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More 80386 support, and an audio API change forced by Chrome

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This commit is contained in:
Jeff Parsons 2015-03-06 19:33:35 -08:00 • committed by jeffpar
commit d3d431eb2c
9 changed files with 2406 additions and 2358 deletions
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26
modules/pcjs/lib/x86cpu.js
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@ -942,7 +942,7 @@ X86CPU.prototype.resetRegs = function()
this.setCSIP(0, 0xffff); // this should be called before the first setPS() call
if (!I386) this.setSizes();
if (!I386) this.resetSizes();
if (BACKTRACK) {
/*
@ -1073,11 +1073,11 @@ X86CPU.prototype.setDataSize = function()
};
/**
* setSizes()
* resetSizes()
*
* @this {X86CPU}
*/
X86CPU.prototype.setSizes = function()
X86CPU.prototype.resetSizes = function()
{
/*
* The following contain the (default) ADDRESS size (2 for 16 bits, 4 for 32 bits), and the corresponding
@ -1109,6 +1109,8 @@ X86CPU.prototype.setSizes = function()
this.dataMask = this.segCS.dataMask;
this.setDataSize();
this.opPrefixes &= ~(X86.OPFLAG.ADDRSIZE | X86.OPFLAG.DATASIZE);
};
/**
@ -1441,7 +1443,7 @@ X86CPU.prototype.setCS = function(sel)
var regEIP = this.getIP();
this.regLIP = this.segCS.load(sel) + regEIP;
this.regLIPLimit = this.segCS.base + this.segCS.limit;
if (I386) this.setSizes();
if (I386) this.resetSizes();
if (!BUGS_8086) this.opFlags |= this.OPFLAG_NOINTR8086;
if (PREFETCH) this.flushPrefetch(this.regLIP);
};
@ -1641,7 +1643,7 @@ X86CPU.prototype.setCSIP = function(off, sel, fCall)
if (base != X86.ADDR_INVALID) {
this.regLIP = base + this.regEIP;
this.regLIPLimit = base + this.segCS.limit;
if (I386) this.setSizes();
if (I386) this.resetSizes();
if (PREFETCH) this.flushPrefetch(this.regLIP);
return this.segCS.fStackSwitch;
}
@ -3196,17 +3198,25 @@ X86CPU.prototype.stepCPU = function(nMinCycles)
* NOTE: The way we restart string instructions actually fixes an 8086/8088 flaw, because string
* instructions with multiple prefixes (eg, a REP and a segment override) would not be restarted
* properly following a hardware interrupt. The recommended workarounds were to either turn off
* interrupts or make sure the REP prefix was first and follow the string instruction with a LOOPNZ
* back to the REP. To emulate this flawed behavior, turn on BUGS_8086.
* interrupts or to follow the string instruction with a LOOPNZ back to the first prefix byte.
* To emulate this flawed behavior, turn on BUGS_8086.
*/
this.opLIP = this.regLIP;
this.segData = this.segDS;
this.segStack = this.segSS;
this.regEA = this.regEAWrite = X86.ADDR_INVALID;
if (I386) this.setSizes();
if (I386 && (this.opPrefixes & (X86.OPFLAG.ADDRSIZE | X86.OPFLAG.DATASIZE))) {
this.resetSizes();
if (DEBUG && DEBUGGER) {
this.println("80386 override processed");
this.stopCPU();
break;
}
}
this.opPrefixes = this.opFlags & X86.OPFLAG.REPEAT;
if (this.intFlags) {
if (this.checkINTR()) {
if (!nMinCycles) {