = new JLabel("Saved Connection:");
         acGbc.gridx = 0;
         acGbc.gridy = 0;
-        autoConnectPanel.add(hostLabel, acGbc);
+        autoConnectPanel.add(savedConnLabel, acGbc);
 
-        hostField = new JTextField(Settings.getAutoConnectHost(), 15);
+        savedHostBox = new JComboBox<>();
+        savedHostBox.setRenderer(new DefaultListCellRenderer() {
+            @Override
+            public Component getListCellRendererComponent(JList<?> list, Object value, int index, boolean isSelected, boolean cellHasFocus) {
+                super.getListCellRendererComponent(list, value, index, isSelected, cellHasFocus);
+                if (value instanceof SavedHost) {
+                    SavedHost sh = (SavedHost) value;
+                    if (sh.getName() != null && !sh.getName().trim().isEmpty()) {
+                        setText(sh.getName() + " (" + sh.getHost() + ":" + sh.getPort() + ")");
+                    } else {
+                        setText(sh.getHost() + ":" + sh.getPort());
+                    }
+                } else if (value == null) {
+                    setText("(No saved connections)");
+                }
+                return this;
+            }
+        });
+        refreshSavedHostsBox();
         acGbc.gridx = 1;
-        autoConnectPanel.add(hostField, acGbc);
-
-        JLabel portLabel = new JLabel("Port:");
-        acGbc.gridx = 2;
-        autoConnectPanel.add(portLabel, acGbc);
-
-        portField = new JTextField(String.valueOf(Settings.getAutoConnectPort()), 4);
-        acGbc.gridx = 3;
-        autoConnectPanel.add(portField, acGbc);
+        acGbc.fill = GridBagConstraints.HORIZONTAL;
+        autoConnectPanel.add(savedHostBox, acGbc);
 
         gbc.gridx = 0;
         gbc.gridy = 1;
@@ -658,6 +703,30 @@ public class SettingsDialog extends JDialog {
         return panel;
     }
 
+    private void refreshSavedHostsBox() {
+        if (savedHostBox == null) return;
+        savedHostBox.removeAllItems();
+        List<SavedHost> savedHosts = HostStorage.getSavedHosts();
+        SavedHost currentAutoHost = HostStorage.getAutoConnectHost();
+        SavedHost toSelect = null;
+        for (SavedHost sh : savedHosts) {
+            savedHostBox.addItem(sh);
+            if (currentAutoHost != null && Objects.equals(sh.getId(), currentAutoHost.getId())) {
+                toSelect = sh;
+            }
+        }
+        if (toSelect != null) {
+            savedHostBox.setSelectedItem(toSelect);
+            savedHostBox.setEnabled(true);
+        } else if (!savedHosts.isEmpty()) {
+            savedHostBox.setSelectedIndex(0);
+            savedHostBox.setEnabled(true);
+        } else {
+            savedHostBox.addItem(null);
+            savedHostBox.setEnabled(false);
+        }
+    }
+
     private JPanel createEntryAssistPanel() {
         JPanel panel = new JPanel();
         panel.setLayout(new BoxLayout(panel, BoxLayout.Y_AXIS));
@@ -1187,11 +1256,32 @@ public class SettingsDialog extends JDialog {
                 if (behavior != null) {
                     Settings.setStartupBehavior(behavior);
                 }
-                if (behavior == Settings.StartupBehavior.AUTO_CONNECT && hostField != null && portField != null) {
-                    Settings.setAutoConnectHost(hostField.getText().trim());
-                    try {
-                        Settings.setAutoConnectPort(Integer.parseInt(portField.getText().trim()));
-                    } catch (NumberFormatException ignored) {
+                if (behavior == Settings.StartupBehavior.AUTO_CONNECT && savedHostBox != null) {
+                    Object sel = savedHostBox.getSelectedItem();
+                    if (sel instanceof SavedHost) {
+                        SavedHost selected = (SavedHost) sel;
+                        List<SavedHost> hosts = HostStorage.getSavedHosts();
+                        for (SavedHost h : hosts) {
+                            h.setAutoConnect(Objects.equals(h.getId(), selected.getId()));
+                        }
+                        HostStorage.saveAll(hosts);
+                        Settings.setAutoConnectHost(selected.getHost());
+                        Settings.setAutoConnectPort(selected.getPort());
+                        Settings.setAutoConnectTls(selected.isUseTls());
+                        Settings.setAutoConnectVerifyCert(selected.isTlsVerifyCert());
+                        Settings.setAutoConnectTn3270e(selected.isTn3270e());
+                    }
+                } else if (behavior != Settings.StartupBehavior.AUTO_CONNECT) {
+                    List<SavedHost> hosts = HostStorage.getSavedHosts();
+                    boolean modified = false;
+                    for (SavedHost h : hosts) {
+                        if (h.isAutoConnect()) {
+                            h.setAutoConnect(false);
+                            modified = true;
+                        }
+                    }
+                    if (modified) {
+                        HostStorage.saveAll(hosts);
                     }
                 }
             }
@@ -1371,12 +1461,7 @@ public class SettingsDialog extends JDialog {
                 autoConnectPanel.setVisible(startupBehaviorBox.getSelectedItem() == Settings.StartupBehavior.AUTO_CONNECT);
             }
         }
-        if (hostField != null) {
-            hostField.setText(Settings.getAutoConnectHost());
-        }
-        if (portField != null) {
-            portField.setText(String.valueOf(Settings.getAutoConnectPort()));
-        }
+        refreshSavedHostsBox();
         if (autoReconnectCheck != null) {
             autoReconnectCheck.setSelected(Settings.getAutoConnectAutoReconnect());
         }
@@ -1456,7 +1541,7 @@ public class SettingsDialog extends JDialog {
 
     // ========== Import Config ==========
 
-    void importConfigFile(File file) throws IOException {
+    public void importConfigFile(File file) throws IOException {
         if (file == null || !file.exists()) {
             throw new FileNotFoundException("Config file not found: " + (file != null ? file.getAbsolutePath() : "null"));
         }
@@ -1494,6 +1579,102 @@ public class SettingsDialog extends JDialog {
         return btnExport;
     }
 
+    public JButton getBtnImportConnections() {
+        return btnImportConnections;
+    }
+
+    public JButton getBtnExportConnections() {
+        return btnExportConnections;
+    }
+
+    public JComboBox<SavedHost> getSavedHostBox() {
+        return savedHostBox;
+    }
+
+    // ========== Import / Export Connections ==========
+
+    public void importConnectionsFile(File file) throws IOException {
+        if (file == null || !file.exists()) {
+            throw new FileNotFoundException("Connections file not found: " + (file != null ? file.getAbsolutePath() : "null"));
+        }
+        HostStorage.importFromIniFile(file);
+        refreshSavedHostsBox();
+        SavedHost autoHost = HostStorage.getAutoConnectHost();
+        if (autoHost != null) {
+            Settings.setAutoConnectHost(autoHost.getHost());
+            Settings.setAutoConnectPort(autoHost.getPort());
+            Settings.setAutoConnectTls(autoHost.isUseTls());
+            Settings.setAutoConnectVerifyCert(autoHost.isTlsVerifyCert());
+            Settings.setAutoConnectTn3270e(autoHost.isTn3270e());
+        }
+        refreshFromSettings();
+    }
+
+    public void exportConnectionsFile(File file) throws IOException {
+        if (file == null) {
+            throw new IllegalArgumentException("Target file cannot be null");
+        }
+        HostStorage.exportToIniFile(file);
+    }
+
+    private void importConnections() {
+        JFileChooser fc = new JFileChooser();
+        fc.setDialogTitle("Import Connections");
+        fc.setSelectedFile(new java.io.File("connections.ini"));
+        fc.setFileFilter(new javax.swing.filechooser.FileNameExtensionFilter("INI Files (*.ini)", "ini"));
+
+        int result = fc.showOpenDialog(this);
+        if (result == JFileChooser.APPROVE_OPTION) {
+            java.io.File file = fc.getSelectedFile();
+            try {
+                importConnectionsFile(file);
+                int count = HostStorage.getSavedHosts().size();
+                JOptionPane.showMessageDialog(this,
+                    "Connections imported successfully from:\n" + file.getAbsolutePath() + "\nTotal saved connections: " + count,
+                    "Import Successful", JOptionPane.INFORMATION_MESSAGE);
+            } catch (Exception ex) {
+                JOptionPane.showMessageDialog(this,
+                    "Import connections failed: " + ex.getMessage(),
+                    "Import Error", JOptionPane.ERROR_MESSAGE);
+            }
+        }
+    }
+
+    private void exportConnections() {
+        JFileChooser fc = new JFileChooser();
+        fc.setDialogTitle("Export Connections");
+        fc.setSelectedFile(new java.io.File("connections.ini"));
+        fc.setFileFilter(new javax.swing.filechooser.FileNameExtensionFilter("INI Files (*.ini)", "ini"));
+
+        int result = fc.showSaveDialog(this);
+        if (result == JFileChooser.APPROVE_OPTION) {
+            java.io.File file = fc.getSelectedFile();
+            // Ensure .ini extension
+            if (!file.getName().toLowerCase().endsWith(".ini")) {
+                file = new java.io.File(file.getAbsolutePath() + ".ini");
+            }
+
+            // Confirm overwrite
+            if (file.exists()) {
+                int confirm = JOptionPane.showConfirmDialog(this,
+                    "File already exists. Overwrite?", "Confirm Overwrite",
+                    JOptionPane.YES_NO_OPTION);
+                if (confirm != JOptionPane.YES_OPTION) return;
+            }
+
+            try {
+                exportConnectionsFile(file);
+                JOptionPane.showMessageDialog(this,
+                    "Connections exported to:\n" + file.getAbsolutePath(),
+                    "Export Successful", JOptionPane.INFORMATION_MESSAGE);
+            } catch (Exception ex) {
+                JOptionPane.showMessageDialog(this,
+                    "Export connections failed: " + ex.getMessage(),
+                    "Export Error", JOptionPane.ERROR_MESSAGE);
+            }
+        }
+    }
+
     // ========== Export Config ==========
 
     private void exportConfig() {

j3270/src/main/java/haus/nightmare/j3270/ui/StatusBar.java

@@ -357,9 +357,12 @@ public class StatusBar extends JPanel {
             wordWrapStatus.setText("");
         }
 
-        // Field status: Numeric vs Alphanumeric
+        // Field status: Numeric vs Alphanumeric vs DBCS
         if (state.isFullSession() && client.getScreenBuffer().isFormatted()) {
-            if (client.getOIA().isNumeric()) {
+            if (client.getOIA().isDBCS()) {
+                fieldTypeStatus.setText("DBCS");
+                fieldTypeStatus.setForeground(ThemeManager.getOiaStatusSysAvail(theme));
+            } else if (client.getOIA().isNumeric()) {
                 fieldTypeStatus.setText("NUM");
                 fieldTypeStatus.setForeground(ThemeManager.getOiaFgWarn(theme));
             } else {

j3270/src/main/java/haus/nightmare/j3270/ui/TerminalPanel.java

@@ -10,6 +10,12 @@ import javax.swing.*;
 import java.awt.*;
 import java.awt.datatransfer.*;
 import java.awt.event.*;
+import java.awt.event.InputMethodEvent;
+import java.awt.event.InputMethodListener;
+import java.awt.font.TextHitInfo;
+import java.awt.im.InputMethodRequests;
+import java.text.AttributedCharacterIterator;
+import java.text.CharacterIterator;
 
 import static haus.nightmare.lib3270j.protocol.DS3270Constants.*;
 
@@ -18,7 +24,8 @@ import static haus.nightmare.lib3270j.protocol.DS3270Constants.*;
  * Supports colors, bold, underline, reverse, blink, GOCA vector graphics,
  * programmed symbols, search highlighting, and all 3278/3279 attributes.
  */
-public class TerminalPanel extends JPanel implements java.awt.print.Printable {
+public class TerminalPanel extends JPanel implements java.awt.print.Printable, InputMethodListener, InputMethodRequests {
+
 
     private Telnet3270Client client;
 
@@ -29,7 +36,7 @@ public class TerminalPanel extends JPanel implements java.awt.print.Printable {
     int cellHeight;
     private int fontAscent;
     private int fontDescent;
-    private int padding = 4;
+    private int padding = 1;
     private int currentFontSize = 16;
 
     // Cursor state
@@ -96,6 +103,8 @@ public class TerminalPanel extends JPanel implements java.awt.print.Printable {
     private long lastGraphicsUpdateCount = -1;
     private java.awt.image.BufferedImage cachedGraphicsImage = null;
     private boolean resizeGuard = false;
+    private Integer targetModelRows = null;
+    private Integer targetModelCols = null;
     private StatusBar statusBar = null;
 
     // ========== Phase 25: Hotspots & Mouse Wheel ==========
@@ -134,13 +143,21 @@ public class TerminalPanel extends JPanel implements java.awt.print.Printable {
 
     /**
      * Compute the horizontal render offset to center the grid within the panel.
+     * The left bound of the window is the left bound of the left cells when constrained.
+     * Only if the window is too big is there blank space on the left, and it is equal
+     * to or less than the space on the right at all times.
      */
     int getRenderOffsetX() {
         int termCols = 80;
-        if (client != null) termCols = client.getScreenBuffer().getDisplayCols();
+        if (client != null && client.getScreenBuffer() != null) {
+            termCols = client.getScreenBuffer().getDisplayCols();
+        }
         int gridW = termCols * cellWidth;
         int extra = getWidth() - gridW;
-        return Math.max(padding, extra / 2);
+        if (extra > 0) {
+            return extra / 2;
+        }
+        return 0;
     }
 
     /**
@@ -148,10 +165,15 @@ public class TerminalPanel extends JPanel implements java.awt.print.Printable {
      */
     int getRenderOffsetY() {
         int termRows = 24;
-        if (client != null) termRows = client.getScreenBuffer().getDisplayRows();
+        if (client != null && client.getScreenBuffer() != null) {
+            termRows = client.getScreenBuffer().getDisplayRows();
+        }
         int gridH = termRows * cellHeight;
         int extra = getHeight() - gridH;
-        return Math.max(padding, extra / 2);
+        if (extra > 0) {
+            return extra / 2;
+        }
+        return 0;
     }
 
     // Default Host color mapping aligned 1:1 with IBM Host On-Demand ColorRemapModel3270
@@ -201,6 +223,10 @@ public class TerminalPanel extends JPanel implements java.awt.print.Printable {
         String cStyle = haus.nightmare.j3270.config.Settings.getCursorStyle();
         cursorStyle = "UNDERLINE".equalsIgnoreCase(cStyle) ? CursorStyle.UNDERLINE : CursorStyle.BLOCK;
 
+        enableInputMethods(true);
+        addInputMethodListener(this);
+
+
         // Handle mouse clicks to position cursor, selection, and grab focus
         MouseAdapter mouseHandler = new MouseAdapter() {
             @Override
@@ -210,11 +236,15 @@ public class TerminalPanel extends JPanel implements java.awt.print.Printable {
                 boolean wasPanelUnfocused = !hasFocus();
                 isActivationClick = wasWindowInactive || wasPanelUnfocused;
 
-                if (wasWindowInactive) {
+                if (win != null && wasWindowInactive) {
                     win.toFront();
-                    win.requestFocus();
                 }
                 requestFocus();
+                SwingUtilities.invokeLater(() -> {
+                    if (!hasFocus()) {
+                        requestFocus();
+                    }
+                });
 
                 // Right-click context menu
                 if (SwingUtilities.isRightMouseButton(e)) {
@@ -407,6 +437,9 @@ public class TerminalPanel extends JPanel implements java.awt.print.Printable {
 
             @Override
             public void mouseReleased(MouseEvent e) {
+                if (!hasFocus()) {
+                    requestFocus();
+                }
                 if (isDragging) {
                     isDragging = false;
                     if (activeDragHandle != DragHandle.NONE) {
@@ -700,6 +733,14 @@ public class TerminalPanel extends JPanel implements java.awt.print.Printable {
         repaint();
     }
 
+    public void select(int startRow, int startCol, int endRow, int endCol) {
+        selectionStartRow = startRow;
+        selectionStartCol = startCol;
+        selectionEndRow = endRow;
+        selectionEndCol = endCol;
+        repaint();
+    }
+
     public boolean hasSelection() {
         return selectionStartRow >= 0 && selectionEndRow >= 0 &&
                !(selectionStartRow == selectionEndRow && selectionStartCol == selectionEndCol);
@@ -725,13 +766,25 @@ public class TerminalPanel extends JPanel implements java.awt.print.Printable {
                 for (int c = c1; c <= c2; c++) {
                     int baddr = r * cols + c;
                     ExtendedAttribute ea = sb.getCell(baddr);
+                    if (ea.isFieldAttribute()) {
+                        line.append(' ');
+                    } else if (ea.db == ExtendedAttribute.DB_RIGHT) {
+                        if (c > c1) {
+                            continue; // Character already added by DB_LEFT
+                        } else {
+                            line.append(' ');
+                        }
+                    } else if (ea.db == ExtendedAttribute.DB_SO || ea.db == ExtendedAttribute.DB_SI) {
+                        line.append(' ');
+                    } else {
                         char ch = ea.ucs4;
-                    if (ea.isFieldAttribute() || ch <= 0x20 || ch == 0xFF) {
+                        if (ch <= 0x20 || ch == 0xFF) {
                             line.append(' ');
                         } else {
                             line.append(ch);
                         }
                     }
+                }
                 // Trim trailing whitespace on copied lines per HoD CutPasteOptions
                 int end = line.length();
                 while (end > 0 && line.charAt(end - 1) == ' ') {
@@ -767,13 +820,25 @@ public class TerminalPanel extends JPanel implements java.awt.print.Printable {
                     prevRow = curRow;
                 }
                 ExtendedAttribute ea = sb.getCell(addr);
+                if (ea.isFieldAttribute()) {
+                    line.append(' ');
+                } else if (ea.db == ExtendedAttribute.DB_RIGHT) {
+                    if (addr > startAddr) {
+                        continue; // Character already added by DB_LEFT
+                    } else {
+                        line.append(' ');
+                    }
+                } else if (ea.db == ExtendedAttribute.DB_SO || ea.db == ExtendedAttribute.DB_SI) {
+                    line.append(' ');
+                } else {
                     char ch = ea.ucs4;
-                if (ea.isFieldAttribute() || ch <= 0x20 || ch == 0xFF) {
+                    if (ch <= 0x20 || ch == 0xFF) {
                         line.append(' ');
                     } else {
                         line.append(ch);
                     }
                 }
+            }
             int end = line.length();
             while (end > 0 && line.charAt(end - 1) == ' ') {
                 end--;
@@ -1017,6 +1082,33 @@ public class TerminalPanel extends JPanel implements java.awt.print.Printable {
     }
 
 
+    public void packForModel(int modelRows, int modelCols) {
+        if (isDisplayable() && !SwingUtilities.isEventDispatchThread()) {
+            SwingUtilities.invokeLater(() -> packForModel(modelRows, modelCols));
+            return;
+        }
+        resizeGuard = true;
+        updateCellSize();
+        this.targetModelRows = modelRows;
+        this.targetModelCols = modelCols;
+        revalidate();
+        Container top = getTopLevelAncestor();
+        if (top instanceof java.awt.Window) {
+            java.awt.Window win = (java.awt.Window) top;
+            if (win instanceof java.awt.Frame) {
+                if ((((java.awt.Frame) win).getExtendedState() & java.awt.Frame.MAXIMIZED_BOTH) == 0) {
+                    win.pack();
+                }
+            } else {
+                win.pack();
+            }
+        }
+        this.targetModelRows = null;
+        this.targetModelCols = null;
+        repaint();
+        SwingUtilities.invokeLater(() -> resizeGuard = false);
+    }
+
     public void guardedPack() {
         if (isDisplayable() && !SwingUtilities.isEventDispatchThread()) {
             SwingUtilities.invokeLater(this::guardedPack);
@@ -1025,12 +1117,35 @@ public class TerminalPanel extends JPanel implements java.awt.print.Printable {
         resizeGuard = true;
         revalidate();
         Container top = getTopLevelAncestor();
-        if (top instanceof java.awt.Frame) {
-            if ((((java.awt.Frame) top).getExtendedState() & java.awt.Frame.MAXIMIZED_BOTH) == 0) {
-                ((java.awt.Window) top).pack();
+        if (top instanceof java.awt.Window) {
+            java.awt.Window win = (java.awt.Window) top;
+            if (win.isShowing()) {
+                int termCols = 80;
+                int termRows = 24;
+                if (client != null && client.getScreenBuffer() != null) {
+                    termCols = client.getScreenBuffer().getDisplayCols();
+                    termRows = client.getScreenBuffer().getDisplayRows();
+                }
+                int gridW = termCols * cellWidth;
+                int gridH = termRows * cellHeight;
+                Dimension winSize = win.getSize();
+                Dimension winPref = win.getPreferredSize();
+                boolean tooSmall = winSize.width < winPref.width || winSize.height < winPref.height
+                        || (getWidth() > 0 && getWidth() < gridW)
+                        || (getHeight() > 0 && getHeight() < gridH);
+                if (tooSmall) {
+                    repaint();
+                    SwingUtilities.invokeLater(() -> resizeGuard = false);
+                    return;
+                }
+            }
+            if (win instanceof java.awt.Frame) {
+                if ((((java.awt.Frame) win).getExtendedState() & java.awt.Frame.MAXIMIZED_BOTH) == 0) {
+                    win.pack();
+                }
+            } else {
+                win.pack();
             }
-        } else if (top instanceof java.awt.Window) {
-            ((java.awt.Window) top).pack();
         }
         SwingUtilities.invokeLater(() -> resizeGuard = false);
     }
@@ -1873,7 +1988,11 @@ public class TerminalPanel extends JPanel implements java.awt.print.Printable {
 
     @Override
     public Dimension getPreferredSize() {
-        if (client != null) {
+        if (targetModelRows != null && targetModelCols != null) {
+            return new Dimension(targetModelCols * cellWidth + padding * 2,
+                    targetModelRows * cellHeight + padding * 2);
+        }
+        if (client != null && client.getScreenBuffer() != null) {
             ScreenBuffer sb = client.getScreenBuffer();
             int displayCols = sb.getDisplayCols();
             int displayRows = sb.getDisplayRows();
@@ -2030,13 +2149,16 @@ public class TerminalPanel extends JPanel implements java.awt.print.Printable {
                     continue;
                 }
 
+                byte tr = ea.tr != 0 ? ea.tr : (currentFieldEa != null ? currentFieldEa.tr : 0);
+                boolean isOpaque = ((tr & 0xFF) == XAT_OPAQUE);
+
                 if (reverse) {
                     Color tmp = fgColor;
                     fgColor = (rawBg == 0) ? this.bgColor : bgColor;
                     bgColor = tmp;
                     g2.setColor(bgColor);
                     g2.fillRect(x, y, cellWidth, cellHeight);
-                } else if (bgIsExplicit || !bgColor.equals(this.bgColor)) {
+                } else if (isOpaque || bgIsExplicit || !bgColor.equals(this.bgColor)) {
                     g2.setColor(bgColor);
                     g2.fillRect(x, y, cellWidth, cellHeight);
                 }
@@ -2051,7 +2173,7 @@ public class TerminalPanel extends JPanel implements java.awt.print.Printable {
                 if (cs >= 0x40 && client.getProgramSymbolManager() != null && !suppressGlyph) {
                     haus.nightmare.lib3270j.graphics.ProgramSymbolSet.SymbolSlot slot = client.getProgramSymbolManager().getSymbol(cs, ea.ec & 0xFF);
                     if (slot != null) {
-                        int symBg = (bgIsExplicit || reverse) ? bgColor.getRGB() : 0;
+                        int symBg = (bgIsExplicit || reverse || isOpaque) ? bgColor.getRGB() : 0;
                         haus.nightmare.lib3270j.graphics.PixelBuffer symPb = slot.getScaledPixelBuffer(cellWidth, cellHeight, fgColor.getRGB(), symBg);
                         java.awt.image.BufferedImage img = AwtPixelBufferBridge.toBufferedImage(symPb);
                         if (img != null) {
@@ -2061,7 +2183,8 @@ public class TerminalPanel extends JPanel implements java.awt.print.Printable {
                     }
                 }
 
-                if (!drawnAsPs && !suppressGlyph) {
+                if (!drawnAsPs && !suppressGlyph && ea.db != ExtendedAttribute.DB_RIGHT
+                        && ea.db != ExtendedAttribute.DB_SO && ea.db != ExtendedAttribute.DB_SI) {
                     char ch = ea.ucs4;
                     if (ch > 0x20 && ch != 0xFF) {
                         Font f = bold ? boldTerminalFont : terminalFont;
@@ -2200,11 +2323,17 @@ public class TerminalPanel extends JPanel implements java.awt.print.Printable {
             boolean isUnderline = (cursorStyle == CursorStyle.UNDERLINE) ||
                                   (client.getInputProcessor() != null && client.getInputProcessor().isInsertMode());
             g2.setColor(CURSOR_COLOR);
+            ExtendedAttribute curEa = (curAddr >= 0 && curAddr < sb.getSize()) ? sb.getDisplayCell(curAddr) : null;
+            boolean isDbcs = curEa != null && (curEa.db == ExtendedAttribute.DB_LEFT || curEa.db == ExtendedAttribute.DB_RIGHT);
+            int cWidth = isDbcs ? (cellWidth * 2) : cellWidth;
+            if (isDbcs && curEa.db == ExtendedAttribute.DB_RIGHT && curCol > 0) {
+                cx -= cellWidth;
+            }
             if (isUnderline) {
                 int ulH = Math.max(2, cellHeight / 6);
-                g2.fillRect(cx, cy + cellHeight - ulH, cellWidth, ulH);
+                g2.fillRect(cx, cy + cellHeight - ulH, cWidth, ulH);
             } else {
-                g2.fillRect(cx, cy, cellWidth, cellHeight);
+                g2.fillRect(cx, cy, cWidth, cellHeight);
             }
         }
     }
@@ -2393,4 +2522,90 @@ public class TerminalPanel extends JPanel implements java.awt.print.Printable {
         paint(g2d);
         return PAGE_EXISTS;
     }
+
+    // =========================================================================
+    // Java Input Method Framework (IMF / IME) Support
+    // =========================================================================
+
+    @Override
+    public InputMethodRequests getInputMethodRequests() {
+        return this;
     }
+
+    @Override
+    public void inputMethodTextChanged(InputMethodEvent event) {
+        if (client == null || !client.getConnectionState().isFullSession()) {
+            event.consume();
+            return;
+        }
+        AttributedCharacterIterator text = event.getText();
+        if (text != null) {
+            int committedCount = event.getCommittedCharacterCount();
+            char c = text.first();
+            for (int i = 0; i < committedCount && c != CharacterIterator.DONE; i++) {
+                client.typeCharacter(c);
+                c = text.next();
+            }
+            refreshScreen();
+        }
+        event.consume();
+    }
+
+    @Override
+    public void caretPositionChanged(InputMethodEvent event) {
+        // No-op
+    }
+
+    @Override
+    public Rectangle getTextLocation(TextHitInfo offset) {
+        Point p;
+        try {
+            p = getLocationOnScreen();
+        } catch (IllegalComponentStateException e) {
+            p = new Point(0, 0);
+        }
+        int curRow = 0, curCol = 0;
+        if (client != null && client.getScreenBuffer() != null) {
+            int cols = client.getScreenBuffer().getCols();
+            int curAddr = client.getScreenBuffer().getDisplayCursorAddress();
+            if (cols > 0) {
+                curRow = curAddr / cols;
+                curCol = curAddr % cols;
+            }
+        }
+        int cx = p.x + getRenderOffsetX() + curCol * cellWidth;
+        int cy = p.y + getRenderOffsetY() + curRow * cellHeight;
+        return new Rectangle(cx, cy, cellWidth, cellHeight);
+    }
+
+    @Override
+    public TextHitInfo getLocationOffset(int x, int y) {
+        return TextHitInfo.leading(0);
+    }
+
+    @Override
+    public int getInsertPositionOffset() {
+        return 0;
+    }
+
+    @Override
+    public AttributedCharacterIterator getCommittedText(int beginIndex, int endIndex, AttributedCharacterIterator.Attribute[] attributes) {
+        return null;
+    }
+
+    @Override
+    public int getCommittedTextLength() {
+        return 0;
+    }
+
+    @Override
+    public AttributedCharacterIterator cancelLatestCommittedText(AttributedCharacterIterator.Attribute[] attributes) {
+        return null;
+    }
+
+    @Override
+    public AttributedCharacterIterator getSelectedText(AttributedCharacterIterator.Attribute[] attributes) {
+        return null;
+    }
+}
+

