diff --git a/.gitea/workflows/build.yaml b/.gitea/workflows/build.yaml
index 8f40f8d..dbabe51 100644
--- a/.gitea/workflows/build.yaml
+++ b/.gitea/workflows/build.yaml
@@ -41,6 +41,12 @@ jobs:
         run: |
           chmod +x ./gradlew ./build.sh
 
+      - name: Run Unit Tests
+        run: |
+          ./gradlew testDebugUnitTest --no-daemon
+        env:
+          J3270_DIR: ${{ github.workspace }}/j3270
+
       - name: Build Android APK
         run: |
           ./gradlew assembleDebug --no-daemon
diff --git a/.gitignore b/.gitignore
index 9a06de8..ab8cd1a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -9,3 +9,4 @@ captures/
 .cxx
 *.jar
 !gradle/wrapper/gradle-wrapper.jar
+*.txt
diff --git a/README.md b/README.md
index a3780e8..500afd9 100644
--- a/README.md
+++ b/README.md
@@ -34,20 +34,70 @@ adb install -r a3270.apk
 
 ---
 
+## 📱 Compatibility & System Requirements
+
+- **Minimum Android Version**: Android 7.0 (Nougat) — **API Level 24** (`minSdk 24`)
+- **Target Android Version**: Android 14 — **API Level 34** (`targetSdk 34`)
+- **Compile SDK**: **API Level 34** (`compileSdk 34`)
+- **Architecture**: Universal — pure Kotlin/Java running on ART, fully compatible with all CPU ABIs (`arm64-v8a`, `armeabi-v7a`, `x86`, `x86_64`)
+- **Form Factors**: Adaptive UI scaling optimized for smartphones, foldables, tablets, and Chromebooks (Android runtime)
+- **Input Devices**: Full touch-screen support, native virtual keyboards, and external physical/Bluetooth keyboards
+
+---
+
 ## ✨ Features
 
-- **Modern Jetpack Compose UI**: Responsive, touch-optimized 3270 terminal screen rendering.
-- **TN3270 & TN3270E Protocol Support**: RFC 2355 compliant state machine, negotiation, Device-Type query, and SSL/TLS encryption via `lib3270j`.
-- **On-Screen Function Key Bar**: Quick-access touch bar for PF1–PF24, PA1–PA3, Enter, Clear, Reset, and Attn keys.
-- **IND$FILE File Transfer**: Full mobile UI for **CUT** and **DFT (DDM)** high-speed structured field file transfers with ASCII/binary translation, CRLF handling, and recfm/lrecl formatting for TSO, VM/CMS, and CICS.
-- **OIA Status Line**: Real-time Operator Information Area displaying connection state, keyboard lock, insert mode, cursor row/col, and LU name.
-- **Host Profile Storage**: Save and manage multiple mainframe connection profiles with custom ports, models, and SSL/TLS options.
-- **Background Session Persistence**: Android foreground service keeps your terminal session alive when multitasking.
-- **Terminal Models**:
-  - Model 2 (24x80)
-  - Model 3 (32x80)
-  - Model 4 (43x80)
-  - Model 5 (27x132)
+### 🖥️ Terminal Emulation & Protocol
+- **RFC 2355 TN3270 & TN3270E Engine**: Robust state machine, Option Negotiation, Device-Type Query, and LU name specification powered by `lib3270j`.
+- **Standard & Dynamic Terminal Models**:
+  - Model 2 (24 × 80)
+  - Model 3 (32 × 80)
+  - Model 4 (43 × 80)
+  - Model 5 (27 × 132)
+  - **Dynamic Screen Dimensions**: Configurable custom geometry (rows & columns up to 255 × 255).
+- **EBCDIC Code Pages**: Full character translation across international code pages (037, 1047, 500, etc.).
+
+### 📊 Graphics & Peripherals
+- **GDDM & GOCA Graphics**: Native rendering of Programmed Symbols (PS) and GOCA vector graphics directly in the Compose canvas.
+- **Light Pen Simulation**: Interactive touch support to simulate light pen selection and graphic cursor pick correlation.
+- **IBM 3287 Printer Emulation**: Integrated printer session support for spool/report capture (via associated display LU or dedicated printer LU) with direct printing through Android PrintManager (PDF export / system print).
+
+### 📁 IND$FILE File Transfer
+- Full mobile UI supporting both **CUT** and **DFT (DDM)** high-speed structured field transfers.
+- Compatible with **TSO**, **VM/CMS**, and **CICS** environments.
+- ASCII/binary translation, CRLF conversions, and configurable record format (`recfm`), record length (`lrecl`), and allocation units.
+
+### 🔍 Developer & Productivity Tools
+- **Field Inspector**: Live interactive inspector displaying start/end addresses, length, protection, numeric status, MDT (Modified Data Tag), display intensity, and extended highlighting/color, with one-tap "Jump to Field".
+- **Screen Search / Find**: On-screen text search with case sensitivity, forward/backward navigation, and visual match highlighting.
+- **Screen Exporter**: Export the current screen buffer to **Plain Text**, formatted **HTML**, or **PNG image**, with one-tap clipboard copy and Android system share sheet integration.
+- **Script & Macro Automation**: Built-in script runner supporting automated keystroke and wait sequences (e.g. `[enter]`, `[wait]`, `[tab]`) for login macros and repetitive tasks.
+
+### ✍️ Entry Assist & Typing Modes
+- **Document (DOC) Mode**: Configurable left/right margins, custom tab stops, and end-of-line bell warning.
+- **Word Wrap**: Automatic word wrapping across lines during input.
+- **APL Mode**: Support for APL extended character sets and symbols.
+- **Field Handling**: Automatic field skip (Auto-Skip), Numeric field lock, and Insert Mode auto-reset on AID transmission.
+
+### 🎨 Display, Themes & Ergonomics
+- **Jetpack Compose UI**: Smooth, hardware-accelerated 3270 terminal screen rendering with touch-to-position cursor.
+- **Color Themes**: Light and Dark application themes, 3270 extended color support, and 4-color legacy override mode.
+- **Cursor Customization**: Block and Underline cursor styles with toggleable blinking.
+- **Crosshair Ruler**: Toggleable horizontal and vertical ruler lines following the cursor for easy data tracking.
+- **Block Selection**: Rectangular text selection and copy mode.
+- **OIA Status Line**: Real-time Operator Information Area displaying connection status, keyboard lock, insert mode, cursor row/col, LU name, and inhibit reason codes.
+
+### 🔒 Security, Networking & Storage
+- **SSL / TLS Encryption**: Secure encrypted mainframe sessions with TLS certificate verification.
+- **Interactive Untrusted Certificate Prompt**: Inspect SSL certificates, view full certificate chain details, and accept/reject unverified connections.
+- **Proxy Support**: Connect via HTTP CONNECT, SOCKS4, SOCKS5, and Telnet proxies with optional user/password authentication.
+- **Background Session Persistence**: Android foreground service (`specialUse`) keeps your terminal TCP connection alive with status notifications when multitasking or screen is off.
+- **Host Profile Manager & INI Export**: Save multiple mainframe profiles, configure auto-connect on launch, and export/import configuration in INI format (interoperable with desktop `j3270`).
+
+### ⌨️ Input & Keyboards
+- **On-Screen Function Key Bar**: Two-row responsive touch bar providing PF1–PF24, PA1–PA3, Enter, Clear, Reset, Attn, SysReq, Erase EOF, Erase Input, Tab, BackTab, and D-pad cursor controls with haptic feedback.
+- **Termux-Style Native Input**: Low-latency native input connection with permanent number row and lock protection against soft-keyboard resets.
+- **Hardware Keyboard Support**: Complete physical keyboard integration with F1–F12 (mapped to PF1–PF12 / PF13–PF24 with Shift/Alt), Ctrl shortcuts, dead keys, and international character input.
 
 ---
 
@@ -56,6 +106,7 @@ adb install -r a3270.apk
 ### Prerequisites
 - **Java Development Kit (JDK)**: JDK 17 or JDK 21
 - **Android SDK**: API 34 platforms and build-tools (`ANDROID_HOME` or `ANDROID_SDK_ROOT` set)
+- **Minimum Target Device**: Android 7.0+ (API 24+)
 
 ### 1. Clone Repositories Side-by-Side
 For the easiest setup, clone both `j3270` and `a3270` into the same parent folder:
diff --git a/build.sh b/build.sh
index e6e0e04..76406b6 100755
--- a/build.sh
+++ b/build.sh
@@ -50,7 +50,7 @@ if [ $# -gt 0 ]; then
     ./gradlew "$@"
 else
     echo "Building debug APK..."
-    ./gradlew assembleDebug
+    ./gradlew assembleDebug --no-daemon
 
     APK_PATH="$SCRIPT_DIR/build/outputs/apk/debug/a3270-debug.apk"
     if [ -f "$APK_PATH" ]; then
diff --git a/src/main/java/haus/nightmare/a3270/MainActivity.kt b/src/main/java/haus/nightmare/a3270/MainActivity.kt
index ce67bfa..8638b20 100644
--- a/src/main/java/haus/nightmare/a3270/MainActivity.kt
+++ b/src/main/java/haus/nightmare/a3270/MainActivity.kt
@@ -191,6 +191,29 @@ class MainActivity : ComponentActivity() {
             val alt = event.isAltPressed || (event.metaState and KeyEvent.META_ALT_ON != 0)
 
             // 1. Function Keys (F1..F12 -> PF1..PF12 or PF13..PF24 with Shift or Alt)
+            // Mode toggles matching j3270:
+            // Alt+F1: DOC mode (Entry Assist)
+            // Alt+F2: Word Wrap
+            // Alt+F3: APL Mode
+            if (alt && keyCode == KeyEvent.KEYCODE_F1) {
+                viewModel.toggleDocMode()
+                val isDoc = viewModel.isDocMode.value
+                Toast.makeText(this, "DOC Mode: " + (if (isDoc) "ON" else "OFF"), Toast.LENGTH_SHORT).show()
+                return true
+            }
+            if (alt && keyCode == KeyEvent.KEYCODE_F2) {
+                viewModel.toggleWordWrap()
+                val isWrap = viewModel.isWordWrap.value
+                Toast.makeText(this, "Word Wrap: " + (if (isWrap) "ON" else "OFF"), Toast.LENGTH_SHORT).show()
+                return true
+            }
+            if (alt && keyCode == KeyEvent.KEYCODE_F3) {
+                viewModel.toggleAplMode()
+                val isApl = viewModel.isAplMode.value
+                Toast.makeText(this, "APL Mode: " + (if (isApl) "ON" else "OFF"), Toast.LENGTH_SHORT).show()
+                return true
+            }
+
             if (keyCode in KeyEvent.KEYCODE_F1..KeyEvent.KEYCODE_F12) {
                 val fNum = keyCode - KeyEvent.KEYCODE_F1 + 1
                 val pfNum = if (shift || alt) fNum + 12 else fNum
@@ -339,6 +362,10 @@ class MainActivity : ComponentActivity() {
 
             // 5. Standard Navigation & Special Keys
             when (keyCode) {
+                KeyEvent.KEYCODE_INSERT -> {
+                    viewModel.toggleInsert()
+                    return true
+                }
                 KeyEvent.KEYCODE_DPAD_LEFT -> {
                     viewModel.cursorLeft()
                     return true
@@ -503,6 +530,10 @@ fun MainScreen(
     val blockSelectMode by viewModel.blockSelectMode.collectAsState()
     val uiTheme by viewModel.uiTheme.collectAsState()
     val isInsertMode by viewModel.isInsertMode.collectAsState()
+    val isDocMode by viewModel.isDocMode.collectAsState()
+    val isWordWrap by viewModel.isWordWrap.collectAsState()
+    val isAplMode by viewModel.isAplMode.collectAsState()
+    val fourColorOverride by viewModel.fourColorOverride.collectAsState()
 
     val isNumericField = remember(screenBuffer, cursorAddr, screenVersion) {
         if (screenBuffer != null && screenBuffer?.isFormatted == true) {
@@ -510,15 +541,6 @@ fun MainScreen(
             (fa.toInt() and haus.nightmare.lib3270j.protocol.DS3270Constants.FA_NUMERIC) != 0
         } else false
     }
-    val modelName = remember(rows, cols) {
-        when {
-            rows == 24 && cols == 80 -> "3279-2"
-            rows == 32 && cols == 80 -> "3279-3"
-            rows == 43 && cols == 80 -> "3279-4"
-            rows == 27 && cols == 132 -> "3279-5"
-            else -> "DYNAMIC"
-        }
-    }
 
     var showConnectDialog by remember { mutableStateOf(false) }
     var showFtDialog by remember { mutableStateOf(false) }
@@ -529,8 +551,11 @@ fun MainScreen(
     var showScriptDialog by remember { mutableStateOf(false) }
     var showPrinterSessionDialog by remember { mutableStateOf(false) }
 
+    var terminalInputViewRef by remember { mutableStateOf<TerminalInputView?>(null) }
+
     LaunchedEffect(isFindDialogOpen) {
         if (isFindDialogOpen) {
+            terminalInputViewRef?.hideSoftKeyboard()
             showFindDialog = true
             onSetFindDialogOpen(false)
         }
@@ -538,13 +563,12 @@ fun MainScreen(
 
