blubaugh@ucqais.uc.edu (Dwight Blubaugh) (09/08/89)
Recently I was replacing a friend's A1000 internal drive with a
Sony 3.5" floppy and after it was all done (it needed only two jumper
resistors moved) I tried to use the same drive in my A2000. Guess what, it
didn't work in an A2000 but worked fine in the A1000. Now I got the bright
idea to check the C= docs for the A1000 and A2000. I see that the A2000 has
much the same signals as the A1000, but the A2000 has defined two lines that
I have no idea what they do. These lines are _INUSE0 and _INUSE1. _INUSE0
is connected to pins 6 and 14 which is drive 4 and drive 3 select respectively
on the Sony. _INUSE1 is connected to pin 4 in the A2000 and this is an
alternate MOT0D* in the A1000. Also pin 3 is not connected in the A2000,
why not grounded like the Sony and A1000?
Now you might ask why bother with this Sony drive? Well it cost my
friend about $40 _NEW_ at a local computer show. If I can find out what
_INUSEx does I could probably set up the Sony properly for the A2000.
--
Technical Advisor of Ohio Valley Amiga Users Group
(Cincinnati Ohio P.O. Box 428539)
UUCP: {decuac,mit-eddie,phri,pyramid}!uccba!ucqais!blubaugh.uc.edu
USMAIL: Dept of Chemistry ML172, University of Cincinnati, Cincinnati OH 45221