On Tue, 8 Mar 2016, Rich Alderson wrote:
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.
I got it from Jan deRie when I asked about it on a Youtube video[1]
showing the Panda Display in action. I'm trying to get it compiled
because I've made a new Panda Display board[2] that connects to a USB port
instead of a parallel port. The new board works, but the lights don't
light up as expected, so I need something that puts a recognizable pattern
on the display.
I'm doing this with Bob Armstrong's blessing, but I haven't asked him
about this program yet. I'll post to the Spare Times Gizmos list now.
[1] https://www.youtube.com/watch?v=g_LcQ5apODg
[2] https://github.com/DavidGriffith/panda-display
--
David Griffith
[email protected]
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