Re: UniDisk and SE/30 Driver

[nathan@visi.com (Nathan Mates)]

In article <AE4F3C94-C9508@198.161.156.43>,
Octavian Micro Development <octavian@agt.net> wrote:
>I am so shocked that there is an alive Apple // user community...

   [Don't be so shocked; we hate dealing with the paperwork when
deaths are involved]

>That said, has anyone written a driver for the 5 1/4" UniDisk on a Mac?
>I know it is possible.

    The only drivers (and the only supported way of connecting an
Apple 5.25" drive (the unidisk is the old 3.5" drive)) are for 5.25"
drives connected to a //e card in certain (LC, LC II, LC III, some
performas) Macs. As the Apple II 5.25" format requires _exact_ timing
and logic, only with the special hardware on the card can they be
successfully connected. You'd have to lock out all interrupts when
accessing the disk, and then sit in a precisely coded and speed
calibrated loop.

   It is possible to physically connect such a drive to the mac. I'm
pretty sure that extra hardware is needed before you can get around
to even thinking of writing a driver.

Nathan Mates
--
<*> Nathan Mates http://www.visi.com/~nathan/      <*>
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