j3270/src/test/java/haus/nightmare/j3270/ConnectionConflictTest.java

@@ -0,0 +1,297 @@
+package haus.nightmare.j3270;
+
+import haus.nightmare.j3270.ui.ConnectChoiceDialog;
+import haus.nightmare.j3270.ui.ThemeManager;
+import haus.nightmare.lib3270j.ConnectionConfig;
+import haus.nightmare.lib3270j.Telnet3270Client;
+import haus.nightmare.lib3270j.TerminalModel;
+import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+
+import javax.swing.*;
+import java.awt.*;
+import java.awt.event.KeyEvent;
+import java.util.ArrayList;
+import java.util.List;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+public class ConnectionConflictTest {
+
+    private final List<J3270App> createdApps = new ArrayList<>();
+
+    @BeforeEach
+    public void setUp() {
+        for (J3270App app : new ArrayList<>(J3270App.getOpenWindows())) {
+            try {
+                app.dispose();
+            } catch (Exception ignored) {}
+        }
+    }
+
+    @AfterEach
+    public void tearDown() {
+        for (J3270App app : createdApps) {
+            try {
+                app.dispose();
+            } catch (Exception ignored) {}
+        }
+        for (J3270App app : new ArrayList<>(J3270App.getOpenWindows())) {
+            try {
+                app.dispose();
+            } catch (Exception ignored) {}
+        }
+    }
+
+    private J3270App createApp() {
+        try {
+            J3270App app = new J3270App();
+            createdApps.add(app);
+            return app;
+        } catch (HeadlessException e) {
+            return null;
+        }
+    }
+
+    @Test
+    @DisplayName("ConnectChoiceDialog components, styling, and action results")
+    public void testConnectChoiceDialogComponents() {
+        try {
+            ConnectChoiceDialog dialog = new ConnectChoiceDialog(null, "mvs.corp.local:23");
+            assertEquals("Active Connection", dialog.getTitle());
+            assertNotNull(dialog.getNewWindowButton());
+            assertNotNull(dialog.getAbortButton());
+            assertNotNull(dialog.getCancelButton());
+            assertEquals("New Window", dialog.getNewWindowButton().getText());
+            assertEquals("Abort Current Connection", dialog.getAbortButton().getText());
+            assertEquals("Cancel", dialog.getCancelButton().getText());
+
+            assertTrue(dialog.getLine1().getText().contains("mvs.corp.local:23"));
+            assertTrue(dialog.getLine2().getText().contains("new window"));
+            assertTrue(dialog.getLine2().getText().contains("abort"));
+
+            // Test button click choices
+            dialog.getNewWindowButton().doClick();
+            assertEquals(ConnectChoiceDialog.Choice.NEW_WINDOW, dialog.getChoice());
+
+            ConnectChoiceDialog dialog2 = new ConnectChoiceDialog(null, "cms.test:992");
+            dialog2.getAbortButton().doClick();
+            assertEquals(ConnectChoiceDialog.Choice.ABORT_CURRENT, dialog2.getChoice());
+
+            ConnectChoiceDialog dialog3 = new ConnectChoiceDialog(null, "cics.test:23");
+            dialog3.getCancelButton().doClick();
+            assertEquals(ConnectChoiceDialog.Choice.CANCEL, dialog3.getChoice());
+        } catch (HeadlessException ignored) {
+            // Expected in headless CI environments without X11
+        }
+    }
+
+    @Test
+    @DisplayName("When connected, Connect with NEW_WINDOW choice opens in a new window and preserves current connection")
+    public void testConnectChoiceNewWindow() {
+        J3270App app = createApp();
+        if (app == null) return;
+
+        ConnectionConfig config1 = new ConnectionConfig("host1.test", 23, TerminalModel.IBM_3278_2);
+        config1.setSavedProfileName("Host 1");
+        app.connect(config1, false);
+
+        assertTrue(app.getConnectedTarget().contains("host1.test") || app.getConnectedTarget().contains("Host 1"));
+
+        // Configure handler to return NEW_WINDOW
+        boolean[] handlerCalled = new boolean[]{false};
+        app.setConnectChoiceHandler((owner, target) -> {
+            handlerCalled[0] = true;
+            assertTrue(target.contains("host1.test") || target.contains("Host 1"));
+            return ConnectChoiceDialog.Choice.NEW_WINDOW;
+        });
+
+        int initialWindows = J3270App.getOpenWindows().size();
+
+        ConnectionConfig config2 = new ConnectionConfig("host2.test", 23, TerminalModel.IBM_3278_2);
+        config2.setSavedProfileName("Host 2");
+        app.connect(config2, true);
+
+        // Handler was invoked
+        assertTrue(handlerCalled[0], "Connect choice handler must be called when already connected");
+
+        // A new window was opened
+        assertEquals(initialWindows + 1, J3270App.getOpenWindows().size(),
+                "A new window should have been added to openWindows");
+
+        // Original app remains on config1
+        assertEquals("host1.test", app.getClient().getConfig().getHost());
+
+        // Find the new window
+        J3270App newWindow = null;
+        for (J3270App w : J3270App.getOpenWindows()) {
+            if (w != app) {
+                newWindow = w;
+                createdApps.add(w);
+                break;
+            }
+        }
+        assertNotNull(newWindow, "New window must exist");
+        assertNotNull(newWindow.getClient(), "New window should have a client");
+        assertEquals("host2.test", newWindow.getClient().getConfig().getHost(),
+                "New window must be connected to host2.test");
+    }
+
+    @Test
+    @DisplayName("When connected, Connect with ABORT_CURRENT choice aborts existing connection and connects in same window")
+    public void testConnectChoiceAbortCurrent() {
+        J3270App app = createApp();
+        if (app == null) return;
+
+        ConnectionConfig config1 = new ConnectionConfig("host1.test", 23, TerminalModel.IBM_3278_2);
+        app.connect(config1, false);
+
+        int initialWindows = J3270App.getOpenWindows().size();
+
+        boolean[] handlerCalled = new boolean[]{false};
+        app.setConnectChoiceHandler((owner, target) -> {
+            handlerCalled[0] = true;
+            return ConnectChoiceDialog.Choice.ABORT_CURRENT;
+        });
+
+        ConnectionConfig config2 = new ConnectionConfig("host2.test", 23, TerminalModel.IBM_3278_2);
+        app.connect(config2, true);
+
+        assertTrue(handlerCalled[0], "Connect choice handler must be called");
+        assertEquals(initialWindows, J3270App.getOpenWindows().size(),
+                "No new window should be created when choosing ABORT_CURRENT");
+        assertEquals("host2.test", app.getClient().getConfig().getHost(),
+                "Same window should now be connected to host2.test");
+    }
+
+    @Test
+    @DisplayName("When connected, Connect with CANCEL choice keeps existing connection and creates no new window")
+    public void testConnectChoiceCancel() {
+        J3270App app = createApp();
+        if (app == null) return;
+
+        ConnectionConfig config1 = new ConnectionConfig("host1.test", 23, TerminalModel.IBM_3278_2);
+        app.connect(config1, false);
+
+        int initialWindows = J3270App.getOpenWindows().size();
+
+        boolean[] handlerCalled = new boolean[]{false};
+        app.setConnectChoiceHandler((owner, target) -> {
+            handlerCalled[0] = true;
+            return ConnectChoiceDialog.Choice.CANCEL;
+        });
+
+        ConnectionConfig config2 = new ConnectionConfig("host2.test", 23, TerminalModel.IBM_3278_2);
+        app.connect(config2, true);
+
+        assertTrue(handlerCalled[0], "Connect choice handler must be called");
+        assertEquals(initialWindows, J3270App.getOpenWindows().size(),
+                "No new window should be created when choosing CANCEL");
+        assertEquals("host1.test", app.getClient().getConfig().getHost(),
+                "Existing window must remain connected to host1.test");
+    }
+
+    @Test
+    @DisplayName("File menu contains Close Window item with VK_W accelerator")
+    public void testCloseWindowMenuItem() {
+        J3270App app = createApp();
+        if (app == null) return;
+
+        JMenuBar mb = app.getJMenuBar();
+        assertNotNull(mb);
+        JMenu fileMenu = null;
+        for (int i = 0; i < mb.getMenuCount(); i++) {
+            if ("File".equals(mb.getMenu(i).getText())) {
+                fileMenu = mb.getMenu(i);
+                break;
+            }
+        }
+        assertNotNull(fileMenu, "File menu must exist");
+
+        JMenuItem closeWindowItem = null;
+        for (int i = 0; i < fileMenu.getItemCount(); i++) {
+            JMenuItem item = fileMenu.getItem(i);
+            if (item != null && "Close Window".equals(item.getText())) {
+                closeWindowItem = item;
+                break;
+            }
+        }
+        assertNotNull(closeWindowItem, "File menu must contain Close Window item");
+        KeyStroke ks = closeWindowItem.getAccelerator();
+        assertNotNull(ks, "Close Window item must have an accelerator");
+        assertEquals(KeyEvent.VK_W, ks.getKeyCode());
+    }
+
+    @Test
+    @DisplayName("Closing one window when multiple windows are open leaves remaining window open")
+    public void testMultiWindowCloseIndependent() {
+        J3270App app1 = createApp();
+        if (app1 == null) return;
+
+        J3270App app2 = createApp();
+        if (app2 == null) return;
+
+        assertTrue(J3270App.getOpenWindows().contains(app1));
+        assertTrue(J3270App.getOpenWindows().contains(app2));
+        assertEquals(2, J3270App.getOpenWindows().size());
+
+        // Close app1
+        app1.closeWindow();
+
+        assertFalse(J3270App.getOpenWindows().contains(app1), "app1 should be removed from open windows");
+        assertTrue(J3270App.getOpenWindows().contains(app2), "app2 should remain open");
+        assertEquals(1, J3270App.getOpenWindows().size());
+    }
+
+    @Test
+    @DisplayName("Abort current connection cleanly tears down old client and connects new client in same window")
+    public void testAbortCurrentConnectionGracefullyDisconnects() throws Exception {
+        J3270App app = createApp();
+        if (app == null) return;
+
+        ConnectionConfig config1 = new ConnectionConfig("host1.test", 23, TerminalModel.IBM_3278_2);
+        app.connect(config1, false);
+
+        Telnet3270Client oldClient = app.getClient();
+        assertNotNull(oldClient);
+
+        app.setConnectChoiceHandler((owner, target) -> ConnectChoiceDialog.Choice.ABORT_CURRENT);
+
+        ConnectionConfig config2 = new ConnectionConfig("host2.test", 23, TerminalModel.IBM_3278_2);
+        app.connect(config2, true);
+
+        // Client on app is immediately replaced with new client
+        Telnet3270Client newClient = app.getClient();
+        assertNotNull(newClient);
+        assertNotSame(oldClient, newClient);
+        assertEquals("host2.test", newClient.getConfig().getHost());
+
+        // Old client should be disconnected
+        Thread.sleep(100);
+        assertEquals(haus.nightmare.lib3270j.ConnectionState.NOT_CONNECTED, oldClient.getConnectionState());
+        assertFalse(oldClient.isConnected());
+    }
+
+    @Test
+    @DisplayName("Explicit app.disconnect() tears down client and clears UI state")
+    public void testExplicitDisconnectResetsUI() throws Exception {
+        J3270App app = createApp();
+        if (app == null) return;
+
+        ConnectionConfig config = new ConnectionConfig("host1.test", 23, TerminalModel.IBM_3278_2);
+        app.connect(config, false);
+
+        Telnet3270Client client = app.getClient();
+        assertNotNull(client);
+
+        app.disconnect();
+
+        assertNull(app.getClient());
+        assertFalse(app.isConnected());
+        Thread.sleep(100);
+        assertEquals(haus.nightmare.lib3270j.ConnectionState.NOT_CONNECTED, client.getConnectionState());
+        assertFalse(client.isConnected());
+    }
+}

j3270/src/test/java/haus/nightmare/j3270/LoggingConfigurationTest.java

@@ -85,7 +85,8 @@ public class LoggingConfigurationTest {
         assertEquals(Level.ALL, Logger.getLogger("haus.nightmare.lib3270j").getLevel());
 
         File logFile = new File("j3270.log");
-        assertTrue(logFile.exists(), "j3270.log should be created when debug is enabled");
+        File logFile1 = new File("j3270.log.1");
+        assertTrue(logFile.exists() || logFile1.exists(), "j3270.log should be created when debug is enabled");
 
         // Clean up
         J3270App.configureLogging(false);

j3270/src/test/java/haus/nightmare/j3270/ft/ConnectionHostTypeConfigTest.java

@@ -0,0 +1,271 @@
+package haus.nightmare.j3270.ft;
+
+import haus.nightmare.j3270.J3270App;
+import haus.nightmare.j3270.config.Settings;
+import haus.nightmare.j3270.storage.HostStorage;
+import haus.nightmare.j3270.storage.SavedHost;
+import haus.nightmare.j3270.ui.ConnectDialog;
+import haus.nightmare.lib3270j.ConnectionConfig;
+import haus.nightmare.lib3270j.Telnet3270Client;
+import haus.nightmare.lib3270j.ft.FTConfig;
+import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+
+import javax.swing.*;
+import java.awt.Frame;
+import java.awt.HeadlessException;
+import java.io.File;
+import java.io.PrintWriter;
+import java.util.List;
+import java.util.UUID;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+public class ConnectionHostTypeConfigTest {
+
+    private List<SavedHost> originalSavedHosts;
+    private String originalDefaultHostType;
+
+    @BeforeEach
+    public void setUp() {
+        FileTransferDialog.resetSessionState();
+        originalSavedHosts = HostStorage.getSavedHosts();
+        originalDefaultHostType = Settings.getDefaultHostType();
+        HostStorage.clearAll();
+    }
+
+    @AfterEach
+    public void tearDown() {
+        FileTransferDialog.resetSessionState();
+        HostStorage.clearAll();
+        if (originalSavedHosts != null) {
+            HostStorage.saveAll(originalSavedHosts);
+        }
+        Settings.setDefaultHostType(originalDefaultHostType);
+    }
+
+    @Test
+    @DisplayName("SavedHost converts to ConnectionConfig preserving hostType and saved connection metadata")
+    public void testSavedHostToConnectionConfigPreservesHostType() {
+        SavedHost cmsHost = new SavedHost(
+                "cms-uuid-1", "VM/CMS System", "vm370.corp.local", 23, 4, 62, 160, "",
+                false, "CMS", false, true, true, "BOTH", "037",
+                "NONE", "", 0, "", ""
+        );
+
+        ConnectionConfig cfgCms = cmsHost.toConnectionConfig();
+        assertTrue(cfgCms.isSavedConnection(), "Config from SavedHost must be marked as saved connection");
+        assertEquals("cms-uuid-1", cfgCms.getSavedProfileId());
+        assertEquals("VM/CMS System", cfgCms.getSavedProfileName());
+        assertEquals("CMS", cfgCms.getHostType());
+        assertEquals(FTConfig.HostType.CMS, cfgCms.getFtHostType());
+
+        SavedHost cicsHost = new SavedHost(
+                "cics-uuid-2", "CICS Gateway", "cics.corp.local", 23, 2, 24, 80, "LU1",
+                false, "CICS", false, true, true, "BOTH", "037",
+                "NONE", "", 0, "", ""
+        );
+
+        ConnectionConfig cfgCics = cicsHost.toConnectionConfig();
+        assertTrue(cfgCics.isSavedConnection());
+        assertEquals("CICS", cfgCics.getHostType());
+        assertEquals(FTConfig.HostType.CICS, cfgCics.getFtHostType());
+
+        SavedHost tsoHost = new SavedHost(
+                "tso-uuid-3", "MVS TSO", "tso.corp.local", 23, 4, 43, 80, "",
+                false, "TSO", false, true, true, "BOTH", "037",
+                "NONE", "", 0, "", ""
+        );
+
+        ConnectionConfig cfgTso = tsoHost.toConnectionConfig();
+        assertTrue(cfgTso.isSavedConnection());
+        assertEquals("TSO", cfgTso.getHostType());
+        assertEquals(FTConfig.HostType.TSO, cfgTso.getFtHostType());
+    }
+
+    @Test
+    @DisplayName("FileTransferDialog preselects CMS when using a saved connection configured as CMS")
+    public void testFileTransferDialogPrefillsFromSavedConnectionCms() {
+        ConnectionConfig config = new ConnectionConfig("vm.example.com", 23);
+        config.setSavedConnection(true);
+        config.setSavedProfileId("vm-1");
+        config.setSavedProfileName("VM370");
+        config.setHostType("CMS");
+
+        Telnet3270Client client = new Telnet3270Client(config);
+        FileTransfer ft = new FileTransfer(client, null);
+
+        try {
+            FileTransferDialog dialog = new FileTransferDialog(null, ft);
+            assertEquals(FTConfig.HostType.CMS, dialog.getHostTypeCombo().getSelectedItem(),
+                    "FileTransferDialog must preselect CMS when saved connection is configured as CMS");
+            dialog.dispose();
+        } catch (HeadlessException ignored) {
+        }
+    }
+
+    @Test
+    @DisplayName("FileTransferDialog preselects CICS when using a saved connection configured as CICS")
+    public void testFileTransferDialogPrefillsFromSavedConnectionCics() {
+        ConnectionConfig config = new ConnectionConfig("cics.example.com", 23);
+        config.setSavedConnection(true);
+        config.setSavedProfileId("cics-1");
+        config.setSavedProfileName("CICS Region");
+        config.setHostType("CICS");
+
+        Telnet3270Client client = new Telnet3270Client(config);
+        FileTransfer ft = new FileTransfer(client, null);
+
+        try {
+            FileTransferDialog dialog = new FileTransferDialog(null, ft);
+            assertEquals(FTConfig.HostType.CICS, dialog.getHostTypeCombo().getSelectedItem(),
+                    "FileTransferDialog must preselect CICS when saved connection is configured as CICS");
+            dialog.dispose();
+        } catch (HeadlessException ignored) {
+        }
+    }
+
+    @Test
+    @DisplayName("FileTransferDialog overrides stale prior transfer state with configured host type from saved connection")
+    public void testFileTransferDialogOverridesOldTransferStateWhenSavedConnectionUsed() {
+        // Simulate a prior transfer performed on a TSO system
+        FileTransferDialog.TransferSessionState oldState = new FileTransferDialog.TransferSessionState();
+        oldState.hostType = FTConfig.HostType.TSO;
+        oldState.localFile = "test.txt";
+        oldState.hostFile = "USER.DATA";
+        FileTransferDialog.setLastTransferState(oldState);
+
+        // Now connect to a CMS saved connection
+        ConnectionConfig cmsConfig = new ConnectionConfig("vm.corp.internal", 23);
+        cmsConfig.setSavedConnection(true);
+        cmsConfig.setSavedProfileName("VM Prod");
+        cmsConfig.setHostType("CMS");
+
+        Telnet3270Client client = new Telnet3270Client(cmsConfig);
+        FileTransfer ft = new FileTransfer(client, null);
+
+        try {
+            FileTransferDialog dialog = new FileTransferDialog(null, ft);
+            assertEquals(FTConfig.HostType.CMS, dialog.getHostTypeCombo().getSelectedItem(),
+                    "FileTransferDialog must use the configured host type (CMS) of the saved connection rather than prior session's TSO");
+            dialog.dispose();
+        } catch (HeadlessException ignored) {
+        }
+    }
+
+    @Test
+    @DisplayName("ConnectDialog allows host type configuration and saves it to profile")
+    public void testConnectDialogHostTypeConfigurationAndProfile() {
+        try {
+            ConnectDialog dialog = new ConnectDialog((Frame) null);
+            assertNotNull(dialog.getHostTypeCombo(), "ConnectDialog must provide a Host Type combo box");
+            assertEquals("TSO", dialog.getSelectedHostType());
+
+            // Switch to CMS
+            dialog.setInitialHostType("CMS");
+            assertEquals("CMS", dialog.getSelectedHostType());
+            assertEquals(FTConfig.HostType.CMS, dialog.getSelectedFtHostType());
+
+            // Switch to CICS
+            dialog.setInitialHostType("CICS");
+            assertEquals("CICS", dialog.getSelectedHostType());
+            assertEquals(FTConfig.HostType.CICS, dialog.getSelectedFtHostType());
+
+            // Loading a SavedHost profile updates host type in ConnectDialog
+            SavedHost cmsProfile = new SavedHost(
+                    "cms-prof-1", "CMS Dev", "cms.dev.local", 23, 4, 62, 160, "",
+                    false, "CMS", false, true, true, "BOTH", "037",
+                    "NONE", "", 0, "", ""
+            );
+            dialog.loadProfile(cmsProfile);
+            assertEquals("CMS", dialog.getSelectedHostType());
+
+            dialog.dispose();
+        } catch (HeadlessException ignored) {
+        }
+    }
+
+    @Test
+    @DisplayName("Settings persists and exports defaultHostType")
+    public void testSettingsDefaultHostTypePersistenceAndIni() throws Exception {
+        Settings.setDefaultHostType("CMS");
+        assertEquals("CMS", Settings.getDefaultHostType());
+
+        File tmpIni = File.createTempFile("j3270_test_cfg", ".ini");
+        tmpIni.deleteOnExit();
+
+        try (PrintWriter writer = new PrintWriter(tmpIni)) {
+            writer.println("[connection]");
+            writer.println("hostType = CICS");
+        }
+
+        Settings.loadFromIniFile(tmpIni.getAbsolutePath());
+        assertEquals("CICS", Settings.getDefaultHostType());
+
+        // Test export
+        File exportFile = File.createTempFile("j3270_export", ".ini");
+        exportFile.deleteOnExit();
+        Settings.exportToIniFile(exportFile.getAbsolutePath());
+
+        String content = new String(java.nio.file.Files.readAllBytes(exportFile.toPath()));
+        assertTrue(content.contains("hostType = CICS"), "Exported INI must contain hostType = CICS");
+    }
+
+    @Test
+    @DisplayName("J3270App setConnectionHostType updates connection config and syncs with profile in HostStorage")
+    public void testSetConnectionHostTypeUpdatesActiveConnectionAndStorage() {
+        SavedHost saved = new SavedHost(
+                "saved-prof-1", "Prod CMS", "vm.prod", 23, 4, 62, 160, "",
+                false, "TSO", false, true, true, "BOTH", "037",
+                "NONE", "", 0, "", ""
+        );
+        HostStorage.saveHost(saved);
+
+        ConnectionConfig config = saved.toConnectionConfig();
+        assertEquals("TSO", config.getHostType());
+
+        try {
+            J3270App app = new J3270App();
+            try {
+                // Verify Connection menu exists in JMenuBar
+                JMenuBar mb = app.getJMenuBar();
+                assertNotNull(mb);
+                boolean hasConnectionMenu = false;
+                for (int i = 0; i < mb.getMenuCount(); i++) {
+                    JMenu m = mb.getMenu(i);
+                    if (m != null && "Connection".equals(m.getText())) {
+                        hasConnectionMenu = true;
+                        break;
+                    }
+                }
+                assertTrue(hasConnectionMenu, "JMenuBar must include a Connection menu");
+
+                // Simulate connecting with this config
+                app.connect(config);
+
+                // Change host type via setConnectionHostType
+                app.setConnectionHostType(FTConfig.HostType.CMS);
+                assertEquals(FTConfig.HostType.CMS, app.getClient().getConfig().getFtHostType());
+
+                // Profile in storage should also be updated
+                SavedHost reloaded = HostStorage.findById("saved-prof-1");
+                assertNotNull(reloaded);
+                assertEquals("CMS", reloaded.getHostType());
+            } finally {
+                app.dispose();
+            }
+        } catch (HeadlessException ignored) {
+            // In headless environments where JFrame cannot be initialized, test model updates directly
+            Telnet3270Client client = new Telnet3270Client(config);
+            client.getConfig().setFtHostType(FTConfig.HostType.CMS);
+            saved.setHostType(FTConfig.HostType.CMS.name());
+            HostStorage.saveHost(saved);
+
+            SavedHost reloaded = HostStorage.findById("saved-prof-1");
+            assertNotNull(reloaded);
+            assertEquals("CMS", reloaded.getHostType());
+        }
+    }
+}

j3270/src/test/java/haus/nightmare/j3270/ft/FileTransferSessionAndCmsTest.java

@@ -1,6 +1,9 @@
 package haus.nightmare.j3270.ft;
 
+import haus.nightmare.j3270.ui.HostDirectoryDialog;
 import haus.nightmare.lib3270j.ft.FTConfig;
+import haus.nightmare.lib3270j.ft.dir.CMSDirectoryEntry;
+import haus.nightmare.lib3270j.ft.dir.TSODirectoryEntry;
 import org.junit.jupiter.api.AfterEach;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
@@ -99,4 +102,114 @@ public class FileTransferSessionAndCmsTest {
             // Headless environment; verified through state retention
         }
     }
+
+    @Test
+    public void testPdsSessionStatePersistence() {
+        FileTransferDialog.TransferSessionState state = new FileTransferDialog.TransferSessionState();
+        state.hostType = FTConfig.HostType.TSO;
+        state.isSend = true;
+        state.hostFile = "'USER.PDS.DATA'";
+        state.units = FTConfig.AllocationUnit.CYLINDERS;
+        state.space = "10,5";
+        state.dirBlocks = "20";
+
+        FileTransferDialog.setLastTransferState(state);
+
+        FileTransferDialog.TransferSessionState retrieved = FileTransferDialog.getLastTransferState();
+        assertNotNull(retrieved);
+        assertEquals(FTConfig.AllocationUnit.CYLINDERS, retrieved.units);
+        assertEquals("10,5", retrieved.space);
+        assertEquals("20", retrieved.dirBlocks);
+
+        try {
+            FileTransferDialog dialog = new FileTransferDialog(null, null);
+            assertEquals(FTConfig.AllocationUnit.CYLINDERS, dialog.getUnitsCombo().getSelectedItem());
+            assertEquals("10,5", dialog.getSpaceField().getText());
+            assertEquals("20", dialog.getDirField().getText());
+            dialog.dispose();
+        } catch (HeadlessException ignored) {
+        }
+    }
+
+    @Test
+    public void testHostDirectoryDialogStructureAndFilter() {
+        // Test default query resolution
+        assertEquals("* * A", haus.nightmare.j3270.ui.HostDirectoryDialog.resolveDefaultQuery(FTConfig.HostType.CMS, null));
+        assertEquals("* * A", haus.nightmare.j3270.ui.HostDirectoryDialog.resolveDefaultQuery(FTConfig.HostType.CMS, ""));
+        assertEquals("* * A", haus.nightmare.j3270.ui.HostDirectoryDialog.resolveDefaultQuery(FTConfig.HostType.CMS, "   "));
+        assertEquals("* * A", haus.nightmare.j3270.ui.HostDirectoryDialog.resolveDefaultQuery(FTConfig.HostType.CMS, "* * *"));
+        assertEquals("* * A", haus.nightmare.j3270.ui.HostDirectoryDialog.resolveDefaultQuery(FTConfig.HostType.CMS, "*"));
+        assertEquals("TEST EXEC", haus.nightmare.j3270.ui.HostDirectoryDialog.resolveDefaultQuery(FTConfig.HostType.CMS, "TEST EXEC"));
+
+        assertEquals("", haus.nightmare.j3270.ui.HostDirectoryDialog.resolveDefaultQuery(FTConfig.HostType.TSO, null));
+        assertEquals("", haus.nightmare.j3270.ui.HostDirectoryDialog.resolveDefaultQuery(FTConfig.HostType.TSO, ""));
+        assertEquals("'MY.DATASET'", haus.nightmare.j3270.ui.HostDirectoryDialog.resolveDefaultQuery(FTConfig.HostType.TSO, "'MY.DATASET'"));
+
+        // Test CMS filter formatting
+        assertEquals("* * A", haus.nightmare.j3270.ui.HostDirectoryDialog.formatCMSFilter(null));
+        assertEquals("* * A", haus.nightmare.j3270.ui.HostDirectoryDialog.formatCMSFilter(""));
+        assertEquals("* * A", haus.nightmare.j3270.ui.HostDirectoryDialog.formatCMSFilter("* * *"));
+        assertEquals("* * A", haus.nightmare.j3270.ui.HostDirectoryDialog.formatCMSFilter("*"));
+        assertEquals("TEST * A", haus.nightmare.j3270.ui.HostDirectoryDialog.formatCMSFilter("TEST"));
+        assertEquals("TEST EXEC A", haus.nightmare.j3270.ui.HostDirectoryDialog.formatCMSFilter("TEST EXEC"));
+        assertEquals("TEST EXEC B", haus.nightmare.j3270.ui.HostDirectoryDialog.formatCMSFilter("TEST EXEC B"));
+        assertEquals("TEST EXEC A", haus.nightmare.j3270.ui.HostDirectoryDialog.formatCMSFilter("TEST.EXEC"));
+
+        try {
+            haus.nightmare.j3270.ui.HostDirectoryDialog dialog =
+                new haus.nightmare.j3270.ui.HostDirectoryDialog(null, null, FTConfig.HostType.CMS, "");
+            assertNotNull(dialog);
+            assertFalse(dialog.isConfirmed());
+            assertNull(dialog.getSelectedHostFile());
+            assertEquals("* * A", dialog.getQueryField().getText());
+            dialog.dispose();
+
+            haus.nightmare.j3270.ui.HostDirectoryDialog dialog2 =
+                new haus.nightmare.j3270.ui.HostDirectoryDialog(null, null, FTConfig.HostType.CMS, "* * *");
+            assertEquals("* * A", dialog2.getQueryField().getText());
+            dialog2.dispose();
+
+            haus.nightmare.j3270.ui.HostDirectoryDialog dialog3 =
+                new haus.nightmare.j3270.ui.HostDirectoryDialog(null, null, FTConfig.HostType.CMS, "TEST EXEC");
+            assertEquals("TEST EXEC", dialog3.getQueryField().getText());
+            dialog3.dispose();
+        } catch (HeadlessException ignored) {
+        }
+    }
+
+    @Test
+    public void testMatchesFilterWildcards() {
+        CMSDirectoryEntry cmsA = new CMSDirectoryEntry("PROFILE", "EXEC", "A1");
+        CMSDirectoryEntry cmsB = new CMSDirectoryEntry("PROFILE", "EXEC", "B1");
+        CMSDirectoryEntry cmsSys = new CMSDirectoryEntry("SYSTEM", "CONFIG", "S2");
+
+        // * * A matches A disk files (A1, A0, etc.), excludes B and S
+        assertTrue(HostDirectoryDialog.matchesFilter(cmsA, "* * A"));
+        assertFalse(HostDirectoryDialog.matchesFilter(cmsB, "* * A"));
+        assertFalse(HostDirectoryDialog.matchesFilter(cmsSys, "* * A"));
+
+        // Blank, *, * * * matches all
+        assertTrue(HostDirectoryDialog.matchesFilter(cmsA, ""));
+        assertTrue(HostDirectoryDialog.matchesFilter(cmsA, "*"));
+        assertTrue(HostDirectoryDialog.matchesFilter(cmsB, "* * *"));
+        assertTrue(HostDirectoryDialog.matchesFilter(cmsSys, "* * *"));
+
+        // Two tokens (fn ft) and dot tokens
+        assertTrue(HostDirectoryDialog.matchesFilter(cmsA, "* EXEC"));
+        assertTrue(HostDirectoryDialog.matchesFilter(cmsA, "*.EXEC"));
+        assertTrue(HostDirectoryDialog.matchesFilter(cmsA, "PROFILE *"));
+        assertTrue(HostDirectoryDialog.matchesFilter(cmsA, "PROF*.*"));
+        assertFalse(HostDirectoryDialog.matchesFilter(cmsSys, "* EXEC"));
+
+        // TSO Wildcards
+        TSODirectoryEntry tso = new TSODirectoryEntry("TSOUSER.TEST.DATA");
+        assertTrue(HostDirectoryDialog.matchesFilter(tso, ""));
+        assertTrue(HostDirectoryDialog.matchesFilter(tso, "*"));
+        assertTrue(HostDirectoryDialog.matchesFilter(tso, "* * *"));
+        assertTrue(HostDirectoryDialog.matchesFilter(tso, "*.DATA"));
+        assertTrue(HostDirectoryDialog.matchesFilter(tso, "TEST"));
+        assertTrue(HostDirectoryDialog.matchesFilter(tso, "TSOUSER.*"));
+        assertTrue(HostDirectoryDialog.matchesFilter(tso, "'TSOUSER.TEST.*'"));
+        assertFalse(HostDirectoryDialog.matchesFilter(tso, "*.CNTL"));
+    }
 }

