The recent discussion on tape backup devices has been timely, to say
the least. I just picked up an Exabyte 8505XL 8mm tape drive,
hoping to scan a ziplock bag-full of 8mm tapes that were included in
a pickup of several Qbus PDP-11s and uVAXen last year.
Included with the drive is a bare board that rumor has it came from
a Micro Technology 'Liberator' tape backup subsystem. The
interesting part about this board is that it is also rumored to be a
DSSI-to-SCSI adapter. If true then I just maybe, sorta, kinda,
might have a way to connect SCSI hard disks and/or a CD-ROM drive to
my DECsystem 5400, which would be very, very nice.
Unfortunately, I have no docs or technical information on this board,
or the Liberator. Nothing turns up on
bitsavers.org, Manx, the MTI
website, or a general search of Google. I have tried to query MTI's
support group via email, but no reply for a week, and I'm guessing
that whoever received that email just took me for a crank collector
of old comptuers! ;)
While this board isn't really a 'classic' item by any means, nor even
the DECsystem 5400, I'd still appreciate any information that anyone
might have on this.
It is marked "Model: THORN / T/A: 640036-007 REV M / S/A: 640036-001
REV K" and is built around a 68C000 @ 16Mhz, a couple NCR 53C700 SCSI
drivers, 3 (I think) AMD 29c983 bus exchangers (whatever they are)
and a bunch of logic, and two 68-pin SCA-like connectors on the SCSI side.
You can see an image of the board on my mystery boards page at:
http://www.rogerwilco.org/mystery_boards/#MTI_THORN
If I can sort out the power connection, I might start experimenting a
bit through what appears to be an on-board RS-232 port.
The big question is: can I really use this to connect at least one
SCSI hard disk or CDROM to my system?
Thanks!
Jared