Re: Apple II 3.5" Controller and SuperDrive problems...

[david@uow.edu.au (David Wilson)]

dempson@actrix.gen.nz (David Empson) writes:
>Can anyone else out there confirm that they have failed to get a UniDisk
>3.5 working on a UDC?  If so, can you please let us know which UDC
>version it was, and any other identifying characteristics.

My UDC works well with Apple 3.5, slowly with Mac 800K, not at all with
a UniDisk 3.5 and not at all with a Mac 400K (although that could have been
that the 400K drive was faulty).

The UDC is a small card with 2x 19pin D type connectors on 2 ribbon cables.

I disassembled the code to patch it so that 5.25" drives are treated as 40
track devices without patching ProDOS. Looking at the listing I only see
mention of DISK 5.25 and DISK 3.5 so if the UDC ever had support for the HD20
it was dropped by the time my card was built.
--
David Wilson  School of IT & CS, Uni of Wollongong, Australia  david@uow.edu.au