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From: jeffh@HyperMail.apple.com (Jeff Holcomb)
Newsgroups: comp.sys.apple2
Subject: Re: MS-DOS
Message-ID: <11873@goofy.Apple.COM>
Date: 28 Jan 91 17:50:14 GMT
Sender: usenet@Apple.COM
Organization: Apple Computer, Inc.
Lines: 23
References:<7240@crash.cts.com> <11618@darkstar.ucsc.edu>

In article <11618@darkstar.ucsc.edu> unknown@ucscb.UCSC.EDU (The Unknown 
User) writes:
>         It doesn't actually read/write MFM.. It's simply a "pseudo" 
MS-DOS.

This isn't true.  The Apple 3.5" drive (platinum colored) can read/write 
disks both in GCR and MFM formats.  The IWM drive controller chip that is 
in the IIgs on the other hand can _only_ r/w GCR format.  The PCT has a 
SWIM drive controller chip on it, so that when the Apple 3.5" drive (or 
AE's drive) is plugged directly into the PCT, it can r/w both formats.  
The SWIM chip also allows adding a 360k 5.25" MFM drive to the PCT to r/w 
ordinary MS-DOS disks.

How do I know this?  I worked at AE in the past.

___________________________________________________________________________
Jeff Holcomb                 Internet: jeffh@HyperMail.apple.com
                            AppleLink: jeffh@HyperMail.apple.com@INTERNET#
                                GEnie: A2.JEFFH
Contracting for Apple ATG       Voice: (408) 974-0841

         My opinions are not necessarily those of Apple.  :-P
___________________________________________________________________________