Re: Why 4.77MHz on clones?

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Article #15559

#15559

From: goldy
Date: Wed, 04 Feb 1987 17:31

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In article <1696@hoptoad.uucp>, pozar@hoptoad.UUCP writes:
> > In article <1292@ho95e.ATT.COM>, wcs@ho95e.ATT.COM (#Bill.Stewart) writes:
> > > A lot of PC clones offer two speeds, 4.77 and 7.x or 8.0 MHz, and claim
> > > the 4.77 is for compatibility.  What is the compatibility problem?
> > > Add-on hardware?  Stupid copy-protection?  Do I need to care?
> 
> Side_note: Ever wonder why 4.77 was picked?   The 8088 bus was designed 
> around the Multi-bus specs.  As I remember 4.77 or some mutilple was use
> on the Multi-bus for timeing.
> 

Ever try playing some of the games like DIGGER or PACMAN or STARGATE
at double or faster speeds???

That's why you need to be able to slow the machines down!

Mark H. Goldberg
..ihnp4!hound!goldy

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Message-ID: <1940@hound.UUCP>

Path: arc1-ca.pugleaf.net!utzoo!watmath!clyde!burl!codas!mtune!mtuxo!houxm!hound!goldy

References: <1292@ho95e.ATT.COM> <5426@amdahl.UUCP> <1326@whuts.UUCP> <1696@hoptoad.uucp>

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Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Path: arc1-ca.pugleaf.net!utzoo!watmath!clyde!burl!codas!mtune!mtuxo!houxm!hound!goldy
From: goldy@hound.UUCP
Newsgroups: comp.sys.ibm.pc
Subject: Re: Why 4.77MHz on clones?
Message-ID: <1940@hound.UUCP>
Date: Wed, 4-Feb-87 12:31:56 EST
Article-I.D.: hound.1940
Posted: Wed Feb  4 12:31:56 1987
Date-Received: Sat, 7-Feb-87 11:15:32 EST
References: <1292@ho95e.ATT.COM> <5426@amdahl.UUCP> <1326@whuts.UUCP> <1696@hoptoad.uucp>
Distribution: na
Organization: AT&T Bell Laboratories, Holmdel
Lines: 18
Summary: Try the more practical reason: GAMES!!!!

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