[aandrejevic] 60773: [NTVDM] The PS/2 should latch the last value that was read in the case of multiple reads. Modify the BIOS keyboard IRQ handler to support hooks.

Author: aandrejevic
Date: Sun Oct 27 19:08:58 2013
New Revision: 60773

URL: http://svn.reactos.org/svn/reactos?rev=60773&view=rev
Log:
[NTVDM]
The PS/2 should latch the last value that was read in the case of multiple reads.
Modify the BIOS keyboard IRQ handler to support hooks.

Modified:
    branches/ntvdm/subsystems/ntvdm/bios.c
    branches/ntvdm/subsystems/ntvdm/ps2.c

Modified: branches/ntvdm/subsystems/ntvdm/bios.c
URL: http://svn.reactos.org/svn/reactos/branches/ntvdm/subsystems/ntvdm/bios.c?re...
==============================================================================
--- branches/ntvdm/subsystems/ntvdm/bios.c	[iso-8859-1] (original)
+++ branches/ntvdm/subsystems/ntvdm/bios.c	[iso-8859-1] Sun Oct 27 19:08:58 2013
@@ -1132,9 +1132,9 @@
         {
             BYTE ScanCode, VirtualKey;
             WORD Character;
-            
+
             /* Loop while there is a scancode available */
-            while (KeyboardReadStatus() & 1)
+            do
             {
                 /* Get the scan code and virtual key code */
                 ScanCode = KeyboardReadData();
@@ -1173,6 +1173,7 @@
                     BiosKeyboardMap[VirtualKey] &= ~(1 << 7);
                 }
             }
+            while (KeyboardReadStatus() & 1);

/* Clear the keyboard flags */
             Bda->KeybdShiftFlags = 0;

Modified: branches/ntvdm/subsystems/ntvdm/ps2.c
URL: http://svn.reactos.org/svn/reactos/branches/ntvdm/subsystems/ntvdm/ps2.c?rev...
==============================================================================
--- branches/ntvdm/subsystems/ntvdm/ps2.c	[iso-8859-1] (original)
+++ branches/ntvdm/subsystems/ntvdm/ps2.c	[iso-8859-1] Sun Oct 27 19:08:58 2013
@@ -20,7 +20,7 @@
 static BOOLEAN KeyboardQueueEmpty = TRUE;
 static UINT KeyboardQueueStart = 0;
 static UINT KeyboardQueueEnd = 0;
-static BYTE KeyboardResponse = 0;
+static BYTE KeyboardData = 0, KeyboardResponse = 0;
 static BOOLEAN KeyboardReadResponse = FALSE, KeyboardWriteResponse = FALSE;
 static BYTE KeyboardConfig = PS2_DEFAULT_CONFIG;

@@ -190,19 +190,19 @@

BYTE KeyboardReadData()
 {
-    BYTE Value = 0;
-
     /* If there was a response byte from the controller, return it */
     if (KeyboardReadResponse)
     {
         KeyboardReadResponse = FALSE;
-        return KeyboardResponse;
-    }
-    
-    /* Otherwise, read the data from the queue */
-    KeyboardQueuePop(&Value);
-
-    return Value;
+        KeyboardData = KeyboardResponse;
+    }
+    else
+    {
+        /* Otherwise, read the data from the queue */
+        KeyboardQueuePop(&KeyboardData);
+    }
+
+    return KeyboardData;
 }

VOID KeyboardWriteData(BYTE Data)