j3270/src/test/java/haus/nightmare/j3270/storage/ConnectionIniStorageTest.java

@@ -0,0 +1,342 @@
+package haus.nightmare.j3270.storage;
+
+import haus.nightmare.j3270.J3270App;
+import haus.nightmare.j3270.config.Settings;
+import haus.nightmare.j3270.ui.SettingsDialog;
+import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+
+import javax.swing.*;
+import java.awt.*;
+import java.io.File;
+import java.io.FileNotFoundException;
+import java.io.FileWriter;
+import java.io.IOException;
+import java.nio.file.Files;
+import java.util.ArrayList;
+import java.util.List;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+public class ConnectionIniStorageTest {
+
+    private List<SavedHost> originalSavedHosts;
+    private String origHost;
+    private int origPort;
+
+    @BeforeEach
+    public void setUp() {
+        originalSavedHosts = HostStorage.getSavedHosts();
+        origHost = Settings.getAutoConnectHost();
+        origPort = Settings.getAutoConnectPort();
+    }
+
+    @AfterEach
+    public void tearDown() {
+        if (originalSavedHosts != null) {
+            HostStorage.saveAll(originalSavedHosts);
+        } else {
+            HostStorage.clearAll();
+        }
+        Settings.setAutoConnectHost(origHost);
+        Settings.setAutoConnectPort(origPort);
+    }
+
+    @Test
+    @DisplayName("HostStorage exports to and loads from connections.ini with full fidelity")
+    public void testExportAndLoadConnectionsIniRoundtrip() throws IOException {
+        List<SavedHost> hosts = new ArrayList<>();
+        SavedHost h1 = new SavedHost("id-mainframe-1", "Production TSO", "mainframe.corp.com", 23, 4, 62, 160,
+                "LU01", true, "TSO", false, true, true, "BOTH", "037", "NONE", "", 0, "", "");
+        SavedHost h2 = new SavedHost("id-vm-2", "VM CMS Test", "vmcms.lab.net", 992, 2, 24, 80,
+                "LUCMS", false, "CMS", true, false, true, "GDDM", "1047", "SOCKS5", "10.0.0.1", 1080, "proxyuser", "proxypass");
+        hosts.add(h1);
+        hosts.add(h2);
+
+        File tmpIni = File.createTempFile("connections_test", ".ini");
+        tmpIni.deleteOnExit();
+
+        try {
+            HostStorage.exportToIniFile(tmpIni, hosts);
+
+            assertTrue(tmpIni.exists());
+            String content = new String(Files.readAllBytes(tmpIni.toPath()));
+            assertTrue(content.contains("[Production TSO]"), "Must contain section header [Production TSO]");
+            assertTrue(content.contains("[VM CMS Test]"), "Must contain section header [VM CMS Test]");
+            assertTrue(content.contains("host = mainframe.corp.com"));
+            assertTrue(content.contains("proxyHost = 10.0.0.1"));
+            assertTrue(content.contains("proxyType = SOCKS5"));
+
+            List<SavedHost> loaded = HostStorage.loadFromIniFile(tmpIni);
+            assertEquals(2, loaded.size(), "Should load 2 connections from INI");
+
+            SavedHost loaded1 = loaded.get(0);
+            assertEquals("id-mainframe-1", loaded1.getId());
+            assertEquals("Production TSO", loaded1.getName());
+            assertEquals("mainframe.corp.com", loaded1.getHost());
+            assertEquals(23, loaded1.getPort());
+            assertEquals(4, loaded1.getModel());
+            assertEquals(62, loaded1.getDynamicRows());
+            assertEquals(160, loaded1.getDynamicCols());
+            assertEquals("LU01", loaded1.getLuName());
+            assertTrue(loaded1.isAutoConnect());
+            assertEquals("TSO", loaded1.getHostType());
+            assertFalse(loaded1.isUseTls());
+            assertTrue(loaded1.isTlsVerifyCert());
+
+            SavedHost loaded2 = loaded.get(1);
+            assertEquals("id-vm-2", loaded2.getId());
+            assertEquals("VM CMS Test", loaded2.getName());
+            assertEquals("vmcms.lab.net", loaded2.getHost());
+            assertEquals(992, loaded2.getPort());
+            assertEquals(2, loaded2.getModel());
+            assertEquals(24, loaded2.getDynamicRows());
+            assertEquals(80, loaded2.getDynamicCols());
+            assertEquals("LUCMS", loaded2.getLuName());
+            assertFalse(loaded2.isAutoConnect());
+            assertEquals("CMS", loaded2.getHostType());
+            assertTrue(loaded2.isUseTls());
+            assertFalse(loaded2.isTlsVerifyCert());
+            assertEquals("SOCKS5", loaded2.getProxyType());
+            assertEquals("10.0.0.1", loaded2.getProxyHost());
+            assertEquals(1080, loaded2.getProxyPort());
+            assertEquals("proxyuser", loaded2.getProxyUsername());
+            assertEquals("proxypass", loaded2.getProxyPassword());
+        } finally {
+            if (tmpIni.exists()) tmpIni.delete();
+        }
+    }
+
+    @Test
+    @DisplayName("HostStorage importFromIniFile merges and updates existing hosts by name or id")
+    public void testImportFromIniFileMergesAndUpdates() throws IOException {
+        SavedHost initial = new SavedHost("id-100", "Mainframe Prod", "old.host.org", 23, 4, 62, 160,
+                "", false, "TSO", false, true, true, "BOTH", "037", "NONE", "", 0, "", "");
+        List<SavedHost> initList = new ArrayList<>();
+        initList.add(initial);
+        HostStorage.saveAll(initList);
+
+        File tmpIni = File.createTempFile("connections_merge", ".ini");
+        tmpIni.deleteOnExit();
+
+        try {
+            try (FileWriter w = new FileWriter(tmpIni)) {
+                // Update Mainframe Prod with new host address
+                w.write("[Mainframe Prod]\n");
+                w.write("id = id-100\n");
+                w.write("host = new.host.org\n");
+                w.write("port = 2323\n");
+                w.write("\n");
+                // Add a second connection
+                w.write("[Development CICS]\n");
+                w.write("host = cics.dev.org\n");
+                w.write("port = 992\n");
+                w.write("hostType = CICS\n");
+                w.write("useTls = true\n");
+            }
+
+            List<SavedHost> result = HostStorage.importFromIniFile(tmpIni);
+            assertEquals(2, result.size(), "Import should result in 2 saved hosts (1 updated, 1 added)");
+
+            SavedHost updated = HostStorage.findById("id-100");
+            assertNotNull(updated);
+            assertEquals("new.host.org", updated.getHost());
+            assertEquals(2323, updated.getPort());
+
+            SavedHost added = HostStorage.findByName("Development CICS");
+            assertNotNull(added);
+            assertEquals("cics.dev.org", added.getHost());
+            assertEquals(992, added.getPort());
+            assertEquals("CICS", added.getHostType());
+            assertTrue(added.isUseTls());
+        } finally {
+            if (tmpIni.exists()) tmpIni.delete();
+        }
+    }
+
+    @Test
+    @DisplayName("HostStorage parses INI section prefixes and aliases properly")
+    public void testImportHandlesMissingFieldsAndAliases() throws IOException {
+        File tmpIni = File.createTempFile("connections_alias", ".ini");
+        tmpIni.deleteOnExit();
+
+        try {
+            try (FileWriter w = new FileWriter(tmpIni)) {
+                w.write("[connection:Aliased Host]\n");
+                w.write("hostname = test.alias.net\n");
+                w.write("port = 1023\n");
+                w.write("terminalModel = 2\n");
+                w.write("type = CMS\n");
+                w.write("tls = true\n");
+                w.write("verifyCert = false\n");
+                w.write("charset = 1047\n");
+                w.write("rows = 24\n");
+                w.write("cols = 80\n");
+                w.write("lu = LUVM\n");
+            }
+
+            List<SavedHost> parsed = HostStorage.loadFromIniFile(tmpIni);
+            assertEquals(1, parsed.size());
+
+            SavedHost h = parsed.get(0);
+            assertEquals("Aliased Host", h.getName());
+            assertEquals("test.alias.net", h.getHost());
+            assertEquals(1023, h.getPort());
+            assertEquals(2, h.getModel());
+            assertEquals("CMS", h.getHostType());
+            assertTrue(h.isUseTls());
+            assertFalse(h.isTlsVerifyCert());
+            assertEquals("1047", h.getCodePage());
+            assertEquals(24, h.getDynamicRows());
+            assertEquals(80, h.getDynamicCols());
+            assertEquals("LUVM", h.getLuName());
+        } finally {
+            if (tmpIni.exists()) tmpIni.delete();
+        }
+    }
+
+    @Test
+    @DisplayName("SettingsDialog contains Import Connections and Export Connections buttons and is taller")
+    public void testSettingsDialogConnectionButtonsAndHeight() {
+        J3270App app;
+        try {
+            app = new J3270App();
+        } catch (HeadlessException e) {
+            return;
+        }
+
+        try {
+            SettingsDialog dialog = new SettingsDialog(app);
+
+            JButton btnImportConn = dialog.getBtnImportConnections();
+            JButton btnExportConn = dialog.getBtnExportConnections();
+
+            assertNotNull(btnImportConn, "Import Connections button must exist in SettingsDialog");
+            assertNotNull(btnExportConn, "Export Connections button must exist in SettingsDialog");
+
+            assertEquals("Import Connections...", btnImportConn.getText());
+            assertEquals("Export Connections...", btnExportConn.getText());
+
+            // Check window height: must be taller than previous 540 to accommodate extra buttons
+            assertTrue(dialog.getHeight() > 540,
+                    "Settings window height (" + dialog.getHeight() + ") must be taller than 540 to accommodate the extra buttons");
+
+            // Verify config buttons share container row1, and connection buttons share container row2
+            JButton btnImport = dialog.getBtnImport();
+            JButton btnExport = dialog.getBtnExport();
+            assertNotNull(btnImport);
+            assertNotNull(btnExport);
+
+            Container configRow = btnImport.getParent();
+            assertNotNull(configRow);
+            assertSame(configRow, btnExport.getParent(), "btnImport and btnExport must share the same parent row");
+
+            Container connRow = btnImportConn.getParent();
+            assertNotNull(connRow);
+            assertSame(connRow, btnExportConn.getParent(), "btnImportConn and btnExportConn must share the same parent row");
+
+            assertNotSame(configRow, connRow, "Connection buttons must be below and NOT in line with config buttons");
+
+            // Verify connRow is positioned below configRow in buttonPanel
+            Container buttonPanel = configRow.getParent();
+            assertNotNull(buttonPanel);
+            assertSame(buttonPanel, connRow.getParent(), "Both rows must be in buttonPanel");
+
+            int configRowIdx = -1;
+            int connRowIdx = -1;
+            Component[] rows = buttonPanel.getComponents();
+            for (int i = 0; i < rows.length; i++) {
+                if (rows[i] == configRow) configRowIdx = i;
+                if (rows[i] == connRow) connRowIdx = i;
+            }
+            assertTrue(configRowIdx >= 0, "configRow must be in buttonPanel");
+            assertTrue(connRowIdx >= 0, "connRow must be in buttonPanel");
+            assertTrue(connRowIdx > configRowIdx, "connRow must be below configRow in buttonPanel (" + connRowIdx + " > " + configRowIdx + ")");
+
+            dialog.dispose();
+            app.dispose();
+        } catch (HeadlessException ignored) {
+        }
+    }
+
+    @Test
+    @DisplayName("SettingsDialog importConnectionsFile updates savedHostBox and Settings")
+    public void testSettingsDialogImportConnectionsFileUpdatesDropdownAndSettings() throws IOException {
+        J3270App app;
+        try {
+            app = new J3270App();
+        } catch (HeadlessException e) {
+            return;
+        }
+
+        File tmpIni = File.createTempFile("settings_dialog_import_test", ".ini");
+        tmpIni.deleteOnExit();
+
+        try {
+            try (FileWriter w = new FileWriter(tmpIni)) {
+                w.write("[Auto Mainframe]\n");
+                w.write("host = auto.mainframe.org\n");
+                w.write("port = 992\n");
+                w.write("autoConnect = true\n");
+                w.write("useTls = true\n");
+            }
+
+            SettingsDialog dialog = new SettingsDialog(app);
+            dialog.importConnectionsFile(tmpIni);
+
+            // Check savedHostBox updated
+            JComboBox<SavedHost> box = dialog.getSavedHostBox();
+            assertNotNull(box);
+            assertTrue(box.getItemCount() >= 1);
+
+            SavedHost sel = (SavedHost) box.getSelectedItem();
+            assertNotNull(sel);
+            assertEquals("auto.mainframe.org", sel.getHost());
+            assertTrue(sel.isAutoConnect());
+
+            // Check Settings updated for autoConnect host
+            assertEquals("auto.mainframe.org", Settings.getAutoConnectHost());
+            assertEquals(992, Settings.getAutoConnectPort());
+            assertTrue(Settings.getAutoConnectTls());
+
+            // Test exportConnectionsFile
+            File exportTarget = File.createTempFile("settings_dialog_export_test", ".ini");
+            exportTarget.deleteOnExit();
+            dialog.exportConnectionsFile(exportTarget);
+            assertTrue(exportTarget.exists());
+            String exported = new String(Files.readAllBytes(exportTarget.toPath()));
+            assertTrue(exported.contains("auto.mainframe.org"));
+
+            dialog.dispose();
+            app.dispose();
+        } catch (HeadlessException ignored) {
+        } finally {
+            if (tmpIni.exists()) tmpIni.delete();
+        }
+    }
+
+    @Test
+    @DisplayName("SettingsDialog importConnectionsFile throws FileNotFoundException for nonexistent file")
+    public void testImportNonExistentConnectionsFileThrows() {
+        J3270App app;
+        try {
+            app = new J3270App();
+        } catch (HeadlessException e) {
+            return;
+        }
+
+        try {
+            SettingsDialog dialog = new SettingsDialog(app);
+            File nonExistent = new File("/path/to/nonexistent/connections_" + System.currentTimeMillis() + ".ini");
+            assertThrows(FileNotFoundException.class, () -> {
+                dialog.importConnectionsFile(nonExistent);
+            });
+
+            dialog.dispose();
+            app.dispose();
+        } catch (HeadlessException ignored) {
+        }
+    }
+}

j3270/src/test/java/haus/nightmare/j3270/ui/AutoConnectSettingsAndTerminalCenteringTest.java

@@ -0,0 +1,242 @@
+package haus.nightmare.j3270.ui;
+
+import haus.nightmare.j3270.J3270App;
+import haus.nightmare.j3270.config.Settings;
+import haus.nightmare.j3270.storage.HostStorage;
+import haus.nightmare.j3270.storage.SavedHost;
+import haus.nightmare.lib3270j.ConnectionConfig;
+import haus.nightmare.lib3270j.ConnectionState;
+import haus.nightmare.lib3270j.Telnet3270Client;
+import haus.nightmare.lib3270j.screen.ScreenBuffer;
+import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+
+import javax.swing.*;
+import java.awt.*;
+import java.lang.reflect.Field;
+import java.util.ArrayList;
+import java.util.List;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+public class AutoConnectSettingsAndTerminalCenteringTest {
+
+    private List<SavedHost> originalSavedHosts;
+    private Settings.StartupBehavior originalStartupBehavior;
+    private String originalAutoConnectHost;
+    private int originalAutoConnectPort;
+
+    @BeforeEach
+    public void setUp() {
+        originalSavedHosts = new ArrayList<>(HostStorage.getSavedHosts());
+        originalStartupBehavior = Settings.getStartupBehavior();
+        originalAutoConnectHost = Settings.getAutoConnectHost();
+        originalAutoConnectPort = Settings.getAutoConnectPort();
+    }
+
+    @AfterEach
+    public void tearDown() {
+        HostStorage.saveAll(originalSavedHosts);
+        Settings.setStartupBehavior(originalStartupBehavior);
+        Settings.setAutoConnectHost(originalAutoConnectHost);
+        Settings.setAutoConnectPort(originalAutoConnectPort);
+    }
+
+    @Test
+    @DisplayName("TerminalPanel centering: left bound is flush when constrained, centered with left <= right when too big")
+    public void testTerminalPanelCenteringLogic() {
+        TerminalPanel panel = new TerminalPanel();
+        panel.cellWidth = 10;
+        panel.cellHeight = 20;
+
+        Telnet3270Client client = new Telnet3270Client(new ConnectionConfig("localhost", 23));
+        client.getTelnetFSM().setConnectionState(ConnectionState.CONNECTED_3270);
+        ScreenBuffer sb = client.getScreenBuffer();
+        sb.erase(false);
+        panel.setClient(client);
+
+        int cols = sb.getDisplayCols(); // 80
+        int rows = sb.getDisplayRows(); // 24
+        int gridW = cols * panel.cellWidth; // 800
+        int gridH = rows * panel.cellHeight; // 480
+
+        // 1. Panel is smaller than grid: left bound must be 0 (flush left cells), vertical must be 0
+        panel.setSize(gridW - 100, gridH - 50);
+        assertEquals(0, panel.getRenderOffsetX(), "Left bound should be 0 when window width is constrained");
+        assertEquals(0, panel.getRenderOffsetY(), "Top bound should be 0 when window height is constrained");
+
+        // 2. Panel exactly matches grid: offset must be 0
+        panel.setSize(gridW, gridH);
+        assertEquals(0, panel.getRenderOffsetX(), "Offset X must be 0 when width exactly matches grid");
+        assertEquals(0, panel.getRenderOffsetY(), "Offset Y must be 0 when height exactly matches grid");
+
+        // 3. Panel is larger with odd extra (extra = 7)
+        panel.setSize(gridW + 7, gridH + 11);
+        int ox = panel.getRenderOffsetX();
+        int leftSpace = ox;
+        int rightSpace = (gridW + 7) - (ox + gridW);
+        assertTrue(leftSpace <= rightSpace, "Left blank space (" + leftSpace + ") must be <= right space (" + rightSpace + ")");
+        assertEquals(3, leftSpace);
+        assertEquals(4, rightSpace);
+
+        int oy = panel.getRenderOffsetY();
+        int topSpace = oy;
+        int bottomSpace = (gridH + 11) - (oy + gridH);
+        assertTrue(topSpace <= bottomSpace, "Top space must be <= bottom space");
+        assertEquals(5, topSpace);
+        assertEquals(6, bottomSpace);
+
+        // 4. Panel is larger with even extra (extra = 6)
+        panel.setSize(gridW + 6, gridH + 8);
+        assertEquals(3, panel.getRenderOffsetX());
+        assertEquals(4, panel.getRenderOffsetY());
+
+        panel.dispose();
+    }
+
+    @Test
+    @DisplayName("guardedPack does not resize window when window is too small")
+    public void testGuardedPackDoesNotResizeWhenTooSmall() {
+        try {
+            JFrame frame = new JFrame();
+            TerminalPanel panel = new TerminalPanel();
+            panel.cellWidth = 10;
+            panel.cellHeight = 20;
+
+            Telnet3270Client client = new Telnet3270Client(new ConnectionConfig("localhost", 23));
+            client.getTelnetFSM().setConnectionState(ConnectionState.CONNECTED_3270);
+            panel.setClient(client);
+
+            frame.getContentPane().add(panel);
+            frame.setSize(400, 300);
+            frame.addNotify(); // makes frame displayable
+
+            // Set size explicitly smaller than preferred size (800+ x 480+)
+            frame.setSize(400, 300);
+            Dimension sizeBefore = frame.getSize();
+
+            // Run guardedPack
+            panel.guardedPack();
+
+            // Window should not have expanded
+            Dimension sizeAfter = frame.getSize();
+            assertEquals(sizeBefore.width, sizeAfter.width, "Window width should NOT be enlarged when too small");
+            assertEquals(sizeBefore.height, sizeAfter.height, "Window height should NOT be enlarged when too small");
+
+            frame.dispose();
+            panel.dispose();
+        } catch (HeadlessException ignored) {
+            // Environment without X display
+        }
+    }
+
+    @Test
+    @DisplayName("SettingsDialog Startup & Auto-Connect presents saved connections dropdown and updates auto-connect host")
+    public void testSettingsDialogSavedConnectionsDropdown() throws Exception {
+        SavedHost host1 = new SavedHost("id-test-1", "Host Alpha", "alpha.mainframe.test", 23, 2, 24, 80, "LU1", true, "TSO", false, true, true, "BOTH", "037", "NONE", "", 0, "", "");
+        SavedHost host2 = new SavedHost("id-test-2", "Host Beta", "beta.mainframe.test", 992, 4, 43, 80, "LU2", false, "VM", true, false, true, "BOTH", "037", "NONE", "", 0, "", "");
+
+        List<SavedHost> testHosts = new ArrayList<>();
+        testHosts.add(host1);
+        testHosts.add(host2);
+        HostStorage.saveAll(testHosts);
+        Settings.setStartupBehavior(Settings.StartupBehavior.AUTO_CONNECT);
+
+        J3270App app;
+        try {
+            app = new J3270App();
+        } catch (HeadlessException e) {
+            return;
+        }
+
+        try {
+            SettingsDialog dialog = new SettingsDialog(app);
+
+            JComboBox<SavedHost> combo = dialog.getSavedHostBox();
+            assertNotNull(combo, "savedHostBox should not be null");
+            assertEquals(2, combo.getItemCount(), "Dropdown should contain all saved hosts");
+
+            // Host Alpha was autoConnect=true, so it should be initially selected
+            SavedHost initialSel = (SavedHost) combo.getSelectedItem();
+            assertNotNull(initialSel);
+            assertEquals("id-test-1", initialSel.getId());
+
+            // Switch to Host Beta
+            combo.setSelectedIndex(1);
+
+            // Trigger applySettings via reflection
+            java.lang.reflect.Method applyMethod = SettingsDialog.class.getDeclaredMethod("applySettings");
+            applyMethod.setAccessible(true);
+            applyMethod.invoke(dialog);
+
+            // Verify Host Beta is now the auto-connect host
+            SavedHost auto = HostStorage.getAutoConnectHost();
+            assertNotNull(auto, "Auto-connect host should exist");
+            assertEquals("id-test-2", auto.getId());
+            assertEquals("Host Beta", auto.getName());
+            assertEquals("beta.mainframe.test", auto.getHost());
+            assertEquals(992, auto.getPort());
+
+            SavedHost loadedAlpha = HostStorage.findById("id-test-1");
+            assertNotNull(loadedAlpha);
+            assertFalse(loadedAlpha.isAutoConnect(), "Host Alpha should no longer have autoConnect = true");
+
+            // Verify Settings autoConnectHost/Port synchronized
+            assertEquals("beta.mainframe.test", Settings.getAutoConnectHost());
+            assertEquals(992, Settings.getAutoConnectPort());
+
+            // Switch startup behavior to SHOW_CONNECT and apply
+            Field sbField = SettingsDialog.class.getDeclaredField("startupBehaviorBox");
+            sbField.setAccessible(true);
+            @SuppressWarnings("unchecked")
+            JComboBox<Settings.StartupBehavior> sbBox = (JComboBox<Settings.StartupBehavior>) sbField.get(dialog);
+            sbBox.setSelectedItem(Settings.StartupBehavior.SHOW_CONNECT);
+
+            applyMethod.invoke(dialog);
+            assertNull(HostStorage.getAutoConnectHost(), "When startup behavior is SHOW_CONNECT, auto-connect host should be cleared");
+
+            dialog.dispose();
+            app.dispose();
+        } finally {
+            HostStorage.saveAll(originalSavedHosts);
+        }
+    }
+
+    @Test
+    @DisplayName("Window size is adjusted once on connect for selected model and left untouched on onScreenSizeChanged")
+    public void testWindowSizedOnceForModelAndNotOnScreenSizeChanged() {
+        try {
+            JFrame frame = new JFrame();
+            TerminalPanel panel = new TerminalPanel();
+            panel.cellWidth = 10;
+            panel.cellHeight = 20;
+
+            frame.getContentPane().add(panel);
+            frame.addNotify();
+
+            // Pack for Model 4 (43 rows, 80 cols)
+            panel.packForModel(43, 80);
+            Dimension model4Size = frame.getSize();
+            assertTrue(model4Size.height >= 43 * 20, "Height should accommodate 43 rows");
+            assertTrue(model4Size.width >= 80 * 10, "Width should accommodate 80 cols");
+
+            // Pack for Model 5 (27 rows, 132 cols)
+            panel.packForModel(27, 132);
+            Dimension model5Size = frame.getSize();
+            assertTrue(model5Size.width >= 132 * 10, "Width should accommodate 132 cols");
+
+            // Set custom size and verify guardedPack leaves the window alone
+            frame.setSize(600, 400);
+            Dimension fixedSize = frame.getSize();
+
+            panel.guardedPack();
+            assertEquals(fixedSize.width, frame.getWidth());
+            assertEquals(fixedSize.height, frame.getHeight());
+
+            frame.dispose();
+            panel.dispose();
+        } catch (HeadlessException ignored) {}
+    }
+}

j3270/src/test/java/haus/nightmare/j3270/ui/DBCSInputAndClipboardTest.java

@@ -0,0 +1,153 @@
+package haus.nightmare.j3270.ui;
+
+import haus.nightmare.lib3270j.ConnectionConfig;
+import haus.nightmare.lib3270j.ConnectionState;
+import haus.nightmare.lib3270j.Telnet3270Client;
+import haus.nightmare.lib3270j.input.InputProcessor;
+import haus.nightmare.lib3270j.screen.ExtendedAttribute;
+import haus.nightmare.lib3270j.screen.ScreenBuffer;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+
+import java.awt.*;
+import java.awt.event.InputMethodEvent;
+import java.text.AttributedString;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+public class DBCSInputAndClipboardTest {
+
+    @Test
+    @DisplayName("Clipboard selection skips DB_RIGHT cells to avoid duplicating wide characters")
+    public void testDBCSClipboardCopyNoDoubling() {
+        TerminalPanel panel = new TerminalPanel();
+        panel.setSize(800, 600);
+
+        ConnectionConfig config = new ConnectionConfig("localhost", 23);
+        config.setCodePage("930");
+        Telnet3270Client client = new Telnet3270Client(config);
+        client.getTelnetFSM().setConnectionState(ConnectionState.CONNECTED_3270);
+
+        ScreenBuffer sb = client.getScreenBuffer();
+        sb.erase(false);
+
+        // Put a 2-cell DBCS character at cells 0 and 1, followed by SBCS 'A' at cell 2
+        ExtendedAttribute cell0 = sb.getCell(0);
+        cell0.db = ExtendedAttribute.DB_LEFT;
+        cell0.ucs4 = '\u3000';
+
+        ExtendedAttribute cell1 = sb.getCell(1);
+        cell1.db = ExtendedAttribute.DB_RIGHT;
+        cell1.ucs4 = '\u3000';
+
+        ExtendedAttribute cell2 = sb.getCell(2);
+        cell2.db = ExtendedAttribute.DB_NONE;
+        cell2.ucs4 = 'A';
+
+        panel.setClient(client);
+
+        // Stream selection covering cells 0..2 (row 0, col 0..2)
+        panel.select(0, 0, 0, 2);
+        String selected = panel.getSelectedText();
+
+        assertEquals("\u3000A", selected, "Stream selection must not duplicate the DBCS character");
+    }
+
+    @Test
+    @DisplayName("Block selection skips DB_RIGHT cells to avoid duplicating wide characters")
+    public void testDBCSBlockSelectionNoDoubling() {
+        TerminalPanel panel = new TerminalPanel();
+        panel.setSize(800, 600);
+        panel.setBlockSelectMode(true);
+
+        ConnectionConfig config = new ConnectionConfig("localhost", 23);
+        config.setCodePage("930");
+        Telnet3270Client client = new Telnet3270Client(config);
+        client.getTelnetFSM().setConnectionState(ConnectionState.CONNECTED_3270);
+
+        ScreenBuffer sb = client.getScreenBuffer();
+        sb.erase(false);
+
+        // Put a 2-cell DBCS character at cells 0 and 1, followed by SBCS 'B' at cell 2
+        ExtendedAttribute cell0 = sb.getCell(0);
+        cell0.db = ExtendedAttribute.DB_LEFT;
+        cell0.ucs4 = '\u3000';
+
+        ExtendedAttribute cell1 = sb.getCell(1);
+        cell1.db = ExtendedAttribute.DB_RIGHT;
+        cell1.ucs4 = '\u3000';
+
+        ExtendedAttribute cell2 = sb.getCell(2);
+        cell2.db = ExtendedAttribute.DB_NONE;
+        cell2.ucs4 = 'B';
+
+        panel.setClient(client);
+
+        panel.select(0, 0, 0, 2);
+        String selected = panel.getSelectedText();
+
+        assertEquals("\u3000B", selected, "Block selection must not duplicate the DBCS character");
+    }
+
+    @Test
+    @DisplayName("InputMethodRequests returns cursor bounds and processes committed text")
+    public void testDBCSInputMethodRequestsAndEvents() {
+        TerminalPanel panel = new TerminalPanel();
+        panel.setSize(800, 600);
+
+        ConnectionConfig config = new ConnectionConfig("localhost", 23);
+        config.setCodePage("930");
+        Telnet3270Client client = new Telnet3270Client(config);
+        client.getTelnetFSM().setConnectionState(ConnectionState.CONNECTED_3270);
+
+        panel.setClient(client);
+
+        assertNotNull(panel.getInputMethodRequests(), "getInputMethodRequests must return this");
+
+        Rectangle loc = panel.getTextLocation(null);
+        assertNotNull(loc, "Text location must not be null");
+        assertTrue(loc.width > 0, "Cursor width must be positive");
+        assertTrue(loc.height > 0, "Cursor height must be positive");
+
+        // Simulate committed IME text '\u3000'
+        AttributedString as = new AttributedString("\u3000");
+        InputMethodEvent imeEvent = new InputMethodEvent(panel, InputMethodEvent.INPUT_METHOD_TEXT_CHANGED,
+                as.getIterator(), 1, null, null);
+        panel.inputMethodTextChanged(imeEvent);
+
+        ScreenBuffer sb = client.getScreenBuffer();
+        assertEquals(ExtendedAttribute.DB_LEFT, sb.getCell(0).db);
+        assertEquals('\u3000', sb.getCell(0).ucs4);
+        assertEquals(ExtendedAttribute.DB_RIGHT, sb.getCell(1).db);
+        assertEquals('\u3000', sb.getCell(1).ucs4);
+        assertEquals(2, sb.getCursorAddress(), "Cursor should advance by 2 after typing 2-cell DBCS");
+    }
+
+    @Test
+    @DisplayName("InputProcessor backspace over DBCS character deletes both cells")
+    public void testInputProcessorDBCSTypingAndBackspace() {
+        ConnectionConfig config = new ConnectionConfig("localhost", 23);
+        config.setCodePage("930");
+        Telnet3270Client client = new Telnet3270Client(config);
+        client.getTelnetFSM().setConnectionState(ConnectionState.CONNECTED_3270);
+
+        InputProcessor input = client.getInputProcessor();
+        ScreenBuffer sb = client.getScreenBuffer();
+        sb.erase(false);
+        sb.setCursorAddress(0);
+
+        // Type DBCS character
+        input.typeCharacter('\u3000');
+        assertEquals(2, sb.getCursorAddress());
+        assertEquals(ExtendedAttribute.DB_LEFT, sb.getCell(0).db);
+        assertEquals(ExtendedAttribute.DB_RIGHT, sb.getCell(1).db);
+
+        // Backspace over DBCS character
+        input.backspace();
+        assertEquals(0, sb.getCursorAddress(), "Cursor should back up 2 cells");
+        assertEquals(0, sb.getCell(0).ucs4, "Cell 0 should be deleted (null)");
+        assertEquals(0, sb.getCell(1).ucs4, "Cell 1 should be deleted (null)");
+        assertEquals(ExtendedAttribute.DB_NONE, sb.getCell(0).db);
+        assertEquals(ExtendedAttribute.DB_NONE, sb.getCell(1).db);
+    }
+}

j3270/src/test/java/haus/nightmare/j3270/ui/TerminalPanelSelectionTest.java

@@ -98,4 +98,25 @@ public class TerminalPanelSelectionTest {
             // Handled gracefully in headless environments
         }
     }
+
+    @Test
+    @DisplayName("Mouse press and release on TerminalPanel requests focus")
+    public void testTerminalPanelMousePressRequestsFocus() {
+        try {
+            TerminalPanel panel = new TerminalPanel();
+            assertTrue(panel.isFocusable());
+
+            MouseListener[] mouseListeners = panel.getMouseListeners();
+            assertTrue(mouseListeners.length > 0);
+
+            MouseEvent pressEvent = new MouseEvent(panel, MouseEvent.MOUSE_PRESSED, System.currentTimeMillis(),
+                    0, 50, 50, 1, false, MouseEvent.BUTTON1);
+            mouseListeners[0].mousePressed(pressEvent);
+
+            MouseEvent releaseEvent = new MouseEvent(panel, MouseEvent.MOUSE_RELEASED, System.currentTimeMillis(),
+                    0, 50, 50, 1, false, MouseEvent.BUTTON1);
+            mouseListeners[0].mouseReleased(releaseEvent);
+        } catch (HeadlessException ignored) {
+        }
+    }
 }

lib3270j/src/main/java/com/ibm/eNetwork/ECL/ECLField.java

@@ -131,7 +131,18 @@ public class ECLField extends haus.nightmare.lib3270j.ecl.ECLField implements EC
         return delegate != null ? (short) (delegate.getAttribute() & 0xFF) : 0;
     }
 
-    public short getAttribute() { return GetAttribute(); }
+    public boolean IsDBCS() {
+        return delegate != null && delegate.isDBCS();
+    }
+
+    public boolean isDBCS() { return IsDBCS(); }
+
+    public boolean IsDBCSOnly() {
+        return delegate != null && delegate.isDBCSOnly();
+    }
+
+    public boolean isDBCSOnly() { return IsDBCSOnly(); }
 
     public haus.nightmare.lib3270j.ecl.ECLField getDelegate() { return delegate; }
 }
+

lib3270j/src/main/java/com/ibm/eNetwork/ECL/ECLPS.java

@@ -511,4 +511,61 @@ public class ECLPS implements ECLConstants, Serializable, Cloneable {
     public int GetScreen(char[] buffer, int len, int row, int col, int length, int plane) {
         return delegate.GetScreen(buffer, len, row, col, length, plane);
     }
+
+    // ========== DBCS Character Status ==========
+
+    public boolean IsDBCSChar(int pos) {
+        return delegate != null && delegate.IsDBCSChar(pos);
     }
+
+    public boolean isDBCSChar(int pos) { return IsDBCSChar(pos); }
+
+    public boolean IsDBCSChar(int row, int col) {
+        return delegate != null && delegate.IsDBCSChar(row, col);
+    }
+
+    public boolean isDBCSChar(int row, int col) { return IsDBCSChar(row, col); }
+
+    public boolean IsDBCS1stChar(int pos) {
+        return delegate != null && delegate.IsDBCS1stChar(pos);
+    }
+
+    public boolean isDBCS1stChar(int pos) { return IsDBCS1stChar(pos); }
+
+    public boolean IsDBCS1stChar(int row, int col) {
+        return delegate != null && delegate.IsDBCS1stChar(row, col);
+    }
+
+    public boolean isDBCS1stChar(int row, int col) { return IsDBCS1stChar(row, col); }
+
+    public boolean IsDBCS2ndChar(int pos) {
+        return delegate != null && delegate.IsDBCS2ndChar(pos);
+    }
+
+    public boolean isDBCS2ndChar(int pos) { return IsDBCS2ndChar(pos); }
+
+    public boolean IsDBCS2ndChar(int row, int col) {
+        return delegate != null && delegate.IsDBCS2ndChar(row, col);
+    }
+
+    public boolean isDBCS2ndChar(int row, int col) { return IsDBCS2ndChar(row, col); }
+
+    public boolean IsSOChar(int pos) {
+        return delegate != null && delegate.IsSOChar(pos);
+    }
+
+    public boolean isSOChar(int pos) { return IsSOChar(pos); }
+
+    public boolean IsSIChar(int pos) {
+        return delegate != null && delegate.IsSIChar(pos);
+    }
+
+    public boolean isSIChar(int pos) { return IsSIChar(pos); }
+
+    public boolean IsSOSIChar(int pos) {
+        return delegate != null && delegate.IsSOSIChar(pos);
+    }
+
+    public boolean isSOSIChar(int pos) { return IsSOSIChar(pos); }
+}
+

lib3270j/src/main/java/haus/nightmare/lib3270j/ConnectionConfig.java

@@ -69,6 +69,12 @@ public class ConnectionConfig {
     private int reconnectMaxRetries = 5;
     private int tcpUserTimeoutMs = 0;
 
+    // Host operating system type (TSO, CMS, CICS)
+    private String hostType = "TSO";
+    private boolean savedConnection = false;
+    private String savedProfileId = null;
+    private String savedProfileName = null;
+
     public ConnectionConfig() {}
 
     public ConnectionConfig(String host, int port) {
@@ -312,6 +318,51 @@ public class ConnectionConfig {
     public int getTcpUserTimeoutMs() { return tcpUserTimeoutMs; }
     public void setTcpUserTimeoutMs(int timeoutMs) { this.tcpUserTimeoutMs = Math.max(0, timeoutMs); }
 
