Re: Apple UniDisk 3.5 vs. Apple 3.5

[dempson@actrix.gen.nz (David Empson)]

Mitchell Spector <spec@vax2.concordia.ca> wrote:

> In article shack@deimos.frii.com (Randy Shackelford) writes...
> >3. white, eject button -> unidisk 3.5, compatible with 32K ROM //c and up,
> >   //e with "Apple 3.5 floppy disk controller card" AKA the LIRON card,
> >   //e with "Apple II 3.5 disk controller card" AKA superdrive card, IIgs
> >   floppy port, IIgs with superdrive card, IIgs with LIRON card (1 MHz only)
> 
>     If using a UniDisk 3.5 on an Apple IIgs, it should be connected 
> directly to the Smartport in back. A UniDisk 3.5 connected to the 
> SuperDrive card will not operate under GS/OS, and the same most likely
> applies with the Liron card (I'm not certain whether the Liron will 
> work in a IIgs at all, though I may very well be wrong).

What gave you the idea that a UniDisk 3.5 wouldn't work under GS/OS with
a SuperDrive card?

It is supposed to work fine, according to the documentation for the
SuperDrive card, and the release notes for System 6.0.  It wouldn't work
with earlier system software versions.  You MUST have the UniDisk3.5
driver installed to use this drive under GS/OS (no matter where it is
connected).

I just plugged in a UniDisk 3.5 to my SuperDrive card (daisy chained
after the SuperDrive), and it seems to work fine (System 6.0.1).

The Liron card does not work in a IIgs (due to an issue with the bus
interface - either an electrical or timing problem, but I don't recall
the exact details).

-- 
David Empson
dempson@actrix.gen.nz
Snail Mail: P.O. Box 27-103, Wellington, New Zealand