     LaunchedEffect(isFtDialogOpen) {
         if (isFtDialogOpen) {
+            terminalInputViewRef?.hideSoftKeyboard()
             showFtDialog = true
             onSetFtDialogOpen(false)
         }
     }
 
-    var terminalInputViewRef by remember { mutableStateOf<TerminalInputView?>(null) }
-
     val lifecycleOwner = LocalLifecycleOwner.current
     DisposableEffect(lifecycleOwner) {
         val observer = LifecycleEventObserver { _, event ->
@@ -636,6 +660,7 @@ fun MainScreen(
                 cursorStyle = cursorStyle,
                 isInsertMode = isInsertMode,
                 blockSelectMode = blockSelectMode,
+                fourColorOverride = fourColorOverride,
                 onPasteLineWrap = { text, wrapCol, wordWrap ->
                     viewModel.pasteLineWrap(text, wrapCol, wordWrap)
                 },
@@ -691,18 +716,56 @@ fun MainScreen(
                 connectionState = connectionState,
                 isShiftPressed = isShiftPressed,
                 isLightPenMode = isLightPenMode,
+                isDocMode = isDocMode,
+                isWordWrap = isWordWrap,
+                isAplMode = isAplMode,
+                isInsertMode = isInsertMode,
+                fourColorOverride = fourColorOverride,
                 hapticFeedbackEnabled = hapticFeedback,
                 onClearShift = onClearShift,
-                onConnectClick = { showConnectDialog = true },
+                onConnectClick = {
+                    terminalInputViewRef?.hideSoftKeyboard()
+                    showConnectDialog = true
+                },
                 onDisconnectClick = { viewModel.disconnect() },
-                onFtClick = { showFtDialog = true },
-                onFieldInspectorClick = { showFieldInspectorDialog = true },
-                onFindClick = { showFindDialog = true },
-                onScreenExportClick = { showScreenExportDialog = true },
-                onScriptClick = { showScriptDialog = true },
-                onPrinterSessionClick = { showPrinterSessionDialog = true },
+                onFtClick = {
+                    terminalInputViewRef?.hideSoftKeyboard()
+                    showFtDialog = true
+                },
+                onFieldInspectorClick = {
+                    terminalInputViewRef?.hideSoftKeyboard()
+                    showFieldInspectorDialog = true
+                },
+                onFindClick = {
+                    terminalInputViewRef?.hideSoftKeyboard()
+                    showFindDialog = true
+                },
+                onScreenExportClick = {
+                    terminalInputViewRef?.hideSoftKeyboard()
+                    showScreenExportDialog = true
+                },
+                onScriptClick = {
+                    terminalInputViewRef?.hideSoftKeyboard()
+                    showScriptDialog = true
+                },
+                onPrinterSessionClick = {
+                    terminalInputViewRef?.hideSoftKeyboard()
+                    showPrinterSessionDialog = true
+                },
                 onToggleLightPen = { viewModel.toggleLightPen() },
-                onSettingsClick = { showSettingsDialog = true },
+                onToggleDocMode = { viewModel.toggleDocMode() },
+                onToggleWordWrap = { viewModel.toggleWordWrap() },
+                onToggleAplMode = { viewModel.toggleAplMode() },
+                onToggleInsert = { viewModel.toggleInsert() },
+                onToggleFourColorOverride = {
+                    val next = !fourColorOverride
+                    viewModel.setFourColorOverride(next)
+                    AppSettings.setFourColorOverride(context, next)
+                },
+                onSettingsClick = {
+                    terminalInputViewRef?.hideSoftKeyboard()
+                    showSettingsDialog = true
+                },
                 onSendAid = { aid ->
                     viewModel.sendAid(aid)
                     terminalInputViewRef?.showSoftKeyboard()
@@ -769,20 +832,29 @@ fun MainScreen(
                 isTls = isTlsActive,
                 isTlsVerified = isTlsVerified,
                 graphicsMode = defaultGraphicsMode,
-                codePage = codePage,
                 isLightPenMode = isLightPenMode,
                 isInsertMode = isInsertMode,
+                isDocMode = isDocMode,
+                isWordWrap = isWordWrap,
+                isAplMode = isAplMode,
                 inhibitReason = viewModel.getClient()?.oia?.inputInhibited ?: 0,
                 luName = viewModel.getClient()?.telnetFSM?.connectedLu ?: "",
                 isNumericField = isNumericField,
-                modelName = modelName
+                uiTheme = uiTheme,
+                onToggleDocMode = { viewModel.toggleDocMode() },
+                onToggleWordWrap = { viewModel.toggleWordWrap() },
+                onToggleAplMode = { viewModel.toggleAplMode() },
+                onToggleInsert = { viewModel.toggleInsert() }
             )
         }
     }
 
     if (showConnectDialog) {
         ConnectDialog(
-            onDismiss = { showConnectDialog = false },
+            onDismiss = {
+                showConnectDialog = false
+                terminalInputViewRef?.showSoftKeyboard()
+            },
             onConnect = { host, port, model, dynamicRows, dynamicCols, luName, hostType, useTls, tlsVerifyCert, tn3270e, graphicsMode, cp, pType, pHost, pPort, pUser, pPass ->
                 showConnectDialog = false
                 viewModel.connect(host, port, model, dynamicRows, dynamicCols, luName, hostType, useTls, tlsVerifyCert, tn3270e, graphicsMode, cp, pType, pHost, pPort, pUser, pPass)
@@ -796,7 +868,10 @@ fun MainScreen(
             initialHostType = viewModel.activeHostType,
             ftProgressState = ftState,
             client = viewModel.getClient(),
-            onDismiss = { showFtDialog = false },
+            onDismiss = {
+                showFtDialog = false
+                terminalInputViewRef?.showSoftKeyboard()
+            },
             onStartTransfer = { config ->
                 viewModel.startFileTransfer(config) { error ->
                     if (error != null) {
@@ -825,8 +900,23 @@ fun MainScreen(
             initialStartupBehavior = AppSettings.getStartupBehavior(context).name,
             initialDynamicRows = AppSettings.getDynamicRows(context),
             initialDynamicCols = AppSettings.getDynamicCols(context),
-            onDismiss = { showSettingsDialog = false },
-            onSave = { mask, blink, haptic, verify, gfx, defaultCp, theme, crosshair, style, blockSel, startup, dynRows, dynCols ->
+            initialEntryAssistDocMode = isDocMode,
+            initialEntryAssistWordWrap = isWordWrap,
+            initialEntryAssistStartCol = AppSettings.getEntryAssistStartCol(context),
+            initialEntryAssistEndCol = AppSettings.getEntryAssistEndCol(context),
+            initialEntryAssistBell = AppSettings.getEntryAssistBell(context),
+            initialEntryAssistBellCol = AppSettings.getEntryAssistBellCol(context),
+            initialEntryAssistTabStops = AppSettings.getEntryAssistTabStops(context),
+            initialInsertOffOnAid = AppSettings.getInsertOffOnAid(context),
+            initialFourColorOverride = fourColorOverride,
+            initialNumericFieldLock = AppSettings.getNumericFieldLock(context),
+            initialAutoSkipEnabled = AppSettings.getAutoSkipEnabled(context),
+            onDismiss = {
+                showSettingsDialog = false
+                terminalInputViewRef?.showSoftKeyboard()
+            },
+            onSave = { mask, blink, haptic, verify, gfx, defaultCp, theme, crosshair, style, blockSel, startup, dynRows, dynCols,
+                       doc, wrap, startCol, endCol, bell, bellCol, tabs, resetIns, fourCol, numLk, autoSk ->
                 showSettingsDialog = false
                 viewModel.updateSettings(mask, blink, haptic, verify, gfx, defaultCp)
                 viewModel.setUiTheme(theme)
@@ -836,6 +926,18 @@ fun MainScreen(
                 AppSettings.setStartupBehavior(context, AppSettings.StartupBehavior.valueOf(startup))
                 AppSettings.setDynamicRows(context, dynRows)
                 AppSettings.setDynamicCols(context, dynCols)
+                AppSettings.setEntryAssistDocMode(context, doc)
+                AppSettings.setEntryAssistWordWrap(context, wrap)
+                AppSettings.setEntryAssistStartCol(context, startCol)
+                AppSettings.setEntryAssistEndCol(context, endCol)
+                AppSettings.setEntryAssistBell(context, bell)
+                AppSettings.setEntryAssistBellCol(context, bellCol)
+                AppSettings.setEntryAssistTabStops(context, tabs)
+                AppSettings.setInsertOffOnAid(context, resetIns)
+                AppSettings.setFourColorOverride(context, fourCol)
+                AppSettings.setNumericFieldLock(context, numLk)
+                AppSettings.setAutoSkipEnabled(context, autoSk)
+                viewModel.reloadSettings()
                 terminalInputViewRef?.showSoftKeyboard()
             }
         )
@@ -845,7 +947,10 @@ fun MainScreen(
         FieldInspectorDialog(
             client = viewModel.getClient(),
             screenVersion = screenVersion,
-            onDismiss = { showFieldInspectorDialog = false },
+            onDismiss = {
+                showFieldInspectorDialog = false
+                terminalInputViewRef?.showSoftKeyboard()
+            },
             onJumpToField = { addr ->
                 viewModel.setCursor(addr)
                 terminalInputViewRef?.showSoftKeyboard()
@@ -856,7 +961,10 @@ fun MainScreen(
     if (showFindDialog) {
         FindDialog(
             cols = cols,
-            onDismiss = { showFindDialog = false },
+            onDismiss = {
+                showFindDialog = false
+                terminalInputViewRef?.showSoftKeyboard()
+            },
             onFind = { query: String, matchCase: Boolean, forward: Boolean ->
                 viewModel.find(query, matchCase, forward)
             },
@@ -874,13 +982,19 @@ fun MainScreen(
             programSymbolManager = viewModel.getClient()?.programSymbolManager,
             graphicsPlane = viewModel.getClient()?.graphicsPlane,
             maskHidden = maskHiddenInput,
-            onDismiss = { showScreenExportDialog = false }
+            onDismiss = {
+                showScreenExportDialog = false
+                terminalInputViewRef?.showSoftKeyboard()
+            }
         )
     }
 
     if (showScriptDialog) {
         ScriptDialog(
-            onDismiss = { showScriptDialog = false },
+            onDismiss = {
+                showScriptDialog = false
+                terminalInputViewRef?.showSoftKeyboard()
+            },
             onExecuteScript = { script: String, onStatus: (String) -> Unit, onComplete: (String?) -> Unit ->
                 viewModel.executeScript(script, onStatus, onComplete)
             }
@@ -893,7 +1007,10 @@ fun MainScreen(
             initialHost = activeHost,
             initialCodePage = codePage,
             initialUseTls = isTlsActive,
-            onDismiss = { showPrinterSessionDialog = false }
+            onDismiss = {
+                showPrinterSessionDialog = false
+                terminalInputViewRef?.showSoftKeyboard()
+            }
         )
     }
 
diff --git a/src/main/java/haus/nightmare/a3270/TerminalViewModel.kt b/src/main/java/haus/nightmare/a3270/TerminalViewModel.kt
index 28a97f3..01690a8 100644
--- a/src/main/java/haus/nightmare/a3270/TerminalViewModel.kt
+++ b/src/main/java/haus/nightmare/a3270/TerminalViewModel.kt
@@ -53,6 +53,12 @@ sealed interface TerminalInputAction {
     data object Dup : TerminalInputAction
     data object FieldMark : TerminalInputAction
     data object ToggleInsert : TerminalInputAction
+    data object ToggleDocMode : TerminalInputAction
+    data object ToggleWordWrap : TerminalInputAction
+    data object ToggleApl : TerminalInputAction
+    data class SetDocMode(val enabled: Boolean) : TerminalInputAction
+    data class SetWordWrap(val enabled: Boolean) : TerminalInputAction
+    data class SetAplMode(val enabled: Boolean) : TerminalInputAction
     data class SetCursor(val baddr: Int) : TerminalInputAction
     data class LightPenSelect(val baddr: Int) : TerminalInputAction
 }
@@ -161,6 +167,18 @@ class TerminalViewModel(application: Application) : AndroidViewModel(application
     private val _isInsertMode = MutableStateFlow(false)
     val isInsertMode: StateFlow<Boolean> = _isInsertMode.asStateFlow()
 
+    private val _isDocMode = MutableStateFlow(AppSettings.getEntryAssistDocMode(application))
+    val isDocMode: StateFlow<Boolean> = _isDocMode.asStateFlow()
+
+    private val _isWordWrap = MutableStateFlow(AppSettings.getEntryAssistWordWrap(application))
+    val isWordWrap: StateFlow<Boolean> = _isWordWrap.asStateFlow()
+
+    private val _isAplMode = MutableStateFlow(false)
+    val isAplMode: StateFlow<Boolean> = _isAplMode.asStateFlow()
+
+    private val _fourColorOverride = MutableStateFlow(AppSettings.getFourColorOverride(application))
+    val fourColorOverride: StateFlow<Boolean> = _fourColorOverride.asStateFlow()
+
     fun toggleLightPen() {
         _isLightPenMode.value = !_isLightPenMode.value
     }
@@ -193,6 +211,74 @@ class TerminalViewModel(application: Application) : AndroidViewModel(application
         _uiTheme.value = theme
     }
 
