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Fixed a double-trap MMU bug (both src and dst operands triggered a trap, but since the latter was an abort, the former needed to be ignored)

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Jeff 2016-11-17 16:21:13 -08:00 • committed by Jeff Parsons
commit 05c2f0ebfe
4 changed files with 47 additions and 37 deletions
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5
modules/pdp11/lib/defines.js
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@ -360,9 +360,10 @@ var PDP11 = {
RW1: 0x4, // read/write, memory management trap upon completion of a read or write
RW2: 0x5, // read/write, memory management trap upon completion of a write (11/70 only)
RW: 0x6, // read/write, no system trap/abort action
U2: 0x7 // unused, abort all accesses--reserved for future use
U2: 0x7, // unused, abort all accesses--reserved for future use
MASK: 0x7
},
ED: 0x0080, // expansion direction (if set, the page expands downward from block number 127)
ED: 0x0008, // expansion direction (if set, the page expands downward from block number 127)
UNUSED: 0x0030,
MODIFIED: 0x0040, // page has been written (bit cleared when either PDR or PAR is written)
ACCESSED: 0x0080, // page has been accessed (bit cleared when either PDR or PAR is written) (11/70 only)