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From: nilov@kaija.spb.su (Alex G. Nilov)
Newsgroups: comp.sys.ibm.pc.hardware,comp.sys.ibm.pc.misc
Subject: Help with 3-1/2" floppy
Message-ID: <AF1MjgdWm5@nilov.spb.su>
Date: 2 Feb 91 15:06:41 GMT
Sender: news-server@jumbo.hq.demos.su
Reply-To: nilov@kaija.spb.su
Organization: Leningrad State University, USSR
Lines: 24

I have Matsushita JU-253 3-1/2" floppy drive without any documentation.
I've tried to connect my drive to either XT- and AT-type computer.

When program leaves drive on the track 00 after read/write completion
and controller selects another (5") drive, it may be unable to read/write
3" disk once more (system message is: Unable to read ...).
After manual heads moving from track 00 all is OK again.

I've tested TRACK00 and READY pins on interface cable - ALL OK.

This drive was rescued from Amstrad PPC-640 portable computer,
where it works sucessfully.
Amstrad interface cable checkings have a folowing results:
It uses unknown (to me) signals on pin 2 and 4 of cable.

I need help on this problem. Does anyone know this pin
value? What can I do with my drive or controller ?

Thanks...
-- 
Alex G. Nilov      | e-mail <nilov@nilov.spb.su>
systems engineer   |	    <nilov%kaija.spb.su@relay.eu.net>
   USSR		   | phone: +7 (812) 3501364 
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