Mega Code Archive
Determine if you are running inside Virtual PC
<![CDATA[
Title: Determine if you are running inside Virtual PC?
{
This function can be used to determine whether your program is
running from within Connectrix's Virtual PC
}
function running_inside_vpc: boolean; assembler;
asm
push ebp
mov ecx, offset @@exception_handler
mov ebp, esp
push ebx
push ecx
push dword ptr fs:[0]
mov dword ptr fs:[0], esp
mov ebx, 0 // flag
mov eax, 1 // VPC function number
// call VPC
db 00Fh, 03Fh, 007h, 00Bh
mov eax, dword ptr ss:[esp]
mov dword ptr fs:[0], eax
add esp, 8
test ebx, ebx
setz al
lea esp, dword ptr ss:[ebp-4]
mov ebx, dword ptr ss:[esp]
mov ebp, dword ptr ss:[esp+4]
add esp, 8
jmp @@ret
@@exception_handler:
mov ecx, [esp+0Ch]
mov dword ptr [ecx+0A4h], -1 // EBX = -1 - not running, ebx = 0 - running
add dword ptr [ecx+0B8h], 4 // - skip past the detection code
xor eax, eax // exception is handled
ret
@@ret:
end;
]]>