+    public String getHostType() {
+        return hostType != null ? hostType : "TSO";
+    }
+
+    public void setHostType(String hostType) {
+        this.hostType = (hostType != null && !hostType.trim().isEmpty()) ? hostType.trim().toUpperCase() : "TSO";
+    }
+
+    public haus.nightmare.lib3270j.ft.FTConfig.HostType getFtHostType() {
+        if (hostType != null) {
+            try {
+                return haus.nightmare.lib3270j.ft.FTConfig.HostType.valueOf(hostType.trim().toUpperCase());
+            } catch (Exception ignored) {}
+        }
+        return haus.nightmare.lib3270j.ft.FTConfig.HostType.TSO;
+    }
+
+    public void setFtHostType(haus.nightmare.lib3270j.ft.FTConfig.HostType ftHostType) {
+        this.hostType = (ftHostType != null) ? ftHostType.name() : "TSO";
+    }
+
+    public boolean isSavedConnection() {
+        return savedConnection;
+    }
+
+    public void setSavedConnection(boolean savedConnection) {
+        this.savedConnection = savedConnection;
+    }
+
+    public String getSavedProfileId() {
+        return savedProfileId;
+    }
+
+    public void setSavedProfileId(String savedProfileId) {
+        this.savedProfileId = savedProfileId;
+    }
+
+    public String getSavedProfileName() {
+        return savedProfileName;
+    }
+
+    public void setSavedProfileName(String savedProfileName) {
+        this.savedProfileName = savedProfileName;
+    }
+
     /**
      * Parse a host connection string which may include prefixes for TLS (e.g. "L:host:port", "ssl:host:port", "y:host:port"),
      * plain TN3270 (e.g. "P:host:port", "plain:host:port", "non-e:host:port"), proxy flags (e.g. "--proxy=http://proxy:8080 host:23"),

lib3270j/src/main/java/haus/nightmare/lib3270j/Telnet3270Client.java

@@ -11,6 +11,7 @@ import haus.nightmare.lib3270j.telnet.TelnetFSM;
 
 import java.io.IOException;
 import java.util.logging.Logger;
+import java.util.logging.Level;
 
 /**
  * Main API entry point for lib3270j.
@@ -46,6 +47,7 @@ public class Telnet3270Client {
 
     private final java.util.concurrent.atomic.AtomicBoolean reconnecting = new java.util.concurrent.atomic.AtomicBoolean(false);
     private volatile Thread reconnectThread;
+    private volatile boolean intentionallyDisconnected = false;
 
     public Telnet3270Client(ConnectionConfig config) {
         this.config = config;
@@ -130,6 +132,7 @@ public class Telnet3270Client {
      * then returns while telnet/TN3270E negotiation continues asynchronously.
      */
     public void connect() throws IOException {
+        intentionallyDisconnected = false;
         log.info("Connecting to " + config.getHost() + ":" + config.getPort() +
             " model=" + config.getModel());
 
@@ -193,8 +196,16 @@ public class Telnet3270Client {
      * Disconnect from the host.
      */
     public void disconnect() {
+        intentionallyDisconnected = true;
         cancelAutoReconnect();
         if (connection != null) {
+            try {
+                if (fsm != null) {
+                    fsm.sendTelnetDisconnect();
+                }
+            } catch (Exception e) {
+                log.log(Level.FINE, "Error during Telnet disconnect negotiation", e);
+            }
             connection.disconnect();
             connection = null;
         }
@@ -203,14 +214,20 @@ public class Telnet3270Client {
 
     public void cancelAutoReconnect() {
         reconnecting.set(false);
-        if (reconnectThread != null) {
-            reconnectThread.interrupt();
+        Thread t = reconnectThread;
+        if (t != null) {
+            t.interrupt();
+            try {
+                t.join(200);
+            } catch (InterruptedException e) {
+                Thread.currentThread().interrupt();
+            }
             reconnectThread = null;
         }
     }
 
     public void initiateAutoReconnect() {
-        if (config == null || !config.isAutoReconnect()) {
+        if (intentionallyDisconnected || config == null || !config.isAutoReconnect()) {
             return;
         }
         if (!reconnecting.compareAndSet(false, true)) {

lib3270j/src/main/java/haus/nightmare/lib3270j/charset/AbstractDBCSCodePage.java

@@ -27,12 +27,16 @@ public abstract class AbstractDBCSCodePage extends AbstractCodePage {
                                 int[] sbcsMapping, String nioCharsetName) {
         super(id, description, cpgid, cgcsgid, sbcsMapping);
         if (nioCharsetName != null) {
+            for (String candidate : nioCharsetName.split(",")) {
+                candidate = candidate.trim();
                 try {
-                if (Charset.isSupported(nioCharsetName)) {
-                    this.nioCharset = Charset.forName(nioCharsetName);
+                    if (Charset.isSupported(candidate)) {
+                        this.nioCharset = Charset.forName(candidate);
+                        break;
                     }
                 } catch (Exception ignored) {}
             }
+        }
         // Initialize ideographic space (0x4040 <-> \u3000)
         registerDbcsPair(0x4040, '\u3000');
     }
@@ -250,4 +254,78 @@ public abstract class AbstractDBCSCodePage extends AbstractCodePage {
     public byte[] utf8WithSOSIToEbcdic(String s) {
         return stringToEbcdic(s, true);
     }
+
+    /**
+     * Double-byte character set Graphic Character Set Global ID (DBGID/CGCSGID) matching HoD DBGIDTable.
+     */
+    public int getDbCgcsgid() {
+        switch (getCpgid()) {
+            case 930:
+            case 939:
+            case 290:
+                return 370; // 0x0172
+            case 933:
+                return 934; // 0x03A6
+            case 935:
+                return 937; // 0x03A9
+            case 937:
+                return 935; // 0x03A7
+            case 1390:
+            case 1399:
+            case 1364:
+            case 1371:
+            case 1388:
+                return 65535; // 0xFFFF
+            default:
+                return 370;
         }
+    }
+
+    /**
+     * Double-byte character set Code Page Global ID (DBCS CPGID) matching HoD DBGIDTable.
+     */
+    public int getDbCpgid() {
+        switch (getCpgid()) {
+            case 930:
+            case 939:
+            case 290:
+            case 1390:
+            case 1399:
+                return 300; // 0x012C
+            case 933:
+            case 1364:
+                return 834; // 0x0342
+            case 935:
+            case 1388:
+                return 837; // 0x0345
+            case 937:
+            case 1371:
+                return 835; // 0x0343
+            default:
+                return 300;
+        }
+    }
+
+    /**
+     * Double-byte character set section start byte matching HoD DBCSSectTable.
+     */
+    public byte getDbcsSectionStart() {
+        return 0x41;
+    }
+
+    /**
+     * Double-byte character set section end byte matching HoD DBCSSectTable.
+     */
+    public byte getDbcsSectionEnd() {
+        switch (getCpgid()) {
+            case 290:
+            case 930:
+            case 935:
+            case 939:
+                return 0x7F;
+            default:
+                return (byte) 0xFE;
+        }
+    }
+}
+

lib3270j/src/main/java/haus/nightmare/lib3270j/charset/CodePageRegistry.java

@@ -311,6 +311,12 @@ public class CodePageRegistry {
         register(new Cp1388());
         register(new Cp1371());
 
+        // Japanese Katakana & Latin SBCS / DBCS Euro
+        register(new Cp290());
+        register(new Cp1027());
+        register(new Cp1390());
+        register(new Cp1399());
+
         // Setup Extended Aliases
         addAlias("ar", "420");
         addAlias("arabic", "420");
@@ -360,10 +366,12 @@ public class CodePageRegistry {
         addAlias("zh-tw-ext", "1371");
 
         // HoD Converter aliases mapping all HoD converter names to CodePage / Charset
-        addAlias("1390", "930");
-        addAlias("1390jis2004", "930");
-        addAlias("1399", "939");
-        addAlias("1399jis2004", "939");
+        addAlias("1390", "1390");
+        addAlias("1390jis2004", "1390");
+        addAlias("1399", "1399");
+        addAlias("1399jis2004", "1399");
+        addAlias("290", "290");
+        addAlias("1027", "1027");
         addAlias("937macau", "937");
         addAlias("1364", "933");
         addAlias("1379", "937");

lib3270j/src/main/java/haus/nightmare/lib3270j/charset/Cp1027.java

@@ -0,0 +1,43 @@
+package haus.nightmare.lib3270j.charset;
+
+/**
+ * IBM Code Page 1027 (Japanese Latin Extended SBCS).
+ * Conforms 1:1 to IBM Host On-Demand com.ibm.eNetwork.HOD.converters.ja.ByteToCharCp939.singleByteToChar.
+ * CCSID / CPGID: 1027, GCSGID: 1172.
+ */
+public class Cp1027 extends AbstractCodePage {
+
+    public static final String ID = "1027";
+    public static final String DESCRIPTION = "Japanese Latin Extended - EBCDIC";
+    public static final int CPGID = 1027;
+    public static final int GCSGID = 1172;
+
+    private static final String SBCS_STR =
+        "\u0000\u0001\u0002\u0003\u009c\t\u0086\u007f\u0097\u008d\u008e\u000b\f\r\u000e\u000f" +
+        "\u0010\u0011\u0012\u0013\u009d\u0085\b\u0087\u0018\u0019\u0092\u008f\u001c\u001d\u001e\u001f" +
+        "\u0080\u0081\u0082\u0083\u0084\n\u0017\u001b\u0088\u0089\u008a\u008b\u008c\u0005\u0006\u0007" +
+        "\u0090\u0091\u0016\u0093\u0094\u0095\u0096\u0004\u0098\u0099\u009a\u009b\u0014\u0015\u009e\u001a" +
+        " \ufffd\uff61\uff62\uff63\uff64\uff65\uff66\uff67\uff68\u00a2.<(+|" +
+        "&\uff69\uff6a\uff6b\uff6c\uff6d\uff6e\uff6f\uff70\uff71!$*);\u00ac" +
+        "-/\uff72\uff73\uff74\uff75\uff76\uff77\uff78\uff79\ufffd,%_>?" +
+        "\uff7a\uff7b\uff7c\uff7d\uff7e\uff7f\uff80\uff81\uff82`:#@'=\"" +
+        "\ufffdabcdefghi\uff83\uff84\uff85\uff86\uff87\uff88" +
+        "\ufffdjklmnopqr\uff89\uff8a\uff8b\uff8c\uff8d\uff8e" +
+        "\u203e~stuvwxyz\uff8f\uff90\uff91[\uff92\uff93^" +
+        "\u00a3\u00a5\uff94\uff95\uff96\uff97\uff98\uff99\uff9a\uff9b\uff9c\uff9d]\uff9e\uff9f" +
+        "{ABCDEFGHI\ufffd\ufffd\ufffd\ufffd\ufffd\ufffd" +
+        "}JKLMNOPQR\ufffd\ufffd\ufffd\ufffd\ufffd\ufffd" +
+        "\\\ufffdSTUVWXYZ\ufffd\ufffd\ufffd\ufffd\ufffd\ufffd" +
+        "0123456789\ufffd\ufffd\ufffd\ufffd\ufffd\u009f";
+
+    public static final int[] MAPPING = new int[256];
+    static {
+        for (int i = 0; i < 256; i++) {
+            MAPPING[i] = (i < SBCS_STR.length()) ? SBCS_STR.charAt(i) : i;
+        }
+    }
+
+    public Cp1027() {
+        super(ID, DESCRIPTION, CPGID, GCSGID, MAPPING);
+    }
+}

lib3270j/src/main/java/haus/nightmare/lib3270j/charset/Cp1390.java

@@ -0,0 +1,23 @@
+package haus.nightmare.lib3270j.charset;
+
+/**
+ * IBM Code Page 1390 (Japanese Katakana Extended Mixed DBCS with Euro support: host SBCS CP290+Euro / DBCS CP16684).
+ * CCSID / CPGID: 1390, GCSGID: 1172.
+ */
+public class Cp1390 extends AbstractDBCSCodePage {
+
+    public static final String ID = "1390";
+    public static final String DESCRIPTION = "Japanese Katakana Extended Mixed DBCS (with Euro)";
+    public static final int CPGID = 1390;
+    public static final int GCSGID = 1172;
+
+    public static final int[] MAPPING = Cp290.MAPPING.clone();
+    static {
+        // Euro symbol at 0xE1
+        MAPPING[0xE1] = 0x20AC;
+    }
+
+    public Cp1390() {
+        super(ID, DESCRIPTION, CPGID, GCSGID, MAPPING, "x-IBM1390,IBM1390,Cp1390,x-IBM930,IBM930,Cp930");
+    }
+}

lib3270j/src/main/java/haus/nightmare/lib3270j/charset/Cp1399.java

@@ -0,0 +1,23 @@
+package haus.nightmare.lib3270j.charset;
+
+/**
+ * IBM Code Page 1399 (Japanese Latin Extended Mixed DBCS with Euro support: host SBCS CP1027+Euro / DBCS CP16684).
+ * CCSID / CPGID: 1399, GCSGID: 1172.
+ */
+public class Cp1399 extends AbstractDBCSCodePage {
+
+    public static final String ID = "1399";
+    public static final String DESCRIPTION = "Japanese Latin Extended Mixed DBCS (with Euro)";
+    public static final int CPGID = 1399;
+    public static final int GCSGID = 1172;
+
+    public static final int[] MAPPING = Cp1027.MAPPING.clone();
+    static {
+        // Euro symbol at 0xE1
+        MAPPING[0xE1] = 0x20AC;
+    }
+
+    public Cp1399() {
+        super(ID, DESCRIPTION, CPGID, GCSGID, MAPPING, "x-IBM1399,IBM1399,Cp1399,x-IBM939,IBM939,Cp939");
+    }
+}

lib3270j/src/main/java/haus/nightmare/lib3270j/charset/Cp290.java

@@ -0,0 +1,43 @@
+package haus.nightmare.lib3270j.charset;
+
+/**
+ * IBM Code Page 290 (Japanese Katakana Extended SBCS).
+ * Conforms 1:1 to IBM Host On-Demand com.ibm.eNetwork.HOD.converters.ja.ByteToCharCp290.
+ * CCSID / CPGID: 290, GCSGID: 1172.
+ */
+public class Cp290 extends AbstractCodePage {
+
+    public static final String ID = "290";
+    public static final String DESCRIPTION = "Japanese Katakana Extended - EBCDIC";
+    public static final int CPGID = 290;
+    public static final int GCSGID = 1172;
+
+    private static final String SBCS_STR =
+        "\u0000\u0001\u0002\u0003\u009c\t\u0086\u007f\u0097\u008d\u008e\u000b\f\r\u000e\u000f" +
+        "\u0010\u0011\u0012\u0013\u009d\u0085\b\u0087\u0018\u0019\u0092\u008f\u001c\u001d\u001e\u001f" +
+        "\u0080\u0081\u0082\u0083\u0084\n\u0017\u001b\u0088\u0089\u008a\u008b\u008c\u0005\u0006\u0007" +
+        "\u0090\u0091\u0016\u0093\u0094\u0095\u0096\u0004\u0098\u0099\u009a\u009b\u0014\u0015\u009e\u001a" +
+        " \uff61\uff62\uff63\uff64\uff65\uff66\uff67\uff68\uff69\u00a3.<(+|" +
+        "&\uff6a\uff6b\uff6c\uff6d\uff6e\uff6f\ufffd\uff70\ufffd!\u00a5*);\u00ac" +
+        "-/\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\ufffd,%_>?" +
+        "\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000:#@'=\"" +
+        "\u0000\uff71\uff72\uff73\uff74\uff75\uff76\uff77\uff78\uff79\uff7a\u0000\uff7b\uff7c\uff7d\uff7e" +
+        "\uff7f\uff80\uff81\uff82\uff83\uff84\uff85\uff86\uff87\uff88\uff89\u0000\ufffd\uff8a\uff8b\uff8c" +
+        "\u0000\u203e\uff8d\uff8e\uff8f\uff90\uff91\uff92\uff93\uff94\uff95\u0000\uff96\uff97\uff98\uff99" +
+        "\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\uff9a\uff9b\uff9c\uff9d\uff9e\uff9f" +
+        "\u0000ABCDEFGHI\ufffd\ufffd\ufffd\ufffd\ufffd\ufffd" +
+        "\u0000JKLMNOPQR\ufffd\ufffd\ufffd\ufffd\ufffd\ufffd" +
+        "$\ufffdSTUVWXYZ\ufffd\ufffd\ufffd\ufffd\ufffd\ufffd" +
+        "0123456789\ufffd\ufffd\ufffd\ufffd\ufffd\u009f";
+
+    public static final int[] MAPPING = new int[256];
+    static {
+        for (int i = 0; i < 256; i++) {
+            MAPPING[i] = (i < SBCS_STR.length()) ? SBCS_STR.charAt(i) : i;
+        }
+    }
+
+    public Cp290() {
+        super(ID, DESCRIPTION, CPGID, GCSGID, MAPPING);
+    }
+}

lib3270j/src/main/java/haus/nightmare/lib3270j/charset/Cp930.java

@@ -12,6 +12,6 @@ public class Cp930 extends AbstractDBCSCodePage {
     public static final int GCSGID = 1172;
 
     public Cp930() {
-        super(ID, DESCRIPTION, CPGID, GCSGID, Cp037.MAPPING, "x-IBM930");
+        super(ID, DESCRIPTION, CPGID, GCSGID, Cp290.MAPPING, "x-IBM930,IBM930,Cp930");
     }
 }

lib3270j/src/main/java/haus/nightmare/lib3270j/charset/Cp939.java

@@ -12,6 +12,6 @@ public class Cp939 extends AbstractDBCSCodePage {
     public static final int GCSGID = 1172;
 
     public Cp939() {
-        super(ID, DESCRIPTION, CPGID, GCSGID, Cp037.MAPPING, "x-IBM939");
+        super(ID, DESCRIPTION, CPGID, GCSGID, Cp1027.MAPPING, "x-IBM939,IBM939,Cp939");
     }
 }

lib3270j/src/main/java/haus/nightmare/lib3270j/charset/EbcdicTranslator.java

@@ -90,6 +90,35 @@ public class EbcdicTranslator {
         return isDBCSCodePage();
     }
 
+    public synchronized int getDbCgcsgid() {
+        if (activeCodePage instanceof AbstractDBCSCodePage) {
+            return ((AbstractDBCSCodePage) activeCodePage).getDbCgcsgid();
+        }
+        return 370;
+    }
+
+    public synchronized int getDbCpgid() {
+        if (activeCodePage instanceof AbstractDBCSCodePage) {
+            return ((AbstractDBCSCodePage) activeCodePage).getDbCpgid();
+        }
+        return 300;
+    }
+
+    public synchronized byte getDbcsSectionStart() {
+        if (activeCodePage instanceof AbstractDBCSCodePage) {
+            return ((AbstractDBCSCodePage) activeCodePage).getDbcsSectionStart();
+        }
+        return 0x41;
+    }
+
+    public synchronized byte getDbcsSectionEnd() {
+        if (activeCodePage instanceof AbstractDBCSCodePage) {
+            return ((AbstractDBCSCodePage) activeCodePage).getDbcsSectionEnd();
+        }
+        return 0x7F;
+    }
+
+
     // =========================================================================
     // Custom Character Translation Overrides
     // =========================================================================

lib3270j/src/main/java/haus/nightmare/lib3270j/datastream/DataStreamProcessor.java

@@ -53,6 +53,7 @@ public class DataStreamProcessor {
     private boolean unlockPending = false;
     private boolean unlockSysPending = false;
     private boolean rcvdRead = false;
+    private boolean qreplyPending = false;
 
     // Modal SA (set attribute) character attributes
     private byte currentFg = 0;
@@ -60,6 +61,8 @@ public class DataStreamProcessor {
     private byte currentGr = 0;
     private byte currentCs = 0;
     private byte currentOl = 0;
+    private byte currentTr = 0;
+    private boolean inDBCS = false;
 
     /** Functional interface for sending output back through the telnet stack. */
     @FunctionalInterface
@@ -181,11 +184,13 @@ public class DataStreamProcessor {
             switch (cmd) {
                 case CMD_W:
                 case SNA_CMD_W:
+                    qreplyPending = false;
                     programSymbolManager.commitStagedSymbols();
                     processWrite(data, offset, length, false);
                     break;
                 case CMD_EW:
                 case SNA_CMD_EW:
+                    qreplyPending = false;
                     programSymbolManager.commitStagedSymbols();
                     if (log.isLoggable(Level.FINE)) {
                         log.fine(">>> ERASE/WRITE: clearing screen (default size)");
@@ -206,6 +211,7 @@ public class DataStreamProcessor {
                     break;
                 case CMD_EWA:
                 case SNA_CMD_EWA:
+                    qreplyPending = false;
                     programSymbolManager.commitStagedSymbols();
                     if (log.isLoggable(Level.FINE)) {
                         log.fine(">>> ERASE/WRITE ALTERNATE: clearing screen (alt size)");
@@ -234,7 +240,12 @@ public class DataStreamProcessor {
                 case SNA_CMD_RM:
                     rcvdRead = true;
                     programSymbolManager.commitStagedSymbols();
+                    if (qreplyPending) {
+                        qreplyPending = false;
+                        sendAllQueryReplies();
+                    } else {
                         processReadModified(false);
+                    }
                     break;
                 case CMD_RMA:
                 case SNA_CMD_RMA:
@@ -244,7 +255,11 @@ public class DataStreamProcessor {
                     break;
                 case CMD_EAU:
                 case SNA_CMD_EAU:
+                    qreplyPending = false;
                     programSymbolManager.commitStagedSymbols();
+                    if (inputProcessor != null) {
+                        inputProcessor.setLastAid(AID_NO);
+                    }
                     log.info(">>> EAU: erasing all unprotected fields");
                     screen.eraseAllUnprotected();
                     currentFg = 0;
@@ -252,6 +267,7 @@ public class DataStreamProcessor {
                     currentGr = 0;
                     currentCs = 0;
                     currentOl = 0;
+                    currentTr = 0;
                     break;
                 case CMD_WSF:
                 case SNA_CMD_WSF:
@@ -277,6 +293,7 @@ public class DataStreamProcessor {
                               cmd == CMD_EWA || cmd == SNA_CMD_EWA);
         if (!isWriteCmd && keyboardRestore && inputProcessor != null && !contentionResolution) {
             inputProcessor.setKeyboardLocked(false);
+            inputProcessor.setLastAid(AID_NO);
         }
 
         // Debug: dump non-empty screen lines
@@ -376,10 +393,14 @@ public class DataStreamProcessor {
         if (kbdRestore) {
             unlockPending = true;
             unlockSysPending = true;
+            if (inputProcessor != null) {
+                inputProcessor.setLastAid(AID_NO);
+            }
         }
 
         if (!contentionResolution && kbdRestore && inputProcessor != null) {
             inputProcessor.setKeyboardLocked(false);
+            inputProcessor.setLastAid(AID_NO);
         }
 
         if (resetMdt) {
@@ -395,6 +416,8 @@ public class DataStreamProcessor {
             currentGr = 0;
             currentCs = 0;
             currentOl = 0;
+            currentTr = 0;
+            inDBCS = false;
         }
 
         if (eraseFirst) {
@@ -405,6 +428,8 @@ public class DataStreamProcessor {
             currentGr = 0;
             currentCs = 0;
             currentOl = 0;
+            currentTr = 0;
+            inDBCS = false;
         }
 
         // Process orders and data starting at byte 2
@@ -435,6 +460,7 @@ public class DataStreamProcessor {
                 }
 
                 case ORDER_SF: { // Start Field
+                    inDBCS = false;
                     if (pos + 1 >= end) {
                         pos = end;
                         break;
@@ -456,6 +482,7 @@ public class DataStreamProcessor {
                 }
 
                 case ORDER_SFE: { // Start Field Extended
+                    inDBCS = false;
                     if (pos + 1 >= end) {
                         pos = end;
                         break;
@@ -502,6 +529,7 @@ public class DataStreamProcessor {
                             currentGr = 0;
                             currentCs = 0;
                             currentOl = 0;
+                            currentTr = 0;
                             break;
                         case XA_FOREGROUND:
                             currentFg = (byte) attrValue;
@@ -530,6 +558,9 @@ public class DataStreamProcessor {
                         case 0x84:
                             currentOl = (byte) attrValue;
                             break;
+                        case XA_TRANSPARENCY:
+                            currentTr = (byte) attrValue;
+                            break;
                     }
                     pos += 3;
                     lastWasOrder = true;
@@ -591,6 +622,44 @@ public class DataStreamProcessor {
                     if (toAddr >= size)
                         toAddr = toAddr % size;
 
+                    boolean isDbcsSession = (translator != null && translator.isDBCS());
+                    if (isDbcsSession && (inDBCS || currentCs == ExtendedAttribute.CS_DBCS) && pos + 4 < end) {
+                        int fillChar2 = data[pos + 4] & 0xFF;
+                        char uni = (translator.getCodePage() != null) ? translator.getCodePage().dbcsToUnicode(fillChar, fillChar2) : '?';
+                        do {
+                            ExtendedAttribute ea1 = screen.getCell(baddr);
+                            ea1.fa = 0;
+                            ea1.ec = (byte) fillChar;
+                            ea1.ucs4 = uni;
+                            ea1.fg = currentFg;
+                            ea1.bg = currentBg;
+                            ea1.gr = (byte) currentGr;
+                            ea1.cs = ExtendedAttribute.CS_DBCS;
+                            ea1.db = ExtendedAttribute.DB_LEFT;
+                            ea1.ol = currentOl;
+                            ea1.tr = currentTr;
+                            baddr = (baddr + 1) % size;
+                            if (baddr == toAddr) break;
+
+                            ExtendedAttribute ea2 = screen.getCell(baddr);
+                            ea2.fa = 0;
+                            ea2.ec = (byte) fillChar2;
+                            ea2.ucs4 = uni;
+                            ea2.fg = currentFg;
+                            ea2.bg = currentBg;
+                            ea2.gr = (byte) currentGr;
+                            ea2.cs = ExtendedAttribute.CS_DBCS;
+                            ea2.db = ExtendedAttribute.DB_RIGHT;
+                            ea2.ol = currentOl;
+                            ea2.tr = currentTr;
+                            baddr = (baddr + 1) % size;
+                        } while (baddr != toAddr);
+                        screen.setBufferAddress(baddr);
+                        pos += 5;
+                        lastWasOrder = true;
+                        break;
+                    }
+
                     // Handle GE (graphic escape) prefix
                     byte fillCs = currentCs;
                     char fillUcs4 = 0;
@@ -614,7 +683,9 @@ public class DataStreamProcessor {
                         ea.bg = currentBg;
                         ea.gr = (byte) currentGr;
                         ea.cs = fillCs;
+                        ea.db = ExtendedAttribute.DB_NONE;
                         ea.ol = currentOl;
+                        ea.tr = currentTr;
                         baddr = (baddr + 1) % size;
                     } while (baddr != toAddr);
                     screen.setBufferAddress(baddr);
@@ -644,6 +715,7 @@ public class DataStreamProcessor {
                                 ea.gr = 0;
                                 ea.cs = 0;
                                 ea.ol = 0;
+                                ea.tr = 0;
                             }
                         }
                         baddr = (baddr + 1) % size;
@@ -669,6 +741,7 @@ public class DataStreamProcessor {
                     ea.bg = currentBg;
                     ea.gr = (byte) currentGr;
                     ea.ol = currentOl;
+                    ea.tr = currentTr;
                     baddr = (baddr + 1) % size;
                     screen.setBufferAddress(baddr);
                     pos += 2;
@@ -677,6 +750,98 @@ public class DataStreamProcessor {
                 }
 
                 default: {
+                    boolean isDbcsSession = (translator != null && translator.isDBCS());
+                    if (isDbcsSession && b == 0x0E) { // Shift-Out (enter DBCS mode)
+                        inDBCS = true;
+                        ExtendedAttribute ea = screen.getCell(baddr);
+                        ea.fa = 0;
+                        ea.ec = (byte) 0x0E;
+                        ea.ucs4 = ' ';
+                        ea.cs = ExtendedAttribute.CS_BASE;
+                        ea.db = ExtendedAttribute.DB_SO;
+                        ea.fg = currentFg;
+                        ea.bg = currentBg;
+                        ea.gr = (byte) currentGr;
+                        ea.ol = currentOl;
+                        ea.tr = currentTr;
+                        baddr = (baddr + 1) % size;
+                        screen.setBufferAddress(baddr);
+                        pos += 1;
+                        lastWasOrder = false;
+                        break;
+                    } else if (isDbcsSession && b == 0x0F) { // Shift-In (exit DBCS mode)
+                        inDBCS = false;
+                        ExtendedAttribute ea = screen.getCell(baddr);
+                        ea.fa = 0;
+                        ea.ec = (byte) 0x0F;
+                        ea.ucs4 = ' ';
+                        ea.cs = ExtendedAttribute.CS_BASE;
+                        ea.db = ExtendedAttribute.DB_SI;
+                        ea.fg = currentFg;
+                        ea.bg = currentBg;
+                        ea.gr = (byte) currentGr;
+                        ea.ol = currentOl;
+                        ea.tr = currentTr;
+                        baddr = (baddr + 1) % size;
+                        screen.setBufferAddress(baddr);
+                        pos += 1;
+                        lastWasOrder = false;
+                        break;
+                    } else if (isDbcsSession && (inDBCS || currentCs == ExtendedAttribute.CS_DBCS)) {
+                        if (pos + 1 < end) {
+                            int b2 = data[pos + 1] & 0xFF;
+                            if (b2 == 0x0F) { // Orphaned single byte before SI
+                                ExtendedAttribute ea = screen.getCell(baddr);
+                                ea.fa = 0;
+                                ea.ec = (byte) b;
+                                ea.ucs4 = translator.ebcdicToUnicode(b);
+                                ea.fg = currentFg;
+                                ea.bg = currentBg;
+                                ea.gr = (byte) currentGr;
+                                ea.cs = currentCs;
+                                ea.ol = currentOl;
+                                ea.tr = currentTr;
+                                ea.db = ExtendedAttribute.DB_NONE;
+                                baddr = (baddr + 1) % size;
+                                screen.setBufferAddress(baddr);
+                                pos += 1;
+                                lastWasOrder = false;
+                                break;
+                            }
+                            char uni = (translator.getCodePage() != null) ? translator.getCodePage().dbcsToUnicode(b, b2) : '?';
+                            ExtendedAttribute ea1 = screen.getCell(baddr);
+                            ea1.fa = 0;
+                            ea1.ec = (byte) b;
+                            ea1.ucs4 = uni;
+                            ea1.fg = currentFg;
+                            ea1.bg = currentBg;
+                            ea1.gr = (byte) currentGr;
+                            ea1.cs = ExtendedAttribute.CS_DBCS;
+                            ea1.db = ExtendedAttribute.DB_LEFT;
+                            ea1.ol = currentOl;
+                            ea1.tr = currentTr;
+
+                            int nextAddr = (baddr + 1) % size;
+                            ExtendedAttribute ea2 = screen.getCell(nextAddr);
+                            ea2.fa = 0;
+                            ea2.ec = (byte) b2;
+                            ea2.ucs4 = uni;
+                            ea2.fg = currentFg;
+                            ea2.bg = currentBg;
+                            ea2.gr = (byte) currentGr;
+                            ea2.cs = ExtendedAttribute.CS_DBCS;
+                            ea2.db = ExtendedAttribute.DB_RIGHT;
+                            ea2.ol = currentOl;
+                            ea2.tr = currentTr;
+
+                            baddr = (baddr + 2) % size;
+                            screen.setBufferAddress(baddr);
+                            pos += 2;
+                            lastWasOrder = false;
+                            break;
+                        }
+                    }
+
                     // Regular data byte (EBCDIC character)
                     // Format control codes display as nulls/blanks per 3270 spec
                     boolean isFCOrder = (b == FCORDER_NULL || b == FCORDER_FF ||
@@ -688,14 +853,18 @@ public class DataStreamProcessor {
 
                     if (isFCOrder) {
                         ea.ec = 0; // Display as null/blank
+                        ea.ucs4 = 0;
                     } else {
                         ea.ec = (byte) b;
+                        ea.ucs4 = (translator != null) ? translator.ebcdicToUnicode(b) : (char) b;
                     }
                     ea.fg = currentFg;
                     ea.bg = currentBg;
                     ea.gr = (byte) currentGr;
                     ea.cs = currentCs;
+                    ea.db = ExtendedAttribute.DB_NONE;
                     ea.ol = currentOl;
+                    ea.tr = currentTr;
 
                     baddr = (baddr + 1) % size;
                     screen.setBufferAddress(baddr);
@@ -773,13 +942,26 @@ public class DataStreamProcessor {
     // ========== Read Buffer ==========
 
     public void processReadBuffer() {
+        int aid = (inputProcessor != null && inputProcessor.getLastAid() != 0)
+                ? inputProcessor.getLastAid()
+                : AID_NO;
+        processReadBuffer(aid);
+    }
+
+    public void processReadBuffer(int aid) {
+        if (inputProcessor != null) {
+            inputProcessor.setLastAid(AID_NO);
+            byte[] data = inputProcessor.buildReadBufferInboundData(aid);
+            if (outputSender != null) {
+                outputSender.send3270Data(data);
+            }
+            return;
+        }
+
         outputPos = 0;
 
         int size = screen.getRows() * screen.getCols();
 
