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Cleaned up checkStackLimit() processing, fixing some problems along the way (most notably, mode 6 references were not being checked)

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Jeff 2016-11-18 20:27:42 -08:00 • committed by Jeff Parsons
commit f1c0dce8ab
6 changed files with 538 additions and 517 deletions
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modules/pdp11/lib/defines.js
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@ -307,6 +307,7 @@ var PDP11 = {
WRITE: 0x04,
UPDATE: 0x06,
VIRT: 0x08, // getVirtualByMode() leaves bit 17 clear if this is set (otherwise the caller would have to clear it again)
PUSH: 0x10,
ISPACE: 0x00000,
DSPACE: 0x10000 // getVirtualByMode() sets bit 17 in any 16-bit virtual address that refers to D space (as opposed to I space)
},
@ -747,6 +748,7 @@ PDP11.ACCESS.WRITE_WORD = PDP11.ACCESS.WORD | PDP11.ACCESS.WRITE; // forme
PDP11.ACCESS.WRITE_BYTE = PDP11.ACCESS.BYTE | PDP11.ACCESS.WRITE; // formerly WRITE_MODE (4) | BYTE_MODE (1)
PDP11.ACCESS.UPDATE_WORD = PDP11.ACCESS.WORD | PDP11.ACCESS.UPDATE; // formerly MODIFY_WORD (2 | 4)
PDP11.ACCESS.UPDATE_BYTE = PDP11.ACCESS.BYTE | PDP11.ACCESS.UPDATE; // formerly MODIFY_BYTE (1 | 2 | 4)
PDP11.ACCESS.PUSH_WORD = PDP11.ACCESS.WORD | PDP11.ACCESS.WRITE | PDP11.ACCESS.PUSH;
/*
* PSW arithmetic flags are NOT stored directly into the PSW register; they are maintained across separate