DSD 4140 Qbus floppy controller

From: Michael Davidson <michael_davidson_at_pacbell.net>
Date: Thu Jul 5 17:29:26 2001

While searching through my collection of old Qbus cards I just
discovered that I have a DSD 4140, which appears to be an RX02
compatible interface to Shugart SA800 or SA850 drives.

The only documentation that I have is a small reference card
which has the jumper configuration and a summary of the commands
(from which it appears that the controller also supports
formatting drives with a write sector command followed by a
couple of magic values written to the data register).

Does anyone have any more information / documentation for this
controller?

Since I don't have any 8" Shugart interface drives available
I'm probably going to have to hook this thing up to a 5.25"
or a 3.5" drive in order to try it out. I seem to recall that
constructing a suitable 50 way to 34 way cable adaptor is
relatively simple, but again I would appreciate references or
more information from anyone who has done this kind of thing
recently.

Michael
Received on Thu Jul 05 2001 - 17:29:26 BST