-        int aid = (inputProcessor != null && inputProcessor.getLastAid() != 0)
-                ? inputProcessor.getLastAid()
-                : AID_NO;
         if (inputProcessor != null) {
             inputProcessor.setLastAid(AID_NO);
         }
@@ -796,7 +978,7 @@ public class DataStreamProcessor {
         // Buffer contents depending on Reply Mode
         if (mode == SF_SRM_XFIELD || mode == SF_SRM_CHAR) {
             // Extended Field or Character Mode
-            byte curFg = 0, curBg = 0, curGr = 0, curCs = 0;
+            byte curFg = 0, curBg = 0, curGr = 0, curCs = 0, curTr = 0;
             for (int i = 0; i < size; i++) {
                 ExtendedAttribute ea = screen.getCell(i);
                 if (ea.isFieldAttribute()) {
@@ -807,6 +989,7 @@ public class DataStreamProcessor {
                     if (ea.gr != 0) count++;
                     if (ea.cs != 0) count++;
                     if (ea.ol != 0) count++;
+                    if (ea.tr != 0) count++;
 
                     outputWrite(ORDER_SFE);
                     outputWrite(count);
@@ -825,6 +1008,7 @@ public class DataStreamProcessor {
                     }
                     if (ea.cs != 0) { outputWrite(XA_CHARSET); outputWrite(ea.cs & 0xFF); }
                     if (ea.ol != 0) { outputWrite(XA_OUTLINING); outputWrite(ea.ol & 0xFF); }
+                    if (ea.tr != 0) { outputWrite(XA_TRANSPARENCY); outputWrite(ea.tr & 0xFF); }
                 } else {
                     if (mode == SF_SRM_CHAR) {
                         // In character mode, output SA if character attributes differ
@@ -850,6 +1034,10 @@ public class DataStreamProcessor {
                             outputWrite(ORDER_SA); outputWrite(XA_CHARSET); outputWrite(ea.cs & 0xFF);
                             curCs = ea.cs;
                         }
+                        if (ea.tr != curTr) {
+                            outputWrite(ORDER_SA); outputWrite(XA_TRANSPARENCY); outputWrite(ea.tr & 0xFF);
+                            curTr = ea.tr;
+                        }
                     }
                     outputWrite(ea.ec & 0xFF);
                 }
@@ -873,12 +1061,18 @@ public class DataStreamProcessor {
     // ========== Read Modified ==========
 
     public void processReadModified(boolean all) {
+        int aid = (inputProcessor != null && inputProcessor.isKeyboardLocked() && inputProcessor.getLastAid() != 0 && inputProcessor.getLastAid() != AID_NO)
+                ? inputProcessor.getLastAid()
+                : AID_NO;
+        processReadModified(aid, all);
+    }
+
+    public void processReadModified(int aid, boolean all) {
         if (ftDft != null && ftDft.readModified()) {
             return;
         }
 
         if (inputProcessor != null) {
-            int aid = (inputProcessor.getLastAid() != 0) ? inputProcessor.getLastAid() : AID_NO;
             inputProcessor.setLastAid(AID_NO);
             byte[] data = inputProcessor.buildReadModifiedInboundData(aid, all);
             if (outputSender != null) {
@@ -889,9 +1083,6 @@ public class DataStreamProcessor {
 
         outputPos = 0;
 
-        int aid = (inputProcessor != null && inputProcessor.getLastAid() != 0)
-                ? inputProcessor.getLastAid()
-                : AID_NO;
         if (inputProcessor != null) {
             inputProcessor.setLastAid(AID_NO);
         }
@@ -1054,9 +1245,11 @@ public class DataStreamProcessor {
                 log.info("ReadPartition Query — sending base query replies");
                 graphicsPlane.clear();
                 gocaDecoder.resetDefaults();
+                qreplyPending = true;
                 sendAllQueryReplies();
                 break;
             case SF_RP_QLIST:
+                qreplyPending = true;
                 if (fieldLen >= 6) {
                     int listType = data[offset + 5] & 0xFF;
                     log.info("ReadPartition QueryList type=" + String.format("0x%02x", listType));
@@ -1079,14 +1272,16 @@ public class DataStreamProcessor {
                     sendAllQueryReplies();
                 }
                 break;
+            case CMD_RMA:
             case SNA_CMD_RMA:
-                processReadModified(true);
+                processReadModified(AID_QREPLY, true);
                 break;
             case SNA_CMD_RB:
-                processReadBuffer();
+                processReadBuffer(AID_QREPLY);
                 break;
+            case CMD_RM:
             case SNA_CMD_RM:
-                processReadModified(false);
+                processReadModified(AID_QREPLY, false);
                 break;
             default:
                 log.fine("Unknown ReadPartition type: " + String.format("0x%02x", type));
@@ -1517,6 +1712,14 @@ public class DataStreamProcessor {
         processReadModified(true);
     }
 
+    public boolean isQreplyPending() {
+        return qreplyPending;
+    }
+
+    public void setQreplyPending(boolean qreplyPending) {
+        this.qreplyPending = qreplyPending;
+    }
+
     public void processWriteStructuredField(byte[] data) {
         if (data != null && data.length > 0) {
             processWriteStructuredField(data, 0, data.length);

lib3270j/src/main/java/haus/nightmare/lib3270j/datastream/QueryReplyBuilder.java

@@ -129,6 +129,7 @@ public class QueryReplyBuilder {
         QR_DDM,          // 0x95 - Distributed Data Management (file transfer)
         QR_AUXDA,        // 0x99 - Auxiliary Devices
         QR_IMP_PART,     // 0xa6 - Implicit Partition Sizes
+        QR_TRANSPARENCY, // 0xa8 - Background Transparency
     };
 
     // Vector graphics query reply codes matching HOD QueryReply3270Constants.java QR_3270_WITHOUT_DCBS_SUMMARY_STRING
@@ -218,6 +219,9 @@ public class QueryReplyBuilder {
         // Implicit Partition (0xA6)
         appendQueryReply(out, QR_IMP_PART, buildImplicitPartition(maxCols, maxRows));
 
+        // Background Transparency (0xA8)
+        appendQueryReply(out, QR_TRANSPARENCY, STATIC_QR_TRANSPARENCY);
+
         log.info("Built " + out.size() + " bytes of base query replies (graphicsMode=" + graphicsMode + ")");
         return out.toByteArray();
     }
@@ -245,9 +249,9 @@ public class QueryReplyBuilder {
         appendQueryReply(out, QR_DDM, buildDdm(4096));
         appendQueryReply(out, QR_AUXDA, STATIC_QR_AUXDA);
         appendQueryReply(out, QR_IMP_PART, buildImplicitPartition(maxCols, maxRows));
+        appendQueryReply(out, QR_TRANSPARENCY, STATIC_QR_TRANSPARENCY); // 0xA8
 
         if (graphicsMode.isVectorGraphicsEnabled()) {
-            appendQueryReply(out, QR_TRANSPARENCY, STATIC_QR_TRANSPARENCY); // 0xA8
             appendQueryReply(out, QR_SEGMENT, STATIC_QR_SEGMENT);           // 0xB0
             appendQueryReply(out, QR_PROCEDURE, STATIC_QR_PROCEDURE);       // 0xB1
             appendQueryReply(out, QR_LINETYPE, STATIC_QR_LINETYPE);         // 0xB2
@@ -317,11 +321,7 @@ public class QueryReplyBuilder {
                     appendQueryReply(out, QR_IMP_PART, buildImplicitPartition(maxCols, maxRows));
                     break;
                 case QR_TRANSPARENCY: // 0xA8
-                    if (graphicsMode.isVectorGraphicsEnabled()) {
                     appendQueryReply(out, QR_TRANSPARENCY, STATIC_QR_TRANSPARENCY);
-                    } else {
-                        appendQueryReply(out, QR_NULL, new byte[0]);
-                    }
                     break;
                 case QR_SEGMENT: // 0xB0
                     if (graphicsMode.isVectorGraphicsEnabled()) {
@@ -390,10 +390,17 @@ public class QueryReplyBuilder {
         ByteArrayOutputStream out = new ByteArrayOutputStream();
         int[] codes = graphicsMode.isVectorGraphicsEnabled() ? SUPPORTED_QR_VECTOR : SUPPORTED_QR_BASE;
         boolean isDbcs = (screen != null && screen.getTranslator() != null && screen.getTranslator().isDBCS());
+        boolean wroteDbcs = false;
         for (int code : codes) {
+            if (isDbcs && !wroteDbcs && code == QR_DDM) {
+                out.write(QR_OUTLINING);
+                out.write(QR_DBCS_ASIA);
+                wroteDbcs = true;
+            }
             out.write(code);
-            if (isDbcs && code == QR_OUTLINING) {
+            if (isDbcs && code == QR_OUTLINING && !wroteDbcs) {
                 out.write(QR_DBCS_ASIA); // 0x91
+                wroteDbcs = true;
             }
         }
         return out.toByteArray();
@@ -441,7 +448,7 @@ public class QueryReplyBuilder {
 
     public int getCharWidth(int rows) {
         if (screen != null && screen.getTranslator() != null && screen.getTranslator().isDBCS()) {
-            return 12;
+            return 12; // 0x0C
         }
         return SW_3279_2; // 9
     }
@@ -452,6 +459,9 @@ public class QueryReplyBuilder {
     }
 
     public int getCharHeight(int rows) {
+        if (screen != null && screen.getTranslator() != null && screen.getTranslator().isDBCS()) {
+            return 24; // 0x18
+        }
         return graphicsMode.isVectorGraphicsEnabled() ? 0x10 : SH_3279_2;
     }
 
@@ -477,9 +487,54 @@ public class QueryReplyBuilder {
 
         int cgcsgid = 0x02B9;
         int cpgid = 0x0025;
+        boolean isDbcs = false;
         if (screen != null && screen.getTranslator() != null) {
             cgcsgid = screen.getTranslator().getCgcsgid();
             cpgid = screen.getTranslator().getCpgid();
+            isDbcs = screen.getTranslator().isDBCS();
+        }
+
+        if (isDbcs) {
+            int dbCgcsgid = screen.getTranslator().getDbCgcsgid();
+            int dbCpgid = screen.getTranslator().getDbCpgid();
+            byte secStart = screen.getTranslator().getDbcsSectionStart();
+            byte secEnd = screen.getTranslator().getDbcsSectionEnd();
+
+            // 42-byte DBCS Character Sets QR payload (total 46 bytes structured field, matching HoD DS3270.java xxxqrcs)
+            ByteArrayOutputStream out = new ByteArrayOutputStream(42);
+            out.write(0x8E); // flags: GE | DBCS / 2-byte charsets (0x8E)
+            out.write(0x00); // flags 2
+            out.write(charW); // SDW (12)
+            out.write(charH); // SDH (24)
+            out.write(0x00); out.write(0x00); out.write(0x00); out.write(0x00); // 4 reserved bytes
+            out.write(0x0B); // DL = 11 bytes per descriptor
+
+            // Descriptor 1: Base SBCS (11 bytes)
+            out.write(0x00); out.write(0x00); out.write(0x00);
+            out.write(0x00); out.write(0x00);
+            out.write(0x00); out.write(0x00);
+            out.write((cgcsgid >> 8) & 0xFF); out.write(cgcsgid & 0xFF);
+            out.write((cpgid >> 8) & 0xFF); out.write(cpgid & 0xFF);
+
+            // Descriptor 2: DBCS Set 1 (11 bytes)
+            out.write(0x01); // Set ID = 1
+            out.write(0x00); // Flags
+            out.write(0x80); // Local ID = 0x80 (DBCS)
+            out.write((charW * 2) & 0xFF); // Double cell width (24)
+            out.write(charH & 0xFF);       // Cell height (24)
+            out.write(secStart);           // Section start (e.g. 0x41)
+            out.write(secEnd);             // Section end (e.g. 0xFE or 0x7F)
+            out.write((dbCgcsgid >> 8) & 0xFF); out.write(dbCgcsgid & 0xFF);
+            out.write((dbCpgid >> 8) & 0xFF); out.write(dbCpgid & 0xFF);
+
+            // Descriptor 3: APL / Text (11 bytes)
+            out.write(0x01); out.write(0x00); out.write(0xF1);
+            out.write(0x00); out.write(0x00);
+            out.write(0x00); out.write(0x00);
+            out.write(0x03); out.write(0xC3); // CGCSGID 963
+            out.write(0x01); out.write(0x36); // CPGID 310
+
+            return out.toByteArray();
         }
 
         if (graphicsMode.isProgrammedSymbolsEnabled()) {
@@ -531,6 +586,7 @@ public class QueryReplyBuilder {
         return out.toByteArray();
     }
 
+
     public byte[] buildColor() {
         return STATIC_QR_COLOR.clone();
     }

lib3270j/src/main/java/haus/nightmare/lib3270j/ecl/ECLConstants.java

@@ -5,13 +5,27 @@ package haus.nightmare.lib3270j.ecl;
  */
 public interface ECLConstants {
 
-    // Presentation space logical planes
+    // Presentation space logical planes (Bitmask & ordinal definitions matching IBM Host On-Demand)
     int PLANE_TEXT              = 1; // Unicode/EBCDIC characters
     int PLANE_COLOR             = 2; // Color attributes
     int PLANE_HILITE            = 3; // Extended highlighting
     int PLANE_EXTENDED          = 4; // Extended character sets / outlining
     int PLANE_FIELD             = 5; // Field attribute definition bytes
-    int PLANE_DBCS     = 6; // Double-byte character plane
+    int PLANE_DBCS              = 6; // Double-byte character plane (lib3270j convention)
+    int PLANE_GRID              = 8; // Grid lines / outlining plane
+
+    // Canonical IBM Host On-Demand ECLConstants plane bitmasks
+    int TEXT_PLANE              = 1;
+    int COLOR_PLANE             = 2;
+    int DBCS_PLANE              = 4;
+    int GRID_PLANE              = 8;
+    int FIELD_PLANE             = 16;
+    int EXFIELD_PLANE           = 32;
+    int NLS_PLANE               = 64;
+    int HOST_PLANE              = 128;
+    int RAWTEXT_PLANE           = 256;
+    int COLOR_ATTRIBUTES_PLANE  = 512;
+    int ALL_PLANES              = 319;
 
     // Color definitions (IBM 3279 standard 16-color palette)
     char COLOR_NEUTRAL_BLACK = 0;

lib3270j/src/main/java/haus/nightmare/lib3270j/ecl/ECLField.java

@@ -295,6 +295,54 @@ public class ECLField {
     }
     public void Erase() { erase(); }
 
+    /**
+     * Check whether this field contains any DBCS characters or SO/SI delimiters.
+     */
+    public boolean isDBCS() {
+        if (ps == null || length <= 0) return false;
+        ScreenBuffer sb = ps.getScreenBuffer();
+        if (sb == null) return false;
+        int size = sb.getRows() * sb.getCols();
+        if (size <= 0) return false;
+        for (int i = 0; i < length; i++) {
+            int addr = (dataStart + i) % size;
+            ExtendedAttribute ea = sb.getCell(addr);
+            if (ea != null && (ea.db == ExtendedAttribute.DB_LEFT || ea.db == ExtendedAttribute.DB_RIGHT
+                    || ea.db == ExtendedAttribute.DB_SO || ea.db == ExtendedAttribute.DB_SI)) {
+                return true;
+            }
+        }
+        return false;
+    }
+    public boolean IsDBCS() { return isDBCS(); }
+
+    /**
+     * Check whether this field contains only DBCS characters (excluding nulls / spaces).
+     */
+    public boolean isDBCSOnly() {
+        if (ps == null || length <= 0) return false;
+        ScreenBuffer sb = ps.getScreenBuffer();
+        if (sb == null) return false;
+        int size = sb.getRows() * sb.getCols();
+        if (size <= 0) return false;
+        boolean hasDBCS = false;
+        for (int i = 0; i < length; i++) {
+            int addr = (dataStart + i) % size;
+            ExtendedAttribute ea = sb.getCell(addr);
+            if (ea != null) {
+                if (ea.db == ExtendedAttribute.DB_LEFT || ea.db == ExtendedAttribute.DB_RIGHT
+                        || ea.db == ExtendedAttribute.DB_SO || ea.db == ExtendedAttribute.DB_SI) {
+                    hasDBCS = true;
+                } else if (ea.ec != 0 && ea.ec != 0x40 && ea.ucs4 != 0 && ea.ucs4 != ' ') {
+                    return false;
+                }
+            }
+        }
+        return hasDBCS;
+    }
+    public boolean IsDBCSOnly() { return isDBCSOnly(); }
+
+
     @Override
     public boolean equals(Object o) {
         if (this == o) return true;

lib3270j/src/main/java/haus/nightmare/lib3270j/ecl/ECLFieldList.java

@@ -25,9 +25,22 @@ public class ECLFieldList extends Vector<ECLField> {
         refresh();
     }
 
+    public ECLFieldList(ECLPS ps) {
+        this(ps, ps != null ? ps.getScreenBuffer() : null);
+    }
+
+    public ECLField getField(int index) {
+        return (index >= 0 && index < size()) ? get(index) : null;
+    }
+
+    public ECLField GetField(int index) {
+        return getField(index);
+    }
+
     public ECLPS getPS() { return ps; }
     public ScreenBuffer getScreenBuffer() { return screen; }
 
+
     /**
      * Refresh the field list by scanning the presentation space buffer.
      */

lib3270j/src/main/java/haus/nightmare/lib3270j/ecl/ECLPS.java

@@ -264,10 +264,12 @@ public class ECLPS implements ECLConstants {
                 case PLANE_TEXT:
                     if (ea.isFieldAttribute()) {
                         destBuffer[i] = ' ';
+                    } else if (ea.db == ExtendedAttribute.DB_SO || ea.db == ExtendedAttribute.DB_SI) {
+                        destBuffer[i] = ' ';
                     } else if (ea.ucs4 != 0) {
                         destBuffer[i] = (char) ea.ucs4;
                     } else if (ea.ec != 0) {
-                        destBuffer[i] = translator.ebcdicToUnicode(ea.ec & 0xFF);
+                        destBuffer[i] = (translator != null) ? translator.ebcdicToUnicode(ea.ec & 0xFF) : (char) (ea.ec & 0xFF);
                     } else {
                         destBuffer[i] = ' ';
                     }
@@ -278,12 +280,43 @@ public class ECLPS implements ECLConstants {
                 case PLANE_HILITE:
                     destBuffer[i] = (char) (ea.gr & 0xFF);
                     break;
-                case PLANE_EXTENDED:
+                case DBCS_PLANE: // 4 (HoD DBCS_PLANE) or PLANE_EXTENDED for SBCS
+                    if (translator != null && translator.isDBCS()) {
+                        if (ea.db == ExtendedAttribute.DB_LEFT) {
+                            destBuffer[i] = (char) 0xC0; // DB_DBHIGH (first half of DBCS)
+                        } else if (ea.db == ExtendedAttribute.DB_RIGHT) {
+                            destBuffer[i] = (char) 0x80; // DB_DBCS (second half of DBCS)
+                        } else if (ea.db == ExtendedAttribute.DB_SO) {
+                            destBuffer[i] = (char) 0x20; // DB_SO
+                        } else if (ea.db == ExtendedAttribute.DB_SI) {
+                            destBuffer[i] = (char) 0x10; // DB_SI
+                        } else {
+                            destBuffer[i] = 0;
+                        }
+                    } else {
                         destBuffer[i] = (char) (ea.cs & 0xFF);
+                    }
                     break;
                 case PLANE_FIELD:
+                case FIELD_PLANE: // 16
                     destBuffer[i] = ea.isFieldAttribute() ? (char) (ea.fa & 0xFF) : 0;
                     break;
+                case PLANE_DBCS: // 6
+                    if (ea.db == ExtendedAttribute.DB_LEFT) {
+                        destBuffer[i] = (char) 0xC0;
+                    } else if (ea.db == ExtendedAttribute.DB_RIGHT) {
+                        destBuffer[i] = (char) 0x80;
+                    } else if (ea.db == ExtendedAttribute.DB_SO) {
+                        destBuffer[i] = (char) 0x20;
+                    } else if (ea.db == ExtendedAttribute.DB_SI) {
+                        destBuffer[i] = (char) 0x10;
+                    } else {
+                        destBuffer[i] = 0;
+                    }
+                    break;
+                case GRID_PLANE: // 8 (HoD GRID_PLANE / Outlining)
+                    destBuffer[i] = (char) (ea.ol & 0xFF);
+                    break;
                 default:
                     destBuffer[i] = ' ';
                     break;
@@ -292,6 +325,107 @@ public class ECLPS implements ECLConstants {
         return copyLen;
     }
 
+    public synchronized boolean IsDBCSChar(int pos) {
+        if (screen == null) return false;
+        int size = getSize();
+        if (size <= 0) return false;
+        pos = ((pos % size) + size) % size;
+        ExtendedAttribute ea = screen.getCell(pos);
+        return ea != null && (ea.db == ExtendedAttribute.DB_LEFT || ea.db == ExtendedAttribute.DB_RIGHT);
+    }
+
+    public synchronized boolean isDBCSChar(int pos) {
+        return IsDBCSChar(pos);
+    }
+
+    public synchronized boolean IsDBCSChar(int row, int col) {
+        if (screen == null) return false;
+        return IsDBCSChar(screen.rowColToAddress(row, col));
+    }
+
+    public synchronized boolean isDBCSChar(int row, int col) {
+        return IsDBCSChar(row, col);
+    }
+
+    public synchronized boolean IsDBCS1stChar(int pos) {
+        if (screen == null) return false;
+        int size = getSize();
+        if (size <= 0) return false;
+        pos = ((pos % size) + size) % size;
+        ExtendedAttribute ea = screen.getCell(pos);
+        return ea != null && ea.db == ExtendedAttribute.DB_LEFT;
+    }
+
+    public synchronized boolean isDBCS1stChar(int pos) {
+        return IsDBCS1stChar(pos);
+    }
+
+    public synchronized boolean IsDBCS1stChar(int row, int col) {
+        if (screen == null) return false;
+        return IsDBCS1stChar(screen.rowColToAddress(row, col));
+    }
+
+    public synchronized boolean isDBCS1stChar(int row, int col) {
+        return IsDBCS1stChar(row, col);
+    }
+
+    public synchronized boolean IsDBCS2ndChar(int pos) {
+        if (screen == null) return false;
+        int size = getSize();
+        if (size <= 0) return false;
+        pos = ((pos % size) + size) % size;
+        ExtendedAttribute ea = screen.getCell(pos);
+        return ea != null && ea.db == ExtendedAttribute.DB_RIGHT;
+    }
+
+    public synchronized boolean isDBCS2ndChar(int pos) {
+        return IsDBCS2ndChar(pos);
+    }
+
+    public synchronized boolean IsDBCS2ndChar(int row, int col) {
+        if (screen == null) return false;
+        return IsDBCS2ndChar(screen.rowColToAddress(row, col));
+    }
+
+    public synchronized boolean isDBCS2ndChar(int row, int col) {
+        return IsDBCS2ndChar(row, col);
+    }
+
+    public synchronized boolean IsSOChar(int pos) {
+        if (screen == null) return false;
+        int size = getSize();
+        if (size <= 0) return false;
+        pos = ((pos % size) + size) % size;
+        ExtendedAttribute ea = screen.getCell(pos);
+        return ea != null && (ea.db == ExtendedAttribute.DB_SO || (ea.ec & 0xFF) == 0x0E);
+    }
+
+    public synchronized boolean isSOChar(int pos) {
+        return IsSOChar(pos);
+    }
+
+    public synchronized boolean IsSIChar(int pos) {
+        if (screen == null) return false;
+        int size = getSize();
+        if (size <= 0) return false;
+        pos = ((pos % size) + size) % size;
+        ExtendedAttribute ea = screen.getCell(pos);
+        return ea != null && (ea.db == ExtendedAttribute.DB_SI || (ea.ec & 0xFF) == 0x0F);
+    }
+
+    public synchronized boolean isSIChar(int pos) {
+        return IsSIChar(pos);
+    }
+
+    public synchronized boolean IsSOSIChar(int pos) {
+        return IsSOChar(pos) || IsSIChar(pos);
+    }
+
+    public synchronized boolean isSOSIChar(int pos) {
+        return IsSOSIChar(pos);
+    }
+
+
     public synchronized int GetScreenRect(char[] cArray, int len, int sRow, int sCol, int eRow, int eCol, int plane) {
         if (cArray == null || len <= 0 || screen == null) return 0;
         int minR = Math.max(1, Math.min(sRow, eRow));

lib3270j/src/main/java/haus/nightmare/lib3270j/ft/FTConfig.java

@@ -9,10 +9,11 @@ import java.util.regex.Pattern;
  */
 public class FTConfig {
 
-    private static final Pattern RECFM_PATTERN = Pattern.compile("(?i)RECFM[\\s\\(]+([FVU]|FIXED|VARIABLE|UNDEFINED)\\)?");
+    private static final Pattern RECFM_PATTERN = Pattern.compile("(?i)RECFM[\\s\\(]+([FVU]|FB|VB|VBS|FBS|FIXED|VARIABLE|UNDEFINED)\\)?");
     private static final Pattern LRECL_PATTERN = Pattern.compile("(?i)LRECL[\\s\\(]+(\\d+)\\)?");
     private static final Pattern BLK_PATTERN = Pattern.compile("(?i)(?:BLKSIZE|BLOCK)[\\s\\(]+(\\d+)\\)?");
-    private static final Pattern SPACE_PATTERN = Pattern.compile("(?i)SPACE[\\s\\(]+(\\d+)(?:[\\s,]+(\\d+))?\\)?");
+    private static final Pattern SPACE_PATTERN = Pattern.compile("(?i)SPACE[\\s\\(]+(\\d+)(?:[\\s,]+(\\d+))?(?:[\\s,]+(\\d+))?\\)?");
+    private static final Pattern DIR_PATTERN = Pattern.compile("(?i)(?:DIR|DIRECTORY)[\\s\\(]+(\\d+)\\)?");
     private static final Pattern AVB_PATTERN = Pattern.compile("(?i)AVBLOCK[\\s\\(]+(\\d+)\\)?");
     private static final Pattern CP_PATTERN = Pattern.compile("(?i)CODEPAGE[\\s\\(]+([A-Za-z0-9_-]+)\\)?");
     private static final Pattern MTU_PATTERN = Pattern.compile("(?i)(?:BUFFERSIZE|MTU|BUFSIZE)[\\s\\(]+(\\d+)\\)?");
@@ -68,6 +69,7 @@ public class FTConfig {
     private int blksize = 0;
     private int primarySpace = 0;
     private int secondarySpace = 0;
+    private int directoryBlocks = 0;
     private int avblock = 0;
     private int dftBufferSize = FTConstants.DFT_BUF;
     private String otherOptions = null;
@@ -172,6 +174,20 @@ public class FTConfig {
     public int getSecondarySpace() { return secondarySpace; }
     public void setSecondarySpace(int secondarySpace) { this.secondarySpace = secondarySpace; }
 
+    public int getDirectoryBlocks() { return directoryBlocks; }
+    public void setDirectoryBlocks(int directoryBlocks) { this.directoryBlocks = Math.max(0, directoryBlocks); }
+    public void setDirectoryBlocks(String dir) {
+        if (dir == null || dir.trim().isEmpty()) {
+            this.directoryBlocks = 0;
+            return;
+        }
+        try {
+            this.directoryBlocks = Math.max(0, Integer.parseInt(dir.trim()));
+        } catch (NumberFormatException e) {
+            this.directoryBlocks = 0;
+        }
+    }
+
     public int getAvblock() { return avblock; }
     public void setAvblock(int avblock) { this.avblock = avblock; }
 
@@ -217,9 +233,9 @@ public class FTConfig {
             this.recfm = RecordFormat.DEFAULT;
         } else {
             String u = r.trim().toUpperCase();
-            if (u.equals("F") || u.startsWith("FIXED")) this.recfm = RecordFormat.FIXED;
-            else if (u.equals("V") || u.startsWith("VAR")) this.recfm = RecordFormat.VARIABLE;
-            else if (u.equals("U") || u.startsWith("UNDEF")) this.recfm = RecordFormat.UNDEFINED;
+            if (u.startsWith("F") || u.startsWith("FIXED")) this.recfm = RecordFormat.FIXED;
+            else if (u.startsWith("V") || u.startsWith("VAR")) this.recfm = RecordFormat.VARIABLE;
+            else if (u.startsWith("U") || u.startsWith("UNDEF")) this.recfm = RecordFormat.UNDEFINED;
             else this.recfm = RecordFormat.DEFAULT;
         }
     }
@@ -233,14 +249,23 @@ public class FTConfig {
     }
 
     public void setSpace(String s) {
-        // Space string like "10,5" for primary/secondary
+        // Space string like "10,5" or "10,5,10" for primary/secondary/directory
         if (s == null || s.trim().isEmpty()) return;
         String[] parts = s.split(",");
         try {
-            if (parts.length > 0) this.primarySpace = Integer.parseInt(parts[0].trim());
-            if (parts.length > 1) this.secondarySpace = Integer.parseInt(parts[1].trim());
-        } catch (NumberFormatException e) {
-            // ignore
+            if (parts.length > 0 && !parts[0].trim().isEmpty()) {
+                this.primarySpace = Integer.parseInt(parts[0].trim());
+                if (this.units == AllocationUnit.DEFAULT) {
+                    this.units = AllocationUnit.TRACKS;
+                }
+            }
+            if (parts.length > 1 && !parts[1].trim().isEmpty()) {
+                this.secondarySpace = Integer.parseInt(parts[1].trim());
+            }
+            if (parts.length > 2 && !parts[2].trim().isEmpty()) {
+                this.directoryBlocks = Math.max(0, Integer.parseInt(parts[2].trim()));
+            }
+        } catch (NumberFormatException ignored) {
         }
     }
 
@@ -279,6 +304,22 @@ public class FTConfig {
                 if (spaceMatcher.group(2) != null) {
                     this.secondarySpace = Integer.parseInt(spaceMatcher.group(2));
                 }
+                if (spaceMatcher.group(3) != null) {
+                    this.directoryBlocks = Math.max(0, Integer.parseInt(spaceMatcher.group(3)));
+                }
+                if (this.units == AllocationUnit.DEFAULT) {
+                    this.units = AllocationUnit.TRACKS;
+                }
+            } catch (NumberFormatException ignored) {}
+        }
+
+        Matcher dirMatcher = DIR_PATTERN.matcher(trimmed);
+        if (dirMatcher.find()) {
+            try {
+                this.directoryBlocks = Math.max(0, Integer.parseInt(dirMatcher.group(1)));
+                if (this.units == AllocationUnit.DEFAULT) {
+                    this.units = AllocationUnit.TRACKS;
+                }
             } catch (NumberFormatException ignored) {}
         }
 
@@ -501,7 +542,12 @@ public class FTConfig {
         StringBuilder cmd = new StringBuilder();
 
         // Host program selection: IND$FILE or APVUFILE
-        cmd.append(getProgramName()).append(" ");
+        // For TSO, prefix with "TSO " so it can be called from any ISPF command line or native prompt
+        String prog = getProgramName();
+        if (hostType == HostType.TSO && !prog.toUpperCase().startsWith("TSO ")) {
+            cmd.append("TSO ");
+        }
+        cmd.append(prog).append(" ");
         cmd.append(isReceive() ? "GET " : "PUT ");
         cmd.append(hostFilename != null ? hostFilename.trim() : "");
 
@@ -568,14 +614,18 @@ public class FTConfig {
                         opts.append(" BLKSIZE(").append(blksize).append(")");
                     }
                 }
-                if (units != AllocationUnit.DEFAULT) {
+                if (units != AllocationUnit.DEFAULT || primarySpace > 0 || directoryBlocks > 0) {
+                    AllocationUnit effectiveUnits = (units != AllocationUnit.DEFAULT) ? units : AllocationUnit.TRACKS;
                     if (opts.length() > 0) opts.append(" ");
                     opts.append("SPACE(").append(primarySpace);
-                    if (secondarySpace > 0) {
+                    if (secondarySpace > 0 || directoryBlocks > 0) {
                         opts.append(",").append(secondarySpace);
                     }
+                    if (directoryBlocks > 0) {
+                        opts.append(",").append(directoryBlocks);
+                    }
                     opts.append(")");
-                    switch (units) {
+                    switch (effectiveUnits) {
                         case TRACKS:    opts.append(" TRACKS"); break;
                         case CYLINDERS: opts.append(" CYLINDERS"); break;
                         case AVBLOCK:   opts.append(" AVBLOCK(").append(avblock).append(")"); break;

lib3270j/src/main/java/haus/nightmare/lib3270j/ft/FTDft.java

@@ -816,15 +816,14 @@ public class FTDft {
 
         for (int i = 0; i < lineStr.length(); i++) {
             char ch = lineStr.charAt(i);
-            int ebc = translator != null ? translator.unicodeToEbcdic(ch) : -1;
-            boolean charIsDbcs = isDbcs && (ch > 0xFF || ebc > 0xFF);
-            if (charIsDbcs) {
+            int dbcsVal = (isDbcs && translator != null) ? translator.unicodeToDbcs(ch) : -1;
+            if (dbcsVal != -1) {
                 if (!inDbcsState && !noSo) {
                     converted.write(0x0E); // Shift-Out
                     inDbcsState = true;
                 }
-                converted.write((ebc >> 8) & 0xFF);
-                converted.write(ebc & 0xFF);
+                converted.write((dbcsVal >> 8) & 0xFF);
+                converted.write(dbcsVal & 0xFF);
             } else {
                 if (inDbcsState && !noSo) {
                     converted.write(0x0F); // Shift-In

lib3270j/src/main/java/haus/nightmare/lib3270j/ft/dir/CMSDirectoryParser.java

@@ -17,7 +17,7 @@ public class CMSDirectoryParser {
             return entries;
         }
 
