Path: utzoo!utgpu!water!watmath!clyde!att!osu-cis!tut.cis.ohio-state.edu!mailrus!ames!lll-tis!helios.ee.lbl.gov!nosc!ucsd!ucsdhub!hp-sdd!hplabs!hpda!hpcuhb!hpindda!mintz
From: mintz@hpindda.HP.COM (Ken Mintz)
Newsgroups: comp.sys.ibm.pc
Subject: HELP; Apple II i/o on AT?
Message-ID: <4330104@hpindda.HP.COM>
Date: 30 Aug 88 16:53:29 GMT
Organization: HP Information Networks, Cupertino, CA
Lines: 16

Is it feasible to write a disk driver to read (and preferrably
write) Apple II (GS?) disks on an AT compatible?  Does anyone know
of source and/or binary for one that might already exist?  Does
anyone know where I can get specs on the Apple 5.25-inch disk format?

I only have a HD drive on my AT.  Would I need a 360K drive?

Ordinarily, I wouldn't expect it to be a problem, once I get the
specs.  But I seem to recall reading that Wozniak's original disk
format relied on a variable-speed drive.  (Right?  Something like
he maintained constant linear velocity ... bit density ... whereas
drives today maintain constant angular velocity.)  Anyway, for
whatever reason, I thought it required h/w to read original Apple
disk.  Is that still the case?

Ken Mintz