[aandrejevic] 60938: [NTVDM] Implement the miscellaneous BIOS system service (INT 15h) handler. Implement INT 15h, AH = 88h, "Get Extended Memory Size".

Author: aandrejevic
Date: Mon Nov 11 04:00:10 2013
New Revision: 60938
URL: http://svn.reactos.org/svn/reactos?rev=60938&view=rev
Log:
[NTVDM]
Implement the miscellaneous BIOS system service (INT 15h) handler.
Implement INT 15h, AH = 88h, "Get Extended Memory Size".
Modified:
    branches/ntvdm/subsystems/ntvdm/bios.c
    branches/ntvdm/subsystems/ntvdm/bios.h
Modified: branches/ntvdm/subsystems/ntvdm/bios.c
URL:
http://svn.reactos.org/svn/reactos/branches/ntvdm/subsystems/ntvdm/bios.c?r…
==============================================================================
--- branches/ntvdm/subsystems/ntvdm/bios.c      [iso-8859-1] (original)
+++ branches/ntvdm/subsystems/ntvdm/bios.c      [iso-8859-1] Mon Nov 11 04:00:10 2013
@@ -481,6 +481,7 @@
     RegisterInt32(BIOS_VIDEO_INTERRUPT    , BiosVideoService        );
     RegisterInt32(BIOS_EQUIPMENT_INTERRUPT, BiosEquipmentService    );
     RegisterInt32(BIOS_MEMORY_SIZE        , BiosGetMemorySize       );
+    RegisterInt32(BIOS_MISC_INTERRUPT     , BiosMiscService         );
     RegisterInt32(BIOS_KBD_INTERRUPT      , BiosKeyboardService     );
     RegisterInt32(BIOS_TIME_INTERRUPT     , BiosTimeService         );
     RegisterInt32(BIOS_SYS_TIMER_INTERRUPT, BiosSystemTimerInterrupt);
@@ -1174,6 +1175,30 @@
 {
     /* Return the conventional memory size in kB, typically 640 kB */
     setAX(Bda->MemorySize);
+}
+
+VOID WINAPI BiosMiscService(LPWORD Stack)
+{
+    switch (getAH())
+    {
+        /* Get Extended Memory Size */
+        case 0x88:
+        {
+            /* Return the number of KB of RAM after 1 MB */
+            setAX((MAX_ADDRESS - 0x100000) / 1024);
+
+            /* Clear CF */
+            Stack[STACK_FLAGS] &= ~EMULATOR_FLAG_CF;
+
+            break;
+        }
+
+        default:
+        {
+            DPRINT1("BIOS Function INT 15h, AH = 0x%02X NOT IMPLEMENTED\n",
+                    getAH());
+        }
+    }
 }
 VOID WINAPI BiosKeyboardService(LPWORD Stack)
Modified: branches/ntvdm/subsystems/ntvdm/bios.h
URL:
http://svn.reactos.org/svn/reactos/branches/ntvdm/subsystems/ntvdm/bios.h?r…
==============================================================================
--- branches/ntvdm/subsystems/ntvdm/bios.h      [iso-8859-1] (original)
+++ branches/ntvdm/subsystems/ntvdm/bios.h      [iso-8859-1] Mon Nov 11 04:00:10 2013
@@ -27,6 +27,7 @@
 #define BIOS_VIDEO_INTERRUPT        0x10
 #define BIOS_EQUIPMENT_INTERRUPT    0x11
 #define BIOS_MEMORY_SIZE            0x12
+#define BIOS_MISC_INTERRUPT         0x15
 #define BIOS_KBD_INTERRUPT          0x16
 #define BIOS_TIME_INTERRUPT         0x1A
 #define BIOS_SYS_TIMER_INTERRUPT    0x1C
@@ -171,6 +172,7 @@
 VOID WINAPI BiosVideoService(LPWORD Stack);
 VOID WINAPI BiosEquipmentService(LPWORD Stack);
 VOID WINAPI BiosGetMemorySize(LPWORD Stack);
+VOID WINAPI BiosMiscService(LPWORD Stack);
 VOID WINAPI BiosKeyboardService(LPWORD Stack);
 VOID WINAPI BiosTimeService(LPWORD Stack);
 VOID WINAPI BiosSystemTimerInterrupt(LPWORD Stack);