-        String[] lines = text.split("\r?\n");
+        String[] lines = splitIntoLines(text);
 
         for (String line : lines) {
             String trimmed = line.trim();
@@ -26,6 +26,16 @@ public class CMSDirectoryParser {
 
             String upper = trimmed.toUpperCase();
             if (upper.startsWith("FILENAME") || upper.startsWith("DIRECTORY") || upper.startsWith("FILELIST")) continue;
+            if (upper.startsWith("READY;") || upper.startsWith("READY(") || upper.equals("READY")
+                    || upper.startsWith("MORE...") || upper.startsWith("HOLDING")
+                    || upper.startsWith("RUNNING") || upper.equals("RUNNING")
+                    || upper.startsWith("DMSLST") || upper.startsWith("DMS")) continue;
+
+            if (upper.endsWith("MORE...") || upper.endsWith("HOLDING") || upper.endsWith("RUNNING")) {
+                int idx = Math.max(upper.lastIndexOf("MORE..."), Math.max(upper.lastIndexOf("HOLDING"), upper.lastIndexOf("RUNNING")));
+                trimmed = trimmed.substring(0, idx).trim();
+                if (trimmed.isEmpty()) continue;
+            }
 
             CMSDirectoryEntry entry = parseCmsLine(trimmed);
             if (entry != null) {
@@ -36,6 +46,24 @@ public class CMSDirectoryParser {
         return entries;
     }
 
+    private static String[] splitIntoLines(String text) {
+        if (text.contains("\n") || text.contains("\r")) {
+            return text.split("\r?\n");
+        }
+        if (text.length() >= 80) {
+            int lineLen = (text.length() % 132 == 0 && text.length() % 80 != 0) ? 132 : 80;
+            int numLines = (text.length() + lineLen - 1) / lineLen;
+            String[] lines = new String[numLines];
+            for (int i = 0; i < numLines; i++) {
+                int start = i * lineLen;
+                int end = Math.min(start + lineLen, text.length());
+                lines[i] = text.substring(start, end);
+            }
+            return lines;
+        }
+        return new String[]{text};
+    }
+
     private static CMSDirectoryEntry parseCmsLine(String line) {
         String[] tokens = line.split("\\s+");
         if (tokens.length < 2) return null;

lib3270j/src/main/java/haus/nightmare/lib3270j/ft/dir/TSODirectoryParser.java

@@ -11,12 +11,16 @@ import java.util.regex.Pattern;
 public class TSODirectoryParser {
 
     private static final Pattern DSN_PATTERN = Pattern.compile("([A-Z0-9@#$]+(?:\\.[A-Z0-9@#$]+)+)");
-    private static final Pattern NONVSAM_PATTERN = Pattern.compile("NONVSAM\\s+-+\\s+([A-Z0-9@#$]+(?:\\.[A-Z0-9@#$]+)+)", Pattern.CASE_INSENSITIVE);
-    private static final Pattern VOLSER_PATTERN = Pattern.compile("VOLSER-+([A-Z0-9]+)", Pattern.CASE_INSENSITIVE);
-    private static final Pattern RECFM_PATTERN = Pattern.compile("RECFM-+([A-Z]+)", Pattern.CASE_INSENSITIVE);
-    private static final Pattern LRECL_PATTERN = Pattern.compile("LRECL-+([0-9]+)", Pattern.CASE_INSENSITIVE);
-    private static final Pattern BLKSIZE_PATTERN = Pattern.compile("BLKSIZE-+([0-9]+)", Pattern.CASE_INSENSITIVE);
-    private static final Pattern DSORG_PATTERN = Pattern.compile("DSORG-+([A-Z]+)", Pattern.CASE_INSENSITIVE);
+    private static final Pattern NONVSAM_PATTERN = Pattern.compile("(?:NONVSAM|CLUSTER|GDG|ALIAS|AIX|PATH)\\s*[-:=]+\\s*([A-Z0-9@#$]+(?:\\.[A-Z0-9@#$]+)*)", Pattern.CASE_INSENSITIVE);
+    private static final Pattern VOLSER_PATTERN = Pattern.compile("VOLSER\\s*[-:=]+\\s*([A-Z0-9*@#$&]+)", Pattern.CASE_INSENSITIVE);
+    private static final Pattern RECFM_PATTERN = Pattern.compile("RECFM\\s*[-:=]+\\s*([A-Z0-9,]+)", Pattern.CASE_INSENSITIVE);
+    private static final Pattern LRECL_PATTERN = Pattern.compile("(?:AVG|MAX)?LRECL\\s*[-:=]+\\s*([0-9]+)", Pattern.CASE_INSENSITIVE);
+    private static final Pattern BLKSIZE_PATTERN = Pattern.compile("(?:CISIZE|BLKSIZE)\\s*[-:=]+\\s*([0-9]+)", Pattern.CASE_INSENSITIVE);
+    private static final Pattern DSORG_PATTERN = Pattern.compile("DSORG\\s*[-:=]+\\s*([A-Z0-9\\-]+)", Pattern.CASE_INSENSITIVE);
+    private static final Pattern EXTENTS_PATTERN = Pattern.compile("(?:VOL-)?EXTENTS\\s*[-:=]+\\s*([0-9]+)", Pattern.CASE_INSENSITIVE);
+    private static final Pattern SPACE_PRI_PATTERN = Pattern.compile("(?:SPACE-PRI|ALLOC-PRM|ALLOC_PRM)\\s*[-:=]+\\s*([0-9]+)", Pattern.CASE_INSENSITIVE);
+    private static final Pattern SPACE_TYPE_PATTERN = Pattern.compile("SPACE-TYPE\\s*[-:=]+\\s*([A-Z]+)", Pattern.CASE_INSENSITIVE);
+    private static final Pattern TRACKS_PATTERN = Pattern.compile("(?:TRACKS|TRKS)\\s*[-:=]+\\s*([0-9]+)", Pattern.CASE_INSENSITIVE);
 
     /**
      * Parse raw text containing TSO dataset listings into a structured list of TSODirectoryEntry.
@@ -27,19 +31,27 @@ public class TSODirectoryParser {
             return entries;
         }
 
-        String[] lines = text.split("\r?\n");
+        String[] lines = splitIntoLines(text);
 
         // Check if text is LISTCAT format
-        if (text.toUpperCase().contains("NONVSAM") || text.toUpperCase().contains("IN-CAT")) {
+        if (text.toUpperCase().contains("NONVSAM") || text.toUpperCase().contains("IN-CAT") || text.toUpperCase().contains("IDCAMS")
+                || text.toUpperCase().contains("CLUSTER") || text.toUpperCase().contains("GDG")) {
             parseListcat(lines, entries);
             if (!entries.isEmpty()) return entries;
         }
 
+        // Check if text is LISTDS format
+        if (text.toUpperCase().contains("--RECFM-") || text.toUpperCase().contains("--VOLUMES--")) {
+            parseListds(lines, entries);
+            if (!entries.isEmpty()) return entries;
+        }
+
         // Check for ISPF DSLIST or general tabular format
         for (String line : lines) {
             String trimmed = line.trim();
             if (trimmed.isEmpty()) continue;
-            if (trimmed.startsWith("--") || trimmed.startsWith("==") || trimmed.startsWith("**")) continue;
+            if (trimmed.startsWith("--") || trimmed.startsWith("==") || trimmed.startsWith("**") || trimmed.startsWith("***")) continue;
+            if (trimmed.equalsIgnoreCase("READY") || trimmed.toUpperCase().startsWith("READY;")) continue;
             if (trimmed.toUpperCase().startsWith("COMMAND") || trimmed.toUpperCase().startsWith("DSLIST") || trimmed.toUpperCase().startsWith("DATA SETS")) continue;
 
             TSODirectoryEntry entry = parseTabularLine(trimmed);
@@ -51,38 +63,196 @@ public class TSODirectoryParser {
         return entries;
     }
 
+    private static String[] splitIntoLines(String text) {
+        if (text.contains("\n") || text.contains("\r")) {
+            return text.split("\r?\n");
+        }
+        if (text.length() >= 80) {
+            int lineLen = (text.length() % 132 == 0 && text.length() % 80 != 0) ? 132 : 80;
+            int numLines = (text.length() + lineLen - 1) / lineLen;
+            String[] lines = new String[numLines];
+            for (int i = 0; i < numLines; i++) {
+                int start = i * lineLen;
+                int end = Math.min(start + lineLen, text.length());
+                lines[i] = text.substring(start, end);
+            }
+            return lines;
+        }
+        return new String[]{text};
+    }
+
     private static void parseListcat(String[] lines, List<TSODirectoryEntry> entries) {
         TSODirectoryEntry current = null;
+        String currentSpaceType = null;
         for (String line : lines) {
             String upper = line.toUpperCase();
             Matcher nonvsamMat = NONVSAM_PATTERN.matcher(upper);
             if (nonvsamMat.find()) {
                 if (current != null && current.getName() != null) {
+                    if (current.getTracksAllocated() > 0 && current.getExtents() == 0) {
+                        current.setExtents(1);
+                    }
                     entries.add(current);
                 }
                 current = new TSODirectoryEntry(nonvsamMat.group(1));
+                if (upper.contains("CLUSTER") || upper.contains("AIX") || upper.contains("PATH")) {
+                    current.setDsorg("VSAM");
+                }
+                currentSpaceType = null;
                 continue;
             }
 
             if (current != null) {
                 Matcher volMat = VOLSER_PATTERN.matcher(upper);
-                if (volMat.find()) current.setVolume(volMat.group(1));
+                if (volMat.find() && current.getVolume() == null) current.setVolume(volMat.group(1));
 
                 Matcher recMat = RECFM_PATTERN.matcher(upper);
-                if (recMat.find()) current.setRecfm(recMat.group(1));
+                if (recMat.find()) {
+                    String raw = recMat.group(1).toUpperCase();
+                    if (raw.contains("VAR") && raw.contains("BLOCK")) current.setRecfm("VB");
+                    else if (raw.contains("FIX") && raw.contains("BLOCK")) current.setRecfm("FB");
+                    else if (raw.contains("VAR")) current.setRecfm("V");
+                    else if (raw.contains("FIX")) current.setRecfm("F");
+                    else if (raw.contains("UNDEF")) current.setRecfm("U");
+                    else current.setRecfm(raw);
+                }
 
                 Matcher lreclMat = LRECL_PATTERN.matcher(upper);
-                if (lreclMat.find()) {
+                if (lreclMat.find() && current.getLrecl() == 0) {
                     try { current.setLrecl(Integer.parseInt(lreclMat.group(1))); } catch (NumberFormatException ignored) {}
                 }
 
                 Matcher blkMat = BLKSIZE_PATTERN.matcher(upper);
-                if (blkMat.find()) {
+                if (blkMat.find() && current.getBlksize() == 0) {
                     try { current.setBlksize(Integer.parseInt(blkMat.group(1))); } catch (NumberFormatException ignored) {}
                 }
 
                 Matcher dsorgMat = DSORG_PATTERN.matcher(upper);
-                if (dsorgMat.find()) current.setDsorg(dsorgMat.group(1));
+                if (dsorgMat.find() && current.getDsorg() == null) current.setDsorg(dsorgMat.group(1));
+
+                Matcher extMat = EXTENTS_PATTERN.matcher(upper);
+                if (extMat.find() && current.getExtents() == 0) {
+                    try { current.setExtents(Integer.parseInt(extMat.group(1))); } catch (NumberFormatException ignored) {}
+                }
+
+                Matcher typeMat = SPACE_TYPE_PATTERN.matcher(upper);
+                if (typeMat.find()) {
+                    currentSpaceType = typeMat.group(1);
+                }
+
+                Matcher trkMat = TRACKS_PATTERN.matcher(upper);
+                if (trkMat.find() && current.getTracksAllocated() == 0) {
+                    try { current.setTracksAllocated(Integer.parseInt(trkMat.group(1))); } catch (NumberFormatException ignored) {}
+                } else {
+                    Matcher priMat = SPACE_PRI_PATTERN.matcher(upper);
+                    if (priMat.find() && current.getTracksAllocated() == 0) {
+                        try {
+                            int pri = Integer.parseInt(priMat.group(1));
+                            if (currentSpaceType != null && currentSpaceType.startsWith("CYL")) {
+                                pri = pri * 15;
+                            }
+                            current.setTracksAllocated(pri);
+                        } catch (NumberFormatException ignored) {}
+                    }
+                }
+            }
+        }
+        if (current != null && current.getName() != null) {
+            if (current.getTracksAllocated() > 0 && current.getExtents() == 0) {
+                current.setExtents(1);
+            }
+            entries.add(current);
+        }
+    }
+
+    private static void parseListds(String[] lines, List<TSODirectoryEntry> entries) {
+        TSODirectoryEntry current = null;
+        boolean inRecfm = false;
+        boolean inVol = false;
+
+        for (String line : lines) {
+            String trimmed = line.trim();
+            if (trimmed.isEmpty()) continue;
+            String upper = trimmed.toUpperCase();
+
+            if (upper.startsWith("--RECFM-")) {
+                inRecfm = true;
+                inVol = false;
+                continue;
+            }
+            if (upper.startsWith("--VOLUMES--")) {
+                inVol = true;
+                inRecfm = false;
+                continue;
+            }
+            if (upper.startsWith("--ALLOCATION") || upper.startsWith("--TRACKS-")) {
+                inRecfm = false;
+                inVol = false;
+                continue;
+            }
+
+            if (inRecfm && current != null) {
+                String[] toks = trimmed.split("\\s+");
+                if (toks.length >= 1 && toks[0].matches("^[A-Z]+$")) current.setRecfm(toks[0]);
+                if (toks.length >= 2 && toks[1].matches("^\\d+$")) {
+                    try { current.setLrecl(Integer.parseInt(toks[1])); } catch (NumberFormatException ignored) {}
+                }
+                if (toks.length >= 3 && toks[2].matches("^\\d+$")) {
+                    try { current.setBlksize(Integer.parseInt(toks[2])); } catch (NumberFormatException ignored) {}
+                }
+                if (toks.length >= 4 && toks[3].matches("^[A-Z]+$")) current.setDsorg(toks[3]);
+                inRecfm = false;
+                continue;
+            }
+
+            if (inVol && current != null) {
+                String[] toks = trimmed.split("\\s+");
+                if (toks.length >= 1 && toks[0].matches("^[A-Z0-9*@#$&]{1,6}$")) {
+                    current.setVolume(toks[0]);
+                }
+                inVol = false;
+                continue;
+            }
+
+            if (current != null) {
+                Matcher trkMat = TRACKS_PATTERN.matcher(upper);
+                if (trkMat.find() && current.getTracksAllocated() == 0) {
+                    try { current.setTracksAllocated(Integer.parseInt(trkMat.group(1))); } catch (NumberFormatException ignored) {}
+                } else {
+                    Matcher priMat = SPACE_PRI_PATTERN.matcher(upper);
+                    if (priMat.find() && current.getTracksAllocated() == 0) {
+                        try { current.setTracksAllocated(Integer.parseInt(priMat.group(1))); } catch (NumberFormatException ignored) {}
+                    }
+                }
+
+                Matcher extMat = EXTENTS_PATTERN.matcher(upper);
+                if (extMat.find() && current.getExtents() == 0) {
+                    try { current.setExtents(Integer.parseInt(extMat.group(1))); } catch (NumberFormatException ignored) {}
+                }
+
+                // Check for tabular numbers row under --TRACKS-ALLOCATED-EXTENTS-
+                String[] numToks = trimmed.split("\\s+");
+                if (numToks.length >= 2 && numToks[0].matches("^\\d+$") && numToks[1].matches("^\\d+$")) {
+                    if (current.getTracksAllocated() == 0) {
+                        try { current.setTracksAllocated(Integer.parseInt(numToks[0])); } catch (NumberFormatException ignored) {}
+                    }
+                    if (current.getExtents() == 0) {
+                        try { current.setExtents(Integer.parseInt(numToks[1])); } catch (NumberFormatException ignored) {}
+                    }
+                }
+            }
+
+            String[] toks = trimmed.split("\\s+");
+            if (toks.length > 0) {
+                String cleanTok = toks[0].replace("'", "").replace("\"", "");
+                if (DSN_PATTERN.matcher(cleanTok.toUpperCase()).matches()) {
+                    if (current != null && current.getName() != null) {
+                        entries.add(current);
+                    }
+                    current = new TSODirectoryEntry(cleanTok.toUpperCase());
+                    inRecfm = false;
+                    inVol = false;
+                }
             }
         }
         if (current != null && current.getName() != null) {
@@ -108,6 +278,8 @@ public class TSODirectoryParser {
 
         TSODirectoryEntry entry = new TSODirectoryEntry(tokens[dsnIdx].toUpperCase());
         boolean seenFormat = false;
+        int numBeforeFormat = 0;
+        int numAfterFormat = 0;
 
         // Parse remaining tokens
         for (int i = 0; i < tokens.length; i++) {
@@ -117,7 +289,7 @@ public class TSODirectoryParser {
             if (tok.matches("^(PS|PO|PO-E|VSAM|DA|IS)$")) {
                 entry.setDsorg(tok);
                 seenFormat = true;
-            } else if (tok.matches("^(F|FB|V|VB|U|VBS|FBS)$")) {
+            } else if (tok.matches("^(F|FB|V|VB|U|VBS|FBS|FBA|VBA|FA|VA|FBM|VBM)$")) {
                 entry.setRecfm(tok);
                 seenFormat = true;
             } else if (tok.matches("^(3390|3380|TAPE|VIO)$")) {
@@ -129,23 +301,29 @@ public class TSODirectoryParser {
                 } else {
                     entry.setReferencedDate(tok);
                 }
-            } else if (tok.matches("^[A-Z0-9]{6}$") && entry.getVolume() == null && !tok.matches("^\\d+$")) {
+            } else if (tok.matches("^[A-Z0-9*@#$&]{1,6}$") && entry.getVolume() == null && !tok.matches("^\\d+$")
+                    && !tok.matches("^(PAGE|TOTAL|TRACKS|TRKS|EXTENTS|VOLUME|DSORG|RECFM|DATASET|NAME|DSN)$")) {
                 entry.setVolume(tok);
             } else if (tok.matches("^\\d+$")) {
                 int val = Integer.parseInt(tok);
                 if (!seenFormat) {
-                    if (entry.getTracksAllocated() == 0) {
+                    if (numBeforeFormat == 0) {
                         entry.setTracksAllocated(val);
-                    } else if (entry.getPercentUsed() == 0 && val <= 100) {
+                        numBeforeFormat++;
+                    } else if (numBeforeFormat == 1 && val <= 100) {
                         entry.setPercentUsed(val);
-                    } else if (entry.getExtents() == 0 && val <= 128) {
+                        numBeforeFormat++;
+                    } else if (numBeforeFormat <= 2 && val <= 128) {
                         entry.setExtents(val);
+                        numBeforeFormat++;
                     }
                 } else {
-                    if (entry.getLrecl() == 0 && val <= 32760) {
+                    if (numAfterFormat == 0 && val <= 32760) {
                         entry.setLrecl(val);
-                    } else if (entry.getBlksize() == 0 && val <= 32760) {
+                        numAfterFormat++;
+                    } else if (numAfterFormat == 1 && val <= 32760) {
                         entry.setBlksize(val);
+                        numAfterFormat++;
                     } else if (entry.getTracksAllocated() == 0) {
                         entry.setTracksAllocated(val);
                     }
@@ -153,6 +331,10 @@ public class TSODirectoryParser {
             }
         }
 
+        if (entry.getTracksAllocated() > 0 && entry.getExtents() == 0) {
+            entry.setExtents(1);
+        }
+
         return entry;
     }
 }

lib3270j/src/main/java/haus/nightmare/lib3270j/input/InputProcessor.java

@@ -129,6 +129,9 @@ public class InputProcessor {
                 lockStateListener.onLockStateChanged(locked);
             }
         }
+        if (!locked) {
+            this.lastAid = AID_NO;
+        }
     }
     public boolean isInsertMode() { return insertMode; }
     public void setInsertMode(boolean insert) {
@@ -292,9 +295,10 @@ public class InputProcessor {
             }
         }
 
-        // Translate character to EBCDIC (or APL Graphic Escape if in APL Keyboard Mode)
+        // Translate character to EBCDIC (or APL Graphic Escape if in APL Keyboard Mode, or DBCS)
         boolean isAplChar = false;
         int ebc = -1;
+        int dbcs = -1;
         if (aplKeyboardMode) {
             int aplCode = getAplCodeForChar(ch);
             if (aplCode >= 0) {
@@ -303,10 +307,62 @@ public class InputProcessor {
                 isAplChar = true;
             }
         }
-        if (ebc < 0) {
-            ebc = translator.unicodeToEbcdic(ch);
+        if (ebc < 0 && translator != null && translator.isDBCS()) {
+            dbcs = translator.unicodeToDbcs(ch);
+        }
+        if (ebc < 0 && dbcs < 0) {
+            ebc = (translator != null) ? translator.unicodeToEbcdic(ch) : (int) ch;
+        }
+        if (ebc < 0 && dbcs < 0) return;
+
+        if (dbcs >= 0) {
+            // DBCS character typing
+            if (insertMode) {
+                if (!screen.insertChar(baddr, ch)) {
+                    if (oia != null) {
+                        oia.setInputInhibited(ECLConstants.INHIBIT_OVERFLOW);
+                    }
+                    setKeyboardLocked(true);
+                    return;
+                }
+            } else {
+                int nextPos = screen.incrementAddress(baddr);
+                if (screen.isFormatted() && screen.getCell(nextPos).isFieldAttribute()) {
+                    // Cannot fit 2-cell DBCS at the last position of the field
+                    if (oia != null) {
+                        oia.setInputInhibited(ECLConstants.INHIBIT_OVERFLOW);
+                    }
+                    setKeyboardLocked(true);
+                    return;
+                }
+                int b1 = (dbcs >> 8) & 0xFF;
+                int b2 = dbcs & 0xFF;
+                ExtendedAttribute ea1 = screen.getCell(baddr);
+                ea1.fa = 0;
+                ea1.ec = (byte) b1;
+                ea1.ucs4 = ch;
+                ea1.cs = ExtendedAttribute.CS_DBCS;
+                ea1.db = ExtendedAttribute.DB_LEFT;
+
+                ExtendedAttribute ea2 = screen.getCell(nextPos);
+                ea2.fa = 0;
+                ea2.ec = (byte) b2;
+                ea2.ucs4 = ch;
+                ea2.cs = ExtendedAttribute.CS_DBCS;
+                ea2.db = ExtendedAttribute.DB_RIGHT;
+
+                if (screen.isFormatted()) {
+                    int faAddr = screen.findFieldAttribute(baddr);
+                    if (faAddr >= 0) {
+                        screen.getCell(faAddr).fa = (byte) (screen.getCell(faAddr).fa | FA_MODIFY);
+                    }
+                }
+                screen.setCursorAddress(screen.incrementAddress(nextPos));
+            }
+            screen.markAllChanged();
+            screen.updateDisplaySnapshot();
+            return;
         }
-        if (ebc < 0) return;
 
         if (insertMode) {
             // Insert mode: shift characters right from cursor to end of field
@@ -703,7 +759,7 @@ public class InputProcessor {
      * Build inbound 3270 Read Modified data stream (AID + Cursor + SBA + Modified fields).
      */
     public byte[] buildReadModifiedInboundData() {
-        return buildReadModifiedInboundData(lastAid != 0 ? lastAid : AID_ENTER, false);
+        return buildReadModifiedInboundData(lastAid != 0 ? lastAid : AID_NO, false);
     }
 
     /**
@@ -1476,38 +1532,12 @@ public class InputProcessor {
     }
 
     public void deleteChar() {
-        if (!screen.isFormatted()) return;
         int addr = screen.getCursorAddress();
-        int size = screen.getRows() * screen.getCols();
-        if (size <= 0) return;
-        addr = ((addr % size) + size) % size;
-
-        // Cannot delete a field attribute
-        if (screen.getCell(addr).isFieldAttribute()) return;
-
+        if (screen.isFormatted()) {
             byte faVal = screen.getFieldAttributeAt(addr);
             if (faIsProtected(faVal & 0xFF)) return;
-
-        // Shift characters left within the field
-        int shiftAddr = addr;
-        int count = 0;
-        while (count < size) {
-            int next = screen.incrementAddress(shiftAddr);
-            if (screen.getCell(next).isFieldAttribute()) {
-                screen.getCell(shiftAddr).ec = 0;
-                screen.getCell(shiftAddr).ucs4 = 0;
-                break;
-            }
-            screen.getCell(shiftAddr).ec = screen.getCell(next).ec;
-            screen.getCell(shiftAddr).ucs4 = screen.getCell(next).ucs4;
-            shiftAddr = next;
-            count++;
-        }
-
-        int faAddr = screen.findFieldAttribute(addr);
-        if (faAddr >= 0) {
-            screen.getCell(faAddr).fa = (byte) (screen.getCell(faAddr).fa | FA_MODIFY);
         }
+        screen.deleteChar(addr);
         screen.markAllChanged();
         screen.updateDisplaySnapshot();
     }
@@ -1525,6 +1555,9 @@ public class InputProcessor {
                 return;
             }
         }
+        if (screen.getCell(prev).db == ExtendedAttribute.DB_RIGHT) {
+            prev = screen.decrementAddress(prev);
+        }
         screen.setCursorAddress(prev);
         deleteChar();
     }
@@ -1629,6 +1662,7 @@ public class InputProcessor {
     /** Reset (unlock keyboard, cancel insert mode, clear OIA error states). */
     public void reset() {
         setKeyboardLocked(false);
+        lastAid = AID_NO;
         insertMode = false;
         if (oia != null) {
             oia.setInputInhibited(ECLConstants.INHIBIT_NOT_INHIBITED);

lib3270j/src/main/java/haus/nightmare/lib3270j/screen/ExtendedAttribute.java

@@ -97,6 +97,11 @@ public class ExtendedAttribute {
     /** Validation attribute. */
     public byte vl;
 
+    // Transparency attribute values (0x46 / XA_TRANSPARENCY)
+    public static final byte TR_DEFAULT = 0x00;
+    public static final byte TR_OR      = (byte) 0xF0;
+    public static final byte TR_OPAQUE  = (byte) 0xFF;
+
     /** Transparency attribute. */
     public byte tr;
 

lib3270j/src/main/java/haus/nightmare/lib3270j/screen/ScreenBuffer.java

@@ -727,6 +727,14 @@ public class ScreenBuffer {
         for (int i = 0; i < size; i++) {
             ExtendedAttribute ea = buffer[i];
             if (!ea.isFieldAttribute()) {
+                if (ea.db == ExtendedAttribute.DB_LEFT || ea.db == ExtendedAttribute.DB_RIGHT) {
+                    // Preserve decoded DBCS character
+                    continue;
+                }
+                if (ea.db == ExtendedAttribute.DB_SO || ea.db == ExtendedAttribute.DB_SI) {
+                    ea.ucs4 = ' ';
+                    continue;
+                }
                 if (ea.ec == 0) {
                     ea.ucs4 = 0;
                 } else if (ea.cs == 1 || ea.cs == 0x04) {  // CS_APL or CS_GE
@@ -736,6 +744,9 @@ public class ScreenBuffer {
                 }
             }
         }
+        if (translator != null && translator.isDBCS()) {
+            processSOSI();
+        }
     }
 
     private char getAplGraphic(int ec) {
@@ -1124,7 +1135,7 @@ public class ScreenBuffer {
             int count = 0;
             while (count < size) {
                 int next = incrementAddress(shiftAddr);
-                if (getCell(next).isFieldAttribute()) {
+                if (getCell(next).isFieldAttribute() || count == size - 1) {
                     getCell(shiftAddr).clear();
                     break;
                 }

lib3270j/src/main/java/haus/nightmare/lib3270j/telnet/TelnetConnection.java

@@ -556,17 +556,42 @@ public class TelnetConnection {
         running = false;
         stopKeepAlive();
         try {
+            if (outputStream != null) {
+                try {
+                    outputStream.flush();
+                } catch (IOException ignored) {}
+            }
             if (socket != null && !socket.isClosed()) {
-                socket.shutdownInput();
+                try {
+                    if (!socket.isOutputShutdown()) {
                         socket.shutdownOutput();
+                    }
+                } catch (IOException ignored) {}
+
+                // Allow host a brief drain window to receive EOF / FIN-ACK
+                if (readerThread != null && readerThread.isAlive() && Thread.currentThread() != readerThread) {
+                    try {
+                        readerThread.join(200);
+                    } catch (InterruptedException e) {
+                        Thread.currentThread().interrupt();
+                    }
+                } else if (inputStream != null) {
+                    try {
+                        socket.setSoTimeout(100);
+                        byte[] b = new byte[256];
+                        while (inputStream.read(b) != -1) {}
+                    } catch (Throwable ignored) {}
+                }
                 socket.close();
             }
         } catch (IOException e) {
             log.log(Level.FINE, "Error during disconnect", e);
-        }
+        } finally {
             socket = null;
             inputStream = null;
             outputStream = null;
+            readerThread = null;
+        }
         log.info("Disconnected");
     }
 

lib3270j/src/main/java/haus/nightmare/lib3270j/telnet/TelnetFSM.java

@@ -1366,6 +1366,71 @@ public class TelnetFSM {
         sendRecord(resp);
     }
 
+    /**
+     * Send TN3270E UNBIND request to release LU session cleanly (RFC 2355 Section 9).
+     * @param reason SNA UNBIND reason code (e.g. UNBIND_NORMAL = 0x01)
+     */
+    public synchronized void sendUnbind(int reason) {
+        if (!tn3270eNegotiated || !tn3270eBound) {
+            return;
+        }
+        if (connection == null || !connection.isConnected()) {
+            return;
+        }
+        try {
+            byte[] unbindData = new byte[EH_SIZE + 1];
+            unbindData[0] = (byte) DT_UNBIND;
+            unbindData[1] = 0; // Request flags
+            unbindData[2] = (byte) RSF_NO_RESPONSE; // Response flags
+            unbindData[3] = (byte) ((eXmitSeq >> 8) & 0xFF);
+            unbindData[4] = (byte) (eXmitSeq & 0xFF);
+            unbindData[5] = (byte) (reason & 0xFF);
+            eXmitSeq = (eXmitSeq + 1) & 0xFFFF;
+            log.info("Sending TN3270E UNBIND reason=" + unbindReasonName(reason));
+            sendRecord(unbindData);
+            tn3270eBound = false;
+        } catch (Exception e) {
+            log.log(Level.FINE, "Failed to send TN3270E UNBIND", e);
+        }
+    }
+
+    /**
+     * Send graceful Telnet de-negotiation (UNBIND if bound, followed by WONT/DONT for active options).
+     */
+    public synchronized void sendTelnetDisconnect() {
+        if (connection == null || !connection.isConnected()) {
+            return;
+        }
+        try {
+            if (tn3270eNegotiated && tn3270eBound) {
+                sendUnbind(UNBIND_NORMAL);
+            }
+            // De-negotiate TN3270E first if active
+            if (myOpts[TELOPT_TN3270E]) {
+                sendCommand(WONT, TELOPT_TN3270E);
+                myOpts[TELOPT_TN3270E] = false;
+            }
+            if (hisOpts[TELOPT_TN3270E]) {
+                sendCommand(DONT, TELOPT_TN3270E);
+                hisOpts[TELOPT_TN3270E] = false;
+            }
+            // De-negotiate all other active options
+            for (int opt = 0; opt < 256; opt++) {
+                if (myOpts[opt]) {
+                    sendCommand(WONT, opt);
+                    myOpts[opt] = false;
+                }
+                if (hisOpts[opt]) {
+                    sendCommand(DONT, opt);
+                    hisOpts[opt] = false;
+                }
+            }
+            log.fine("Sent Telnet option de-negotiation");
+        } catch (Exception e) {
+            log.log(Level.FINE, "Error sending Telnet de-negotiation", e);
+        }
+    }
+
     // ========== Check if we should transition to 3270 mode ==========
 
     private void checkIn3270() {
@@ -1531,6 +1596,9 @@ public class TelnetFSM {
 
     private void changeState(ConnectionState newState) {
         ConnectionState old = this.connectionState;
+        if (old == newState) {
+            return;
+        }
         this.connectionState = newState;
         log.info("State: " + old + " -> " + newState);
         for (ConnectionListener l : connectionListeners) {

lib3270j/src/main/java/haus/nightmare/lib3270j/xfer/FileTransferFileObject.java

@@ -37,6 +37,7 @@ public class FileTransferFileObject implements Serializable {
     private int blksize = 0;
     private int primarySpace = 0;
     private int secondarySpace = 0;
+    private int directoryBlocks = 0;
     private int avblock = 0;
     private String options = "";
 
@@ -201,6 +202,14 @@ public class FileTransferFileObject implements Serializable {
         this.secondarySpace = secondarySpace;
     }
 