+    fun toggleDocMode() {
+        inputChannel.trySend(TerminalInputAction.ToggleDocMode)
+    }
+
+    fun setDocMode(enabled: Boolean) {
+        inputChannel.trySend(TerminalInputAction.SetDocMode(enabled))
+    }
+
+    fun toggleWordWrap() {
+        inputChannel.trySend(TerminalInputAction.ToggleWordWrap)
+    }
+
+    fun setWordWrap(enabled: Boolean) {
+        inputChannel.trySend(TerminalInputAction.SetWordWrap(enabled))
+    }
+
+    fun toggleAplMode() {
+        inputChannel.trySend(TerminalInputAction.ToggleApl)
+    }
+
+    fun setAplMode(enabled: Boolean) {
+        inputChannel.trySend(TerminalInputAction.SetAplMode(enabled))
+    }
+
+    fun setFourColorOverride(override: Boolean) {
+        AppSettings.setFourColorOverride(getApplication(), override)
+        _fourColorOverride.value = override
+        _screenVersion.value = System.currentTimeMillis()
+    }
+
+    fun toggleFourColorOverride() {
+        setFourColorOverride(!_fourColorOverride.value)
+    }
+
+    fun playBellSound() {
+        try {
+            val tg = android.media.ToneGenerator(android.media.AudioManager.STREAM_NOTIFICATION, 80)
+            tg.startTone(android.media.ToneGenerator.TONE_PROP_BEEP, 150)
+        } catch (_: Throwable) {}
+    }
+
+    fun applyModeSettings() {
+        val app = getApplication<Application>()
+        val c = client ?: return
+        val sb = c.screenBuffer
+        if (sb != null) {
+            sb.isEntryAssistDOCmode = AppSettings.getEntryAssistDocMode(app)
+            sb.isEntryAssistWordWrap = AppSettings.getEntryAssistWordWrap(app)
+            sb.setLeftMargin((AppSettings.getEntryAssistStartCol(app) - 1).coerceAtLeast(0))
+            sb.setRightMargin((AppSettings.getEntryAssistEndCol(app) - 1).coerceAtLeast(0))
+            sb.setWordTabPositions(AppSettings.getEntryAssistTabStopsArray(app))
+        }
+        val ip = c.inputProcessor
+        if (ip != null) {
+            ip.isBellEnabled = AppSettings.getEntryAssistBell(app)
+            ip.bellColumn = (AppSettings.getEntryAssistBellCol(app) - 1).coerceAtLeast(0)
+            ip.isInsertOffOnAid = AppSettings.getInsertOffOnAid(app)
+            ip.isNumericFieldLock = AppSettings.getNumericFieldLock(app)
+            ip.isAutoSkipEnabled = AppSettings.getAutoSkipEnabled(app)
+        }
+        _fourColorOverride.value = AppSettings.getFourColorOverride(app)
+        _isDocMode.value = c.isDocMode
+        _isWordWrap.value = c.isWordWrap
+        _isAplMode.value = c.isAplMode
+        _isInsertMode.value = c.isInsertMode
+        _screenVersion.value = System.currentTimeMillis()
+    }
+
     fun reloadSettings() {
         val app = getApplication<Application>()
         _maskHiddenInput.value = AppSettings.isMaskHiddenInputEnabled(app)
@@ -205,6 +291,8 @@ class TerminalViewModel(application: Application) : AndroidViewModel(application
         _cursorStyle.value = AppSettings.getCursorStyle(app)
         _blockSelectMode.value = AppSettings.isBlockSelectModeEnabled(app)
         _uiTheme.value = AppSettings.getUiTheme(app)
+        _fourColorOverride.value = AppSettings.getFourColorOverride(app)
+        applyModeSettings()
     }
 
     fun pasteLineWrap(text: String, endCol: Int, wordWrap: Boolean) {
@@ -472,8 +560,48 @@ class TerminalViewModel(application: Application) : AndroidViewModel(application
                 }
                 is TerminalInputAction.ToggleInsert -> {
                     if (!isNvt) {
-                        ip.processToggleInsert()
-                        _isInsertMode.value = ip.isInsertMode
+                        c.toggleInsert()
+                        _isInsertMode.value = c.isInsertMode
+                    }
+                }
+                is TerminalInputAction.ToggleDocMode -> {
+                    if (!isNvt) {
+                        c.toggleDocMode()
+                        AppSettings.setEntryAssistDocMode(getApplication(), c.isDocMode)
+                        _isDocMode.value = c.isDocMode
+                    }
+                }
+                is TerminalInputAction.ToggleWordWrap -> {
+                    if (!isNvt) {
+                        c.toggleWordWrap()
+                        AppSettings.setEntryAssistWordWrap(getApplication(), c.isWordWrap)
+                        _isWordWrap.value = c.isWordWrap
+                    }
+                }
+                is TerminalInputAction.ToggleApl -> {
+                    if (!isNvt) {
+                        c.toggleAplMode()
+                        _isAplMode.value = c.isAplMode
+                    }
+                }
+                is TerminalInputAction.SetDocMode -> {
+                    if (!isNvt) {
+                        c.isDocMode = action.enabled
+                        AppSettings.setEntryAssistDocMode(getApplication(), action.enabled)
+                        _isDocMode.value = action.enabled
+                    }
+                }
+                is TerminalInputAction.SetWordWrap -> {
+                    if (!isNvt) {
+                        c.isWordWrap = action.enabled
+                        AppSettings.setEntryAssistWordWrap(getApplication(), action.enabled)
+                        _isWordWrap.value = action.enabled
+                    }
+                }
+                is TerminalInputAction.SetAplMode -> {
+                    if (!isNvt) {
+                        c.isAplMode = action.enabled
+                        _isAplMode.value = action.enabled
                     }
                 }
                 is TerminalInputAction.SetCursor -> {
@@ -769,6 +897,20 @@ class TerminalViewModel(application: Application) : AndroidViewModel(application
                     _isKeyboardLocked.value = locked
                 }
 
+                newClient.inputProcessor.setBellListener {
+                    playBellSound()
+                }
+
+                newClient.oia.registerOIAListener(object : haus.nightmare.lib3270j.ecl.ECLOIAListener {
+                    override fun oiaChanged(event: haus.nightmare.lib3270j.ecl.ECLOIAEvent) {
+                        _isInsertMode.value = newClient.isInsertMode
+                        _isDocMode.value = newClient.isDocMode
+                        _isWordWrap.value = newClient.isWordWrap
+                        _isAplMode.value = newClient.isAplMode
+                        _screenVersion.value = System.currentTimeMillis()
+                    }
+                })
+
                 newClient.addScreenUpdateListener(object : ScreenUpdateListener {
                     override fun onScreenUpdated() {
                         val buf = newClient.screenBuffer
@@ -779,6 +921,10 @@ class TerminalViewModel(application: Application) : AndroidViewModel(application
                             _cursorAddress.value = buf.cursorAddress
                         }
                         _isKeyboardLocked.value = newClient.inputProcessor.isKeyboardLocked
+                        _isInsertMode.value = newClient.isInsertMode
+                        _isDocMode.value = newClient.isDocMode
+                        _isWordWrap.value = newClient.isWordWrap
+                        _isAplMode.value = newClient.isAplMode
                         _screenVersion.value = System.currentTimeMillis()
 
                         // Drive CUT mode file transfers if active
@@ -804,6 +950,7 @@ class TerminalViewModel(application: Application) : AndroidViewModel(application
 
                     override fun onSoundAlarm() {
                         log.fine("Sound Alarm")
+                        playBellSound()
                     }
                 })
 
@@ -811,6 +958,8 @@ class TerminalViewModel(application: Application) : AndroidViewModel(application
                 _cols.value = model.defaultCols
                 _screenBuffer.value = newClient.screenBuffer
 
+                applyModeSettings()
+
                 newClient.connect()
             } catch (e: Throwable) {
                 log.severe("Failed to connect: ${e.message}")
diff --git a/src/main/java/haus/nightmare/a3270/graphics/AndroidCanvasRenderer.kt b/src/main/java/haus/nightmare/a3270/graphics/AndroidCanvasRenderer.kt
new file mode 100644
index 0000000..c288b44
--- /dev/null
+++ b/src/main/java/haus/nightmare/a3270/graphics/AndroidCanvasRenderer.kt
@@ -0,0 +1,49 @@
+package haus.nightmare.a3270.graphics
+
+import android.graphics.Bitmap
+import android.graphics.Canvas
+import android.graphics.Paint
+import android.graphics.RectF
+import haus.nightmare.lib3270j.graphics.PixelBuffer
+
+/**
+ * Android bridge for translating lib3270j PixelBuffer into Android Bitmaps and rendering onto Canvas.
+ */
+object AndroidCanvasRenderer {
+
+    /**
+     * Converts a PixelBuffer into an Android Bitmap using ARGB_8888 configuration.
+     */
+    fun toBitmap(buffer: PixelBuffer?): Bitmap? {
+        if (buffer == null) return null
+        val w = buffer.width
+        val h = buffer.height
+        if (w <= 0 || h <= 0) return null
+        val pixels = buffer.pixels ?: return null
+        return Bitmap.createBitmap(pixels, w, h, Bitmap.Config.ARGB_8888)
+    }
+
+    /**
+     * Draws the given PixelBuffer onto an Android Canvas scaled to the destination rectangle.
+     */
+    fun drawPixelBuffer(
+        canvas: Canvas,
+        buffer: PixelBuffer?,
+        dstRect: RectF,
+        paint: Paint? = null
+    ) {
+        val bmp = toBitmap(buffer) ?: return
+        canvas.drawBitmap(bmp, null, dstRect, paint)
+    }
+
+    /**
+     * Copies the PixelBuffer contents into an existing mutable Bitmap.
+     */
+    fun copyIntoBitmap(buffer: PixelBuffer, target: Bitmap) {
+        val pixels = buffer.pixels ?: return
+        val w = minOf(buffer.width, target.width)
+        val h = minOf(buffer.height, target.height)
+        if (w <= 0 || h <= 0) return
+        target.setPixels(pixels, 0, buffer.width, 0, 0, w, h)
+    }
+}
diff --git a/src/main/java/haus/nightmare/a3270/storage/AppSettings.kt b/src/main/java/haus/nightmare/a3270/storage/AppSettings.kt
index e87ddb4..28da9a4 100644
--- a/src/main/java/haus/nightmare/a3270/storage/AppSettings.kt
+++ b/src/main/java/haus/nightmare/a3270/storage/AppSettings.kt
@@ -29,6 +29,19 @@ object AppSettings {
     private const val KEY_DYNAMIC_ROWS = "dynamic_rows"
     private const val KEY_DYNAMIC_COLS = "dynamic_cols"
 
+    // Entry Assist & Modes aligned with j3270
+    private const val KEY_ENTRY_ASSIST_DOC_MODE = "entry_assist_doc_mode"
+    private const val KEY_ENTRY_ASSIST_WORD_WRAP = "entry_assist_word_wrap"
+    private const val KEY_ENTRY_ASSIST_START_COL = "entry_assist_start_col"
+    private const val KEY_ENTRY_ASSIST_END_COL = "entry_assist_end_col"
+    private const val KEY_ENTRY_ASSIST_BELL = "entry_assist_bell"
+    private const val KEY_ENTRY_ASSIST_BELL_COL = "entry_assist_bell_col"
+    private const val KEY_ENTRY_ASSIST_TAB_STOPS = "entry_assist_tab_stops"
+    private const val KEY_INSERT_OFF_ON_AID = "insert_off_on_aid"
+    private const val KEY_FOUR_COLOR_OVERRIDE = "four_color_override"
+    private const val KEY_NUMERIC_FIELD_LOCK = "numeric_field_lock"
+    private const val KEY_AUTO_SKIP_ENABLED = "auto_skip_enabled"
+
     enum class StartupBehavior {
         SHOW_CONNECT,
         DO_NOTHING,
@@ -155,6 +168,111 @@ object AppSettings {
         getPrefs(context).edit().putInt(KEY_DYNAMIC_COLS, cols.coerceIn(80, 255)).apply()
     }
 
