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Fixed high 8-bit register MOVs, restricted ACCESSED bit updates to SEGMENT descriptors, and prevented the Debugger from looping endlessly on bad instructions

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This commit is contained in:
Jeff Parsons 2015-08-20 22:42:27 -07:00
commit 2d7cbe2864
4 changed files with 33 additions and 28 deletions
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8
modules/pcjs/lib/x86ops.js
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@ -3079,7 +3079,7 @@ X86.opMOVBLb = function MOVBLb()
*/
X86.opMOVAHb = function MOVAHb()
{
this.regEAX = (this.regEAX & 0xff) | (this.getIPByte() << 8);
this.regEAX = (this.regEAX & ~0xff00) | (this.getIPByte() << 8);
if (BACKTRACK) this.backTrack.btiAH = this.backTrack.btiMem0;
this.nStepCycles -= this.cycleCounts.nOpCyclesLAHF;
};
@ -3091,7 +3091,7 @@ X86.opMOVAHb = function MOVAHb()
*/
X86.opMOVCHb = function MOVCHb()
{
this.regECX = (this.regECX & 0xff) | (this.getIPByte() << 8);
this.regECX = (this.regECX & ~0xff00) | (this.getIPByte() << 8);
if (BACKTRACK) this.backTrack.btiCH = this.backTrack.btiMem0;
this.nStepCycles -= this.cycleCounts.nOpCyclesLAHF;
};
@ -3103,7 +3103,7 @@ X86.opMOVCHb = function MOVCHb()
*/
X86.opMOVDHb = function MOVDHb()
{
this.regEDX = (this.regEDX & 0xff) | (this.getIPByte() << 8);
this.regEDX = (this.regEDX & ~0xff00) | (this.getIPByte() << 8);
if (BACKTRACK) this.backTrack.btiDH = this.backTrack.btiMem0;
this.nStepCycles -= this.cycleCounts.nOpCyclesLAHF;
};
@ -3115,7 +3115,7 @@ X86.opMOVDHb = function MOVDHb()
*/
X86.opMOVBHb = function MOVBHb()
{
this.regEBX = (this.regEBX & 0xff) | (this.getIPByte() << 8);
this.regEBX = (this.regEBX & ~0xff00) | (this.getIPByte() << 8);
if (BACKTRACK) this.backTrack.btiBH = this.backTrack.btiMem0;
this.nStepCycles -= this.cycleCounts.nOpCyclesLAHF;
};