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- Newsgroups: alt.emulators.ibmpc.apple2
- Path: sparky!uunet!think.com!spool.mu.edu!umn.edu!umeecs!emunix.emich.edu!grover
- From: grover@emunix.emich.edu (Grover Thomas)
- Subject: Re: Reading Apple disks in IBM drive (was Re: Does anyone know of...)
- Message-ID: <1992Dec21.162540.16813@zip.eecs.umich.edu>
- Sender: news@zip.eecs.umich.edu (Mr. News)
- Organization: Eastern Michigan University
- References: <2277@newsserver.cs.uwindsor.ca> <1992Dec20.223620.3809@zip.eecs.umich.edu> <102805@netnews.upenn.edu>
- Date: Mon, 21 Dec 1992 16:25:40 GMT
- Lines: 26
-
- In article <102805@netnews.upenn.edu> lginzb@ccat.sas.upenn.edu (Lionel Ginzburg) writes:
- >I think it would be possible to read Apple *3.5* inch disks in IBM
- >drives, but if my memories of the Apple are correct, it shouldn't be
- >possible to read 5.25 disks directly.
-
- Hmm, I think this is backwards... Apple 5.25" 140K disk drives spin
- at the standard 300 rev/sec.
- The more recent 800K 3.5" Apple disks have variable speed drives and
- cannot be read by regular IBM equipment (however, they do work dandy
- in a Mac).
-
- >I don't think it's a speed thing. It's possible to play with speed--
- >Atari disks rotated at 288rpm when correctly calibrated. Apple disks
- >weren't TOO far off from that. And we must consider that DOS 3.1 for
- >the Apple was written by the same people who wrote DOS 2.0 on the Atari.
-
- I don't know, but the variable-speed in the Apple (II & Mac) 3.5" disks
- does make them impossible to read in an IBM drive.
- Since the 5.25" disks spin at a constant rate, the only problem I can
- see is getting enough control over the IBM drive to read (and translate)
- the foreign sector patterns.
- --
- __ __
- (__) Grover Thomas InterNet: grover@emunix.emich.edu (__⌐
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