Multi-punches on IBM 026

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#1093

From: Jeremy J. Epstein
Date: Mon, 22 Jan 1990 15:26

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Back in the bad old days, I keypunched all my programs on IBM 026
card punches.  [The first time I saw an 029 I was overwhelmed with
how modern it was]

Does anyone out there remember the multi-punch sequences for the
characters which weren't on the keyboard (no cheating by looking at
old card decks)?  I think that "+" was 12-6-8, but I'm not sure.  I don't
even remember what characters had to be multipunched besides +, (, )

Also, on IBM 360s (and hence on all 370 architecture systems) the
op code for multiply was 5C, which was also the EBCDIC for '*'.
Does anyone know if that was accidental, or coincidence?  Do other
machines have neat opcodes like that?  It sure helped in debugging
programs 'cause you could look in the ASCII dump for your multiply
instructions, and then find everything else relatively quickly...
-- 
Jeremy Epstein
TRW Systems Division
703-876-4202
j...@virtech.uu.net

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Message-ID: <1990Jan22.152652.7636@virtech.uucp>

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Path: mbox-mo1.pugleaf.net!gmdzi!unido!mcsun!uunet!virtech!jje
From: jje@virtech.uucp (Jeremy J. Epstein)
Newsgroups: alt.folklore.computers
Subject: Multi-punches on IBM 026
Keywords: 12-6-8?
Message-ID: <1990Jan22.152652.7636@virtech.uucp>
Date: 22 Jan 90 15:26:52 GMT
Organization: Virtual Technologies Inc.
Lines: 20
Posted: Mon Jan 22 16:26:52 1990
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