Re: Apple UniDisk 3.5 vs. Apple 3.5

[david@wraith.cs.uow.edu.au (David E A Wilson)]

spec@vax2.concordia.ca (Mitchell Spector) writes:
>In article shack@deimos.frii.com (Randy Shackelford) writes...
>>2. beige, colored Apple logo, no eject button, no daisychain port on the
>>   back -> 800K Mac external, incompatible with IIs

>    Both of the above drives (Macintosh 400K and 800K Drive) will work
>with an Apple II Plus, IIe and IIgs if connected to a VTech UDC card
>(Universal Disk Controller). As well, they should work with Laser 128
>models EX and EX/2, which have the equivalent of the UDC built-in.

I can confirm that the Mac 800K drive works on a UDC card in an Apple //e
but it is not pleasant to use - it is very slow (it sounds like it does
a seek for every block read rather than for every track). I never got a
Mac 400K drive to work on my UDC (despite the ROM having code to support
400K drives).

P.S. As I have 3rd party 40 track 5.25" drives (one of which is plugged
into the UDC) I patched the UDC EPROM to give me a genuine 40 track 5.25
driver with ProDOS and Pascal 1.3 support.
-- 
David Wilson	Dept CompSci Uni Wollongong Australia	david@cs.uow.edu.au