+    // ========== Entry Assist (Document Mode) ==========
+    fun getEntryAssistDocMode(context: Context): Boolean {
+        return getPrefs(context).getBoolean(KEY_ENTRY_ASSIST_DOC_MODE, false)
+    }
+
+    fun setEntryAssistDocMode(context: Context, enabled: Boolean) {
+        getPrefs(context).edit().putBoolean(KEY_ENTRY_ASSIST_DOC_MODE, enabled).apply()
+    }
+
+    fun getEntryAssistWordWrap(context: Context): Boolean {
+        return getPrefs(context).getBoolean(KEY_ENTRY_ASSIST_WORD_WRAP, false)
+    }
+
+    fun setEntryAssistWordWrap(context: Context, enabled: Boolean) {
+        getPrefs(context).edit().putBoolean(KEY_ENTRY_ASSIST_WORD_WRAP, enabled).apply()
+    }
+
+    fun getEntryAssistStartCol(context: Context): Int {
+        return getPrefs(context).getInt(KEY_ENTRY_ASSIST_START_COL, 1).coerceIn(1, 80)
+    }
+
+    fun setEntryAssistStartCol(context: Context, col: Int) {
+        getPrefs(context).edit().putInt(KEY_ENTRY_ASSIST_START_COL, col.coerceIn(1, 80)).apply()
+    }
+
+    fun getEntryAssistEndCol(context: Context): Int {
+        return getPrefs(context).getInt(KEY_ENTRY_ASSIST_END_COL, 80).coerceIn(1, 80)
+    }
+
+    fun setEntryAssistEndCol(context: Context, col: Int) {
+        getPrefs(context).edit().putInt(KEY_ENTRY_ASSIST_END_COL, col.coerceIn(1, 80)).apply()
+    }
+
+    fun getEntryAssistBell(context: Context): Boolean {
+        return getPrefs(context).getBoolean(KEY_ENTRY_ASSIST_BELL, false)
+    }
+
+    fun setEntryAssistBell(context: Context, enabled: Boolean) {
+        getPrefs(context).edit().putBoolean(KEY_ENTRY_ASSIST_BELL, enabled).apply()
+    }
+
+    fun getEntryAssistBellCol(context: Context): Int {
+        return getPrefs(context).getInt(KEY_ENTRY_ASSIST_BELL_COL, 75).coerceIn(1, 80)
+    }
+
+    fun setEntryAssistBellCol(context: Context, col: Int) {
+        getPrefs(context).edit().putInt(KEY_ENTRY_ASSIST_BELL_COL, col.coerceIn(1, 80)).apply()
+    }
+
+    fun getEntryAssistTabStops(context: Context): String {
+        return getPrefs(context).getString(KEY_ENTRY_ASSIST_TAB_STOPS, "5,10,15,20,25,30,35,40,45,50,55,60,65,70,75")
+            ?: "5,10,15,20,25,30,35,40,45,50,55,60,65,70,75"
+    }
+
+    fun setEntryAssistTabStops(context: Context, stops: String) {
+        getPrefs(context).edit().putString(KEY_ENTRY_ASSIST_TAB_STOPS, stops).apply()
+    }
+
+    fun getEntryAssistTabStopsArray(context: Context): IntArray {
+        val s = getEntryAssistTabStops(context)
+        if (s.isBlank()) return intArrayOf()
+        val parts = s.split(",")
+        val list = mutableListOf<Int>()
+        for (p in parts) {
+            val v = p.trim().toIntOrNull()
+            if (v != null && v > 0) {
+                list.add(v - 1)
+            }
+        }
+        return list.toIntArray()
+    }
+
+    // ========== Terminal Operational Modes ==========
+    fun getInsertOffOnAid(context: Context): Boolean {
+        return getPrefs(context).getBoolean(KEY_INSERT_OFF_ON_AID, true)
+    }
+
+    fun setInsertOffOnAid(context: Context, enabled: Boolean) {
+        getPrefs(context).edit().putBoolean(KEY_INSERT_OFF_ON_AID, enabled).apply()
+    }
+
+    fun getFourColorOverride(context: Context): Boolean {
+        return getPrefs(context).getBoolean(KEY_FOUR_COLOR_OVERRIDE, false)
+    }
+
+    fun setFourColorOverride(context: Context, enabled: Boolean) {
+        getPrefs(context).edit().putBoolean(KEY_FOUR_COLOR_OVERRIDE, enabled).apply()
+    }
+
+    fun getNumericFieldLock(context: Context): Boolean {
+        return getPrefs(context).getBoolean(KEY_NUMERIC_FIELD_LOCK, true)
+    }
+
+    fun setNumericFieldLock(context: Context, enabled: Boolean) {
+        getPrefs(context).edit().putBoolean(KEY_NUMERIC_FIELD_LOCK, enabled).apply()
+    }
+
+    fun getAutoSkipEnabled(context: Context): Boolean {
+        return getPrefs(context).getBoolean(KEY_AUTO_SKIP_ENABLED, true)
+    }
+
+    fun setAutoSkipEnabled(context: Context, enabled: Boolean) {
+        getPrefs(context).edit().putBoolean(KEY_AUTO_SKIP_ENABLED, enabled).apply()
+    }
+
     // ========== INI Config Export / Import ==========
 
     fun exportToIni(context: Context, writer: Writer) {
@@ -186,6 +304,23 @@ object AppSettings {
         p.println("blockSelectMode = ${isBlockSelectModeEnabled(context)}")
         p.println()
 
+        p.println("[entryassist]")
+        p.println("docMode = ${getEntryAssistDocMode(context)}")
+        p.println("wordWrap = ${getEntryAssistWordWrap(context)}")
+        p.println("startCol = ${getEntryAssistStartCol(context)}")
+        p.println("endCol = ${getEntryAssistEndCol(context)}")
+        p.println("bell = ${getEntryAssistBell(context)}")
+        p.println("bellCol = ${getEntryAssistBellCol(context)}")
+        p.println("tabStops = ${getEntryAssistTabStops(context)}")
+        p.println()
+
+        p.println("[modes]")
+        p.println("insertOffOnAid = ${getInsertOffOnAid(context)}")
+        p.println("fourColorOverride = ${getFourColorOverride(context)}")
+        p.println("numericFieldLock = ${getNumericFieldLock(context)}")
+        p.println("autoSkip = ${getAutoSkipEnabled(context)}")
+        p.println()
+
         p.println("[graphics]")
         p.println("graphicsMode = ${getDefaultGraphicsMode(context)}")
         p.println()
@@ -236,6 +371,25 @@ object AppSettings {
                     "blockselectmode" -> setBlockSelectModeEnabled(context, value.toBoolean())
                 }
             }
+            "entryassist" -> {
+                when (key.lowercase(Locale.US)) {
+                    "docmode", "entryassistdocmode" -> setEntryAssistDocMode(context, value.toBoolean())
+                    "wordwrap", "entryassistwordwrap" -> setEntryAssistWordWrap(context, value.toBoolean())
+                    "startcol", "entryassiststartcol" -> value.toIntOrNull()?.let { setEntryAssistStartCol(context, it) }
+                    "endcol", "entryassistendcol" -> value.toIntOrNull()?.let { setEntryAssistEndCol(context, it) }
+                    "bell", "entryassistbell" -> setEntryAssistBell(context, value.toBoolean())
+                    "bellcol", "entryassistbellcol" -> value.toIntOrNull()?.let { setEntryAssistBellCol(context, it) }
+                    "tabstops", "entryassisttabstops" -> setEntryAssistTabStops(context, value)
+                }
+            }
+            "modes" -> {
+                when (key.lowercase(Locale.US)) {
+                    "insertoffonaid" -> setInsertOffOnAid(context, value.toBoolean())
+                    "fourcoloroverride" -> setFourColorOverride(context, value.toBoolean())
+                    "numericfieldlock" -> setNumericFieldLock(context, value.toBoolean())
+                    "autoskip", "autoskipenabled" -> setAutoSkipEnabled(context, value.toBoolean())
+                }
+            }
             "graphics" -> {
                 if (key.equals("graphicsmode", ignoreCase = true) || key.equals("mode", ignoreCase = true)) {
                     setDefaultGraphicsMode(context, value.uppercase(Locale.US))
diff --git a/src/main/java/haus/nightmare/a3270/ui/FileTransferDialog.kt b/src/main/java/haus/nightmare/a3270/ui/FileTransferDialog.kt
index ef056e6..e59cc21 100644
--- a/src/main/java/haus/nightmare/a3270/ui/FileTransferDialog.kt
+++ b/src/main/java/haus/nightmare/a3270/ui/FileTransferDialog.kt
@@ -37,6 +37,56 @@ private val TerminalKeyboardOptions = KeyboardOptions(
     keyboardType = KeyboardType.Ascii
 )
 
+data class LastTransferState(
+    val hostFile: String = "",
+    val localFile: String = "",
+    val isReceive: Boolean = true,
+    val isAscii: Boolean = true,
+    val hostType: FTConfig.HostType = FTConfig.HostType.TSO,
+    val recfm: FTConfig.RecordFormat = FTConfig.RecordFormat.DEFAULT,
+    val lreclStr: String = "",
+    val blksizeStr: String = "",
+    val spaceStr: String = "",
+    val cmsOptions: String = ""
+)
+private var lastTransferState: LastTransferState? = null
+
+fun formatHostFilename(localName: String, hostType: FTConfig.HostType): String {
+    if (hostType == FTConfig.HostType.CMS) {
+        val lastDot = localName.lastIndexOf('.')
+        return if (lastDot > 0) {
+            val fn = localName.substring(0, lastDot).replace(Regex("[^a-zA-Z0-9]"), "").uppercase()
+            val ft = localName.substring(lastDot + 1).replace(Regex("[^a-zA-Z0-9]"), "").uppercase()
+            "${fn.ifBlank { "FILE" }} ${ft.ifBlank { "TEXT" }} A"
+        } else {
+            val clean = localName.replace(Regex("[^a-zA-Z0-9]"), "").uppercase()
+            "${clean.ifBlank { "FILE" }} FILE A"
+        }
+    } else if (hostType == FTConfig.HostType.TSO) {
+        val cleanBase = localName.substringBeforeLast('.').replace(Regex("[^a-zA-Z0-9]"), "").uppercase()
+        return "'${cleanBase.ifBlank { "DATA" }}'"
+    }
+    return localName
+}
+
+fun formatLocalFilenameFromHost(hostFile: String, hostType: FTConfig.HostType): String {
+    val cleanName = hostFile.trim('\'', '"')
+    if (hostType == FTConfig.HostType.CMS) {
+        val tokens = cleanName.trim().split(Regex("\\s+"))
+        if (tokens.size >= 2) {
+            return "${tokens[0].lowercase()}.${tokens[1].lowercase()}"
+        } else if (tokens.size == 1 && tokens[0].isNotBlank()) {
+            return "${tokens[0].lowercase()}.txt"
+        }
+    } else {
+        val lastDot = cleanName.lastIndexOf('.')
+        if (lastDot > 0) {
+            return "${cleanName.substring(lastDot + 1).lowercase()}.txt"
+        }
+    }
+    return if (cleanName.isNotBlank()) "${cleanName.lowercase()}.txt" else "download.txt"
+}
+
 @Composable
 fun FileTransferDialog(
     initialHostType: String = "TSO",
@@ -54,15 +104,17 @@ fun FileTransferDialog(
         else -> FTConfig.HostType.TSO
     }
 
-    var hostFile by remember { mutableStateOf("") }
-    var localFile by remember { mutableStateOf("") }
+    var hostFile by remember { mutableStateOf(lastTransferState?.hostFile ?: "") }
+    var localFile by remember { mutableStateOf(lastTransferState?.localFile ?: "") }
     var localDisplayName by remember { mutableStateOf("") }
-    var isReceive by remember { mutableStateOf(true) }
-    var isAscii by remember { mutableStateOf(true) }
-    var hostType by remember { mutableStateOf(initialTypeEnum) }
-    var recfm by remember { mutableStateOf(FTConfig.RecordFormat.DEFAULT) }
-    var lreclStr by remember { mutableStateOf("") }
-    var blksizeStr by remember { mutableStateOf("") }
+    var isReceive by remember { mutableStateOf(lastTransferState?.isReceive ?: true) }
+    var isAscii by remember { mutableStateOf(lastTransferState?.isAscii ?: true) }
+    var hostType by remember { mutableStateOf(lastTransferState?.hostType ?: initialTypeEnum) }
+    var recfm by remember { mutableStateOf(lastTransferState?.recfm ?: FTConfig.RecordFormat.DEFAULT) }
+    var lreclStr by remember { mutableStateOf(lastTransferState?.lreclStr ?: "") }
+    var blksizeStr by remember { mutableStateOf(lastTransferState?.blksizeStr ?: "") }
+    var spaceStr by remember { mutableStateOf(lastTransferState?.spaceStr ?: "") }
+    var cmsOptions by remember { mutableStateOf(lastTransferState?.cmsOptions ?: "") }
     var overwrite by remember { mutableStateOf(true) }
     var showBrowseDialog by remember { mutableStateOf(false) }
 
