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Fixed CPU start/stop control; runCPU is now strictly a worker function, not a control interface (PDP-11 only; other CPUs still need to be updated to match)

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Jeff 2016-09-28 22:21:52 -07:00 • committed by Jeff Parsons
commit c7dbfc02be
18 changed files with 945 additions and 918 deletions
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10
modules/pdp11/lib/cpustate.js
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@ -912,8 +912,8 @@ CPUStatePDP11.prototype.trap = function(vector, reason)
this.trapPSW = -1; // reset flag that we have a trap within a trap
if (DEBUG && this.dbg) {
if (reason != PDP11.REASON.INTERRUPT) {
this.dbg.println("trap to vector " + this.dbg.toBase(vector, 0, true) + (reason? " (reason " + reason + ")" : ""));
if (this.messageEnabled(MessagesPDP11.TRAP)) {
this.printMessage("trap to vector " + this.dbg.toBase(vector, 0, true) + (reason? " (reason " + reason + ")" : ""), MessagesPDP11.TRAP, true);
}
}
@ -1719,7 +1719,11 @@ CPUStatePDP11.prototype.stepCPU = function(nMinCycles)
this.opFlags &= ~PDP11.OPFLAG.TRAP_MASK;
}
if (this.priorityReview) {
/*
* By requiring nMinCycles to be non-zero before checking the interrupt queue, we avoid
* interrupting the natural flow of instructions when the Debugger is stepping through code.
*/
if (nMinCycles && this.priorityReview) {
this.checkInterruptQueue();
}