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- Newsgroups: comp.sys.cbm
- Path: sparky!uunet!cs.utexas.edu!milano!cactus.org!spacek
- From: spacek@cactus.org (Mark S. Spacek)
- Subject: Re: Mac <--> cbm
- Message-ID: <1992Aug16.034351.2070@cactus.org>
- Organization: Capital Area Central Texas UNIX Society, Austin, Tx
- References: <cdminter.713759082@icaen.uiowa.edu> <64084@cup.portal.com>
- Date: Sun, 16 Aug 1992 03:43:51 GMT
- Lines: 22
-
- In article <64084@cup.portal.com> JimC@cup.portal.com (Jim GEOS Collette) writes:
- >Nope, it's a hardware limitation - the 1581 uses industry-standard single
- >speed MFM drives (a la PC, Amiga, etc.) but the Mac uses variable speed GCR
- >drives which can't be read by anything else.
- >
- > Jim :)
- >
- Yup, its a hardware limitation, but can be done with a little added hardware.
- The Spectre GCR Mac emulator cartridge reads and writes Mac disks just fine
- using the standard 3 1/2 720k MFM drive that STs come with. The new Amax for
- the Amiga is supposed to be able to do the same thing. I'm not sure if its
- out yet. I imagine it could also be done with a 1581. It should be much
- easier with the new CMD 1.6 meg drive though. Mac Super drives are really
- just standard 1.44 meg drives with a slightly weird file structure and I would
- guess that the CMD 1.6 meg drive is also. Oh, in case you were wondering,
- the Spectre doesn't vary the speed to the drive motor to read/write Mac disks.
- Some early devices did it that way, but it doesn't. I'm not sure exactly what
- it does do, I'm really out of my depth here. I think I read that it varies
- the speed that the data stream to achive the results. Don't ask me to explain
- it because I can't, its just magic to me. If you really want to know, you
- could contact Dave Small or somebody at Gadgets by Small who make the Spectre
- GCR. Anyway, my 2 cents worth. Mark.... (spacek@cactus.org)
-