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From: dillon@CORY.BERKELEY.EDU (Matt Dillon)
Newsgroups: comp.sys.amiga
Subject: Re: Reading MacDisks on Amiga
Message-ID: <8705080543.AA18112@cory.Berkeley.EDU>
Date: Fri, 8-May-87 01:43:36 EDT
Article-I.D.: cory.8705080543.AA18112
Posted: Fri May  8 01:43:36 1987
Date-Received: Sat, 9-May-87 16:43:03 EDT
Sender: daemon@ucbvax.BERKELEY.EDU
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<I've read several people who stated that, since the Mac drives spin
<at variable rates and the Amiga drives at fixed rates, that it was not
<possible to read Mac Disks with the Amiga drive.
<   Well...  one way to get around this is to read in data faster or
<slower, depending on what track you are on.  This is how the Commodore
<1541 drives manage to squeeze 170k on a single density 5 1/4" disk, putting
<more sectors on the outer tracks of a disk and reading the bits at a faster
<rate (the drive spins at a constant 300 rpm).
<   So, a program to read Mac disks on an Amiga seems not-impossible-- I
<would try to write such a beast, but don't yet even have a C-compiler
<for my 'miga.

<   Am I missing something?

	Yes.  The 1541's firmware has access to a hardware IO register which 
allows it to select the speed.  No such register exists on the Amiga.  
Still... has anyone *tried* raw-reading mac disks??? I assume the Mac drive 
doesn't spin any faster than then 300rpm, which means you *might* be able
to decipher the data the Amiga would spew at you.

					-Matt