+    public int getDirectoryBlocks() {
+        return directoryBlocks;
+    }
+
+    public void setDirectoryBlocks(int directoryBlocks) {
+        this.directoryBlocks = Math.max(0, directoryBlocks);
+    }
+
     public int getAvblock() {
         return avblock;
     }
@@ -241,6 +250,7 @@ public class FileTransferFileObject implements Serializable {
         config.setBlksize(blksize);
         config.setPrimarySpace(primarySpace);
         config.setSecondarySpace(secondarySpace);
+        config.setDirectoryBlocks(directoryBlocks);
         config.setAvblock(avblock);
         if (options != null && !options.isEmpty()) {
             config.parseOptions(options);
@@ -263,6 +273,7 @@ public class FileTransferFileObject implements Serializable {
         this.blksize = config.getBlksize();
         this.primarySpace = config.getPrimarySpace();
         this.secondarySpace = config.getSecondarySpace();
+        this.directoryBlocks = config.getDirectoryBlocks();
         this.avblock = config.getAvblock();
     }
 

lib3270j/src/main/java/haus/nightmare/lib3270j/xfer3270/Xfer3270.java

@@ -603,10 +603,260 @@ public class Xfer3270 implements FileTransferInterface {
         if (callback != null) callback.setStatus(FileTransferHostDirectoryInterface.STATUS_PROCESSING);
         Vector result = new Vector();
 
+        String dataToParse = hostQuery;
+        if (hostQuery == null || (!hostQuery.contains("\n") && !hostQuery.contains("\r")
+                && !hostQuery.toUpperCase().contains("NONVSAM") && !hostQuery.toUpperCase().contains("IN-CAT")
+                && !hostQuery.toUpperCase().contains("FORMAT"))) {
+            if (session != null && session.getPS() != null) {
+                try {
+                    ECLPS ps = session.getPS();
+                    ScreenBuffer sb = ps.getScreenBuffer();
+                    StringBuilder sbAll = new StringBuilder();
+                    int maxPages = 500;
+
+                    if (hostType == VM_CMS) {
+                        ps.SendKeys("[clear]");
+                        if (session.getOIA() != null) {
+                            session.getOIA().waitForInput(3000);
+                        }
+                        String filter;
+                        if (hostQuery == null || hostQuery.trim().isEmpty()) {
+                            filter = "* * A";
+                        } else {
+                            String clean = hostQuery.replace("'", "").replace("\"", "").trim();
+                            if (clean.equals("* * *") || clean.equals("*")) {
+                                filter = "* * A";
+                            } else if (clean.contains(".")) {
+                                int dot = clean.indexOf('.');
+                                filter = clean.substring(0, dot).trim() + " " + clean.substring(dot + 1).trim() + " A";
+                            } else {
+                                String[] parts = clean.split("\\s+");
+                                if (parts.length == 1) {
+                                    filter = parts[0] + " * A";
+                                } else if (parts.length == 2) {
+                                    filter = parts[0] + " " + parts[1] + " A";
+                                } else {
+                                    filter = parts[0] + " " + parts[1] + " " + parts[2];
+                                }
+                            }
+                        }
+                        ps.SendKeys("LISTFILE " + filter + " ( nohead alloc date[enter]");
+                        try { Thread.sleep(100); } catch (InterruptedException ignored) {}
+
+                        for (int page = 0; page < maxPages; page++) {
+                            long startWait = System.currentTimeMillis();
+                            long timeoutMs = 10000;
+                            String screen = "";
+                            boolean isMore = false;
+
+                            while (System.currentTimeMillis() - startWait < timeoutMs) {
+                                if (session.getOIA() != null) {
+                                    session.getOIA().waitForInput(500);
+                                }
+                                int rows = ps.getRows();
+                                int cols = ps.getCols();
+                                screen = ps.copyString(0, 0, rows - 1, cols - 1);
+                                String upper = screen.toUpperCase();
+
+                                if (upper.contains("MORE...") || upper.contains("HOLDING")) {
+                                    isMore = true;
+                                    break;
+                                }
+                                if (upper.contains("READY;") || upper.contains("READY(")) {
+                                    break;
+                                }
+                                try { Thread.sleep(150); } catch (InterruptedException ignored) {}
+                            }
+
+                            sbAll.append(screen).append("\n");
+
+                            if (isMore) {
+                                ps.SendKeys("[clear]");
+                                try { Thread.sleep(100); } catch (InterruptedException ignored) {}
+                                if (session.getOIA() != null) {
+                                    session.getOIA().waitForInput(3000);
+                                }
+                            } else {
+                                break;
+                            }
+                        }
+
+                        // Automatically clear the listing from the terminal presentation space
+                        ps.SendKeys("[clear]");
+                        if (session.getOIA() != null) {
+                            try { Thread.sleep(100); } catch (InterruptedException ignored) {}
+                            session.getOIA().waitForInput(3000);
+                        }
+
+                    } else {
+                        // TSO
+                        int rows = ps.getRows();
+                        int cols = ps.getCols();
+                        String initialScreen = ps.copyString(0, 0, rows - 1, cols - 1);
+                        boolean isFormatted = sb != null && sb.isFormatted();
+                        boolean hasCmdArrow = initialScreen.contains("===>");
+                        boolean isIspf = isFormatted || hasCmdArrow || initialScreen.contains("ISPF");
+
+                        String filter = (hostQuery != null && !hostQuery.trim().isEmpty()) ? hostQuery.trim() : "";
+                        String tsoCmd = "TSO LISTCAT ALL";
+                        if (!filter.isEmpty()) {
+                            if (filter.startsWith("'") && filter.endsWith("'") && filter.length() > 2) {
+                                filter = filter.substring(1, filter.length() - 1);
+                            }
+                            int paren = filter.indexOf('(');
+                            if (paren > 0) filter = filter.substring(0, paren);
+                            if (filter.equals("*") || filter.equals("* * *") || filter.equals("*.*")) {
+                                tsoCmd = "TSO LISTCAT ALL";
+                            } else {
+                                String level = filter;
+                                if (level.endsWith(".*")) {
+                                    level = level.substring(0, level.length() - 2);
+                                } else if (level.endsWith("*")) {
+                                    level = level.substring(0, level.length() - 1);
+                                }
+                                if (level.isEmpty()) {
+                                    tsoCmd = "TSO LISTCAT ALL";
+                                } else {
+                                    tsoCmd = "TSO LISTCAT LEVEL(" + level + ") ALL";
+                                }
+                            }
+                        }
+
+                        if (isIspf) {
+                            int arrowPos = initialScreen.indexOf("===>");
+                            if (arrowPos >= 0 && sb != null) {
+                                int inputAddr = sb.findNextUnprotected(arrowPos);
+                                if (inputAddr > 0) {
+                                    sb.setCursorAddress(inputAddr);
+                                    sb.updateDisplaySnapshot();
+                                } else {
+                                    ps.SendKeys("[home]");
+                                }
+                            } else {
+                                ps.SendKeys("[home]");
+                            }
+                            ps.SendKeys("[erase_eof]");
+                            ps.SendKeys(tsoCmd + "[enter]");
+                        } else {
+                            ps.SendKeys("[clear]");
+                            if (session.getOIA() != null) {
+                                session.getOIA().waitForInput(3000);
+                            }
+                            ps.SendKeys(tsoCmd + "[enter]");
+                        }
+
+                        try { Thread.sleep(100); } catch (InterruptedException ignored) {}
+
+                        // Wait for output to start appearing
+                        long startCmd = System.currentTimeMillis();
+                        while (System.currentTimeMillis() - startCmd < 4000) {
+                            if (session.getOIA() != null) {
+                                session.getOIA().waitForInput(200);
+                            }
+                            int r = ps.getRows();
+                            int c = ps.getCols();
+                            String s = ps.copyString(0, 0, r - 1, c - 1);
+                            String u = s.toUpperCase();
+                            if (u.contains("NONVSAM") || u.contains("CLUSTER") || u.contains("GDG")
+                                    || u.contains("ALIAS") || u.contains("IN-CAT") || u.contains("IDCAMS")
+                                    || u.contains("***") || u.contains("READY") || u.contains("NOT FOUND")
+                                    || u.contains("NO ENTRY") || s.contains(" --- ")) {
+                                break;
+                            }
+                            try { Thread.sleep(80); } catch (InterruptedException ignored) {}
+                        }
+
+                        String prevScreen = "";
+                        for (int page = 0; page < maxPages; page++) {
+                            if (session.getOIA() != null) {
+                                session.getOIA().waitForInput(300);
+                            }
+                            int r = ps.getRows();
+                            int c = ps.getCols();
+                            String screen = ps.copyString(0, 0, r - 1, c - 1);
+                            String upper = screen.toUpperCase();
+
+                            if (screen.equals(prevScreen) || screen.trim().isEmpty()) {
+                                break;
+                            }
+                            prevScreen = screen;
+                            sbAll.append(screen).append("\n");
+
+                            if (upper.contains("***")) {
+                                ps.SendKeys("[enter]");
+                                try { Thread.sleep(100); } catch (InterruptedException ignored) {}
+                                if (session.getOIA() != null) {
+                                    session.getOIA().waitForInput(2000);
+                                }
+                            } else if (upper.contains("NONVSAM") || upper.contains("CLUSTER") || upper.contains("GDG")
+                                    || upper.contains("ALIAS") || upper.contains("IDCAMS") || screen.contains(" --- ")) {
+                                ps.SendKeys("[enter]");
+                                try { Thread.sleep(100); } catch (InterruptedException ignored) {}
+                                if (session.getOIA() != null) {
+                                    session.getOIA().waitForInput(1000);
+                                }
+
+                                int r2 = ps.getRows();
+                                int c2 = ps.getCols();
+                                String s2 = ps.copyString(0, 0, r2 - 1, c2 - 1);
+                                if (s2.toUpperCase().contains("***")) {
+                                    prevScreen = s2;
+                                    sbAll.append(s2).append("\n");
+                                    ps.SendKeys("[enter]");
+                                    try { Thread.sleep(100); } catch (InterruptedException ignored) {}
+                                    if (session.getOIA() != null) {
+                                        session.getOIA().waitForInput(2000);
+                                    }
+                                    continue;
+                                } else {
+                                    if (!s2.equals(screen) && !s2.trim().isEmpty()) {
+                                        sbAll.append(s2).append("\n");
+                                    }
+                                    break;
+                                }
+                            } else {
+                                break;
+                            }
+                        }
+
+                        // Terminal clean-up
+                        if (isIspf) {
+                            ps.SendKeys("[enter]");
+                            try { Thread.sleep(150); } catch (InterruptedException ignored) {}
+                            if (session.getOIA() != null) {
+                                session.getOIA().waitForInput(1500);
+                            }
+
+                            int r = ps.getRows();
+                            int c = ps.getCols();
+                            String currentScr = ps.copyString(0, 0, r - 1, c - 1);
+                            if (currentScr.toUpperCase().contains("NONVSAM") || currentScr.toUpperCase().contains("IDCAMS")
+                                    || currentScr.contains(" --- ") || (sb != null && !sb.isFormatted())) {
+                                ps.SendKeys("[clear]");
+                                if (session.getOIA() != null) {
+                                    session.getOIA().waitForInput(2000);
+                                }
+                            }
+                        } else {
+                            ps.SendKeys("[clear]");
+                            if (session.getOIA() != null) {
+                                try { Thread.sleep(100); } catch (InterruptedException ignored) {}
+                                session.getOIA().waitForInput(2000);
+                            }
+                        }
+                    }
+
+                    dataToParse = sbAll.toString();
+                } catch (Exception ignored) {
+                    // Fall back to hostQuery
+                }
+            }
+        }
+
         try {
             if (hostType == VM_CMS) {
                 if (callback != null) callback.setStatus(FileTransferHostDirectoryInterface.STATUS_RECEIVING);
-                List<CMSDirectoryEntry> cmsEntries = CMSDirectoryParser.parse(hostQuery);
+                List<CMSDirectoryEntry> cmsEntries = CMSDirectoryParser.parse(dataToParse);
                 for (CMSDirectoryEntry entry : cmsEntries) {
                     String hName = entry.getFilename() + " " + entry.getFiletype();
                     String lName = entry.getFilename() + "." + entry.getFiletype();
@@ -622,7 +872,7 @@ public class Xfer3270 implements FileTransferInterface {
                 }
             } else {
                 if (callback != null) callback.setStatus(FileTransferHostDirectoryInterface.STATUS_RECEIVING);
-                List<TSODirectoryEntry> tsoEntries = TSODirectoryParser.parse(hostQuery);
+                List<TSODirectoryEntry> tsoEntries = TSODirectoryParser.parse(dataToParse);
                 for (TSODirectoryEntry entry : tsoEntries) {
                     String name = entry.getName();
                     if (hostFiles != null) hostFiles.addElement(name);

lib3270j/src/test/java/haus/nightmare/lib3270j/datastream/DBCSDataStreamFullTest.java

@@ -0,0 +1,204 @@
+package haus.nightmare.lib3270j.datastream;
+
+import org.junit.jupiter.api.Test;
+import haus.nightmare.lib3270j.TerminalModel;
+import haus.nightmare.lib3270j.charset.EbcdicTranslator;
+import haus.nightmare.lib3270j.ecl.ECLConstants;
+import haus.nightmare.lib3270j.ecl.ECLField;
+import haus.nightmare.lib3270j.ecl.ECLFieldList;
+import haus.nightmare.lib3270j.ecl.ECLPS;
+import haus.nightmare.lib3270j.screen.ScreenBuffer;
+import haus.nightmare.lib3270j.screen.ExtendedAttribute;
+import static org.junit.jupiter.api.Assertions.*;
+import static haus.nightmare.lib3270j.protocol.DS3270Constants.*;
+
+public class DBCSDataStreamFullTest {
+
+    @Test
+    public void testDBCSDataStreamShiftOutShiftIn() {
+        EbcdicTranslator translator = new EbcdicTranslator("930");
+        ScreenBuffer screen = new ScreenBuffer(TerminalModel.IBM_3279_4, translator);
+        DataStreamProcessor processor = new DataStreamProcessor(screen, translator);
+
+        // Data stream:
+        // EW, WCC, SBA (0, 0), SO (0x0E), 0x40 0x40 (\u3000 ideographic space), SI (0x0F)
+        byte[] stream = new byte[] {
+            (byte) CMD_EW,
+            (byte) 0xC3,
+            (byte) ORDER_SBA,
+            (byte) 0x40, (byte) 0x40,
+            (byte) 0x0E,              // Shift-Out
+            (byte) 0x40, (byte) 0x40, // DBCS ideographic space
+            (byte) 0x0F               // Shift-In
+        };
+
+        processor.processRecord(stream, 0, stream.length, true);
+
+        ExtendedAttribute cell0 = screen.getCell(0);
+        assertEquals(ExtendedAttribute.DB_SO, cell0.db, "Cell 0 must be DB_SO");
+
+        ExtendedAttribute cell1 = screen.getCell(1);
+        assertEquals(ExtendedAttribute.DB_LEFT, cell1.db, "Cell 1 must be DB_LEFT");
+        assertEquals('\u3000', cell1.ucs4, "Cell 1 ucs4 must be \\u3000");
+
+        ExtendedAttribute cell2 = screen.getCell(2);
+        assertEquals(ExtendedAttribute.DB_RIGHT, cell2.db, "Cell 2 must be DB_RIGHT");
+        assertEquals('\u3000', cell2.ucs4, "Cell 2 ucs4 must be \\u3000");
+
+        ExtendedAttribute cell3 = screen.getCell(3);
+        assertEquals(ExtendedAttribute.DB_SI, cell3.db, "Cell 3 must be DB_SI");
+    }
+
+    @Test
+    public void testDBCSRepeatToAddressOrder() {
+        EbcdicTranslator translator = new EbcdicTranslator("930");
+        ScreenBuffer screen = new ScreenBuffer(TerminalModel.IBM_3279_4, translator);
+        DataStreamProcessor processor = new DataStreamProcessor(screen, translator);
+
+        // In DBCS mode (after SO), ORDER_RA consumes 2 data bytes and fills pairs
+        byte[] stream = new byte[] {
+            (byte) CMD_EW,
+            (byte) 0xC3,
+            (byte) ORDER_SBA,
+            (byte) 0x40, (byte) 0x40,
+            (byte) 0x0E,              // SO at 0
+            (byte) ORDER_RA,
+            (byte) 0x40, (byte) 0x4B, // RA up to address 11 (covers cells 1..10)
+            (byte) 0x40, (byte) 0x40, // 2-byte repeat char (\u3000)
+            (byte) 0x0F               // SI at 11
+        };
+
+        processor.processRecord(stream, 0, stream.length, true);
+
+        assertEquals(ExtendedAttribute.DB_SO, screen.getCell(0).db);
+        for (int i = 1; i < 11; i += 2) {
+            assertEquals(ExtendedAttribute.DB_LEFT, screen.getCell(i).db, "Cell " + i + " must be DB_LEFT");
+            assertEquals('\u3000', screen.getCell(i).ucs4);
+            assertEquals(ExtendedAttribute.DB_RIGHT, screen.getCell(i + 1).db, "Cell " + (i + 1) + " must be DB_RIGHT");
+            assertEquals('\u3000', screen.getCell(i + 1).ucs4);
+        }
+        assertEquals(ExtendedAttribute.DB_SI, screen.getCell(11).db);
+    }
+
+    @Test
+    public void testECLPlanesDBCSAndOutlining() {
+        EbcdicTranslator translator = new EbcdicTranslator("930");
+        ScreenBuffer screen = new ScreenBuffer(TerminalModel.IBM_3279_4, translator);
+        DataStreamProcessor processor = new DataStreamProcessor(screen, translator);
+
+        byte[] stream = new byte[] {
+            (byte) CMD_EW,
+            (byte) 0xC3,
+            (byte) ORDER_SBA,
+            (byte) 0x40, (byte) 0x40,
+            (byte) 0x0E,              // SO at 0
+            (byte) 0x40, (byte) 0x40, // DBCS at 1, 2
+            (byte) 0x0F               // SI at 3
+        };
+        processor.processRecord(stream, 0, stream.length, true);
+
+        // Add outlining to cell 1
+        screen.getCell(1).ol = (byte) (ExtendedAttribute.OL_BOX);
+
+        ECLPS eclPS = new ECLPS(screen, null, translator);
+
+        char[] dbcsPlane = new char[4];
+        int count = eclPS.getPlane(ECLConstants.DBCS_PLANE, dbcsPlane, 0, 4);
+        assertEquals(4, count);
+        assertEquals(0x20, dbcsPlane[0], "SO must be 0x20 in DBCS plane");
+        assertEquals(0xC0, dbcsPlane[1], "DB_LEFT must be 0xC0 (DB_DBHIGH)");
+        assertEquals(0x80, dbcsPlane[2], "DB_RIGHT must be 0x80 (DB_DBCS)");
+        assertEquals(0x10, dbcsPlane[3], "SI must be 0x10 in DBCS plane");
+
+        char[] gridPlane = new char[4];
+        eclPS.getPlane(ECLConstants.GRID_PLANE, gridPlane, 0, 4);
+        assertEquals((char) (ExtendedAttribute.OL_BOX & 0xFF), gridPlane[1]);
+
+        // Helper methods
+        assertTrue(eclPS.IsSOChar(0));
+        assertFalse(eclPS.IsDBCSChar(0));
+
+        assertTrue(eclPS.IsDBCSChar(1));
+        assertTrue(eclPS.IsDBCS1stChar(1));
+        assertFalse(eclPS.IsDBCS2ndChar(1));
+
+        assertTrue(eclPS.IsDBCSChar(2));
+        assertFalse(eclPS.IsDBCS1stChar(2));
+        assertTrue(eclPS.IsDBCS2ndChar(2));
+
+        assertTrue(eclPS.IsSIChar(3));
+        assertFalse(eclPS.IsDBCSChar(3));
+    }
+
+    @Test
+    public void testECLFieldDBCSMethods() {
+        EbcdicTranslator translator = new EbcdicTranslator("930");
+        ScreenBuffer screen = new ScreenBuffer(TerminalModel.IBM_3279_4, translator);
+        DataStreamProcessor processor = new DataStreamProcessor(screen, translator);
+
+        // Field with SO + DBCS + SI
+        byte[] stream = new byte[] {
+            (byte) CMD_EW,
+            (byte) 0xC3,
+            (byte) ORDER_SBA,
+            (byte) 0x40, (byte) 0x40,
+            (byte) ORDER_SF,
+            (byte) FA_PRINTABLE,      // Field at 0
+            (byte) 0x0E,              // SO at 1
+            (byte) 0x40, (byte) 0x40, // DBCS at 2, 3
+            (byte) 0x0F               // SI at 4
+        };
+        processor.processRecord(stream, 0, stream.length, true);
+
+        ECLPS eclPS = new ECLPS(screen, null, translator);
+        ECLFieldList fieldList = new ECLFieldList(eclPS);
+        fieldList.Refresh();
+        assertEquals(1, fieldList.size());
+
+        ECLField field = fieldList.getField(0);
+        assertTrue(field.isDBCS(), "Field should report isDBCS = true");
+        assertTrue(field.isDBCSOnly(), "Field should report isDBCSOnly = true");
+    }
+
+    @Test
+    public void testQueryReplyBuilderDBCSCharsets() {
+        EbcdicTranslator translator = new EbcdicTranslator("930");
+        ScreenBuffer screen = new ScreenBuffer(TerminalModel.IBM_3279_4, translator);
+        QueryReplyBuilder builder = new QueryReplyBuilder(screen);
+
+        byte[] charsets = builder.buildCharsets();
+        assertNotNull(charsets);
+        assertEquals(42, charsets.length, "DBCS Character Sets QR payload must be 42 bytes (matching HoD xxxqrcs)");
+
+        assertEquals((byte) 0x8E, charsets[0], "Flags 1 must be 0x8E");
+        assertEquals((byte) 0x00, charsets[1], "Flags 2 must be 0x00");
+        assertEquals(12, charsets[2], "SDW must be 12");
+        assertEquals(24, charsets[3], "SDH must be 24");
+        assertEquals(0x0B, charsets[8], "Descriptor length DL must be 11 (0x0B)");
+
+        // Descriptor 2 (DBCS): offset 9 + 11 = 20
+        assertEquals(0x01, charsets[20], "Set ID must be 1");
+        assertEquals((byte) 0x80, charsets[22], "Local ID must be 0x80 (DBCS)");
+        assertEquals(24, charsets[23], "DBCS cell width must be double (24)");
+        assertEquals(24, charsets[24], "DBCS cell height must be 24");
+        assertEquals(0x41, charsets[25], "Section start must be 0x41");
+        assertEquals(0x7F, charsets[26], "Section end for 930 must be 0x7F");
+
+        // DB CGCSGID = 370 (0x0172), DB CPGID = 300 (0x012C)
+        int cgcsgid = ((charsets[27] & 0xFF) << 8) | (charsets[28] & 0xFF);
+        int cpgid = ((charsets[29] & 0xFF) << 8) | (charsets[30] & 0xFF);
+        assertEquals(370, cgcsgid);
+        assertEquals(300, cpgid);
+
+        // Summary Query Reply contains Outlining (0x8C) and DBCS Asia (0x91)
+        byte[] summary = builder.buildSummary();
+        boolean hasOutlining = false;
+        boolean hasDbcsAsia = false;
+        for (byte b : summary) {
+            if ((b & 0xFF) == QR_OUTLINING) hasOutlining = true;
+            if ((b & 0xFF) == QR_DBCS_ASIA) hasDbcsAsia = true;
+        }
+        assertTrue(hasOutlining, "Summary must include QR_OUTLINING");
+        assertTrue(hasDbcsAsia, "Summary must include QR_DBCS_ASIA");
+    }
+}

lib3270j/src/test/java/haus/nightmare/lib3270j/datastream/DataStreamProcessorTest.java

@@ -271,4 +271,156 @@ public class DataStreamProcessorTest {
         assertEquals('8', screen.getCell(12).ucs4);
         assertEquals('9', screen.getCell(13).ucs4);
     }
+
+    @Test
+    public void testReadPartitionReadModifiedReturnsAidQreply() {
+        java.io.ByteArrayOutputStream out = new java.io.ByteArrayOutputStream();
+        processor.setOutputSender(out::writeBytes);
+
+        // Send WSF Read Partition with SNA_CMD_RM (0xF6)
+        byte[] sfRm = new byte[] {
+            (byte) CMD_WSF, 0x00, 0x05, (byte) SF_READ_PART, 0x00, (byte) SNA_CMD_RM
+        };
+        out.reset();
+        processor.processRecord(sfRm, 0, sfRm.length, true);
+
+        byte[] sent = out.toByteArray();
+        assertTrue(sent.length >= 3, "Inbound data stream must contain at least AID and cursor address");
+        assertEquals((byte) AID_QREPLY, sent[0], "Read Partition Read Modified AID must be AID_QREPLY (0x61)");
+
+        // Send WSF Read Partition with CMD_RM (0x06)
+        byte[] sfRmNonSna = new byte[] {
+            (byte) CMD_WSF, 0x00, 0x05, (byte) SF_READ_PART, 0x00, (byte) CMD_RM
+        };
+        out.reset();
+        processor.processRecord(sfRmNonSna, 0, sfRmNonSna.length, true);
+
+        sent = out.toByteArray();
+        assertTrue(sent.length >= 3);
+        assertEquals((byte) AID_QREPLY, sent[0], "Read Partition Read Modified (non-SNA) AID must be AID_QREPLY (0x61)");
     }
+
+    @Test
+    public void testReadPartitionReadModifiedAllReturnsAidQreply() {
+        java.io.ByteArrayOutputStream out = new java.io.ByteArrayOutputStream();
+        processor.setOutputSender(out::writeBytes);
+
+        // Send WSF Read Partition with SNA_CMD_RMA (0x6E)
+        byte[] sfRma = new byte[] {
+            (byte) CMD_WSF, 0x00, 0x05, (byte) SF_READ_PART, 0x00, (byte) SNA_CMD_RMA
+        };
+        out.reset();
+        processor.processRecord(sfRma, 0, sfRma.length, true);
+
+        byte[] sent = out.toByteArray();
+        assertTrue(sent.length >= 3);
+        assertEquals((byte) AID_QREPLY, sent[0], "Read Partition Read Modified All AID must be AID_QREPLY (0x61)");
+    }
+
+    @Test
+    public void testReadPartitionReadBufferReturnsAidQreply() {
+        java.io.ByteArrayOutputStream out = new java.io.ByteArrayOutputStream();
+        processor.setOutputSender(out::writeBytes);
+
+        // Send WSF Read Partition with SNA_CMD_RB (0xF2)
+        byte[] sfRb = new byte[] {
+            (byte) CMD_WSF, 0x00, 0x05, (byte) SF_READ_PART, 0x00, (byte) SNA_CMD_RB
+        };
+        out.reset();
+        processor.processRecord(sfRb, 0, sfRb.length, true);
+
+        byte[] sent = out.toByteArray();
+        assertTrue(sent.length >= 3);
+        assertEquals((byte) AID_QREPLY, sent[0], "Read Partition Read Buffer AID must be AID_QREPLY (0x61)");
+    }
+
+    @Test
+    public void testReadModifiedAfterQueryRespondsWithQueryReply() {
+        java.io.ByteArrayOutputStream out = new java.io.ByteArrayOutputStream();
+        processor.setOutputSender(out::writeBytes);
+
+        // 1. Send WSF Read Partition Query
+        byte[] sfQuery = new byte[] {
+            (byte) CMD_WSF, 0x00, 0x05, (byte) SF_READ_PART, (byte) 0xFF, (byte) SF_RP_QUERY
+        };
+        out.reset();
+        processor.processRecord(sfQuery, 0, sfQuery.length, true);
+
+        assertTrue(processor.isQreplyPending(), "qreplyPending should be true after query");
+
+        // 2. Mainframe issues channel Read Modified command (0x06) to poll the query reply
+        byte[] rmCmd = new byte[] { (byte) CMD_RM };
+        out.reset();
+        processor.processRecord(rmCmd, 0, rmCmd.length, true);
+
+        byte[] sent = out.toByteArray();
+        assertTrue(sent.length > 0, "Should have received query reply data");
+        assertEquals((byte) AID_SF, sent[0], "Query reply header AID must be AID_SF (0x88)");
+        assertFalse(processor.isQreplyPending(), "qreplyPending should be cleared after reply is sent");
+    }
+
+    @Test
+    public void testStandaloneReadModifiedReturnsAidNo() {
+        haus.nightmare.lib3270j.input.InputProcessor input = new haus.nightmare.lib3270j.input.InputProcessor(screen, translator, null);
+        processor.setInputProcessor(input);
+
+        // Simulate operator previously pressing Enter
+        input.setLastAid(AID_ENTER);
+        input.setKeyboardLocked(true);
+
+        java.io.ByteArrayOutputStream out = new java.io.ByteArrayOutputStream();
+        processor.setOutputSender(out::writeBytes);
+
+        // Host responds with Erase/Write Alternate (0x7E) with WCC 0xC3 (kbdRestore=true)
+        byte[] ewa = new byte[] { (byte) SNA_CMD_EWA, (byte) 0xC3 };
+        processor.processRecord(ewa, 0, ewa.length, true);
+
+        assertFalse(input.isKeyboardLocked(), "Keyboard should be restored by WCC");
+        assertEquals(AID_NO, input.getLastAid(), "lastAid should be reset to AID_NO on keyboard restore");
+
+        // Host subsequently polls terminal with standalone Read Modified (0xF6)
+        byte[] rm = new byte[] { (byte) SNA_CMD_RM };
+        out.reset();
+        processor.processRecord(rm, 0, rm.length, true);
+
+        byte[] sent = out.toByteArray();
+        assertTrue(sent.length >= 3, "Read Modified response must contain at least AID and 2-byte cursor address");
+        assertEquals((byte) AID_NO, sent[0], "Standalone Read Modified from host must respond with AID_NO (0x60)");
+        assertFalse(input.isKeyboardLocked(), "Keyboard must remain unlocked after host Read Modified poll");
+    }
+
+    @Test
+    public void testStandaloneReadModifiedWithModifiedFieldSendsDataAndAidNo() {
+        haus.nightmare.lib3270j.input.InputProcessor input = new haus.nightmare.lib3270j.input.InputProcessor(screen, translator, null);
+        processor.setInputProcessor(input);
+
+        java.io.ByteArrayOutputStream out = new java.io.ByteArrayOutputStream();
+        processor.setOutputSender(out::writeBytes);
+
+        // Write a screen with an unprotected field at pos 10, WCC kbdRestore
+        byte[] initStream = new byte[] {
+            (byte) CMD_EW, (byte) 0xC3,
+            (byte) ORDER_SBA, 0x00, 0x0A, // SBA 10
+            (byte) ORDER_SF, (byte) FA_PRINTABLE, // unprotected
+            (byte) 0xC1, (byte) 0xC2 // EBCDIC 'A', 'B'
+        };
+        processor.processRecord(initStream, 0, initStream.length, true);
+
+        // Modify the field by setting MDT (e.g. user typed into it)
+        screen.getCell(10).fa = (byte) (screen.getCell(10).fa | FA_MODIFY);
+
+        // Host polls with 0xF6 (SNA_CMD_RM)
+        out.reset();
+        byte[] rm = new byte[] { (byte) SNA_CMD_RM };
+        processor.processRecord(rm, 0, rm.length, true);
+
+        byte[] sent = out.toByteArray();
+        assertTrue(sent.length > 3, "Should include SBA and field contents for modified field");
+        assertEquals((byte) AID_NO, sent[0], "AID must be AID_NO (0x60)");
+        assertEquals((byte) ORDER_SBA, sent[3], "Order must be SBA");
+        assertEquals((byte) 0xC1, sent[6], "First char should be 'A'");
+        assertEquals((byte) 0xC2, sent[7], "Second char should be 'B'");
+        assertTrue((screen.getCell(10).fa & FA_MODIFY) != 0, "MDT must not be cleared by Read Modified command");
+    }
+}
+

lib3270j/src/test/java/haus/nightmare/lib3270j/datastream/QueryReplyBuilderTest.java

@@ -49,9 +49,24 @@ public class QueryReplyBuilderTest {
 
         // In GraphicsMode.NONE, Vector Graphics QR 0xB0 must NOT be advertised in Summary
         int sumLen = ((replies[1] & 0xFF) << 8) | (replies[2] & 0xFF);
+        boolean hasB0 = false;
+        boolean hasA8 = false;
         for (int i = 5; i < 1 + sumLen; i++) {
-            assertNotEquals(QR_SEGMENT, replies[i] & 0xFF);
+            if ((replies[i] & 0xFF) == QR_SEGMENT) hasB0 = true;
+            if ((replies[i] & 0xFF) == QR_TRANSPARENCY) hasA8 = true;
         }
+        assertFalse(hasB0);
+        assertTrue(hasA8, "QR_TRANSPARENCY (0xA8) should be advertised even in GraphicsMode.NONE");
+
+        // And QR_TRANSPARENCY structured field payload must be present in replies
+        boolean hasA8Payload = false;
+        for (int i = 0; i < replies.length - 3; i++) {
+            if ((replies[i] & 0xFF) == 0x81 && (replies[i + 1] & 0xFF) == QR_TRANSPARENCY) {
+                hasA8Payload = true;
+                break;
+            }
+        }
+        assertTrue(hasA8Payload, "QR_TRANSPARENCY structured field should be included in buildAllQueryReplies");
     }
 
     @Test

lib3270j/src/test/java/haus/nightmare/lib3270j/datastream/QueryReplyPhase2Test.java

