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All PDP-11 opcode decoders implemented now

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Jeff 2016-09-28 13:45:36 -07:00 • committed by Jeff Parsons
commit 0ad98dc68b
9 changed files with 408 additions and 389 deletions
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80
modules/pdp11/lib/cpustate.js
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@ -601,6 +601,24 @@ CPUStatePDP11.prototype.interrupt = function(delay, priority, vector, callback)
this.priorityReview = 2;
};
/**
* checkInterruptDelay()
*
* @this {CPUStatePDP11}
*/
CPUStatePDP11.prototype.checkInterruptDelay = function()
{
var delay = 0;
for (var i = this.interruptQueue.length; --i >= 0;) {
delay += this.interruptQueue[i].delay;
this.interruptQueue[i].delay = 0;
}
if (!delay && this.runState === 0) {
this.runState = 2; // wait
this.endBurst();
}
};
/**
* checkInterruptQueue()
*
@ -1410,6 +1428,68 @@ CPUStatePDP11.prototype.getAddrVirtual = function(addressMode, accessFlags)
return this.mapVirtualToPhysical(this.getVirtualByMode(addressMode, accessFlags), accessFlags);
};
/**
* readWordFromPrevSpace(opCode, accessFlags)
*
* @this {CPUStatePDP11}
* @param {number} opCode
* @param {number} accessFlags (really just PDP11.ACCESS.DSPACE or PDP11.ACCESS.ISPACE)
* @return {number}
*/
CPUStatePDP11.prototype.readWordFromPrevSpace = function(opCode, accessFlags)
{
var src;
if (!(opCode & PDP11.OPMODE.MASK)) {
var reg = opCode & 7;
if (reg != 6 || ((this.regPSW >> 2) & PDP11.PSW.PMODE) === (this.regPSW & PDP11.PSW.PMODE)) {
src = this.regsGen[reg];
} else {
src = this.regsAltStack[(this.regPSW >> 12) & 3];
}
} else {
var addr = this.getVirtualByMode(opCode, PDP11.ACCESS.WORD);
if (!(accessFlags & PDP11.ACCESS.DSPACE)) {
if ((this.regPSW & 0xf000) !== 0xf000) addr &= 0xffff;
}
this.mmuMode = (this.regPSW >> 12) & 3;
src = this.readWordFromVirtual(addr | (accessFlags & PDP11.ACCESS.DSPACE));
this.mmuMode = (this.regPSW >> 14) & 3;
}
return src;
};
/**
* writeWordToPrevSpace(opCode, accessFlags, data)
*
* @this {CPUStatePDP11}
* @param {number} opCode
* @param {number} accessFlags (really just PDP11.ACCESS.DSPACE or PDP11.ACCESS.ISPACE)
* @param {number} data
* @return {number}
*/
CPUStatePDP11.prototype.writeWordToPrevSpace = function(opCode, accessFlags, data)
{
if (!(this.MMR0 & 0xe000)) {
this.MMR1 = 0x16;
}
if (!(opCode & 0x38)) {
var reg = opCode & 7;
if (reg != 6 || ((this.regPSW >> 2) & PDP11.PSW.PMODE) === (this.regPSW & PDP11.PSW.PMODE)) {
this.regsGen[reg] = data;
} else {
this.regsAltStack[(this.regPSW >> 12) & 3] = data;
}
} else {
var addr = this.getVirtualByMode(opCode, PDP11.ACCESS.WORD);
if (!(accessFlags & PDP11.ACCESS.DSPACE)) addr &= 0xffff;
this.mmuMode = (this.regPSW >> 12) & 3;
addr = this.mapVirtualToPhysical(addr | (accessFlags & PDP11.ACCESS.DSPACE), PDP11.ACCESS.WRITE);
this.mmuMode = (this.regPSW >> 14) & 3;
this.writeWordToPhysical(addr, data);
}
return data;
};
/**
* readWordByMode(addressMode)
*