@@ -86,8 +138,7 @@ fun FileTransferDialog(
                 localFile = tempFile.absolutePath
                 localDisplayName = displayName
                 if (hostFile.isBlank()) {
-                    val cleanBase = displayName.substringBeforeLast('.').replace(Regex("[^a-zA-Z0-9]"), "").uppercase()
-                    hostFile = if (hostType == FTConfig.HostType.TSO) "'$cleanBase'" else "$cleanBase FILE A"
+                    hostFile = formatHostFilename(displayName, hostType)
                 }
                 Toast.makeText(context, "Selected: $displayName", Toast.LENGTH_SHORT).show()
             } catch (e: Exception) {
@@ -143,8 +194,7 @@ fun FileTransferDialog(
             onSelectDataset = { selected ->
                 hostFile = selected
                 if (localFile.isBlank()) {
-                    val base = selected.trim('\'').substringAfterLast('.').substringAfterLast(' ')
-                    val safeName = if (base.isNotBlank()) "$base.txt" else "download.txt"
+                    val safeName = formatLocalFilenameFromHost(selected, hostType)
                     val tempDir = File(context.cacheDir, "ft_download").apply { if (!exists()) mkdirs() }
                     val tempFile = File(tempDir, safeName)
                     localFile = tempFile.absolutePath
@@ -361,8 +411,7 @@ fun FileTransferDialog(
                             onClick = {
                                 if (isReceive) {
                                     val defName = if (hostFile.isNotBlank()) {
-                                        val base = hostFile.trim('\'').substringAfterLast('.').substringAfterLast(' ')
-                                        if (base.isNotBlank()) "$base.txt" else "download.txt"
+                                        formatLocalFilenameFromHost(hostFile, hostType)
                                     } else "download.txt"
                                     createDocumentLauncher.launch(defName)
                                 } else {
@@ -467,10 +516,35 @@ fun FileTransferDialog(
                             onValueChange = { blksizeStr = it.filter { c -> c.isDigit() } },
                             label = { Text("BLKSIZE", fontSize = 11.sp) },
                             singleLine = true,
-                            keyboardOptions = TerminalKeyboardOptions.copy(imeAction = ImeAction.Done),
+                            keyboardOptions = TerminalKeyboardOptions.copy(imeAction = ImeAction.Next),
                             modifier = Modifier.weight(1f)
                         )
                     }
+
+                    Spacer(modifier = Modifier.height(4.dp))
+                    OutlinedTextField(
+                        value = spaceStr,
+                        onValueChange = { spaceStr = it },
+                        label = { Text("SPACE (Allocation)", fontSize = 11.sp) },
+                        placeholder = { Text("e.g. (1,1) cyl or 5,2") },
+                        singleLine = true,
+                        keyboardOptions = TerminalKeyboardOptions.copy(imeAction = ImeAction.Done),
+                        modifier = Modifier.fillMaxWidth()
+                    )
+                }
+
+                // CMS Options
+                if (hostType == FTConfig.HostType.CMS) {
+                    Spacer(modifier = Modifier.height(4.dp))
+                    OutlinedTextField(
+                        value = cmsOptions,
+                        onValueChange = { cmsOptions = it },
+                        label = { Text("CMS Options", fontSize = 11.sp) },
+                        placeholder = { Text("e.g. ASCII CRLF or RECFM F LRECL 80") },
+                        singleLine = true,
+                        keyboardOptions = TerminalKeyboardOptions.copy(imeAction = ImeAction.Done),
+                        modifier = Modifier.fillMaxWidth()
+                    )
                 }
             }
         },
@@ -497,8 +571,24 @@ fun FileTransferDialog(
                                 setRecfm(recfm)
                                 lreclStr.trim().toIntOrNull()?.let { setLrecl(it) }
                                 blksizeStr.trim().toIntOrNull()?.let { setBlksize(it) }
+                                if (spaceStr.isNotBlank()) setSpace(spaceStr.trim())
+                            }
+                            if (hostType == FTConfig.HostType.CMS && cmsOptions.isNotBlank()) {
+                                setOptions(cmsOptions.trim())
                             }
                         }
+                        lastTransferState = LastTransferState(
+                            hostFile = hostFile.trim(),
+                            localFile = resolvedLocal,
+                            isReceive = isReceive,
+                            isAscii = isAscii,
+                            hostType = hostType,
+                            recfm = recfm,
+                            lreclStr = lreclStr,
+                            blksizeStr = blksizeStr,
+                            spaceStr = spaceStr,
+                            cmsOptions = cmsOptions
+                        )
                         onStartTransfer(config)
                     }
                 },
diff --git a/src/main/java/haus/nightmare/a3270/ui/FunctionKeyBar.kt b/src/main/java/haus/nightmare/a3270/ui/FunctionKeyBar.kt
index 9cd9352..74c2467 100644
--- a/src/main/java/haus/nightmare/a3270/ui/FunctionKeyBar.kt
+++ b/src/main/java/haus/nightmare/a3270/ui/FunctionKeyBar.kt
@@ -15,6 +15,8 @@ import androidx.compose.ui.text.font.FontFamily
 import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
+import androidx.activity.compose.BackHandler
+import androidx.compose.ui.window.PopupProperties
 import haus.nightmare.lib3270j.ConnectionState
 import haus.nightmare.lib3270j.protocol.DS3270Constants.*
 
@@ -23,6 +25,11 @@ fun TwoRowKeyBar(
     connectionState: ConnectionState,
     isShiftPressed: Boolean = false,
     isLightPenMode: Boolean = false,
+    isInsertMode: Boolean = false,
+    isDocMode: Boolean = false,
+    isWordWrap: Boolean = false,
+    isAplMode: Boolean = false,
+    fourColorOverride: Boolean = false,
     hapticFeedbackEnabled: Boolean = true,
     onClearShift: () -> Unit = {},
     onConnectClick: () -> Unit,
@@ -34,6 +41,11 @@ fun TwoRowKeyBar(
     onScriptClick: () -> Unit = {},
     onPrinterSessionClick: () -> Unit = {},
     onToggleLightPen: () -> Unit = {},
+    onToggleInsert: () -> Unit = {},
+    onToggleDocMode: () -> Unit = {},
+    onToggleWordWrap: () -> Unit = {},
+    onToggleAplMode: () -> Unit = {},
+    onToggleFourColorOverride: () -> Unit = {},
     onSettingsClick: () -> Unit = {},
     onSendAid: (Int) -> Unit,
     onReset: () -> Unit,
@@ -51,6 +63,11 @@ fun TwoRowKeyBar(
     modifier: Modifier = Modifier
 ) {
     var menuExpanded by remember { mutableStateOf(false) }
+    var lastDismissTime by remember { mutableLongStateOf(0L) }
+
+    BackHandler(enabled = menuExpanded) {
+        menuExpanded = false
+    }
 
     Column(
         modifier = modifier
@@ -73,11 +90,22 @@ fun TwoRowKeyBar(
                     modifier = Modifier.fillMaxWidth(),
                     hapticFeedbackEnabled = hapticFeedbackEnabled,
                     innerPaddingHorizontal = 0.dp,
-                    onClick = { menuExpanded = true }
+                    onClick = {
+                        if (System.currentTimeMillis() - lastDismissTime > 200L) {
+                            menuExpanded = !menuExpanded
+                        }
+                    }
                 )
                 DropdownMenu(
                     expanded = menuExpanded,
-                    onDismissRequest = { menuExpanded = false },
+                    onDismissRequest = {
+                        menuExpanded = false
+                        lastDismissTime = System.currentTimeMillis()
+                    },
+                    properties = PopupProperties(
+                        focusable = false,
+                        dismissOnClickOutside = true
+                    ),
                     modifier = Modifier
                         .background(Color(0xFF2C2D30))
                         .heightIn(max = 420.dp)
@@ -178,6 +206,42 @@ fun TwoRowKeyBar(
                             }
                         )
                         HorizontalDivider(color = Color(0xFF3E4044))
+                        DropdownMenuItem(
+                            text = { Text("Insert Mode: ${if (isInsertMode) "ON" else "OFF"}", color = if (isInsertMode) Color(0xFF7890F0) else Color.White) },
+                            onClick = {
+                                menuExpanded = false
+                                onToggleInsert()
+                            }
+                        )
+                        DropdownMenuItem(
+                            text = { Text("Document Mode (DOC): ${if (isDocMode) "ON" else "OFF"}", color = if (isDocMode) Color(0xFF38D9A9) else Color.White) },
+                            onClick = {
+                                menuExpanded = false
+                                onToggleDocMode()
+                            }
+                        )
+                        DropdownMenuItem(
+                            text = { Text("Word Wrap: ${if (isWordWrap) "ON" else "OFF"}", color = if (isWordWrap) Color(0xFF38D9A9) else Color.White) },
+                            onClick = {
+                                menuExpanded = false
+                                onToggleWordWrap()
+                            }
+                        )
+                        DropdownMenuItem(
+                            text = { Text("APL Keyboard Mode: ${if (isAplMode) "ON" else "OFF"}", color = if (isAplMode) Color(0xFFFFA94D) else Color.White) },
+                            onClick = {
+                                menuExpanded = false
+                                onToggleAplMode()
+                            }
+                        )
+                        DropdownMenuItem(
+                            text = { Text("Base 4-Color Override: ${if (fourColorOverride) "ON" else "OFF"}", color = if (fourColorOverride) Color(0xFFFFD43B) else Color.White) },
+                            onClick = {
+                                menuExpanded = false
+                                onToggleFourColorOverride()
+                            }
+                        )
+                        HorizontalDivider(color = Color(0xFF3E4044))
                     }
                     DropdownMenuItem(
                         text = {
diff --git a/src/main/java/haus/nightmare/a3270/ui/OiaStatusBar.kt b/src/main/java/haus/nightmare/a3270/ui/OiaStatusBar.kt
index f15538f..f87d400 100644
--- a/src/main/java/haus/nightmare/a3270/ui/OiaStatusBar.kt
+++ b/src/main/java/haus/nightmare/a3270/ui/OiaStatusBar.kt
@@ -1,6 +1,7 @@
 package haus.nightmare.a3270.ui
 
 import androidx.compose.foundation.background
+import androidx.compose.foundation.clickable
 import androidx.compose.foundation.layout.*
 import androidx.compose.foundation.shape.RoundedCornerShape
 import androidx.compose.material3.Surface
@@ -27,15 +28,29 @@ fun OiaStatusBar(
     isTls: Boolean = false,
     isTlsVerified: Boolean = true,
     graphicsMode: String = "NONE",
-    codePage: String = "037",
     isLightPenMode: Boolean = false,
     isInsertMode: Boolean = false,
+    isDocMode: Boolean = false,
+    isWordWrap: Boolean = false,
+    isAplMode: Boolean = false,
+    onToggleInsert: (() -> Unit)? = null,
+    onToggleDocMode: (() -> Unit)? = null,
+    onToggleWordWrap: (() -> Unit)? = null,
+    onToggleAplMode: (() -> Unit)? = null,
     inhibitReason: Int = 0,
     luName: String = "",
     isNumericField: Boolean = false,
-    modelName: String = "",
+    uiTheme: String = "DARK",
     modifier: Modifier = Modifier
 ) {
+    val isLight = uiTheme.equals("LIGHT", ignoreCase = true)
+    val barBg = if (isLight) Color(0xFFE9ECEF) else Color(0xFF161719)
+    val defaultTextClr = if (isLight) Color(0xFF212529) else Color.White
+    val sysAvailClr = if (isLight) Color(0xFF005AC8) else Color(0xFF7890F0)
+    val inputInhibitedClr = if (isLight) Color(0xFF141414) else Color(0xFFFFFFFF)
+    val attentionClr = if (isLight) Color(0xFFB46400) else Color(0xFFFFFF00)
+    val commCheckClr = if (isLight) Color(0xFFBE1414) else Color(0xFFFF0000)
+
     val row = if (cols > 0 && rows > 0) ((cursorAddr / cols) % rows) + 1 else 1
     val col = if (cols > 0) (cursorAddr % cols) + 1 else 1
     val posStr = String.format("%03d/%03d [%04d]", row, col, cursorAddr)
@@ -66,24 +81,24 @@ fun OiaStatusBar(
             else -> "X LOCKED"
         }
         val clr = when (inhibitReason) {
-            haus.nightmare.lib3270j.ecl.ECLConstants.INHIBIT_COMM_CHECK -> Color(0xFFFF0000)
-            haus.nightmare.lib3270j.ecl.ECLConstants.INHIBIT_OPERATOR_DUE -> Color(0xFFFFFF00)
-            else -> Color(0xFFFFFFFF)
+            haus.nightmare.lib3270j.ecl.ECLConstants.INHIBIT_COMM_CHECK -> commCheckClr
+            haus.nightmare.lib3270j.ecl.ECLConstants.INHIBIT_OPERATOR_DUE -> attentionClr
+            haus.nightmare.lib3270j.ecl.ECLConstants.INHIBIT_NUMERIC_ONLY -> attentionClr
+            haus.nightmare.lib3270j.ecl.ECLConstants.INHIBIT_OVERFLOW -> attentionClr
+            else -> inputInhibitedClr
         }
         txt to clr
     } else if (isKeyboardLocked) {
-        "X SYSTEM" to Color(0xFFFFFFFF)
-    } else if (isInsertMode) {
-        "INSERT" to Color(0xFF7890F0)
+        "X SYSTEM" to inputInhibitedClr
     } else {
-        "READY" to Color(0xFF7890F0)
+        "READY" to sysAvailClr
     }
 
     Row(
         modifier = modifier
             .fillMaxWidth()
             .height(26.dp)
-            .background(Color(0xFF161719))
+            .background(barBg)
             .padding(horizontal = 8.dp),
         verticalAlignment = Alignment.CenterVertically,
         horizontalArrangement = Arrangement.SpaceBetween
@@ -101,7 +116,7 @@ fun OiaStatusBar(
             Spacer(modifier = Modifier.width(6.dp))
             Text(
                 text = hostText,
-                color = Color.White,
+                color = defaultTextClr,
                 fontSize = 11.sp,
                 fontFamily = FontFamily.Monospace,
                 fontWeight = FontWeight.Bold,
@@ -148,24 +163,6 @@ fun OiaStatusBar(
                 }
             }
 
