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Eliminated unused exception handler

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This commit is contained in:
Jeff Parsons 2016-05-12 19:10:23 -07:00
commit 5d76d662a0
2 changed files with 48 additions and 15 deletions
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16
modules/pc8080/lib/cpu.js
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@ -969,21 +969,7 @@ CPU.prototype.runCPU = function(fUpdateFocus)
* nCyclesPerBurst is how many cycles we WANT to run on each iteration of stepCPU(), but it may run
* significantly less (or slightly more, since we can't execute partial instructions).
*/
try {
this.stepCPU(nCyclesPerBurst);
}
catch(exception) {
if (typeof exception != "number") throw exception;
if (MAXDEBUG) this.println("CPU exception " + str.toHexByte(exception));
/*
* TODO: If we ever get into a situation where every single instruction is generating a fault
* (eg, if an 8088 executes opcode 0xFF 0xFF, which is incorrectly routed to helpFault() instead
* of fnGRPUndefined()), the browser may hang because we're failing to yield often enough.
* This is likely because the thrown exceptions are taking MUCH longer than normal instructions,
* throwing off our burst calculations. We need to either adjust the burst or break out of the
* DO-WHILE loop on every exception.
*/
}
this.stepCPU(nCyclesPerBurst);
/*
* nBurstCycles, less any remaining nStepCycles, is how many cycles stepCPU() ACTUALLY ran (nCycles).