[aandrejevic] 67560: [NTVDM] Fix the BIOS handling of extended scancodes.

Author: aandrejevic
Date: Tue May  5 17:37:06 2015
New Revision: 67560

URL: http://svn.reactos.org/svn/reactos?rev=67560&view=rev
Log:
[NTVDM]
Fix the BIOS handling of extended scancodes.

Modified:
    trunk/reactos/subsystems/mvdm/ntvdm/bios/bios32/kbdbios32.c

Modified: trunk/reactos/subsystems/mvdm/ntvdm/bios/bios32/kbdbios32.c
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/subsystems/mvdm/ntvdm/bios/...
==============================================================================
--- trunk/reactos/subsystems/mvdm/ntvdm/bios/bios32/kbdbios32.c	[iso-8859-1] (original)
+++ trunk/reactos/subsystems/mvdm/ntvdm/bios/bios32/kbdbios32.c	[iso-8859-1] Tue May  5 17:37:06 2015
@@ -87,7 +87,7 @@
         /* Wait for keystroke and read */
         case 0x00:
         /* Wait for extended keystroke and read */
-        case 0x10:  // FIXME: Temporarily do the same as INT 16h, 00h
+        case 0x10:
         {
             WORD Character;

@@ -99,6 +99,12 @@
                 break;
             }

+            if (getAH() == 0x00 && LOBYTE(Character) == 0xE0)
+            {
+                /* Clear the extended code */
+                Character &= 0xFF00;
+            }
+
             BiosKbdBufferPop();
             setAX(Character);

@@ -108,7 +114,7 @@
         /* Get keystroke status */
         case 0x01:
         /* Get extended keystroke status */
-        case 0x11:  // FIXME: Temporarily do the same as INT 16h, 01h
+        case 0x11:
         {
             WORD Character;

@@ -122,6 +128,12 @@
             {
                 /* No character, set ZF */
                 Stack[STACK_FLAGS] |= EMULATOR_FLAG_ZF;
+            }
+
+            if (getAH() == 0x01 && LOBYTE(Character) == 0xE0)
+            {
+                /* Clear the extended code */
+                Character &= 0xFF00;
             }

break;
@@ -176,6 +188,7 @@
 // Keyboard IRQ 1
 static VOID WINAPI BiosKeyboardIrq(LPWORD Stack)
 {
+    static BOOLEAN Extended = FALSE;
     BOOLEAN SkipScanCode;
     BYTE ScanCode, VirtualKey;
     WORD Character;
@@ -204,6 +217,12 @@
     setAX(AX);
     setCF(CF);

+    if (ScanCode == 0xE0)
+    {
+        Extended = TRUE;
+        goto Quit;
+    }
+
     /* Check whether CF is clear. If so, skip the scan code. */
     if (SkipScanCode) goto Quit;

@@ -242,10 +261,10 @@

default:
             {
-                Character = 0;
-
-                /* If ALT isn't held down, find out which character this is */
-                if (!(Bda->KeybdShiftFlags & (BDA_KBDFLAG_ALT | BDA_KBDFLAG_LALT | BDA_KBDFLAG_RALT)))
+                Character = Extended ? 0xE0 : 0x00;
+
+                /* If this is not an extended scancode, and ALT isn't held down, find out which character this is */
+                if (!Extended && !(Bda->KeybdShiftFlags & (BDA_KBDFLAG_ALT | BDA_KBDFLAG_LALT | BDA_KBDFLAG_RALT)))
                 {
                     if (ToAscii(VirtualKey, ScanCode, BiosKeyboardMap, &Character, 0) == 0)
                     {
@@ -287,6 +306,9 @@
     if (BiosKeyboardMap[VK_CAPITAL]  & (1 << 7)) Bda->KeybdShiftFlags |= BDA_KBDFLAG_CAPSLOCK;
     if (BiosKeyboardMap[VK_INSERT]   & (1 << 7)) Bda->KeybdShiftFlags |= BDA_KBDFLAG_INSERT;

+    /* Clear the extended key flag */
+    Extended = FALSE;
+
     DPRINT("BiosKeyboardIrq - Character = 0x%X, ScanCode = 0x%X, KeybdShiftFlags = 0x%X\n",
            Character, ScanCode, Bda->KeybdShiftFlags);