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Updated PDP-11/70 machines, and fixed a regression with MMR2 updates

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This commit is contained in:
Jeff Parsons 2017-02-09 09:07:53 -08:00 • committed by Jeff Parsons
commit d816497336
7 changed files with 50 additions and 18 deletions
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14
modules/pdp11/lib/cpustate.js
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@ -505,8 +505,13 @@ class CPUStatePDP11 extends CPUPDP11 {
/*
* If updates to MMR1 have not been shut off (ie, MMR0.ABORT bits are clear), then we are allowed
* to sync MMR1 with its real-time counterpart in opLast.
*
* UPDATE: Apparently, I was mistaken that this register would only be updated when the MMR0 ENABLED
* bit was set.
*
* if ((this.regMMR0 & (PDP11.MMR0.ABORT | PDP11.MMR0.ENABLED)) == PDP11.MMR0.ENABLED)
*/
if ((this.regMMR0 & (PDP11.MMR0.ABORT | PDP11.MMR0.ENABLED)) == PDP11.MMR0.ENABLED) {
if (!(this.regMMR0 & PDP11.MMR0.ABORT)) {
this.regMMR1 = (this.opLast >> 16) & 0xffff;
}
var result = this.regMMR1;
@ -527,8 +532,13 @@ class CPUStatePDP11 extends CPUPDP11 {
/*
* If updates to MMR2 have not been shut off (ie, MMR0.ABORT bits are clear), then we are allowed
* to sync MMR2 with its real-time counterpart in opLast.
*
* UPDATE: Apparently, I was mistaken that this register would only be updated when the MMR0 ENABLED
* bit was set.
*
* if ((this.regMMR0 & (PDP11.MMR0.ABORT | PDP11.MMR0.ENABLED)) == PDP11.MMR0.ENABLED)
*/
if ((this.regMMR0 & (PDP11.MMR0.ABORT | PDP11.MMR0.ENABLED)) == PDP11.MMR0.ENABLED) {
if (!(this.regMMR0 & PDP11.MMR0.ABORT)) {
this.regMMR2 = this.opLast & 0xffff;
}
return this.regMMR2;