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Path: utzoo!attcan!uunet!know!zaphod.mps.ohio-state.edu!uwm.edu!marque!roger
From: roger@marque.mu.edu (Roger Abrahams)
Newsgroups: comp.sys.ibm.pc.hardware,comp.periphs
Subject: Re: Problem getting floppy drive to work with DTC 3280A SCSI card
Message-ID: <9942@marque.mu.edu>
Date: 21 Oct 90 16:06:07 GMT
References: <1990Oct17.165757.4274@polyof.poly.edu> <1990Oct18.152711.18904@sj.ate.slb.com>
Reply-To: roger@booth.UUCP (Roger Abrahams)
Followup-To: comp.sys.ibm.pc.hardware
Organization: Private System
Lines: 25
Followup-To:poster

I missed the original posting on this (not unusual).  I also have this card
and have both 5-14 and 3-1/2 drives on it.  

First of all, you can always try a ^C before doing a directory on the
drive, this should tell dos to reset the drive change flag.  This is
actually a hold over from CPM, as this is how you told CPM that a
new disk was inserted.

The basic problem is probably that SW1 switch 7 is set wrong.  This is
the "dual-speed supported switch".  The card comes from the factory
with this option disabled.  SW1 is the switch directly below the
DTC403 floppy controller.  The switch numbers are 1 at the top to
10 at the bottom.  Simply reverse #7.

There is also another problem, particularly with some 3-1/2 drives as
they have a jumper for the drive change signal.  This is to provide
compatability with older PC's as opposed to AT's.  This could
ALSO be set wrong.

Since I have this exact set-up, I can assure you it works properly.
There is no need to change to another controller.  Mine works quite
well, providing a transfer rate in excess of 800K on a 20mhz 386
machine.

						- Roger