From: jnc@mercury.lcs.mit.edu (Noel Chiappa)
Subject: [TUHS] PDP-11 questions
Date: Sun, 24 Jan 2016 13:56:15 -0500 (EST) [thread overview]
Message-ID: <20160124185615.B3E6618C0A8@mercury.lcs.mit.edu> (raw)
> The later M9301 (see disassembly of the contents here:
> http://ana-3.lcs.mit.edu/~jnc/tech/pdp11/M9301-YA.mac
> of one variant) didn't clear memory either
OK, so _my_ memory is failing! That code does in fact test the memory.
(Although, looking at it, I can't understand how it works; after writing the
contents of R3 into the memory section it it asked to test, it complements the
test value in R3, before comparing it with the memory it just wrote with R3,
to make sure they are the same. Maybe there's an error in the dis-assembly?)
Anyway, it should have left the memory mostly containing all 0's.
Noel
next reply other threads:[~2016-01-24 18:56 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-01-24 18:56 Noel Chiappa [this message]
-- strict thread matches above, loose matches on Subject: below --
2016-01-26 20:07 Doug McIlroy
2016-01-26 20:44 ` Clem Cole
2016-01-26 19:36 Doug McIlroy
2016-01-26 19:59 ` Warren Toomey
[not found] <mailman.29.1453684304.15972.tuhs@minnie.tuhs.org>
2016-01-25 3:07 ` Johnny Billquist
2016-01-25 3:09 ` Johnny Billquist
2016-01-25 12:54 ` John Cowan
2016-01-25 13:09 ` Johnny Billquist
2016-01-25 13:49 ` Johnny Billquist
2016-01-25 16:00 ` John Cowan
2016-01-25 16:17 ` Johnny Billquist
2016-01-25 16:43 ` John Cowan
2016-01-25 1:11 Noel Chiappa
2016-01-25 1:30 ` Clem cole
2016-01-24 22:40 Norman Wilson
2016-01-25 1:55 ` David Ritchie
2016-01-25 1:59 ` Ronald Natalie
2016-01-25 2:14 ` Clem cole
2016-01-25 11:29 ` Tony Finch
2016-01-25 13:25 ` Ronald Natalie
2016-01-25 16:18 ` Pete Turnbull
2016-01-25 19:37 ` Clem Cole
2016-01-24 22:40 Norman Wilson
2016-01-25 0:23 ` Ronald Natalie
[not found] <mailman.25.1453658502.15972.tuhs@minnie.tuhs.org>
2016-01-24 18:34 ` Johnny Billquist
2016-01-24 18:30 Noel Chiappa
2016-01-24 18:36 ` Ronald Natalie
2016-01-24 21:10 ` John Cowan
2016-01-25 0:11 ` scj
2016-01-25 0:36 ` Clem cole
2016-01-24 18:01 Noel Chiappa
2016-01-24 17:37 Mark Longridge
2016-01-24 18:49 ` Clem Cole
2016-01-25 3:16 ` Dave Horsfall
2016-01-25 5:32 ` Warren Toomey
2016-01-25 12:27 ` Clem cole
2016-01-25 13:38 ` Lawrence Stewart
2016-01-25 14:15 ` Clem Cole
2016-01-26 19:52 ` Dave Horsfall
2016-01-26 20:41 ` Clem Cole
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