Intravision/reactos
1
0
Fork 0
mirror of https://github.com/reactos/reactos.git synced 2024-08-04 10:30:59 +00:00
Code Issues Packages Projects Releases Wiki Activity

[NTVDM]

Browse source 
Implement INT 15h, AH = 87h, "Copy Extended Memory".


svn path=/branches/ntvdm/; revision=60942
This commit is contained in:
Aleksandar Andrejevic 2013-11-11 16:47:10 +00:00
parent 77930f2a21
commit 9ccaa9f1c4
1 changed files with 32 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

32
subsystems/ntvdm/bios.c
View file

@ -1181,6 +1181,38 @@ VOID WINAPI BiosMiscService(LPWORD Stack)
{
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:
{