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From: q4kx@vax5.cit.cornell.edu (Joel Sumner)
Newsgroups: comp.sys.apple2
Subject: Re: 3.5" Drive Pricing
Message-ID: <4021.264017d3@vax5.cit.cornell.edu>
Date: 3 May 90 15:36:51 GMT
References: <9005020357.AA13529@apple.com>
Distribution: comp
Lines: 25

In article <9005020357.AA13529@apple.com>, V2071A@VM.TEMPLE.EDU ("George A. Piotrowski Jr") writes:
>>
>>Remember that Apple Drives (3.5 and Unidisk) can spin the disk at different
>>speeds.  This allows the Apple disks to hold 800K instead of 720K by allowing
>>more sectors on the outer tracks but slowing the disk rotation speed.  IBM
>>drives don't have the hardware for variable speeds.
>>
> 
>       Central Point Software sells (at least sold) a card for IBM and
> clones that is called the CPS Drive Option Board.  You plug this card in your
> computer, connect your drive cable from you interface card to this card, and
> run the cable from the CPS board to your 3.5" drive.  This card along with
> the included software lets you take directories of Mac disks and copy from and
> to Mac disks.  I have this card installed in a Zenith PC at my Computer Center
> and it works fine.

Sure.  By adding the CPS Drive Option board, you are adding the necessary
hardware to tell the drive to do multiple speeds to read HFS/ProDOS disks.  I
just doubt that  the IBM drives ALONE can do the multiple speeds.
-- 
Joel Sumner                     GENIE:JOEL.SUMNER     These opinions are 
q4kx@cornella.ccs.cornell.edu   q4kx@cornella         warranted for 90 days or
q4kx@vax5.cit.cornell.edu       q4kx@crnlvax5         60,000 miles.  Whichever
....................................................  comes first.
Never test for an error condition that you can't handle.