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Article #1164

A2000 vs. A1000 drive pin outs????

#1164
From: Dwight Blubaugh
Date: Thu, 07 Sep 1989 21:49
22 lines
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	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
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From: blubaugh@ucqais.uc.edu (Dwight Blubaugh)
Newsgroups: comp.sys.amiga.tech
Subject: A2000 vs. A1000 drive pin outs????
Keywords: Floppy drives, A2000, A1000
Message-ID: <1805@ucqais.uc.edu>
Date: 7 Sep 89 21:49:11 GMT
Organization: Univ of Cincinnati, College of Business Admin.
Lines: 22