Re: Bringing a //c to life

[dempson@atlantis.actrix.gen.nz (David Empson)]

In article <3tedgu$1p6@murphy.servtech.com>,
John Morrissey <johnmorr@servtech.com> wrote:
> claudiak@well.sf.ca.us (Claudia Kulesh) wrote:
> 
> >drive working?  Look for a replacement internal drive (yikes!)?
> >While I'm asking all these questions -- I've got an external 3-1/2"
> >drive attached to a Mac512k for my neice.  Would that work on this
> >computer?  [Apple IIc]
> 
> I'm not absolutely sure if the Mac 512's drive will work.

It won't.  If the IIc has a new enough ROM version, it will support
the UniDisk 3.5, but the Mac's external (or internal) 3.5" drive is
not a UniDisk.

For the Mac 128 and 512, the drives are 400k, and aren't compatible
with any Apple II, except in the special case of a Central Point
Universal Disk Controller card (which can be used in the IIe and
possibly II+ and IIgs).  Even then, the vast majority of Apple II
3.5" disks are in 800k format, so won't be accessible with this drive.

Later Macs use the Apple 3.5 Drive (400k/800k) or SuperDrive
(400k/800k/720k/1.44MB).  The Apple 3.5 Drive can be used directly by
a IIc+ or IIgs, but not with a IIc.  They are supported by the
Universal Disk Controller in a II+/IIe, or by the Apple 3.5 Disk
Controller Card in a IIgs/enhanced IIe.  The PC Transporter can also
use this drive.

The SuperDrive will act exactly like an Apple 3.5 Drive (i.e. no
access to 1.44MB or 720k) unless connected to the Apple 3.5 Disk
Controller Card (also known as the "SuperDrive card").  It can only be
used to its full capabilities with this card in a IIgs or enhanced IIe.
-- 
David Empson
dempson@actrix.gen.nz
Snail mail: P.O. Box 27-103, Wellington, New Zealand