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Fixed I/O port handling

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This commit is contained in:
Jeff Parsons 2015-07-15 14:32:20 -07:00
commit e76655a48f
3 changed files with 438 additions and 20 deletions
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32
modules/pcjs/lib/x86ops.js
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@ -1347,7 +1347,6 @@ X86.opFS = function FS()
this.opFlags |= X86.OPFLAG.SEG | X86.OPFLAG.NOINTR;
this.segData = this.segStack = this.segFS;
this.nStepCycles -= this.cycleCounts.nOpCyclesPrefix;
this.stopCPU();
};
/**
@ -1364,7 +1363,6 @@ X86.opGS = function GS()
this.opFlags |= X86.OPFLAG.SEG | X86.OPFLAG.NOINTR;
this.segData = this.segStack = this.segGS;
this.nStepCycles -= this.cycleCounts.nOpCyclesPrefix;
this.stopCPU();
};
/**
@ -1475,7 +1473,7 @@ X86.opINSb = function INSb()
}
if (nReps--) {
var b = this.bus.checkPortInputNotify(this.regEDX, this.regLIP - nDelta - 1);
var b = this.bus.checkPortInputNotify(this.regEDX & 0xffff, this.regLIP - nDelta - 1);
if (BACKTRACK) this.backTrack.btiMemLo = this.backTrack.btiIO;
this.setSOByte(this.segES, this.regEDI & this.addrMask, b);
this.regEDI = (this.regEDI & ~this.addrMask) | ((this.regEDI + ((this.regPS & X86.PS.DF)? -1 : 1)) & this.addrMask);
@ -1524,7 +1522,7 @@ X86.opINSw = function INSw()
var addrFrom = this.regLIP - nDelta - 1;
var w = 0, shift = 0;
for (var n = 0; n < this.dataSize; n++) {
w |= this.bus.checkPortInputNotify(this.regEDX, addrFrom) << shift;
w |= this.bus.checkPortInputNotify(this.regEDX & 0xffff, addrFrom) << shift;
shift += 8;
if (BACKTRACK) {
if (!n) {
@ -1581,7 +1579,7 @@ X86.opOUTSb = function OUTSb()
this.regESI = (this.regESI & ~this.addrMask) | ((this.regESI + ((this.regPS & X86.PS.DF)? -1 : 1)) & this.addrMask);
this.nStepCycles -= nCycles;
if (BACKTRACK) this.backTrack.btiIO = this.backTrack.btiMemLo;
this.bus.checkPortOutputNotify(this.regEDX, b, this.regLIP - nDelta - 1);
this.bus.checkPortOutputNotify(this.regEDX & 0xffff, b, this.regLIP - nDelta - 1);
this.regECX = (this.regECX & ~this.addrMask) | ((this.regECX - nDelta) & this.addrMask);
if (nReps) {
if (BUGS_8086) {
@ -1634,7 +1632,7 @@ X86.opOUTSw = function OUTSw()
this.backTrack.btiIO = this.backTrack.btiMemHi;
}
}
this.bus.checkPortOutputNotify(this.regEDX, (w >> shift) & 0xff, addrFrom);
this.bus.checkPortOutputNotify(this.regEDX & 0xffff, (w >> shift) & 0xff, addrFrom);
shift += 8;
}
this.regECX = (this.regECX & ~this.addrMask) | ((this.regECX - nDelta) & this.addrMask);
@ -3623,7 +3621,12 @@ X86.opINw = function INw()
var port = this.getIPByte();
this.regEAX = this.bus.checkPortInputNotify(port, this.regLIP - 2);
if (BACKTRACK) this.backTrack.btiAL = this.backTrack.btiIO;
this.regEAX |= (this.bus.checkPortInputNotify((port + 1) & 0xffff, this.regLIP - 2) << 8);
/*
* TODO: Specs are clear that bits 8-15 of the port address for the FIRST byte of I/O will be zero, but
* what about the SECOND byte? If the port is 0xff, will the SECOND byte of I/O use port 0x00 or 0x100?
