8 Mar
2016
8 Mar
'16
7:12 p.m.
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:RichA at LivingComputerMuseum.org
http://www.LivingComputerMuseum.org/