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From: info-mac@uw-beaver
Newsgroups: fa.info-mac
Subject: Re: am I missing something?
Message-ID: <550@uw-beaver>
Date: Fri, 25-Jan-85 06:11:40 EST
Article-I.D.: uw-beave.550
Posted: Fri Jan 25 06:11:40 1985
Date-Received: Mon, 28-Jan-85 06:33:59 EST
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Organization: U of Washington Computer Science
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From: Thomas.Newton@cmu-cs-spice.arpa

I think the Mac is set up in a way similar to the Atari 800.  On the Atari,
the 6502 is run at 1.8 MHz, but the display hardware steals enough cycles to
make the effective rate ~ 1 MHz when running in text mode or 320 by 192 mode.

I believe the Lisa 1 ran at a clock speed of 5 MHz, so that it could use the
same trick as the Apple //.

                                        -- Thomas.Newton@cmu-cs-spice.ARPA