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Fixed the memory clear "toggle-in", by returning the correct amount of installed RAM, and passing properly masked addresses to all the I/O handlers

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Jeff 2016-11-04 17:09:50 -07:00 • committed by Jeff Parsons
commit 0cf11c0b01
8 changed files with 605 additions and 511 deletions
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18
devices/pdp11/machine/1170/panel/debugger/README.md
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@ -186,7 +186,7 @@ If you also want to see all the hardware register activity, use the Debugger's "
17772262 021311 CMP (R3),(R1) ; Top of Memory?
17772264 003402 BLE 2$
17772266 005000 CLR R0 ; Start at Virtual Address 0
17772270 000776 BR 1$
17772270 000766 BR 1$ ; [NOTE: DEC's guide incorrecly lists this opcode as 000776 --@jeffpar]
17772272 005312 2$: DEC (R2) ; Disable Relocation
17772274 000000 HLT
@ -208,7 +208,7 @@ The above "toggle-in" can be entered with the PDPjs Debugger as follows:
e 17777706 177676;
e 17777776 000000;
e 17772240 012714 000020 005212 010520 020027 017776 003774 062711;
e 17772260 000200 021311 003402 005000 000776 005312 000000;
e 17772260 000200 021311 003402 005000 000766 005312 000000;
r pc 172240
which should produce the following results when Bus messages are turned on ("m bus on"):
@ -268,7 +268,7 @@ which should produce the following results when Bus messages are turned on ("m b
SIPAR6.writeWord(00017772254,003774)
changing 00017772256 to 062711
SIPAR7.writeWord(00017772256,062711)
>> e 17772260 000200 021311 003402 005000 000776 005312 000000
>> e 17772260 000200 021311 003402 005000 000766 005312 000000
changing 00017772260 to 000200
SDPAR0.writeWord(00017772260,000200)
changing 00017772262 to 021311
@ -277,8 +277,8 @@ which should produce the following results when Bus messages are turned on ("m b
SDPAR2.writeWord(00017772264,003402)
changing 00017772266 to 005000
SDPAR3.writeWord(00017772266,005000)
changing 00017772270 to 000776
SDPAR4.writeWord(00017772270,000776)
changing 00017772270 to 000766
SDPAR4.writeWord(00017772270,000766)
changing 00017772272 to 005312
SDPAR5.writeWord(00017772272,005312)
changing 00017772274 to 000000
@ -309,3 +309,11 @@ As the **Maintenance Service Guide** goes on to say:
Before running the above code, you should turn Bus messages off (ie, "m bus off"); otherwise, the quantity of messages will
slow execution to a crawl.
If you want to set an execution breakpoint in the above code, make sure you use the appropriate virtual (16-bit) address,
not one of the physical (22-bit) addresses shown above. For example, to break on this instruction:
17772256 062711 ADD #200,(R1) ; Step Page
use the command "bp 172256", because while the code *is* physically located at 17772256, it is being executed at virtual
address 172256, and execution breakpoints operate on virtual addresses.