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add TRx handling opcodes (fixes JetFighter2, thanks to vasyl)

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Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@2700
This commit is contained in:
Sebastian Strohhäcker 2006-09-17 13:38:30 +00:00
parent acce481653
commit bd65320c7e
6 changed files with 78 additions and 6 deletions
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39
src/cpu/cpu.cpp
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@ -16,7 +16,7 @@
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/* $Id: cpu.cpp,v 1.84 2006-09-14 18:46:48 qbix79 Exp $ */
/* $Id: cpu.cpp,v 1.85 2006-09-17 13:38:30 c2woody Exp $ */
#include <assert.h>
#include "dosbox.h"
@ -1561,6 +1561,38 @@ bool CPU_READ_DRX(Bitu dr,Bit32u & retvalue) {
return false;
}
bool CPU_WRITE_TRX(Bitu tr,Bitu value) {
/* Check if privileged to access control registers */
if (cpu.pmode && (cpu.cpl>0)) return CPU_PrepareException(EXCEPTION_GP,0);
switch (tr) {
// case 3:
case 6:
case 7:
cpu.trx[tr]=value;
return false;
default:
LOG(LOG_CPU,LOG_ERROR)("Unhandled MOV TR%d,%X",tr,value);
break;
}
return CPU_PrepareException(EXCEPTION_UD,0);
}
bool CPU_READ_TRX(Bitu tr,Bit32u & retvalue) {
/* Check if privileged to access control registers */
if (cpu.pmode && (cpu.cpl>0)) return CPU_PrepareException(EXCEPTION_GP,0);
switch (tr) {
// case 3:
case 6:
case 7:
retvalue=cpu.trx[tr];
return false;
default:
LOG(LOG_CPU,LOG_ERROR)("Unhandled MOV XXX, TR%d",tr);
break;
}
return CPU_PrepareException(EXCEPTION_UD,0);
}
void CPU_SMSW(Bitu & word) {
word=cpu.cr0;
@ -1976,7 +2008,10 @@ public:
cpu.idt.SetBase(0);
cpu.idt.SetLimit(1023);
for (Bitu i=0; i<7; i++) cpu.drx[i]=0;
for (Bitu i=0; i<7; i++) {
cpu.drx[i]=0;
cpu.trx[i]=0;
}
cpu.drx[6]=0xffff1ff0;
cpu.drx[7]=0x00000400;