Retro/pcjs
Watch
1
0
Fork
You've already forked pcjs
 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Debugger changes for improved 32-bit support

Browse source
This commit is contained in:
Jeff Parsons 2015-02-28 11:55:55 -08:00 • committed by jeffpar
commit f50612e7ca
21 changed files with 3581 additions and 2949 deletions
Download patch file Download diff file Expand all files Collapse all files

20
modules/pcjs/lib/x86help.js
View file

@ -54,7 +54,7 @@ var X86Help = {
* @param {number} src (new value)
* @return {number} dst (src is overridden, replaced with regMD16, as specified by opMOVwsr())
*/
opHelpMOVSegSrc: function(dst, src) {
opHelpMOVMD16: function(dst, src) {
return X86Help.opHelpMOV.call(this, dst, this.regMD16);
},
/**
@ -468,8 +468,8 @@ var X86Help = {
* This instruction is always allowed to set MSW.PE, but it cannot clear MSW.PE once set;
* therefore, we always OR the previous value of MSW.PE into the new value before loading.
*/
w |= (this.regCR0 & X86.CR0.MSW.PE);
this.regCR0 = (this.regCR0 & X86.CR0.MSW.ON) | (w & ~X86.CR0.MSW.ON);
w |= (this.regCR0 & X86.CR0.MSW.PE) | X86.CR0.MSW.ON;
this.regCR0 = (this.regCR0 & ~X86.CR0.MSW.MASK) | (w & X86.CR0.MSW.MASK);
/*
* Since the 80286 cannot return to real-mode via this instruction, the only transition we
* must worry about is to protected-mode. And don't worry, there's no harm calling setProtMode()
@ -478,6 +478,20 @@ var X86Help = {
*/
if (this.regCR0 & X86.CR0.MSW.PE) this.setProtMode(true);
},
/**
* opHelpLCR0(l)
*
* This called on behalf of 80386 opcodes only (ie, MOV CR0,reg).
*
* TODO: Determine which CR0 bits, if any, cannot be modified by MOV CR0,reg.
*
* @this {X86CPU}
* @param {number} l
*/
opHelpLCR0: function(l) {
this.regCR0 = l;
this.setProtMode(!!(this.regCR0 & X86.CR0.MSW.PE));
},
/**
* opHelpCALLF(off, sel)
*