-            // CodePage Badge
-            if (connectionState.isConnected() && codePage.isNotBlank()) {
-                Spacer(modifier = Modifier.width(6.dp))
-                Surface(
-                    color = Color(0xFFFA5252).copy(alpha = 0.2f),
-                    shape = RoundedCornerShape(4.dp)
-                ) {
-                    Text(
-                        text = "CP$codePage",
-                        color = Color(0xFFFF8787),
-                        fontSize = 9.sp,
-                        fontFamily = FontFamily.Monospace,
-                        fontWeight = FontWeight.Bold,
-                        modifier = Modifier.padding(horizontal = 4.dp, vertical = 1.dp)
-                    )
-                }
-            }
-
             // Field Status: NUM vs ALPHA
             if (connectionState.isConnected() && rows > 0 && cols > 0) {
                 Spacer(modifier = Modifier.width(6.dp))
@@ -184,24 +181,6 @@ fun OiaStatusBar(
                 }
             }
 
-            // Model / Dimensions Badge
-            if (connectionState.isConnected() && rows > 0 && cols > 0) {
-                Spacer(modifier = Modifier.width(6.dp))
-                Surface(
-                    color = Color(0xFF495057).copy(alpha = 0.3f),
-                    shape = RoundedCornerShape(4.dp)
-                ) {
-                    Text(
-                        text = if (modelName.isNotBlank()) modelName else "${rows}x${cols}",
-                        color = Color(0xFFCED4DA),
-                        fontSize = 9.sp,
-                        fontFamily = FontFamily.Monospace,
-                        fontWeight = FontWeight.Bold,
-                        modifier = Modifier.padding(horizontal = 4.dp, vertical = 1.dp)
-                    )
-                }
-            }
-
             // Light Pen Badge
             if (isLightPenMode) {
                 Spacer(modifier = Modifier.width(6.dp))
@@ -257,6 +236,78 @@ fun OiaStatusBar(
             }
         }
 
+        // Operational Mode Badges (^ INS, APL, DOC, V)
+        Row(
+            verticalAlignment = Alignment.CenterVertically,
+            horizontalArrangement = Arrangement.spacedBy(4.dp),
+            modifier = Modifier.padding(horizontal = 2.dp)
+        ) {
+            if (connectionState.isConnected() && isInsertMode) {
+                Surface(
+                    color = Color(0xFF7890F0).copy(alpha = 0.2f),
+                    shape = RoundedCornerShape(4.dp),
+                    modifier = Modifier.then(if (onToggleInsert != null) Modifier.clickable { onToggleInsert() } else Modifier)
+                ) {
+                    Text(
+                        text = "^ INS",
+                        color = Color(0xFF7890F0),
+                        fontSize = 10.sp,
+                        fontFamily = FontFamily.Monospace,
+                        fontWeight = FontWeight.Bold,
+                        modifier = Modifier.padding(horizontal = 4.dp, vertical = 2.dp)
+                    )
+                }
+            }
+            if (connectionState.isConnected() && isAplMode) {
+                Surface(
+                    color = Color(0xFFFF922B).copy(alpha = 0.2f),
+                    shape = RoundedCornerShape(4.dp),
+                    modifier = Modifier.then(if (onToggleAplMode != null) Modifier.clickable { onToggleAplMode() } else Modifier)
+                ) {
+                    Text(
+                        text = "APL",
+                        color = Color(0xFFFFA94D),
+                        fontSize = 10.sp,
+                        fontFamily = FontFamily.Monospace,
+                        fontWeight = FontWeight.Bold,
+                        modifier = Modifier.padding(horizontal = 4.dp, vertical = 2.dp)
+                    )
+                }
+            }
+            if (connectionState.isConnected() && isDocMode) {
+                Surface(
+                    color = Color(0xFF20C997).copy(alpha = 0.2f),
+                    shape = RoundedCornerShape(4.dp),
+                    modifier = Modifier.then(if (onToggleDocMode != null) Modifier.clickable { onToggleDocMode() } else Modifier)
+                ) {
+                    Text(
+                        text = "DOC",
+                        color = Color(0xFF38D9A9),
+                        fontSize = 10.sp,
+                        fontFamily = FontFamily.Monospace,
+                        fontWeight = FontWeight.Bold,
+                        modifier = Modifier.padding(horizontal = 4.dp, vertical = 2.dp)
+                    )
+                }
+            }
+            if (connectionState.isConnected() && isWordWrap) {
+                Surface(
+                    color = Color(0xFF20C997).copy(alpha = 0.2f),
+                    shape = RoundedCornerShape(4.dp),
+                    modifier = Modifier.then(if (onToggleWordWrap != null) Modifier.clickable { onToggleWordWrap() } else Modifier)
+                ) {
+                    Text(
+                        text = "V",
+                        color = Color(0xFF38D9A9),
+                        fontSize = 10.sp,
+                        fontFamily = FontFamily.Monospace,
+                        fontWeight = FontWeight.Bold,
+                        modifier = Modifier.padding(horizontal = 4.dp, vertical = 2.dp)
+                    )
+                }
+            }
+        }
+
         // Terminal Keyboard Lock Status Badge (X SYSTEM vs READY)
         Surface(
             color = lockStatusColor.copy(alpha = 0.2f),
@@ -276,7 +327,7 @@ fun OiaStatusBar(
         // Cursor Position & Buffer Address
         Text(
             text = posStr,
-            color = Color(0xFF22B8CF),
+            color = if (isLight) Color(0xFF0C8599) else Color(0xFF22B8CF),
             fontSize = 10.sp,
             fontFamily = FontFamily.Monospace,
             fontWeight = FontWeight.Bold
diff --git a/src/main/java/haus/nightmare/a3270/ui/SettingsDialog.kt b/src/main/java/haus/nightmare/a3270/ui/SettingsDialog.kt
index cfc2b3c..7e9bec2 100644
--- a/src/main/java/haus/nightmare/a3270/ui/SettingsDialog.kt
+++ b/src/main/java/haus/nightmare/a3270/ui/SettingsDialog.kt
@@ -33,6 +33,17 @@ fun SettingsDialog(
     initialStartupBehavior: String = "SHOW_CONNECT",
     initialDynamicRows: Int = 62,
     initialDynamicCols: Int = 160,
+    initialEntryAssistDocMode: Boolean = false,
+    initialEntryAssistWordWrap: Boolean = false,
+    initialEntryAssistStartCol: Int = 1,
+    initialEntryAssistEndCol: Int = 80,
+    initialEntryAssistBell: Boolean = false,
+    initialEntryAssistBellCol: Int = 75,
+    initialEntryAssistTabStops: String = "5,10,15,20,25,30,35,40,45,50,55,60,65,70,75",
+    initialInsertOffOnAid: Boolean = true,
+    initialFourColorOverride: Boolean = false,
+    initialNumericFieldLock: Boolean = true,
+    initialAutoSkipEnabled: Boolean = true,
     onDismiss: () -> Unit,
     onSave: (
         maskHiddenInput: Boolean,
@@ -47,7 +58,18 @@ fun SettingsDialog(
         blockSelectMode: Boolean,
         startupBehavior: String,
         dynamicRows: Int,
-        dynamicCols: Int
+        dynamicCols: Int,
+        entryAssistDocMode: Boolean,
+        entryAssistWordWrap: Boolean,
+        entryAssistStartCol: Int,
+        entryAssistEndCol: Int,
+        entryAssistBell: Boolean,
+        entryAssistBellCol: Int,
+        entryAssistTabStops: String,
+        insertOffOnAid: Boolean,
+        fourColorOverride: Boolean,
+        numericFieldLock: Boolean,
+        autoSkipEnabled: Boolean
     ) -> Unit
 ) {
     val context = androidx.compose.ui.platform.LocalContext.current
@@ -68,6 +90,18 @@ fun SettingsDialog(
     var dynamicRowsStr by remember { mutableStateOf(initialDynamicRows.toString()) }
     var dynamicColsStr by remember { mutableStateOf(initialDynamicCols.toString()) }
 
+    var entryAssistDocMode by remember { mutableStateOf(initialEntryAssistDocMode) }
+    var entryAssistWordWrap by remember { mutableStateOf(initialEntryAssistWordWrap) }
+    var entryAssistStartColStr by remember { mutableStateOf(initialEntryAssistStartCol.toString()) }
+    var entryAssistEndColStr by remember { mutableStateOf(initialEntryAssistEndCol.toString()) }
+    var entryAssistBell by remember { mutableStateOf(initialEntryAssistBell) }
+    var entryAssistBellColStr by remember { mutableStateOf(initialEntryAssistBellCol.toString()) }
+    var entryAssistTabStops by remember { mutableStateOf(initialEntryAssistTabStops) }
+    var insertOffOnAid by remember { mutableStateOf(initialInsertOffOnAid) }
+    var fourColorOverride by remember { mutableStateOf(initialFourColorOverride) }
+    var numericFieldLock by remember { mutableStateOf(initialNumericFieldLock) }
+    var autoSkipEnabled by remember { mutableStateOf(initialAutoSkipEnabled) }
+
     var showImportDialog by remember { mutableStateOf(false) }
 
     Dialog(
@@ -416,7 +450,207 @@ fun SettingsDialog(
                 HorizontalDivider(color = Color(0xFF2C2D30))
                 Spacer(modifier = Modifier.height(16.dp))
 
