[ros-diffs] [aandrejevic] 60942: [NTVDM] Implement INT 15h, AH = 87h, "Copy Extended Memory".

Author: aandrejevic
Date: Mon Nov 11 16:47:10 2013
New Revision: 60942

URL: http://svn.reactos.org/svn/reactos?rev=60942&view=rev
Log:
[NTVDM]
Implement INT 15h, AH = 87h, "Copy Extended Memory".


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

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 16:47:10 2013
@@ -1181,6 +1181,38 @@
 {
     switch (getAH())
     {
+        /* Copy Extended Memory */
+        case 0x87:
+        {
+            WORD Count = getCX() * 2 - 1;
+            PFAST486_GDT_ENTRY Gdt = (PFAST486_GDT_ENTRY)SEG_OFF_TO_PTR(getES(),
getSI());
+            DWORD SourceBase = Gdt[2].Base + (Gdt[2].BaseMid << 16) +
(Gdt[2].BaseHigh << 24);
+            DWORD SourceLimit = Gdt[2].Limit + (Gdt[2].LimitHigh << 16);
+            DWORD DestBase = Gdt[3].Base + (Gdt[3].BaseMid << 16) +
(Gdt[3].BaseHigh << 24);
+            DWORD DestLimit = Gdt[3].Limit + (Gdt[3].LimitHigh << 16);
+
+            /* Check for flags */
+            if (Gdt[2].Granularity) SourceLimit = (SourceLimit << 12) | 0xFFF;
+            if (Gdt[3].Granularity) DestLimit = (DestLimit << 12) | 0xFFF;
+
+            if ((Count > SourceLimit) || (Count > DestLimit))
+            {
+                setAX(0x80);
+                Stack[STACK_FLAGS] |= EMULATOR_FLAG_CF;
+
+                break;
+            }
+
+            /* Copy */
+            RtlMoveMemory((PVOID)((ULONG_PTR)BaseAddress + DestBase),
+                          (PVOID)((ULONG_PTR)BaseAddress + SourceBase),
+                          Count);
+
+            setAX(ERROR_SUCCESS);
+            Stack[STACK_FLAGS] &= ~EMULATOR_FLAG_CF;
+            break;
+        }
+
         /* Get Extended Memory Size */
         case 0x88:
         {