2 Apr
2015
2 Apr
'15
1:58 p.m.
While sorting through some Unibus cards I've had on a dusty shelf for
years, I came across a strange card (picture at
https://www.flickr.com/photos/pnt103/17011635052/).
It has no maker's name, but what looks like a zigzag triple S logo near
the centre of the top edge, and the legends "2010-60", "2010-6001
C835"
and "EM PC" next to that.
Apart from 74LS series, it has the following noteworthy ICs:
10 x Texas 74S2472 PROMs on left
4 x 20-pin and 1 x 16-pin ICs look like PALs at lower right
2 x 74LS181 (4-bit ALU) near the centre, with
2 x AMD 27S03 (16x4-bit bipolar RAM) and 4 x AM2907 (quad bus xcvr)
2 x white ceramic gold-top ICs 93L422-DC (256x4 static RAM)
12.5MHz crystal
2 x 7439 (marked "SEL"), 2 x DS8837, 5 x DS8641
12 x 75452 (high current high speed dual-NAND peripheral drivers)
and a 50-pin 3M IDC connector and a 2x15-way edge connector on the top edge.
Any suggestions as to what it is or who made it?
Being a hex-height card but having only CDEF fingers, it's the exception
that proves the rule that all Unibus hex cards have all six sets of
contacts ;-)
--
Pete
Pete Turnbull
2 Apr
2 Apr
6:30 p.m.
On 04/02/2015 03:58 PM, Pete Turnbull wrote:
While sorting through some Unibus cards I've had
on a
dusty shelf for years, I came across a strange card
(picture at
https://www.flickr.com/photos/pnt103/17011635052/).
It has no maker's name, but what looks like a zigzag
triple S logo near the centre of the top edge, and the
legends "2010-60", "2010-6001 C835" and "EM PC" next to
that.
I KNOW that logo, but I can't for the life of me think of
who it is, right now! I know we had some boards in our
PDP-11 that had that logo on them.
Jon
2 Apr
2 Apr
6:43 p.m.
On 04/02/2015 03:58 PM, Pete Turnbull wrote:
While sorting through some Unibus cards I've had
on a
dusty shelf for years, I came across a strange card
(picture at
https://www.flickr.com/photos/pnt103/17011635052/).
It has no maker's name, but what looks like a zigzag
triple S logo near the centre of the top edge, and the
legends "2010-60", "2010-6001 C835" and "EM PC" next to
that.
The more I think about it, I KEEP coming back to that being
the Storage Technology logo. We might still have an old
Storage Tek binder somewhere at work, I'll see if it has
that logo on it.
Jon
7:03 p.m.
On 03/04/2015 02:43, Jon Elson wrote:
The more I think about it, I KEEP coming back to that
being the Storage
Technology logo. We might still have an old Storage Tek binder
somewhere at work, I'll see if it has that logo on it.
Yes please :-) Meanwhile, do you think it's an earlier version of the
logo on this page?
http://www.strategicsupport.com/equipment/storagetek/l20-tape-library-repair
--
Pete
Pete Turnbull
7:55 p.m.
I found a hex board a few nights ago with the same marking on it, but it
had a 6 fingers on it. I'll try to find it later tonight or tomorrow.
Paul
On Thu, Apr 2, 2015 at 9:03 PM, Pete Turnbull <pete at dunnington.plus.com>
wrote:
On 03/04/2015 02:43, Jon Elson wrote:
The more I think about it, I KEEP coming back to that being the Storage
Technology logo. We might still have an old
Storage Tek binder
somewhere at work, I'll see if it has that logo on it.
Yes please :-) Meanwhile, do you think it's an earlier version of the
logo on this page?
http://www.strategicsupport.com/equipment/storagetek/l20-
tape-library-repair
--
Pete
Pete Turnbull
7:57 p.m.
I love companies that are so proud of their work that they don't put their
name on it.
On Thu, Apr 2, 2015 at 9:55 PM, Paul Anderson <useddec at gmail.com> wrote:
I found a hex board a few nights ago with the same
marking on it, but it
had a 6 fingers on it. I'll try to find it later tonight or tomorrow.
Paul
On Thu, Apr 2, 2015 at 9:03 PM, Pete Turnbull <pete at dunnington.plus.com>
wrote:
On 03/04/2015 02:43, Jon Elson wrote:
The more I think about it, I KEEP coming back to that being the Storage
Technology logo. We might still have an old
Storage Tek binder
somewhere at work, I'll see if it has that logo on it.
Yes please :-) Meanwhile, do you think it's an earlier version of the
logo on this page?
http://www.strategicsupport.com/equipment/storagetek/l20-
tape-library-repair
--
Pete
Pete Turnbull
9:18 p.m.
On 04/02/2015 09:03 PM, Pete Turnbull wrote:
On 03/04/2015 02:43, Jon Elson wrote:
No, I don't think the logo is related.
Jon
The more I think about it, I KEEP coming back to
that
being the Storage
Technology logo. We might still have an old Storage Tek
binder
somewhere at work, I'll see if it has that logo on it.
Yes please :-) Meanwhile, do you think it's an earlier
version of the logo on this page?
http://www.strategicsupport.com/equipment/storagetek/l20-tape-library-repair
3 Apr
3 Apr
6:23 a.m.
On 2015-04-02 22:58, Pete Turnbull wrote:
While sorting through some Unibus cards I've had
on a dusty shelf for
years, I came across a strange card (picture at
https://www.flickr.com/photos/pnt103/17011635052/).
It has no maker's name, but what looks like a zigzag triple S logo near
the centre of the top edge, and the legends "2010-60", "2010-6001
C835"
and "EM PC" next to that.
The logo is System Industries.
They mostly made DEC-compatible disk controllers for other disks, so I'd
suspect something along that line, but I don't know exactly which one
this would be.
Johnny
--
Johnny Billquist || "I'm on a bus
|| on a psychedelic trip
email: bqt at softjar.se || Reading murder books
pdp is alive! || tryin' to stay hip" - B. Idol
8:42 a.m.
On 03/04/2015 14:23, Johnny Billquist wrote:
The logo is System Industries.
They mostly made DEC-compatible disk controllers for other disks, so I'd
suspect something along that line, but I don't know exactly which one
this would be.
That's a good start, though. Thanks!
--
Pete
Pete Turnbull
9:27 a.m.
On 04/03/2015 08:23 AM, Johnny Billquist wrote:
On 2015-04-02 22:58, Pete Turnbull wrote:
THANK YOU! Yes, that must be it, we used a number
of their
boards a long time ago on PDP-11 and VAX systems.
Jon
While sorting through some Unibus cards I've
had on a
dusty shelf for
years, I came across a strange card (picture at
https://www.flickr.com/photos/pnt103/17011635052/).
It has no maker's name, but what looks like a zigzag
triple S logo near
the centre of the top edge, and the legends "2010-60",
"2010-6001 C835"
and "EM PC" next to that.
The logo is System Industries.
3503
days inactive
3504
days old
11 comments
5 participants
participants (5)
-
aek＠bitsavers.org -
bqt＠update.uu.se -
elson＠pico-systems.com -
pete＠dunnington.plus.com -
useddec＠gmail.com