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From: pozar@hoptoad.UUCP
Newsgroups: comp.sys.ibm.pc
Subject: Re: Why 4.77MHz on clones?
Message-ID: <1696@hoptoad.uucp>
Date: Fri, 30-Jan-87 17:34:55 EST
Article-I.D.: hoptoad.1696
Posted: Fri Jan 30 17:34:55 1987
Date-Received: Tue, 3-Feb-87 02:46:34 EST
References: <1292@ho95e.ATT.COM> <5426@amdahl.UUCP> <1326@whuts.UUCP>
Reply-To: pozar@hoptoad.UUCP (Tim Pozar)
Distribution: na
Organization: Syncstream (San Francisco)
Lines: 18

> 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.

-- 
        Tim Pozar
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