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

v1.19.2: Added support for timer Read-Back command, segment probes, and improved instruction restartability

Browse source
This commit is contained in:
Jeff Parsons 2015-08-24 17:27:34 -07:00
commit 927a71d681
171 changed files with 9205 additions and 2121 deletions
Download patch file Download diff file Expand all files Collapse all files

56
modules/pcjs/lib/x86cpu.js
View file

@ -1294,11 +1294,10 @@ X86CPU.prototype.resetRegs = function()
* or a triple-fault (ie, a processor reset).
*/
this.nFault = -1;
/*
* These are used to snapshot regLIP and regLSP, to help make instructions restartable;
* currently opLIP is updated prior to every instruction, but opLSP is updated only for
* "problematic" instructions (eg, RETF) and should otherwise remain set to X86.ADDR_INVALID.
* currently opLIP is updated prior to every instruction, but opLSP is updated only for instructions
* that read/write the stack (eg, RETF) and should otherwise remain set to X86.ADDR_INVALID.
*/
this.opLIP = this.opLSP = X86.ADDR_INVALID;
@ -2098,11 +2097,15 @@ X86CPU.prototype.getCS = function()
*
* @this {X86CPU}
* @param {number} sel
* @return {boolean}
*/
X86CPU.prototype.setCS = function(sel)
{
this.setCSIP(this.getIP(), sel);
if (!BUGS_8086) this.opFlags |= this.OPFLAG_NOINTR_8086;
if (this.setCSIP(this.getIP(), sel) != null) {
if (!BUGS_8086) this.opFlags |= this.OPFLAG_NOINTR_8086;
return true;
}
return false;
};
/**
@ -2124,8 +2127,11 @@ X86CPU.prototype.getDS = function()
*/
X86CPU.prototype.setDS = function(sel)
{
this.segDS.load(sel);
if (!BUGS_8086) this.opFlags |= this.OPFLAG_NOINTR_8086;
if (this.segDS.load(sel) !== X86.ADDR_INVALID) {
if (!BUGS_8086) this.opFlags |= this.OPFLAG_NOINTR_8086;
return true;
}
return false;
};
/**
@ -2145,19 +2151,25 @@ X86CPU.prototype.getSS = function()
* @this {X86CPU}
* @param {number} sel
* @param {boolean} [fInterruptable]
* @return {boolean}
*/
X86CPU.prototype.setSS = function(sel, fInterruptable)
{
var regESP = this.getSP();
this.regLSP = (this.segSS.load(sel) + regESP)|0;
if (this.segSS.fExpDown) {
this.regLSPLimit = (this.segSS.base + this.segSS.addrMask)|0;
this.regLSPLimitLow = (this.segSS.base + this.segSS.limit)|0;
} else {
this.regLSPLimit = (this.segSS.base + this.segSS.limit)|0;
this.regLSPLimitLow = this.segSS.base;
var regLSP = this.segSS.load(sel);
if (regLSP !== X86.ADDR_INVALID) {
this.regLSP = (regLSP + regESP)|0;
if (this.segSS.fExpDown) {
this.regLSPLimit = (this.segSS.base + this.segSS.addrMask)|0;
this.regLSPLimitLow = (this.segSS.base + this.segSS.limit)|0;
} else {
this.regLSPLimit = (this.segSS.base + this.segSS.limit)|0;
this.regLSPLimitLow = this.segSS.base;
}
if (!BUGS_8086 && !fInterruptable) this.opFlags |= X86.OPFLAG.NOINTR;
return true;
}
if (!BUGS_8086 && !fInterruptable) this.opFlags |= X86.OPFLAG.NOINTR;
return false;
};
/**
@ -2176,11 +2188,15 @@ X86CPU.prototype.getES = function()
*
* @this {X86CPU}
* @param {number} sel
* @return {boolean}
*/
X86CPU.prototype.setES = function(sel)
{
this.segES.load(sel);
if (!BUGS_8086) this.opFlags |= this.OPFLAG_NOINTR_8086;
if (this.segES.load(sel) !== X86.ADDR_INVALID) {
if (!BUGS_8086) this.opFlags |= this.OPFLAG_NOINTR_8086;
return true;
}
return false;
};
/**
@ -2203,10 +2219,11 @@ X86CPU.prototype.getFS = function()
*
* @this {X86CPU}
* @param {number} sel
* @return {boolean}
*/
X86CPU.prototype.setFS = function(sel)
{
this.segFS.load(sel);
return this.segFS.load(sel) !== X86.ADDR_INVALID;
};
/**
@ -2229,10 +2246,11 @@ X86CPU.prototype.getGS = function()
*
* @this {X86CPU}
* @param {number} sel
* @return {boolean}
*/
X86CPU.prototype.setGS = function(sel)
{
this.segGS.load(sel);
return this.segGS.load(sel) !== X86.ADDR_INVALID;
};
/**