Re: Apple II 3.5 Drives

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

Erik Anderson <white-no-spam-fox@gte.net> wrote:

> On a related note, I have an Appe //c at home. This past week, I was
> perusing an "antique" shop and came across a section with three (3)
> external Apple 3.5" drives. On the bottom, they all said 800K.

That isn't enough information.  What model number and what is the exact
name given on the label?

The drive you need for a IIc is called a "UniDisk 3.5", model number
A2M2053.

I suspect what you have found is a Macintosh external 800K drive (M0106,
if I remember right).  This will not work on the IIc.

Assuming you find a UniDisk 3.5, all you need is a firmware version in
the IIc which supports it.

To check this, get into BASIC and type PRINT PEEK(64447).  If the number
printed is 255, you need a ROM upgrade to use the UniDisk 3.5.  If the
number is 0, 3 or 4 then you are OK.

-- 
David Empson
dempson@actrix.gen.nz
Snail mail: P.O. Box 27-103, Wellington, New Zealand