Re: How many 5.25 inch floppies with the IIc support

[Mike <mike@bogus.address.net>]

David Empson wrote:

> You can update the firmware to the version which supports the UniDisk
> 3.5.  Your other IIc has the right firmware (FBBF = 00), so you can copy
> the ROM from this machine.
> 
> You need a 27C256 EPROM (32Kx8).  Installing it in the older IIc
> requires two minor modifications to the motherboard: a track cut and a
> solder blob.  Both are near the ROM, and are clearly marked.

Actually, an A2S4000 IIc may not have the electronics for controlling the 
Unidisk.  There is a page here that describes the modifications necessary:

http://www.apple2.org.za/gswv/USA2WUG/FOUNDING.MEMBERS/HOME.PAGES/HANK/hl.A2c.article1.html

and, for those who's newsreaders/servers chew that up:
http://www.apple2.org.za/gswv/USA2WUG/FOUNDING.MEMBERS
/HOME.PAGES/HANK/hl.A2c.article1.html

I think that it's a bit had to perform if you need to install the 
resistors, LM311 and NE555.

Mike