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From: grandi@noao.UUCP (Steve Grandi)
Newsgroups: net.micro,net.micro.pc
Subject: Teac FD-55B jumpers
Message-ID: <433@carina.noao.UUCP>
Date: Sun, 1-Sep-85 00:09:15 EDT
Article-I.D.: carina.433
Posted: Sun Sep  1 00:09:15 1985
Date-Received: Mon, 2-Sep-85 08:48:11 EDT
Organization: Natl. Optical Astronomy Observatories, Tucson, AZ USA
Lines: 18
Xref: linus net.micro:10527 net.micro.pc:4910

I have recently put together an Ampro little board/186 system with two
Teac FD-55B floppy disk drives.  Unfortunately, the manual I have for
the drives seems to refer to an earlier model; the jumpers on my disks
(which are labelled FD-55BV) are very different from what is
documented.  It is pretty easy to figure out the drive select jumpers;
but what I really want to do is to change the drives so the heads are
loaded whenever the motor is on instead of whenever the drive is
selected (that's what Ampro recommends and I'm also having trouble with 
trashed disk blocks on freshly written files).

On my Teac FD-55BVs there is a row of jumpers with the markings DS0,
DS1, DS2 and DS3 (obviously the disk select lines), a second row with
markings U1, U2, HL and IU and an isolated jumper marked FG.  The
drive came with jumpers on the FG and IU locations.  Does anyone have
any information on these jumpers?
-- 
Steve Grandi, National Optical Astronomy Observatories, Tucson, AZ, 602-325-9228
{arizona,decvax,hao,ihnp4,seismo}!noao!grandi  noao!grandi@lbl-csam.ARPA