From: Aleksandar Andrejevic <aandrejevic@reactos.org>
Date: Mon, 11 Nov 2013 04:00:10 +0000 (+0000)
Subject: [NTVDM]
X-Git-Tag: backups/0.3.17@66124~1365^2~257
X-Git-Url: https://git.reactos.org/?p=reactos.git;a=commitdiff_plain;h=e53821aed0fecbbd62ea92daced5567e635186cb;hp=442302eeb32112c1f49592a0d3dfba0d056a6111

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


svn path=/branches/ntvdm/; revision=60938
---

diff --git a/subsystems/ntvdm/bios.c b/subsystems/ntvdm/bios.c
index 2363e5ba00f..a08e831e22c 100644
--- a/subsystems/ntvdm/bios.c
+++ b/subsystems/ntvdm/bios.c
@@ -481,6 +481,7 @@ BOOLEAN BiosInitialize(VOID)
     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);
@@ -1176,6 +1177,30 @@ VOID WINAPI BiosGetMemorySize(LPWORD Stack)
     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)
 {
     switch (getAH())
diff --git a/subsystems/ntvdm/bios.h b/subsystems/ntvdm/bios.h
index 7ca303c99f3..8651389dbcd 100644
--- a/subsystems/ntvdm/bios.h
+++ b/subsystems/ntvdm/bios.h
@@ -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 @@ BOOLEAN BiosScrollWindow(
 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);