-                // SECTION 4: INI CONFIGURATION BACKUP
+                // SECTION 4: ENTRY ASSIST & MODES
+                Text("Entry Assist & Modes", fontSize = 13.sp, fontWeight = FontWeight.Bold, color = Color(0xFF339AF0))
+                Text("Document Mode word wrap, margins, audible bell, and operational locks matching j3270.", fontSize = 12.sp, color = Color.LightGray)
+                Spacer(modifier = Modifier.height(8.dp))
+
+                // Document Mode
+                Row(
+                    modifier = Modifier.fillMaxWidth(),
+                    verticalAlignment = Alignment.CenterVertically,
+                    horizontalArrangement = Arrangement.SpaceBetween
+                ) {
+                    Column(modifier = Modifier.weight(1f).padding(end = 12.dp)) {
+                        Text("Document Mode (DOC)", fontSize = 14.sp, fontWeight = FontWeight.SemiBold, color = Color.White)
+                        Text("Enable word wrapping and margin tracking during text entry.", fontSize = 12.sp, color = Color.LightGray)
+                    }
+                    Switch(
+                        checked = entryAssistDocMode,
+                        onCheckedChange = { entryAssistDocMode = it },
+                        colors = SwitchDefaults.colors(checkedThumbColor = Color.White, checkedTrackColor = Color(0xFF2B8A3E))
+                    )
+                }
+
+                Spacer(modifier = Modifier.height(10.dp))
+
+                // Word Wrap
+                Row(
+                    modifier = Modifier.fillMaxWidth(),
+                    verticalAlignment = Alignment.CenterVertically,
+                    horizontalArrangement = Arrangement.SpaceBetween
+                ) {
+                    Column(modifier = Modifier.weight(1f).padding(end = 12.dp)) {
+                        Text("Word Wrap (V)", fontSize = 14.sp, fontWeight = FontWeight.SemiBold, color = Color.White)
+                        Text("Automatically wrap partial words at the right margin.", fontSize = 12.sp, color = Color.LightGray)
+                    }
+                    Switch(
+                        checked = entryAssistWordWrap,
+                        onCheckedChange = { entryAssistWordWrap = it },
+                        colors = SwitchDefaults.colors(checkedThumbColor = Color.White, checkedTrackColor = Color(0xFF2B8A3E))
+                    )
+                }
+
+                Spacer(modifier = Modifier.height(10.dp))
+
+                // Margins (Left / Right)
+                Column(modifier = Modifier.fillMaxWidth()) {
+                    Text("Entry Assist Margins", fontSize = 14.sp, fontWeight = FontWeight.SemiBold, color = Color.White)
+                    Text("Left margin (1-80) and Right margin (1-80).", fontSize = 12.sp, color = Color.LightGray)
+                    Spacer(modifier = Modifier.height(6.dp))
+                    Row(
+                        modifier = Modifier.fillMaxWidth(),
+                        horizontalArrangement = Arrangement.spacedBy(8.dp)
+                    ) {
+                        OutlinedTextField(
+                            value = entryAssistStartColStr,
+                            onValueChange = { entryAssistStartColStr = it },
+                            label = { Text("Left Col (1-80)") },
+                            singleLine = true,
+                            modifier = Modifier.weight(1f),
+                            keyboardOptions = androidx.compose.foundation.text.KeyboardOptions(
+                                keyboardType = androidx.compose.ui.text.input.KeyboardType.Number
+                            )
+                        )
+                        OutlinedTextField(
+                            value = entryAssistEndColStr,
+                            onValueChange = { entryAssistEndColStr = it },
+                            label = { Text("Right Col (1-80)") },
+                            singleLine = true,
+                            modifier = Modifier.weight(1f),
+                            keyboardOptions = androidx.compose.foundation.text.KeyboardOptions(
+                                keyboardType = androidx.compose.ui.text.input.KeyboardType.Number
+                            )
+                        )
+                    }
+                }
+
+                Spacer(modifier = Modifier.height(10.dp))
+
+                // Audible EOL Bell
+                Row(
+                    modifier = Modifier.fillMaxWidth(),
+                    verticalAlignment = Alignment.CenterVertically,
+                    horizontalArrangement = Arrangement.SpaceBetween
+                ) {
+                    Column(modifier = Modifier.weight(1f).padding(end = 12.dp)) {
+                        Text("Audible EOL Bell Warning", fontSize = 14.sp, fontWeight = FontWeight.SemiBold, color = Color.White)
+                        Text("Beep warning signal when typing reaches the bell column.", fontSize = 12.sp, color = Color.LightGray)
+                    }
+                    Switch(
+                        checked = entryAssistBell,
+                        onCheckedChange = { entryAssistBell = it },
+                        colors = SwitchDefaults.colors(checkedThumbColor = Color.White, checkedTrackColor = Color(0xFF2B8A3E))
+                    )
+                }
+
+                Spacer(modifier = Modifier.height(6.dp))
+
+                OutlinedTextField(
+                    value = entryAssistBellColStr,
+                    onValueChange = { entryAssistBellColStr = it },
+                    label = { Text("Bell Column (1-80)") },
+                    singleLine = true,
+                    modifier = Modifier.fillMaxWidth(),
+                    keyboardOptions = androidx.compose.foundation.text.KeyboardOptions(
+                        keyboardType = androidx.compose.ui.text.input.KeyboardType.Number
+                    )
+                )
+
+                Spacer(modifier = Modifier.height(10.dp))
+
+                // Tab Stops
+                OutlinedTextField(
+                    value = entryAssistTabStops,
+                    onValueChange = { entryAssistTabStops = it },
+                    label = { Text("Word Tab Stops") },
+                    placeholder = { Text("5,10,15,20,25,30,35,40,45,50,55,60,65,70,75") },
+                    singleLine = true,
+                    modifier = Modifier.fillMaxWidth()
+                )
+
+                Spacer(modifier = Modifier.height(10.dp))
+
+                // Operational Mode Toggles
+                // 1. Reset Insert on AID
+                Row(
+                    modifier = Modifier.fillMaxWidth(),
+                    verticalAlignment = Alignment.CenterVertically,
+                    horizontalArrangement = Arrangement.SpaceBetween
+                ) {
+                    Column(modifier = Modifier.weight(1f).padding(end = 12.dp)) {
+                        Text("Reset Insert Mode on AID Key", fontSize = 14.sp, fontWeight = FontWeight.SemiBold, color = Color.White)
+                        Text("Automatically cancel insert mode upon Enter, PF, PA, or Clear.", fontSize = 12.sp, color = Color.LightGray)
+                    }
+                    Switch(
+                        checked = insertOffOnAid,
+                        onCheckedChange = { insertOffOnAid = it },
+                        colors = SwitchDefaults.colors(checkedThumbColor = Color.White, checkedTrackColor = Color(0xFF2B8A3E))
+                    )
+                }
+
+                Spacer(modifier = Modifier.height(10.dp))
+
+                // 2. Base 4-Color Override
+                Row(
+                    modifier = Modifier.fillMaxWidth(),
+                    verticalAlignment = Alignment.CenterVertically,
+                    horizontalArrangement = Arrangement.SpaceBetween
+                ) {
+                    Column(modifier = Modifier.weight(1f).padding(end = 12.dp)) {
+                        Text("Base 4-Color Override Mode", fontSize = 14.sp, fontWeight = FontWeight.SemiBold, color = Color.White)
+                        Text("Force 3279 4-color mapping (green/white/red/turquoise), ignoring host extended colors.", fontSize = 12.sp, color = Color.LightGray)
+                    }
+                    Switch(
+                        checked = fourColorOverride,
+                        onCheckedChange = { fourColorOverride = it },
+                        colors = SwitchDefaults.colors(checkedThumbColor = Color.White, checkedTrackColor = Color(0xFF2B8A3E))
+                    )
+                }
+
+                Spacer(modifier = Modifier.height(10.dp))
+
+                // 3. Numeric Field Lock
+                Row(
+                    modifier = Modifier.fillMaxWidth(),
+                    verticalAlignment = Alignment.CenterVertically,
+                    horizontalArrangement = Arrangement.SpaceBetween
+                ) {
+                    Column(modifier = Modifier.weight(1f).padding(end = 12.dp)) {
+                        Text("Numeric Field Lock (-NUMERIC)", fontSize = 14.sp, fontWeight = FontWeight.SemiBold, color = Color.White)
+                        Text("Inhibit keyboard if a non-numeric character is typed in a numeric-only field.", fontSize = 12.sp, color = Color.LightGray)
+                    }
+                    Switch(
+                        checked = numericFieldLock,
+                        onCheckedChange = { numericFieldLock = it },
+                        colors = SwitchDefaults.colors(checkedThumbColor = Color.White, checkedTrackColor = Color(0xFF2B8A3E))
+                    )
+                }
+
+                Spacer(modifier = Modifier.height(10.dp))
+
+                // 4. Auto-Skip
+                Row(
+                    modifier = Modifier.fillMaxWidth(),
+                    verticalAlignment = Alignment.CenterVertically,
+                    horizontalArrangement = Arrangement.SpaceBetween
+                ) {
+                    Column(modifier = Modifier.weight(1f).padding(end = 12.dp)) {
+                        Text("Auto-Skip Across Fields", fontSize = 14.sp, fontWeight = FontWeight.SemiBold, color = Color.White)
+                        Text("Automatically advance cursor to next unprotected field when field is filled.", fontSize = 12.sp, color = Color.LightGray)
+                    }
+                    Switch(
+                        checked = autoSkipEnabled,
+                        onCheckedChange = { autoSkipEnabled = it },
+                        colors = SwitchDefaults.colors(checkedThumbColor = Color.White, checkedTrackColor = Color(0xFF2B8A3E))
+                    )
+                }
+
+                Spacer(modifier = Modifier.height(16.dp))
+                HorizontalDivider(color = Color(0xFF2C2D30))
+                Spacer(modifier = Modifier.height(16.dp))
+
+                // SECTION 5: INI CONFIGURATION BACKUP
                 Text("Configuration File (INI)", fontSize = 13.sp, fontWeight = FontWeight.Bold, color = Color(0xFF339AF0))
                 Text("Compatible with j3270 desktop INI configuration files.", fontSize = 12.sp, color = Color.LightGray)
                 Spacer(modifier = Modifier.height(8.dp))
@@ -459,6 +693,9 @@ fun SettingsDialog(
                         onClick = {
                             val dRows = dynamicRowsStr.trim().toIntOrNull()?.coerceIn(24, 255) ?: 62
                             val dCols = dynamicColsStr.trim().toIntOrNull()?.coerceIn(80, 255) ?: 160
+                            val eaStartCol = entryAssistStartColStr.trim().toIntOrNull()?.coerceIn(1, 80) ?: 1
+                            val eaEndCol = entryAssistEndColStr.trim().toIntOrNull()?.coerceIn(1, 80) ?: 80
+                            val eaBellCol = entryAssistBellColStr.trim().toIntOrNull()?.coerceIn(1, 80) ?: 75
                             onSave(
                                 maskHiddenInput,
                                 cursorBlink,
@@ -472,7 +709,18 @@ fun SettingsDialog(
                                 blockSelectMode,
                                 startupBehavior,
                                 dRows,
-                                dCols
+                                dCols,
+                                entryAssistDocMode,
+                                entryAssistWordWrap,
+                                eaStartCol,
+                                eaEndCol,
+                                entryAssistBell,
+                                eaBellCol,
+                                entryAssistTabStops,
+                                insertOffOnAid,
+                                fourColorOverride,
+                                numericFieldLock,
+                                autoSkipEnabled
                             )
                         },
                         colors = ButtonDefaults.buttonColors(containerColor = Color(0xFF2B8A3E))
@@ -517,6 +765,17 @@ fun SettingsDialog(
                             dynamicColsStr = haus.nightmare.a3270.storage.AppSettings.getDynamicCols(context).toString()
                             defaultCodePage = haus.nightmare.a3270.storage.AppSettings.getDefaultCodePage(context)
                             defaultGraphicsMode = haus.nightmare.a3270.storage.AppSettings.getDefaultGraphicsMode(context)
+                            entryAssistDocMode = haus.nightmare.a3270.storage.AppSettings.getEntryAssistDocMode(context)
+                            entryAssistWordWrap = haus.nightmare.a3270.storage.AppSettings.getEntryAssistWordWrap(context)
+                            entryAssistStartColStr = haus.nightmare.a3270.storage.AppSettings.getEntryAssistStartCol(context).toString()
+                            entryAssistEndColStr = haus.nightmare.a3270.storage.AppSettings.getEntryAssistEndCol(context).toString()
+                            entryAssistBell = haus.nightmare.a3270.storage.AppSettings.getEntryAssistBell(context)
+                            entryAssistBellColStr = haus.nightmare.a3270.storage.AppSettings.getEntryAssistBellCol(context).toString()
+                            entryAssistTabStops = haus.nightmare.a3270.storage.AppSettings.getEntryAssistTabStops(context)
+                            insertOffOnAid = haus.nightmare.a3270.storage.AppSettings.getInsertOffOnAid(context)
+                            fourColorOverride = haus.nightmare.a3270.storage.AppSettings.getFourColorOverride(context)
+                            numericFieldLock = haus.nightmare.a3270.storage.AppSettings.getNumericFieldLock(context)
+                            autoSkipEnabled = haus.nightmare.a3270.storage.AppSettings.getAutoSkipEnabled(context)
                             android.widget.Toast.makeText(context, "Settings imported from INI", android.widget.Toast.LENGTH_SHORT).show()
                         } catch (e: Exception) {
                             android.widget.Toast.makeText(context, "Error importing: ${e.message}", android.widget.Toast.LENGTH_LONG).show()
diff --git a/src/main/java/haus/nightmare/a3270/ui/TerminalInputView.kt b/src/main/java/haus/nightmare/a3270/ui/TerminalInputView.kt
index ee95b6b..37f42a8 100644
--- a/src/main/java/haus/nightmare/a3270/ui/TerminalInputView.kt
+++ b/src/main/java/haus/nightmare/a3270/ui/TerminalInputView.kt
@@ -111,4 +111,10 @@ class TerminalInputView(context: Context) : View(context) {
         val imm = context.getSystemService(Context.INPUT_METHOD_SERVICE) as? InputMethodManager
         imm?.showSoftInput(this, InputMethodManager.SHOW_IMPLICIT)
     }
+
+    fun hideSoftKeyboard() {
+        clearFocus()
+        val imm = context.getSystemService(Context.INPUT_METHOD_SERVICE) as? InputMethodManager
+        imm?.hideSoftInputFromWindow(windowToken, 0)
+    }
 }
diff --git a/src/main/java/haus/nightmare/a3270/ui/TerminalView.kt b/src/main/java/haus/nightmare/a3270/ui/TerminalView.kt
index f0b635b..2ecde7a 100644
--- a/src/main/java/haus/nightmare/a3270/ui/TerminalView.kt
+++ b/src/main/java/haus/nightmare/a3270/ui/TerminalView.kt
@@ -70,6 +70,7 @@ fun TerminalView(
     cursorStyle: String = "BLOCK",
     isInsertMode: Boolean = false,
     blockSelectMode: Boolean = false,
+    fourColorOverride: Boolean = false,
     searchHighlightAddr: Int = -1,
     searchHighlightLen: Int = 0,
     onTapAddress: (Int) -> Unit,
@@ -256,19 +257,17 @@ fun TerminalView(
             if (graphicsPlane != null && graphicsPlane.hasContent()) {
                 val gridW = metrics.gridWidth.toInt()
                 val gridH = metrics.gridHeight.toInt()
-                if (gridW > 0 && gridH > 0) {
-                    val gWidth = graphicsPlane.canvasWidth
-                    val gHeight = graphicsPlane.canvasHeight
-                    val rgb = graphicsPlane.rgbBuffer
-                    if (rgb != null && gWidth > 0 && gHeight > 0) {
-                        val bmp = android.graphics.Bitmap.createBitmap(rgb, gWidth, gHeight, android.graphics.Bitmap.Config.ARGB_8888)
-                        drawContext.canvas.nativeCanvas.drawBitmap(
-                            bmp,
-                            null,
-                            android.graphics.RectF(offsetX, offsetY, offsetX + gridW.toFloat(), offsetY + gridH.toFloat()),
-                            null
-                        )
-                    }
+                val gWidth = graphicsPlane.canvasWidth
+                val gHeight = graphicsPlane.canvasHeight
+                val rgb = graphicsPlane.rgbBuffer
+                if (gridW > 0 && gridH > 0 && rgb != null && gWidth > 0 && gHeight > 0) {
+                    val bmp = android.graphics.Bitmap.createBitmap(rgb, gWidth, gHeight, android.graphics.Bitmap.Config.ARGB_8888)
+                    drawContext.canvas.nativeCanvas.drawBitmap(
+                        bmp,
+                        null,
+                        android.graphics.RectF(offsetX, offsetY, offsetX + gridW.toFloat(), offsetY + gridH.toFloat()),
+                        null
+                    )
                 }
             }
 
@@ -321,7 +320,7 @@ fun TerminalView(
                         }
 
                         // Compute 3270 color and field intensity
-                        fgColor = getFgColorForAttribute(ea, currentFieldEa, currentFA)
+                        fgColor = getFgColorForAttribute(ea, currentFieldEa, currentFA, fourColorOverride)
                         bgColor = getBgColorForAttribute(ea, currentFieldEa)
 
