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From: tes@whuts.UUCP
Newsgroups: comp.sys.ibm.pc
Subject: Re: Why 4.77MHz on clones?
Message-ID: <1326@whuts.UUCP>
Date: Thu, 29-Jan-87 19:56:45 EST
Article-I.D.: whuts.1326
Posted: Thu Jan 29 19:56:45 1987
Date-Received: Sat, 31-Jan-87 02:08:21 EST
References: <1292@ho95e.ATT.COM> <5426@amdahl.UUCP>
Distribution: na
Organization: AT&T Bell Laboratories
Lines: 16
Summary: you will not believe this......

> 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?
The PCDOS copy, backup, restore, commands actually fail at speeds
other than 4.77.  I did not believe this when I installed my Fast88
at 7.4.  (Excellent product, excellent documentation, very cheap
*real* improvement w/o need for slot).  The Documentation said
that the switch on the Fast88 was to allow these programs to run
at 4.77.  Non-Microsoft/IBM copy programs do not have these
problems, proving stupid S/W, not H/W as the problem.
-- 
    -----                   Terry Sterkel
  -====----            AT&T Bell Laboratories
  ---------    {harvard|allegra|ulysses|ihnp4}!whuts!tes
    -----         [opinions are obviously only my own]