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README tweak

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Jeff 2016-11-03 18:55:43 -07:00 • committed by Jeff Parsons
commit 93c6ce7236
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11
devices/pdp11/machine/1170/panel/debugger/README.md
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@ -299,12 +299,13 @@ RAM.
As the **Maintenance Service Guide** goes on to say:
The program should halt when all of memory is cleared. If it doesn't halt, examine the CPU error, Memory system error
and HI/LO error address registers to determine the cause. Trap catchers can be used by depositing 200 in KIPAR 0 (17772340)
instead of zero, and setting up vector locations with their address + 2 and the Vector + 2 with a 0 (halt).
The program should halt when all of memory is cleared. If it doesn't halt, examine the CPU error,
Memory system error and HI/LO error address registers to determine the cause. Trap catchers can be
used by depositing 200 in KIPAR 0 (17772340) instead of zero, and setting up vector locations with
their address + 2 and the Vector + 2 with a 0 (halt).
Note: When loading the program you must be in console physical [i.e., the ADDRESS select switch must be set to "CONS PHY",
which is the default setting of the PDPjs Front Panel].
Note: When loading the program you must be in console physical [i.e., the ADDRESS select switch
must be set to "CONS PHY", which is the default setting of the PDPjs Front Panel].
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.