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Path: utzoo!linus!decvax!dartvax!dalcs!holmes
From: holmes@dalcs.UUCP (Ray Holmes)
Newsgroups: net.lang
Subject: Re: Re: Self-modifying code and CDC Fort - (nf)
Message-ID: <328@dalcs.UUCP>
Date: Sat, 14-Jan-84 12:45:26 EST
Article-I.D.: dalcs.328
Posted: Sat Jan 14 12:45:26 1984
Date-Received: Sun, 15-Jan-84 06:12:20 EST
References: <1375@pur-ee.UUCP>
Organization: Dalhousie U, Halifax N.S.
Lines: 10

[]
	I used to show people (CDC hackers) a short routine (about
eight lines) and ask what was in the registers after it stopped. No
one ever got the right answer as it consisted of a self modifying
loop that depended on this "bug" to actually loop almost twice as
many times as the code sugested.  This caused several interactive
debugging programs to get the same (incorrect) answers as people did.

					R