                         csVal = if (ea.cs != 0.toByte()) (ea.cs.toInt() and 0xFF)
@@ -729,13 +728,20 @@ private fun copySelection(
     }
 }
 
-internal fun getFgColorForAttribute(ea: ExtendedAttribute, currentFieldEa: ExtendedAttribute?, currentFA: Byte): Color {
-    val fg = if (ea.fg != 0.toByte()) (ea.fg.toInt() and 0xFF)
-             else if (currentFieldEa != null && currentFieldEa.fg != 0.toByte()) (currentFieldEa.fg.toInt() and 0xFF)
-             else 0
+internal fun getFgColorForAttribute(
+    ea: ExtendedAttribute,
+    currentFieldEa: ExtendedAttribute?,
+    currentFA: Byte,
+    fourColorOverride: Boolean = false
+): Color {
+    if (!fourColorOverride) {
+        val fg = if (ea.fg != 0.toByte()) (ea.fg.toInt() and 0xFF)
+                 else if (currentFieldEa != null && currentFieldEa.fg != 0.toByte()) (currentFieldEa.fg.toInt() and 0xFF)
+                 else 0
 
-    if (fg in 0xf0..0xff) {
-        return HOST_COLORS[fg - 0xf0]
+        if (fg in 0xf0..0xff) {
+            return HOST_COLORS[fg - 0xf0]
+        }
     }
     val fa = currentFA.toInt() and 0xFF
     return if (faIsProtected(fa)) {
diff --git a/src/test/java/haus/nightmare/a3270/EntryAssistAndModesTest.kt b/src/test/java/haus/nightmare/a3270/EntryAssistAndModesTest.kt
new file mode 100644
index 0000000..ab171eb
--- /dev/null
+++ b/src/test/java/haus/nightmare/a3270/EntryAssistAndModesTest.kt
@@ -0,0 +1,255 @@
+package haus.nightmare.a3270
+
+import haus.nightmare.lib3270j.TerminalModel
+import haus.nightmare.lib3270j.charset.EbcdicTranslator
+import haus.nightmare.lib3270j.ecl.ECLConstants
+import haus.nightmare.lib3270j.ecl.ECLOIA
+import haus.nightmare.lib3270j.input.InputProcessor
+import haus.nightmare.lib3270j.protocol.DS3270Constants.*
+import haus.nightmare.lib3270j.screen.ScreenBuffer
+import org.junit.Assert.*
+import org.junit.Test
+import java.util.concurrent.atomic.AtomicInteger
+
+class EntryAssistAndModesTest {
+
+    @Test
+    fun testEntryAssistDocModeAndWordWrap() {
+        val translator = EbcdicTranslator()
+        val screen = ScreenBuffer(TerminalModel.IBM_3279_2, translator)
+        val inputProcessor = InputProcessor(screen, translator, null)
+        val oia = ECLOIA(screen, inputProcessor, null)
+        inputProcessor.setOIA(oia)
+
+        screen.isEntryAssistDOCmode = true
+        screen.isEntryAssistWordWrap = true
+        screen.setLeftMargin(0)
+        screen.setRightMargin(20)
+
+        assertTrue(screen.isEntryAssistDOCmode)
+        assertTrue(screen.isEntryAssistWordWrap)
+        assertEquals(0, screen.entryAssistStartColumn)
+        assertEquals(20, screen.entryAssistEndColumn)
+
+        // Type at col 18 with word crossing col 20
+        screen.setCursorPosition(0, 18)
+        inputProcessor.typeCharacter('T')
+        inputProcessor.typeCharacter('E')
+        inputProcessor.typeCharacter('S')
+        inputProcessor.typeCharacter('T')
+
+        // Word wrap moves partial word to next row starting at left margin
+        assertEquals(1, screen.cursorRow)
+        assertTrue(screen.cursorCol >= 0)
+    }
+
+    @Test
+    fun testDocModeTabStops() {
+        val translator = EbcdicTranslator()
+        val screen = ScreenBuffer(TerminalModel.IBM_3279_2, translator)
+        screen.isEntryAssistDOCmode = true
+        screen.setLeftMargin(0)
+        screen.setRightMargin(79)
+        screen.setWordTabPositions(intArrayOf(10, 20, 30))
+
+        screen.setCursorPosition(0, 0)
+        screen.processWordTab(true)
+        assertEquals(10, screen.cursorCol)
+
+        screen.processWordTab(true)
+        assertEquals(20, screen.cursorCol)
+
+        screen.processWordTab(false)
+        assertEquals(10, screen.cursorCol)
+    }
+
+    @Test
+    fun testAplModeAndGraphicEscape() {
+        val translator = EbcdicTranslator()
+        val screen = ScreenBuffer(TerminalModel.IBM_3279_2, translator)
+        val inputProcessor = InputProcessor(screen, translator, null)
+        val oia = ECLOIA(screen, inputProcessor, null)
+        inputProcessor.setOIA(oia)
+
+        assertFalse(inputProcessor.isAplKeyboardMode)
+        inputProcessor.isAplKeyboardMode = true
+        assertTrue(inputProcessor.isAplKeyboardMode)
+        assertTrue(oia.isApl)
+
+        // Type 'a' in APL mode -> stores CS_GE Graphic Escape charset
+        screen.setCursorPosition(0, 0)
+        inputProcessor.typeCharacter('a')
+
+        val cell = screen.getCell(0)
+        assertEquals(CS_GE.toInt(), cell.cs.toInt())
+
+        // Toggle APL mode off
+        inputProcessor.toggleAplKeyboardMode()
+        assertFalse(inputProcessor.isAplKeyboardMode)
+        assertFalse(oia.isApl)
+    }
+
+    @Test
+    fun testAudibleBellCallback() {
+        val translator = EbcdicTranslator()
+        val screen = ScreenBuffer(TerminalModel.IBM_3279_2, translator)
+        val inputProcessor = InputProcessor(screen, translator, null)
+
+        val bellCount = AtomicInteger(0)
+        inputProcessor.setBellListener { bellCount.incrementAndGet() }
+        inputProcessor.isBellEnabled = true
+        inputProcessor.bellColumn = 74
+
+        screen.setCursorPosition(0, 70)
+        inputProcessor.typeCharacter('A')
+        inputProcessor.typeCharacter('B')
+        inputProcessor.typeCharacter('C')
+        assertEquals(0, bellCount.get())
+
+        inputProcessor.typeCharacter('D') // Col 74 -> Bell fires
+        assertEquals(1, bellCount.get())
+
+        inputProcessor.typeCharacter('E') // Same line -> No re-fire
+        assertEquals(1, bellCount.get())
+    }
+
+    @Test
+    fun testInsertModeResetOnAid() {
+        val translator = EbcdicTranslator()
+        val screen = ScreenBuffer(TerminalModel.IBM_3279_2, translator)
+        val inputProcessor = InputProcessor(screen, translator, null)
+
+        inputProcessor.isInsertOffOnAid = true
+        inputProcessor.isInsertMode = true
+        assertTrue(inputProcessor.isInsertMode)
+
+        inputProcessor.sendAid(AID_ENTER)
+        assertFalse(inputProcessor.isInsertMode)
+
+        // Disabled
+        inputProcessor.isInsertOffOnAid = false
+        inputProcessor.isInsertMode = true
+        inputProcessor.sendAid(AID_ENTER)
+        assertTrue(inputProcessor.isInsertMode)
+    }
+
+    @Test
+    fun testNumericFieldLock() {
+        val translator = EbcdicTranslator()
+        val screen = ScreenBuffer(TerminalModel.IBM_3279_2, translator)
+        val inputProcessor = InputProcessor(screen, translator, null)
+        val oia = ECLOIA(screen, inputProcessor, null)
+        inputProcessor.setOIA(oia)
+
+        screen.setFieldAttribute(0, FA_NUMERIC.toByte())
+        screen.setFieldAttribute(6, FA_PROTECT.toByte())
+        screen.cursorAddress = 1
+
+        inputProcessor.isNumericFieldLock = true
+        inputProcessor.typeCharacter('Z') // Non-numeric
+        assertTrue(inputProcessor.isKeyboardLocked)
+        assertEquals(ECLConstants.INHIBIT_NUMERIC_ONLY, oia.inputInhibited)
+
+        inputProcessor.reset()
+        assertFalse(inputProcessor.isKeyboardLocked)
+
+        // With numeric lock disabled
+        inputProcessor.isNumericFieldLock = false
+        screen.cursorAddress = 1
+        inputProcessor.typeCharacter('Z')
+        assertFalse(inputProcessor.isKeyboardLocked)
+    }
+
+    @Test
+    fun testBase4ColorParity() {
+        // In 3279 Base 4-Color Mode:
+        // Intensified Protected -> White (0xFFFFFF)
+        // Normal Protected -> Turquoise / Cyan (0x00FFFF)
+        // Intensified Unprotected -> Red (0xFF0000)
+        // Normal Unprotected -> Green (0x00FF00)
+        val faNormProt = FA_PROTECT
+        val faHighProt = FA_PROTECT or FA_INT_HIGH_SEL
+        val faNormUnprot = 0
+        val faHighUnprot = FA_INT_HIGH_SEL
+
+        fun getBase4Color(fa: Int): Int {
+            val isProt = (fa and FA_PROTECT) != 0
+            val isHigh = (fa and FA_INT_HIGH_SEL) != 0
+            return if (isProt) {
+                if (isHigh) 0xFFFFFF else 0x00FFFF
+            } else {
+                if (isHigh) 0xFF0000 else 0x00FF00
+            }
+        }
+
+        assertEquals(0xFFFFFF, getBase4Color(faHighProt))
+        assertEquals(0x00FFFF, getBase4Color(faNormProt))
+        assertEquals(0xFF0000, getBase4Color(faHighUnprot))
+        assertEquals(0x00FF00, getBase4Color(faNormUnprot))
+    }
+
+    @Test
+    fun testIniSectionSyntaxMatchingJ3270() {
+        val sampleIni = """
+            [entryassist]
+            docMode = true
+            wordWrap = true
+            startCol = 5
+            endCol = 75
+            bell = true
+            bellCol = 70
+            tabStops = 5,10,15,20
+
+            [modes]
+            resetInsertOnAid = true
+            fourColorOverride = true
+            numericLock = false
+            autoSkip = true
+        """.trimIndent()
+
+        val lines = sampleIni.lines()
+        var currentSection = ""
+        val parsed = mutableMapOf<String, String>()
+
+        for (line in lines) {
+            val trimmed = line.trim()
+            if (trimmed.startsWith("[") && trimmed.endsWith("]")) {
+                currentSection = trimmed.substring(1, trimmed.length - 1).lowercase()
+            } else if (trimmed.contains("=")) {
+                val parts = trimmed.split("=", limit = 2)
+                val key = parts[0].trim().lowercase()
+                val value = parts[1].trim()
+                parsed["$currentSection.$key"] = value
+            }
+        }
+
+        assertEquals("true", parsed["entryassist.docmode"])
+        assertEquals("true", parsed["entryassist.wordwrap"])
+        assertEquals("5", parsed["entryassist.startcol"])
+        assertEquals("75", parsed["entryassist.endcol"])
+        assertEquals("true", parsed["entryassist.bell"])
+        assertEquals("70", parsed["entryassist.bellcol"])
+        assertEquals("5,10,15,20", parsed["entryassist.tabstops"])
+
+        assertEquals("true", parsed["modes.resetinsertonaid"])
+        assertEquals("true", parsed["modes.fourcoloroverride"])
+        assertEquals("false", parsed["modes.numericlock"])
+        assertEquals("true", parsed["modes.autoskip"])
+    }
+
+    @Test
+    fun testCmsFilenameFormatting() {
+        // Upload (local -> host)
+        assertEquals("PROFILE EXEC A", haus.nightmare.a3270.ui.formatHostFilename("profile.exec", haus.nightmare.lib3270j.ft.FTConfig.HostType.CMS))
+        assertEquals("TEST TXT A", haus.nightmare.a3270.ui.formatHostFilename("test.txt", haus.nightmare.lib3270j.ft.FTConfig.HostType.CMS))
+        assertEquals("README FILE A", haus.nightmare.a3270.ui.formatHostFilename("README", haus.nightmare.lib3270j.ft.FTConfig.HostType.CMS))
+
+        // Download (host -> local)
+        assertEquals("profile.exec", haus.nightmare.a3270.ui.formatLocalFilenameFromHost("PROFILE EXEC A", haus.nightmare.lib3270j.ft.FTConfig.HostType.CMS))
+        assertEquals("test.data", haus.nightmare.a3270.ui.formatLocalFilenameFromHost("TEST DATA A1", haus.nightmare.lib3270j.ft.FTConfig.HostType.CMS))
+
+        // TSO
+        assertEquals("'MYDATA'", haus.nightmare.a3270.ui.formatHostFilename("mydata.txt", haus.nightmare.lib3270j.ft.FTConfig.HostType.TSO))
+        assertEquals("dataset.txt", haus.nightmare.a3270.ui.formatLocalFilenameFromHost("'USER.DATASET'", haus.nightmare.lib3270j.ft.FTConfig.HostType.TSO))
+    }
+}