@@ -87,10 +87,10 @@ public class QueryReplyPhase2Test {
         assertNotNull(reply);
 
         List<ParsedSF> sfs = parseQueryReplies(reply);
-        // Base query reply must contain exactly 10 structured fields for SBCS:
+        // Base query reply must contain exactly 11 structured fields for SBCS:
         // 0x80 (Summary), 0x81 (Usable Area), 0x84 (Alpha Partitions), 0x85 (Character Sets),
-        // 0x86 (Color), 0x87 (Highlighting), 0x88 (Reply Modes), 0x95 (DDM), 0x99 (AuxDA), 0xA6 (Implicit Part)
-        assertEquals(10, sfs.size());
+        // 0x86 (Color), 0x87 (Highlighting), 0x88 (Reply Modes), 0x95 (DDM), 0x99 (AuxDA), 0xA6 (Implicit Part), 0xA8 (Transparency)
+        assertEquals(11, sfs.size());
 
         assertEquals(QR_SUMMARY, sfs.get(0).qcode);
         assertEquals(QR_USABLE_AREA, sfs.get(1).qcode);
@@ -102,10 +102,10 @@ public class QueryReplyPhase2Test {
         assertEquals(QR_DDM, sfs.get(7).qcode);
         assertEquals(QR_AUXDA, sfs.get(8).qcode);
         assertEquals(QR_IMP_PART, sfs.get(9).qcode);
+        assertEquals(QR_TRANSPARENCY, sfs.get(10).qcode);
 
-        // Verify that Vector Graphics SF payloads (0xA8, 0xB0..0xB6) are NOT sent in base reply
+        // Verify that Vector Graphics SF payloads (0xB0..0xB6) are NOT sent in base reply
         for (ParsedSF sf : sfs) {
-            assertNotEquals(QR_TRANSPARENCY, sf.qcode);
             assertNotEquals(QR_SEGMENT, sf.qcode);
             assertNotEquals(QR_PROCEDURE, sf.qcode);
             assertNotEquals(QR_LINETYPE, sf.qcode);
@@ -246,7 +246,7 @@ public class QueryReplyPhase2Test {
         assertTrue(sent.length > 0);
         assertEquals((byte) AID_SF, sent[0]);
         List<ParsedSF> sfs = parseQueryReplies(sent);
-        assertEquals(10, sfs.size());
+        assertEquals(11, sfs.size());
 
         // Test SF_RP_QLIST (0x03) with SF_RPQ_LIST (0x00) and codes 0xB0, 0xB4
         byte[] queryList = new byte[] {

lib3270j/src/test/java/haus/nightmare/lib3270j/datastream/TransparencyDataStreamTest.java

@@ -0,0 +1,143 @@
+package haus.nightmare.lib3270j.datastream;
+
+import haus.nightmare.lib3270j.TerminalModel;
+import haus.nightmare.lib3270j.charset.EbcdicTranslator;
+import haus.nightmare.lib3270j.screen.ExtendedAttribute;
+import haus.nightmare.lib3270j.screen.ScreenBuffer;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import java.io.ByteArrayOutputStream;
+
+import static haus.nightmare.lib3270j.protocol.DS3270Constants.*;
+import static org.junit.jupiter.api.Assertions.*;
+
+public class TransparencyDataStreamTest {
+
+    private ScreenBuffer screen;
+    private DataStreamProcessor processor;
+    private ByteArrayOutputStream output;
+
+    @BeforeEach
+    public void setUp() {
+        EbcdicTranslator translator = new EbcdicTranslator();
+        screen = new ScreenBuffer(TerminalModel.IBM_3279_2, translator);
+        processor = new DataStreamProcessor(screen, translator);
+        output = new ByteArrayOutputStream();
+        processor.setOutputSender(bytes -> output.write(bytes, 0, bytes.length));
+    }
+
+    @Test
+    public void testSetAttributeTransparency() {
+        // Send SFE with XA_TRANSPARENCY = XAT_OPAQUE (0xFF)
+        byte[] sfeRecord = new byte[] {
+            (byte) CMD_EW, 0x00,
+            (byte) ORDER_SFE, 0x02,
+            (byte) XA_3270, (byte) FA_PRINTABLE,
+            (byte) XA_TRANSPARENCY, (byte) ExtendedAttribute.TR_OPAQUE
+        };
+        processor.processRecord(sfeRecord, 0, sfeRecord.length, true);
+
+        ExtendedAttribute cell0 = screen.getCell(0);
+        assertTrue(cell0.isFieldAttribute());
+        assertEquals(ExtendedAttribute.TR_OPAQUE, cell0.tr);
+
+        // Send SA with XA_TRANSPARENCY = XAT_OPAQUE followed by character 'A' (0xC1)
+        byte[] saRecord = new byte[] {
+            (byte) CMD_W, 0x00,
+            (byte) ORDER_SBA, 0x00, 0x01,
+            (byte) ORDER_SA, (byte) XA_TRANSPARENCY, (byte) ExtendedAttribute.TR_OPAQUE,
+            (byte) 0xC1 // 'A'
+        };
+        processor.processRecord(saRecord, 0, saRecord.length, true);
+
+        ExtendedAttribute charCell1 = screen.getCell(1);
+        assertFalse(charCell1.isFieldAttribute());
+        assertEquals((byte) 0xC1, charCell1.ec);
+        assertEquals(ExtendedAttribute.TR_OPAQUE, charCell1.tr);
+
+        // Send SA with XA_ALL (0x00) followed by character 'B' (0xC2) -> should reset tr to 0
+        byte[] resetRecord = new byte[] {
+            (byte) CMD_W, 0x00,
+            (byte) ORDER_SBA, 0x00, 0x02,
+            (byte) ORDER_SA, (byte) XA_ALL, 0x00,
+            (byte) 0xC2 // 'B'
+        };
+        processor.processRecord(resetRecord, 0, resetRecord.length, true);
+
+        ExtendedAttribute charCell2 = screen.getCell(2);
+        assertFalse(charCell2.isFieldAttribute());
+        assertEquals((byte) 0xC2, charCell2.ec);
+        assertEquals(ExtendedAttribute.TR_DEFAULT, charCell2.tr);
+    }
+
+    @Test
+    public void testRepeatToAddressWithTransparency() {
+        // Set SA Transparency = Opaque, then RA to address 5 with char 'C' (0xC3)
+        byte[] raRecord = new byte[] {
+            (byte) CMD_EW, 0x00,
+            (byte) ORDER_SBA, 0x00, 0x00,
+            (byte) ORDER_SA, (byte) XA_TRANSPARENCY, (byte) ExtendedAttribute.TR_OPAQUE,
+            (byte) ORDER_RA, 0x00, 0x05, (byte) 0xC3
+        };
+        processor.processRecord(raRecord, 0, raRecord.length, true);
+
+        for (int i = 0; i < 5; i++) {
+            ExtendedAttribute cell = screen.getCell(i);
+            assertEquals((byte) 0xC3, cell.ec);
+            assertEquals(ExtendedAttribute.TR_OPAQUE, cell.tr, "Cell at " + i + " should have TR_OPAQUE");
+        }
+    }
+
+    @Test
+    public void testReadBufferExtendedFieldIncludesTransparency() {
+        screen.setReplyMode((byte) SF_SRM_XFIELD);
+        screen.setFieldAttribute(0, (byte) FA_PRINTABLE);
+        screen.getCell(0).tr = ExtendedAttribute.TR_OPAQUE;
+
+        processor.processReadBuffer();
+
+        byte[] result = output.toByteArray();
+        assertTrue(result.length > 3);
+        assertEquals((byte) AID_NO, result[0]);
+
+        // Find ORDER_SFE
+        boolean foundTr = false;
+        for (int i = 3; i < result.length - 2; i++) {
+            if ((result[i] & 0xFF) == ORDER_SFE) {
+                int pairCount = result[i + 1] & 0xFF;
+                int pos = i + 2;
+                for (int p = 0; p < pairCount; p++) {
+                    int attrType = result[pos] & 0xFF;
+                    int attrVal = result[pos + 1] & 0xFF;
+                    if (attrType == XA_TRANSPARENCY && attrVal == (ExtendedAttribute.TR_OPAQUE & 0xFF)) {
+                        foundTr = true;
+                    }
+                    pos += 2;
+                }
+            }
+        }
+        assertTrue(foundTr, "Read Buffer in SF_SRM_XFIELD mode should report XA_TRANSPARENCY");
+    }
+
+    @Test
+    public void testReadBufferCharacterModeIncludesTransparency() {
+        screen.setReplyMode((byte) SF_SRM_CHAR);
+        screen.getCell(0).ec = (byte) 0xC1;
+        screen.getCell(0).tr = ExtendedAttribute.TR_OPAQUE;
+
+        processor.processReadBuffer();
+
+        byte[] result = output.toByteArray();
+        assertTrue(result.length > 3);
+
+        boolean foundSaTr = false;
+        for (int i = 3; i < result.length - 2; i++) {
+            if ((result[i] & 0xFF) == ORDER_SA && (result[i + 1] & 0xFF) == XA_TRANSPARENCY && (result[i + 2] & 0xFF) == (ExtendedAttribute.TR_OPAQUE & 0xFF)) {
+                foundSaTr = true;
+                break;
+            }
+        }
+        assertTrue(foundSaTr, "Read Buffer in SF_SRM_CHAR mode should output ORDER_SA for XA_TRANSPARENCY");
+    }
+}

lib3270j/src/test/java/haus/nightmare/lib3270j/ft/FTConfigTest.java

@@ -14,7 +14,7 @@ public class FTConfigTest {
         config.setTransferMode(FTConfig.TransferMode.ASCII);
         config.setCrAction(FTConfig.CrAction.REMOVE);
 
-        assertEquals("IND$FILE GET MY.DATASET ASCII CRLF", config.buildCommand());
+        assertEquals("TSO IND$FILE GET MY.DATASET ASCII CRLF", config.buildCommand());
     }
 
     @Test
@@ -25,7 +25,7 @@ public class FTConfigTest {
         config.setHostFilename("'USER.BIN.DATA'");
         config.setTransferMode(FTConfig.TransferMode.BINARY);
 
-        assertEquals("IND$FILE GET 'USER.BIN.DATA'", config.buildCommand());
+        assertEquals("TSO IND$FILE GET 'USER.BIN.DATA'", config.buildCommand());
     }
 
     @Test
@@ -40,7 +40,7 @@ public class FTConfigTest {
         config.setLrecl("80");
         config.setBlksize("3120");
 
-        assertEquals("IND$FILE PUT MY.DATASET ASCII CRLF RECFM(F) LRECL(80) BLKSIZE(3120)", config.buildCommand());
+        assertEquals("TSO IND$FILE PUT MY.DATASET ASCII CRLF RECFM(F) LRECL(80) BLKSIZE(3120)", config.buildCommand());
     }
 
     @Test
@@ -125,4 +125,66 @@ public class FTConfigTest {
         String cmd = config.buildCommand();
         assertEquals("IND$FILE PUT FILE01 (BINARY NOCRLF REPLACE", cmd);
     }
+
+    @Test
+    public void testPdsAllocationCommand() {
+        FTConfig config = new FTConfig();
+        config.setHostType(FTConfig.HostType.TSO);
+        config.setDirection(FTConfig.Direction.SEND);
+        config.setHostFilename("'USER.PDS.DATA'");
+        config.setTransferMode(FTConfig.TransferMode.ASCII);
+        config.setCrAction(FTConfig.CrAction.REMOVE);
+        config.setRecfm("FB");
+        config.setLrecl("80");
+        config.setBlksize("3120");
+        config.setPrimarySpace(15);
+        config.setSecondarySpace(5);
+        config.setDirectoryBlocks(10);
+        config.setUnits(FTConfig.AllocationUnit.TRACKS);
+
+        String cmd = config.buildCommand();
+        assertEquals("TSO IND$FILE PUT 'USER.PDS.DATA' ASCII CRLF RECFM(F) LRECL(80) BLKSIZE(3120) SPACE(15,5,10) TRACKS", cmd);
+    }
+
+    @Test
+    public void testPdsParseOptionsThreeParameters() {
+        FTConfig config = new FTConfig();
+        config.setDirection(FTConfig.Direction.SEND);
+        config.setHostFilename("SYS1.PARMLIB");
+        config.parseOptions("TSO ASCII CRLF SPACE(20,10,15) TRACKS");
+
+        assertEquals(20, config.getPrimarySpace());
+        assertEquals(10, config.getSecondarySpace());
+        assertEquals(15, config.getDirectoryBlocks());
+        assertEquals(FTConfig.AllocationUnit.TRACKS, config.getUnits());
+        assertEquals("TSO IND$FILE PUT SYS1.PARMLIB ASCII CRLF SPACE(20,10,15) TRACKS", config.buildCommand());
+    }
+
+    @Test
+    public void testPdsParseOptionsWithDirToken() {
+        FTConfig config = new FTConfig();
+        config.setDirection(FTConfig.Direction.SEND);
+        config.setHostFilename("SYS1.PROCLIB");
+        config.parseOptions("TSO ASCII CRLF SPACE(10,5) DIR(20) CYLINDERS");
+
+        assertEquals(10, config.getPrimarySpace());
+        assertEquals(5, config.getSecondarySpace());
+        assertEquals(20, config.getDirectoryBlocks());
+        assertEquals(FTConfig.AllocationUnit.CYLINDERS, config.getUnits());
+        assertEquals("TSO IND$FILE PUT SYS1.PROCLIB ASCII CRLF SPACE(10,5,20) CYLINDERS", config.buildCommand());
+    }
+
+    @Test
+    public void testPdsSetSpaceWithThreeArguments() {
+        FTConfig config = new FTConfig();
+        config.setDirection(FTConfig.Direction.SEND);
+        config.setHostFilename("MY.PDS");
+        config.setSpace("12,4,8");
+
+        assertEquals(12, config.getPrimarySpace());
+        assertEquals(4, config.getSecondarySpace());
+        assertEquals(8, config.getDirectoryBlocks());
+        assertEquals(FTConfig.AllocationUnit.TRACKS, config.getUnits());
+        assertTrue(config.buildCommand().contains("SPACE(12,4,8) TRACKS"));
+    }
 }

lib3270j/src/test/java/haus/nightmare/lib3270j/ft/FTProtocolHardeningPhase16Test.java

@@ -443,7 +443,7 @@ public class FTProtocolHardeningPhase16Test {
         assertEquals("APVUFILE", optionsCfg.getProgramName());
 
         String cmd = optionsCfg.buildCommand();
-        assertTrue(cmd.startsWith("APVUFILE PUT 'TEST.FILE'"));
+        assertTrue(cmd.startsWith("TSO APVUFILE PUT 'TEST.FILE'"));
         assertTrue(cmd.contains("NEW"));
         assertTrue(cmd.contains("NOSO"));
     }

lib3270j/src/test/java/haus/nightmare/lib3270j/ft/dir/DirectoryParserTest.java

@@ -68,6 +68,8 @@ public class DirectoryParserTest {
         assertEquals(80, e0.getLrecl());
         assertEquals(3120, e0.getBlksize());
         assertEquals("PS", e0.getDsorg());
+        assertEquals(15, e0.getTracksAllocated());
+        assertEquals(1, e0.getExtents());
 
         TSODirectoryEntry e1 = entries.get(1);
         assertEquals("TSOUSER.OTHER.DATA", e1.getName());
@@ -121,4 +123,213 @@ public class DirectoryParserTest {
         assertEquals("GENPASS", entries.get(1).getFilename());
         assertEquals("REXX", entries.get(1).getFiletype());
     }
+
+    @Test
+    public void testContinuousScreenBufferParsingCms() {
+        // Continuous 80-character rows without newlines (as produced by unformatted 3270 presentation space)
+        String row1 = String.format("%-80s", "PROFILE  EXEC     A1 V         80   25      1 2026-05-10 14:22:01");
+        String row2 = String.format("%-80s", "TEST     DATA     A1 F         80  100      2 2026-08-01 09:15:00");
+        String row3 = String.format("%-80s", "Ready; T=0.01/0.01 12:00:00");
+        String continuousScreen = row1 + row2 + row3;
+
+        List<CMSDirectoryEntry> entries = CMSDirectoryParser.parse(continuousScreen);
+        assertEquals(2, entries.size(), "Should parse 2 CMS entries and ignore Ready;");
+        assertEquals("PROFILE", entries.get(0).getFilename());
+        assertEquals("TEST", entries.get(1).getFilename());
+    }
+
+    @Test
+    public void testContinuousScreenBufferParsingTso() {
+        // Continuous 80-character rows without newlines for ISPF DSLIST
+        String row1 = String.format("%-80s", "Dslist - Data Sets Matching USER.*");
+        String row2 = String.format("%-80s", "Command - Enter \"/\" to select action                  Tracks Dsorg Recfm Volume");
+        String row3 = String.format("%-80s", "         USER.TEST.CNTL                                    15 PO    FB    TSO001");
+        String row4 = String.format("%-80s", "         USER.TEST.DATA                                    10 PS    FB    TSO001");
+        String row5 = String.format("%-80s", "***");
+        String continuousScreen = row1 + row2 + row3 + row4 + row5;
+
+        List<TSODirectoryEntry> entries = TSODirectoryParser.parse(continuousScreen);
+        assertEquals(2, entries.size(), "Should parse 2 TSO entries and ignore ***");
+        assertEquals("USER.TEST.CNTL", entries.get(0).getName());
+        assertEquals("USER.TEST.DATA", entries.get(1).getName());
+    }
+
+    @Test
+    public void testCmsMoreRunningAndReadyHandling() {
+        String cmsOutput =
+                "PROFILE  EXEC     A1 V         80   25      1 2026-05-10 14:22:01 MORE...\n" +
+                "MORE...\n" +
+                "RUNNING\n" +
+                "HOLDING\n" +
+                "TEST     DATA     A1 F         80  100      2 2026-08-01 09:15:00\n" +
+                "OTHER    FILE     A1 V         80   50      1 2026-08-02 10:00:00 RUNNING\n" +
+                "Ready(00000); T=0.01/0.01 12:00:00\n";
+
+        List<CMSDirectoryEntry> entries = CMSDirectoryParser.parse(cmsOutput);
+        assertEquals(3, entries.size(), "Should parse 3 CMS entries and strip/ignore MORE..., RUNNING, HOLDING, Ready(00000)");
+        assertEquals("PROFILE", entries.get(0).getFilename());
+        assertEquals("TEST", entries.get(1).getFilename());
+        assertEquals("OTHER", entries.get(2).getFilename());
+    }
+
+    @Test
+    public void testTsoListcatWithClusterAndGdg() {
+        String listcatOutput =
+                "IDCAMS  SYSTEM SERVICES                                           TIME: 12:00:00\n" +
+                "NONVSAM ------- TSOUSER.NORMAL.DATA\n" +
+                "     VOLUMES\n" +
+                "       VOLSER------------TSO001\n" +
+                "CLUSTER ------- TSOUSER.VSAM.KSDS\n" +
+                "     IN-CAT --- CATALOG.USER\n" +
+                "GDG ----------- TSOUSER.GDG.BASE\n" +
+                "ALIAS --------- TSOUSER.MY.ALIAS\n";
+
+        List<TSODirectoryEntry> entries = TSODirectoryParser.parse(listcatOutput);
+        assertEquals(4, entries.size(), "Should parse NONVSAM, CLUSTER, GDG, and ALIAS");
+        assertEquals("TSOUSER.NORMAL.DATA", entries.get(0).getName());
+        assertEquals("TSO001", entries.get(0).getVolume());
+        assertEquals("TSOUSER.VSAM.KSDS", entries.get(1).getName());
+        assertEquals("VSAM", entries.get(1).getDsorg());
+        assertEquals("TSOUSER.GDG.BASE", entries.get(2).getName());
+        assertEquals("TSOUSER.MY.ALIAS", entries.get(3).getName());
+    }
+
+    @Test
+    public void testTsoListcatAllocDetails() {
+        String allocOutput =
+                "IDCAMS  SYSTEM SERVICES                                           TIME: 12:00:00\n" +
+                "NONVSAM ------- TSOUSER.PROJECT.DATA\n" +
+                "     IN-CAT --- CATALOG.USER\n" +
+                "     VOLUMES\n" +
+                "       VOLSER------------TSOP01     DEVTYPE------X'3010200F'\n" +
+                "     ALLOCATION\n" +
+                "       SPACE-TYPE---------TRACK     SPACE-PRI----------------15    SPACE-SEC----------------5\n" +
+                "       EXTENTS-----------------1\n" +
+                "CLUSTER ------- TSOUSER.VSAM.TEST\n" +
+                "     IN-CAT --- CATALOG.USER\n" +
+                "   DATA ------- TSOUSER.VSAM.TEST.DATA\n" +
+                "     VOLUMES\n" +
+                "       VOLSER------------TSOP02\n" +
+                "     ALLOCATION\n" +
+                "       SPACE-TYPE------CYLINDER     SPACE-PRI----------------2\n" +
+                "       EXTENTS-----------------2\n" +
+                "     ATTRIBUTES\n" +
+                "       AVGLRECL--------------80     MAXLRECL----------------80     CISIZE----------------4096\n";
+
+        List<TSODirectoryEntry> entries = TSODirectoryParser.parse(allocOutput);
+        assertEquals(2, entries.size());
+
+        TSODirectoryEntry nonvsam = entries.get(0);
+        assertEquals("TSOUSER.PROJECT.DATA", nonvsam.getName());
+        assertEquals("TSOP01", nonvsam.getVolume());
+        assertEquals(15, nonvsam.getTracksAllocated());
+        assertEquals(1, nonvsam.getExtents());
+
+        TSODirectoryEntry vsam = entries.get(1);
+        assertEquals("TSOUSER.VSAM.TEST", vsam.getName());
+        assertEquals("VSAM", vsam.getDsorg());
+        assertEquals("TSOP02", vsam.getVolume());
+        assertEquals(30, vsam.getTracksAllocated()); // 2 cylinders * 15 tracks
+        assertEquals(2, vsam.getExtents());
+        assertEquals(80, vsam.getLrecl());
+        assertEquals(4096, vsam.getBlksize());
+    }
+
+    @Test
+    public void testTsoListdsParsing() {
+        String listdsOutput =
+                "TSOUSER.MY.SOURCE\n" +
+                "--RECFM-LRECL-BLKSIZE-DSORG\n" +
+                "  FB    80    3120    PO\n" +
+                "--VOLUMES--\n" +
+                "  SRC001\n";
+
+        List<TSODirectoryEntry> entries = TSODirectoryParser.parse(listdsOutput);
+        assertEquals(1, entries.size());
+        TSODirectoryEntry e = entries.get(0);
+        assertEquals("TSOUSER.MY.SOURCE", e.getName());
+        assertEquals("FB", e.getRecfm());
+        assertEquals(80, e.getLrecl());
+        assertEquals(3120, e.getBlksize());
+        assertEquals("PO", e.getDsorg());
+        assertEquals("SRC001", e.getVolume());
+    }
+
+    @Test
+    public void testTsoListdsWithStatusAllocationParsing() {
+        String listdsStatusOutput =
+                "SYS1.ACMDLIB\n" +
+                "--RECFM-LRECL-BLKSIZE-DSORG\n" +
+                "  U     0     32760   PO\n" +
+                "--VOLUMES--\n" +
+                "  TK5DLB\n" +
+                "--ALLOCATION---------------\n" +
+                "  SPACE-TYPE          TRACK\n" +
+                "  SPACE-PRI           30\n" +
+                "  SPACE-SEC           5\n" +
+                "--TRACKS-ALLOCATED-EXTENTS-\n" +
+                "               30        1\n";
+
+        List<TSODirectoryEntry> entries = TSODirectoryParser.parse(listdsStatusOutput);
+        assertEquals(1, entries.size());
+        TSODirectoryEntry e = entries.get(0);
+        assertEquals("SYS1.ACMDLIB", e.getName());
+        assertEquals("U", e.getRecfm());
+        assertEquals(0, e.getLrecl());
+        assertEquals(32760, e.getBlksize());
+        assertEquals("PO", e.getDsorg());
+        assertEquals("TK5DLB", e.getVolume());
+        assertEquals(30, e.getTracksAllocated());
+        assertEquals(1, e.getExtents());
+    }
+
+    @Test
+    public void testTsoTabularDslispParsing() {
+        String tabular = "   USER.SAMPLE.COBOL  MNT01  15  50  1  3390  PO  FB  80  3120\n";
+        List<TSODirectoryEntry> entries = TSODirectoryParser.parse(tabular);
+        assertEquals(1, entries.size());
+        TSODirectoryEntry e = entries.get(0);
+        assertEquals("USER.SAMPLE.COBOL", e.getName());
+        assertEquals("MNT01", e.getVolume());
+        assertEquals(15, e.getTracksAllocated());
+        assertEquals(50, e.getPercentUsed());
+        assertEquals(1, e.getExtents());
+        assertEquals("3390", e.getDevice());
+        assertEquals("PO", e.getDsorg());
+        assertEquals("FB", e.getRecfm());
+        assertEquals(80, e.getLrecl());
+        assertEquals(3120, e.getBlksize());
+    }
+
+    @Test
+    public void testTsoListcatWithSysresAsterisksVolume() {
+        String listcatOutput =
+                "IDCAMS  SYSTEM SERVICES                                           TIME: 02:32:00\n" +
+                "NONVSAM ------- SYS1.ACMDLIB\n" +
+                "     IN-CAT --- SYS1.MCAT.TK5\n" +
+                "     HISTORY\n" +
+                "       OWNER-IDENT-------(NULL)     CREATION----------23.146\n" +
+                "       RELEASE----------------2     EXPIRATION--------00.000\n" +
+                "     VOLUMES\n" +
+                "       VOLSER------------******     DEVTYPE------X'3010200F'     FSEQN------------------0\n" +
+                "     ASSOCIATIONS--------(NULL)\n" +
+                "NONVSAM ------- SYS1.SYSTEM.CMDSBSYS.CSCDATA\n" +
+                "     IN-CAT --- SYS1.MCAT.TK5\n" +
+                "     HISTORY\n" +
+                "       OWNER-IDENT-------(NULL)     CREATION----------23.146\n" +
+                "     VOLUMES\n" +
+                "       VOLSER------------TK5002     DEVTYPE------X'3010200F'     FSEQN------------------0\n" +
+                "     ASSOCIATIONS--------(NULL)\n";
+
+        List<TSODirectoryEntry> entries = TSODirectoryParser.parse(listcatOutput);
+        assertEquals(2, entries.size());
+
+        TSODirectoryEntry sysresEntry = entries.get(0);
+        assertEquals("SYS1.ACMDLIB", sysresEntry.getName());
+        assertEquals("******", sysresEntry.getVolume(), "SYSRES volume with asterisks should be preserved");
+
+        TSODirectoryEntry explicitEntry = entries.get(1);
+        assertEquals("SYS1.SYSTEM.CMDSBSYS.CSCDATA", explicitEntry.getName());
+        assertEquals("TK5002", explicitEntry.getVolume());
+    }
 }

lib3270j/src/test/java/haus/nightmare/lib3270j/testutil/Mock3270Server.java

@@ -54,6 +54,7 @@ public class Mock3270Server implements AutoCloseable {
     private int sequenceNumber = 0;
 
     private final List<byte[]> receivedRecords = new CopyOnWriteArrayList<>();
+    private final List<int[]> receivedCommands = new CopyOnWriteArrayList<>();
     private final AtomicInteger receivedNops = new AtomicInteger(0);
     private final AtomicInteger receivedTimingMarks = new AtomicInteger(0);
 
@@ -66,7 +67,9 @@ public class Mock3270Server implements AutoCloseable {
     }
 
     public Mock3270Server(int requestedPort) throws IOException {
-        this.serverSocket = new ServerSocket(requestedPort, 10, InetAddress.getByName("127.0.0.1"));
+        this.serverSocket = new ServerSocket();
+        this.serverSocket.setReuseAddress(true);
+        this.serverSocket.bind(new InetSocketAddress(InetAddress.getByName("127.0.0.1"), requestedPort), 10);
         this.port = serverSocket.getLocalPort();
         this.translator = new EbcdicTranslator();
         executor.submit(this::acceptLoop);
@@ -126,6 +129,10 @@ public class Mock3270Server implements AutoCloseable {
         return Collections.unmodifiableList(receivedRecords);
     }
 
+    public List<int[]> getReceivedCommands() {
+        return Collections.unmodifiableList(receivedCommands);
+    }
+
     public byte[] getLastReceivedRecord() {
         if (receivedRecords.isEmpty()) return null;
         return receivedRecords.get(receivedRecords.size() - 1);
@@ -285,6 +292,7 @@ public class Mock3270Server implements AutoCloseable {
 
     private void handleOptionCommand(int cmd, int opt) throws IOException {
         log.fine("Mock3270Server: RCVD IAC " + cmd + " opt=" + opt);
+        receivedCommands.add(new int[] { cmd, opt });
         if (cmd == WILL && opt == TELOPT_TN3270E) {
             // Client accepted TN3270E -> Send SB TN3270E SEND DEVICE-TYPE IAC SE
             sendDeviceTypeSend();
@@ -565,6 +573,11 @@ public class Mock3270Server implements AutoCloseable {
         } catch (Exception ignored) {}
         disconnectClient();
         executor.shutdownNow();
+        try {
+            executor.awaitTermination(200, TimeUnit.MILLISECONDS);
+        } catch (InterruptedException e) {
+            Thread.currentThread().interrupt();
+        }
         log.info("Mock3270Server stopped");
     }
 }

lib3270j/src/test/java/haus/nightmare/lib3270j/testutil/Mock3270ServerIntegrationTest.java

@@ -76,8 +76,8 @@ public class Mock3270ServerIntegrationTest {
     public void testSendScreenAndVerifyPresentationSpace() throws Exception {
         ConnectionConfig config = new ConnectionConfig("127.0.0.1", server.getPort(), TerminalModel.IBM_3279_2);
         client = new Telnet3270Client(config);
-        assertTrue(client.connect(8000));
-        assertTrue(server.waitForHandshake(5, TimeUnit.SECONDS));
+        assertTrue(client.connect(8000), "Client should connect to mock server");
+        assertTrue(server.waitForHandshake(5, TimeUnit.SECONDS), "Server handshake should complete within 5s");
         waitForState(client, ConnectionState.CONNECTED_TN3270E, 5000);
 
         // Server sends formatted greeting screen at row 2, col 10
@@ -243,7 +243,10 @@ public class Mock3270ServerIntegrationTest {
         // Disconnect active client connection abruptly
         server.disconnectClient();
 
-        // Wait for client to detect disconnect and reconnect automatically
+        // Wait for client to detect disconnect and enter RECONNECTING
+        waitForState(client, ConnectionState.RECONNECTING, 5000);
+
+        // Wait for client to reconnect automatically
         waitForState(client, ConnectionState.CONNECTED_TN3270E, 8000);
         assertEquals(ConnectionState.CONNECTED_TN3270E, client.getConnectionState());
     }
@@ -290,4 +293,46 @@ public class Mock3270ServerIntegrationTest {
 
         assertTrue(matched, "Fragmented stream must be reassembled and displayed correctly");
     }
+
+    @Test
+    public void testGracefulDisconnectSendsUnbindAndDeNegotiation() throws Exception {
+        ConnectionConfig config = new ConnectionConfig("127.0.0.1", server.getPort(), TerminalModel.IBM_3279_2);
+        client = new Telnet3270Client(config);
+        assertTrue(client.connect(8000));
+        assertTrue(server.waitForHandshake(5, TimeUnit.SECONDS));
+        waitForState(client, ConnectionState.CONNECTED_TN3270E, 5000);
+        assertTrue(client.getTelnetFSM().isTn3270eBound());
+
+        // Perform graceful disconnect
+        client.disconnect();
+
+        // Verify client transitioned to NOT_CONNECTED
+        assertEquals(ConnectionState.NOT_CONNECTED, client.getConnectionState());
+        assertFalse(client.isConnected());
+
+        // Wait briefly for server to process queued records
+        Thread.sleep(150);
+
+        // Verify server received TN3270E UNBIND
+        boolean receivedUnbind = false;
+        for (byte[] rec : server.getReceivedRecords()) {
+            if (rec != null && rec.length > 5 && (rec[0] & 0xFF) == DT_UNBIND) {
+                int reason = rec[5] & 0xFF;
+                assertEquals(UNBIND_NORMAL, reason, "UNBIND reason should be UNBIND_NORMAL (0x01)");
+                receivedUnbind = true;
+                break;
+            }
+        }
+        assertTrue(receivedUnbind, "Server should have received TN3270E UNBIND record");
+
+        // Verify server received Telnet option de-negotiation (WONT TN3270E or DONT TN3270E)
+        boolean receivedWontOrDontTn3270e = false;
+        for (int[] cmd : server.getReceivedCommands()) {
+            if ((cmd[0] == WONT || cmd[0] == DONT) && cmd[1] == TELOPT_TN3270E) {
+                receivedWontOrDontTn3270e = true;
+                break;
+            }
+        }
+        assertTrue(receivedWontOrDontTn3270e, "Server should have received Telnet de-negotiation for TN3270E");
+    }
 }