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set offset of int1 higher (BioMenace fix)

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Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@2631
This commit is contained in:
Sebastian Strohhäcker 2006-05-21 19:21:31 +00:00
parent e6af839533
commit 01c7e8b454
1 changed files with 11 additions and 9 deletions
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20
src/dos/dos_memory.cpp
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@ -414,15 +414,17 @@ void DOS_SetupMemory(void) {
* buggy games, which compare against the interrupt table. (probably a
* broken linked list implementation) */
callbackhandler.Allocate(&DOS_default_handler,"DOS default int");
real_writeb(0x70,4,(Bit8u)0xFE); //GRP 4
real_writeb(0x70,5,(Bit8u)0x38); //Extra Callback instruction
real_writew(0x70,6,callbackhandler.Get_callback()); //The immediate word
real_writeb(0x70,8,(Bit8u)0xCF); //An IRET Instruction
real_writed(0,0x01*4,0x700004);
real_writed(0,0x02*4,0x700004); //BioMenace (segment<0x8000)
real_writed(0,0x03*4,0x700004); //Alien Incident (offset!=0)
real_writed(0,0x04*4,0x700004); //Shadow President (lower byte of segment!=0)
// real_writed(0,0x0f*4,0x700004); //Always a tricky one (soundblaster irq)
Bitu ihseg = 0x70;
Bitu ihofs = 0x08;
real_writeb(ihseg,ihofs+0x00,(Bit8u)0xFE); //GRP 4
real_writeb(ihseg,ihofs+0x01,(Bit8u)0x38); //Extra Callback instruction
real_writew(ihseg,ihofs+0x02,callbackhandler.Get_callback()); //The immediate word
real_writeb(ihseg,ihofs+0x04,(Bit8u)0xCF); //An IRET Instruction
RealSetVec(0x01,RealMake(ihseg,ihofs)); //BioMenace (offset!=4)
RealSetVec(0x02,RealMake(ihseg,ihofs)); //BioMenace (segment<0x8000)
RealSetVec(0x03,RealMake(ihseg,ihofs)); //Alien Incident (offset!=0)
RealSetVec(0x04,RealMake(ihseg,ihofs)); //Shadow President (lower byte of segment!=0)
// RealSetVec(0x0f,RealMake(ihseg,ihofs)); //Always a tricky one (soundblaster irq)
// Create a dummy device MCB with PSPSeg=0x0008
DOS_MCB mcb_devicedummy((Bit16u)DOS_MEM_START);