DSD 4140 Qbus floppy controller

From: Jonathan Engdahl <engdahl_at_cle.ab.com>
Date: Fri Jul 6 08:59:47 2001

I have the manual for this board. I seem to recall that it's one
of the old style manuals that give you theory of operation and a
lot of detailed info. I also have two of the boards, and two 8"
half height floppy drives. I'm not greatly attached to any of
this. I've just been letting it ripen in the attic until someone
came along that was interested.

There was some discussion about these boards, and how they
accomplish boot without a ROM, a month or two ago.

--
Jonathan Engdahl             Rockwell Automation
Principal Research Engineer  24800 Tungsten Road
Advanced Technology          Euclid, OH 44117  USA
Euclid Labs                  http://users.safeaccess.com/engdahl
----- Original Message -----
From: "Michael Davidson" <michael_davidson_at_pacbell.net>
To: <classiccmp>
Sent: Thursday, July 05, 2001 6:29 PM
Subject: DSD 4140 Qbus floppy controller
> 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 Fri Jul 06 2001 - 08:59:47 BST