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From: smith@umn-cs.UUCP
Newsgroups: net.micro
Subject: Re: Re: Micro-Logic Analyzer - (nf)
Message-ID: <226@umn-cs.UUCP>
Date: Sun, 5-Jun-83 20:31:07 EDT
Article-I.D.: umn-cs.226
Posted: Sun Jun  5 20:31:07 1983
Date-Received: Tue, 7-Jun-83 20:48:43 EDT
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#R:ihnss:-151400:umn-cs:6900010:000:546
umn-cs!smith    Apr 26 09:39:00 1983

  I used to work for a company that did speech recognition work, and our
primary debugging tool for these dreadful programs was a scope driven by
an A/D converter.  All of your favorite bugs (overflow, underflow, etc)
showed up as spikes or other weird effects that contrasted against the
otherwise recognizable waveforms.

  I suspect this trick was first used on the Whirlwind I computer at
MIT, possibly in the late 1940s.  There's a photo of them using a scope
driven by the computer in the 1951 IRE (nee IEEE) conference preceedings.

Rick.