On Feb 27, 2:20=A0pm, Steven Hirsch  wrote:
> AppleCPM wrote:
> > Hi, y'all!
>
> > =A0 =A0 As long as we're discussing the UDC, I thought I'd see if I cou=
ld
> > clear up some of my confusion about the card. =A0I've had one for quite
> > some time but have been reluctant to test it because I don't know what
> > drives can be connected to it. =A0I did just visit the A2Wiki and see
> > that I can't use it with a 3.5 inch Unidisk drive. =A0My understanding
> > is that you can use up to four drives with the card and that they can
> > be either 5.25 inch or 3.5 inch drives. =A0Do they need to be in any
> > particular order? =A0Will a 1.44 MB drive work with the card? =A0How ab=
out
> > early Mac drives like the M0130 (I think that's the model number)?
>
> There are two firmware versions that I'm aware of. =A0One of them support=
s the
> Unidisk 3.5 and the other supports the newer 3.5" drive (no internal
> controller). =A0They are mutually exclusive.

And one of the firmwares definitely supports the single-sided 400k 3.5
inch Mac drives. I can remember the early ads for the UDC suggesting
you could get these now abandoned drives for a song and then use them
with your Apple II.

-Warr
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