23 Dec
2015
23 Dec
'15
10:14 p.m.
On 23 December 2015 at 13:44, CLASystems <clasystems at gmail.com> wrote:
Ironically, the shortest and fastest seems to be
avoidance of the MQ
altogether [thus making it work on ANY model].
TAD ARGONE
AND ARGTWO
CLL RAL
CIA
TAD ARGONE
DCA ARGTWO
This works because .XOR. is addition ignoring the carry bits. So, knowing
they will happen, just allow them at first, then remove them.
Hmm, I just tried that in SIMH, and that doesn't XOR at all. I haven't
a clue what it does.
What I have entered:
sim> ie -m 100-105
100: TAD 76
101: AND 77
102: CLL RAL
103: CIA
104: TAD 76
105: DCA 77
Locations 076 and 077 being ARGONE and ARGTWO respectively, at the start:
sim> ie 076-077
76: 1234
77: 4321
After running the above code sample:
sim> ie 076-077
76: 1234
77: 0574
If we "flip" ARGONE and ARGTWO's values (to 4321 and 1234 respectively):
sim> ie 076-077
76: 4321
77: 3661
Neither of those is the expected 5115 of an XOR operation.
Am I missing something blindingly obvious?
Cheers,
Christian
--
Christian M. Gauger-Cosgrove
STCKON08DS0
Contact information available upon request.