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From: saj@iuvax.UUCP
Newsgroups: net.lang
Subject: Re: Re: Self-modifying code and CDC Fort - (nf)
Message-ID: <118@iuvax.UUCP>
Date: Wed, 15-Feb-84 15:11:25 EST
Article-I.D.: iuvax.118
Posted: Wed Feb 15 15:11:25 1984
Date-Received: Thu, 16-Feb-84 06:07:01 EST
Sender: saj@iuvax.UUCP
Organization: Indiana U, Bloomington
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#R:azure:-248800:iuvax:11800010:000:472
iuvax!apratt    Jan 12 20:59:00 1984

You better believe there were some COMPASS hacks (CDC assembly code) who took
advantage of the "bug" you mention -- once a word is in cache, you can modify
it.  It would be just like one fellow I know to do that. His loops always
(well, almost always) fit in 15 words (I think that was the number), and he
never wasted the 15 bits which a jump instruction at the beginning of a word
wastes. Talk about slick, tight code!			-- Allan Pratt
					...ihnp4!inuxc!iuvax!apratt