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Updated PDP-11 Debugger to include line breaks between steps

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This commit is contained in:
Jeff Parsons 2017-01-24 14:36:15 -08:00 • committed by Jeff Parsons
commit 4611153625
49 changed files with 13887 additions and 47 deletions
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8
modules/pdp11/lib/cpuops.js
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@ -49,7 +49,7 @@ if (NODE) {
* with a switch statement).
*
* Eventually, every opcode should end up either in an opXXX() function or opUndefined(). For
* opcodes that perform a simple read and/or write operation, the entire operation is handled by
* opcodes that perform a simple read or write operation, the entire operation is handled by
* the opXXX() function. For opcodes that perform a more extensive read/modify/write operation
* (also known as an update operation), those opXXX() functions usually rely on a corresponding
* fnXXX() helper function.
@ -1455,13 +1455,11 @@ PDP11.opMUL = function(opCode)
{
var src = this.readDstWord(opCode);
var reg = (opCode >> 6) & 7;
if (src & 0x8000) src |= ~0xffff;
var dst = this.regsGen[reg];
if (dst & 0x8000) dst |= ~0xffff;
var result = ~~(src * dst);
var result = ((src << 16) >> 16) * ((dst << 16) >> 16);
this.regsGen[reg] = (result >> 16) & 0xffff;
this.regsGen[reg | 1] = result & 0xffff;
this.updateMulFlags(result);
this.updateMulFlags(result|0);
this.nStepCycles -= (22 + 1);
};