From: David Griffith
Sent: Monday, March 07, 2016 11:53 PM
> Specifically I'm trying to build and run this:
> TITLE HACK
> SEARCH MONSYM
>
> HACK: SKIPA 4,[^D4]
> HACK0: SOJL 4,TRAILL
> SETZB 1,3
> HACK1: TLNE 1,777777
> JRST HACK0
> MOVE 2,1
> CIRC 2,-^D18
^^^^^^^^^^^^
...
> END HACK
> When I do COMPILE, LOAD, and SAVE on it and run the executable, I get this:
> $hack
> ?Illegal instruction 247100,,777756 at HACK1+3
> ?Undefined operation code
As well you should. There is no CIRC in the standard PDP-10 instruction set.
Opcode 247 is unassigned, so if someone defined CIRC locally (say, in an OPDEF,
although I don't see one here), the result you report would be precisely what
I would expect.
Where did this code come from? From the presence of the LITES% JSYS I infer
that it has something to do with Bob Armstrong's panel. Perhaps you should
direct a query in his direction? SpareTimeGizmos.com, and all that.
Rich
Rich Alderson
Vintage Computing Sr. Systems Engineer
Living Computer Museum
2245 1st Avenue S
Seattle, WA 98134
mailto:ri...@livingcomputermuseum.org
http://www.LivingComputerMuseum.org/
