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Article #1654altering clock speed
From: k... Ken Yap
Date: Wed, 28 Feb 1990 17:16
Date: Wed, 28 Feb 1990 17:16
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This is marginally computer related but... When the first cheap LSI based calculators came out, I opened one up to look at the circuit. Invariably the clock is provided by an on-chip oscillator with external R and C. I decided to increase the capacitance drastically to see what would happen. Since the clock controls everything including keyboard scanning, output display and internal operation, it was quite amusing to watch the calculator take half a second to react to a keypress, take several seconds to do a multiplication, and finally shift the result into the display, digit by digit. I almost felt that if I slowed the clock rate more and opened up the chip I would see the electrons in flight. :-)
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Path: mbox-mo1.pugleaf.net!gmdzi!unido!mcsun!uunet!shelby!apple!mips!zaphod.mps.ohio-state.edu!wuarchive!udel!rochester!ken From: k...@cs.rochester.edu (Ken Yap) Newsgroups: alt.folklore.computers Subject: altering clock speed Message-ID: <1990Feb28.171620.14225@cs.rochester.edu> Date: 28 Feb 90 17:16:20 GMT Reply-To: k...@cs.rochester.edu Organization: University of Rochester Computer Science Department Lines: 12 Posted: Wed Feb 28 18:16:20 1990 Address: Rochester, NY 14627, (716) 275-1448 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit