Apple 2c Variants

["Leslie Ayling" <layling@intercoast.com.au>]

Hi all,

Just a quick question about the different varieties of Apple 2c's.

Not counting the 2cplus, what are the *physical* differences in
the various 2c machines between those that support the UNIDISK,
and those that don't?

Is it simply a ROM upgrade to support the UNIDISK 3.5, or are there
some other hardware differences involved?

Has anyone managed to get the Apple3.5 drive (from a GS for example)
working on the 2c with an appropriate driver? Or is there a 2c variety
that supports it out of the box?

Many thanks in advance,
Leslie