On 16 Jul 2010 at 9:25, Steven Hirsch wrote:
  - Treat each physical diskette as a logical drive and
use binary
 select lines on interface to choose. 
That's the way the Amlyn drives for the Apple that I've seen work.
One drive mechanism, magazine of five floppies, appears as five
drives.
There was also a version for the PC, but I don't remember how that
worked.
--Chuck