* Our code (below) assumes the latter. Mask (port + 1) with 0xff if it turns out the former is true.
*/
this.regEAX |= (this.bus.checkPortInputNotify(port + 1, this.regLIP - 2) << 8);
if (BACKTRACK) this.backTrack.btiAH = this.backTrack.btiIO;
this.nStepCycles -= this.cycleCounts.nOpCyclesInP;
};
@ -3649,7 +3652,12 @@ X86.opOUTw = function OUTw()
{
var port = this.getIPByte();
this.bus.checkPortOutputNotify(port, this.regEAX & 0xff, this.regLIP - 2);
this.bus.checkPortOutputNotify((port + 1) & 0xffff, this.regEAX >> 8, this.regLIP - 2);
/*
* TODO: Specs are clear that bits 8-15 of the port address for the FIRST byte of I/O will be zero, but
* what about the SECOND byte? If the port is 0xff, will the SECOND byte of I/O use port 0x00 or 0x100?
* Our code (below) assumes the latter. Mask (port + 1) with 0xff if it turns out the former is true.
*/
this.bus.checkPortOutputNotify(port + 1, this.regEAX >> 8, this.regLIP - 2);
this.nStepCycles -= this.cycleCounts.nOpCyclesOutP;
};
@ -3711,7 +3719,7 @@ X86.opJMPs = function JMPs()
*/
X86.opINDXb = function INDXb()
{
this.regEAX = (this.regEAX & ~0xff) | this.bus.checkPortInputNotify(this.regEDX, this.regLIP - 1);
this.regEAX = (this.regEAX & ~0xff) | this.bus.checkPortInputNotify(this.regEDX & 0xffff, this.regLIP - 1);
if (BACKTRACK) this.backTrack.btiAL = this.backTrack.btiIO;
this.nStepCycles -= this.cycleCounts.nOpCyclesInDX;
};
@ -3723,7 +3731,7 @@ X86.opINDXb = function INDXb()
*/
X86.opINDXw = function INDXw()
{
this.regEAX = this.bus.checkPortInputNotify(this.regEDX, this.regLIP - 1);
this.regEAX = this.bus.checkPortInputNotify(this.regEDX & 0xffff, this.regLIP - 1);
if (BACKTRACK) this.backTrack.btiAL = this.backTrack.btiIO;
this.regEAX |= (this.bus.checkPortInputNotify((this.regEDX + 1) & 0xffff, this.regLIP - 1) << 8);
if (BACKTRACK) this.backTrack.btiAH = this.backTrack.btiIO;
@ -3738,7 +3746,7 @@ X86.opINDXw = function INDXw()
X86.opOUTDXb = function OUTDXb()
{
if (BACKTRACK) this.backTrack.btiIO = this.backTrack.btiAL;
this.bus.checkPortOutputNotify(this.regEDX, this.regEAX & 0xff, this.regLIP - 1);
this.bus.checkPortOutputNotify(this.regEDX & 0xffff, this.regEAX & 0xff, this.regLIP - 1);
this.nStepCycles -= this.cycleCounts.nOpCyclesOutDX;
};
@ -3750,7 +3758,7 @@ X86.opOUTDXb = function OUTDXb()
X86.opOUTDXw = function OUTDXw()
{
if (BACKTRACK) this.backTrack.btiIO = this.backTrack.btiAL;
this.bus.checkPortOutputNotify(this.regEDX, this.regEAX & 0xff, this.regLIP - 1);
this.bus.checkPortOutputNotify(this.regEDX & 0xffff, this.regEAX & 0xff, this.regLIP - 1);
if (BACKTRACK) this.backTrack.btiIO = this.backTrack.btiAH;
this.bus.checkPortOutputNotify((this.regEDX + 1) & 0xffff, this.regEAX >> 8, this.regLIP - 1);
this.nStepCycles -= this.cycleCounts.nOpCyclesOutDX;