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- From: newton@monty.apana.org.au (Mark Newton)
- Newsgroups: comp.os.linux
- Distribution: world
- Subject: Re: Macintosh format disks
- References: <1992Dec08.003511.17654@rs6000.cmp.ilstu.edu>
- Message-ID: <9212204752@monty.apana.org.au>
- Organization: APANA South Australia - State mail hub
- Date: Sun, 20 Dec 92 12:58:10 +1030
- Lines: 37
-
- jliddle@rs6000.cmp.ilstu.edu (Jean Liddle) writes:
- > In article <1992Dec7.225330.10418@news.columbia.edu> jml12@cunixa.cc.columbia.edu (Jonathan M Lennox) writes:
- > > I would be very surprised if Linux could be made to read Mac 400k or
- > >800k floppies, as the low-level layout of the disks is different, and
- > >I don't think PC hardware could read it. The 1440k floppies would be
- > >the only possibility. (Conceivably, I suppose, the SCSI drivers could
- >
- > How different are mac disks (formatwise) really? FDFORMAT for MSDOG can
- > format and read 400k and 800k floppies, as well as 1.72 MB HD floppies.
- > Theoretically, linux should be able to do the same, with probably a great
- > deal more eligance than FDFORMAT/DOS.
-
- You'll need new hardware.
-
- The rotation speed of Mac disks changes, depending on how far the head
- is from the centre of the disk. Unfortunately, most standard PeeCee
- disk hardware doesn't have any means of controlling the speed of revolution.
-
- The designers of the Mac emulator for the Amiga ran up against this
- problem. At first they "solved" it by supplying an interface to plug
- a real Mac drive into, but that wasn't a very good solution ('cos Mac
- drives have that multicoloured Apple on 'em, so they're expensive!).
- In the second release of the emulator, they supplied a card which varied
- the speed of the floppy drives by stepping the motor at varying rates
- (Pulse, pulse, pulse...). Yukko.
-
- > Now understanding the macintosh
- > file system might be a bit more tricky ... :)
-
- Yes!
-
- - mark
-
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- "Do not worry about an infinite newton@monty.apana.org.au
- supply of gibbons..." - Al Dearle Mark Newton
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