21 Jul
2018
21 Jul
'18
2:37 p.m.
This board was sitting in slot 21 of the backplane in a 11/45
https://i.imgur.com/ZYWZQCo.jpg
What kind of board is this?
It has 26 bipolar RAMS. Fairchild 93415 1kbit SRAM.
The manufacturer might be ACT whatever that is.
My guess is that it is some kind of cache board? It is connected to both
unibuses in the machine.
Better ideas? Documentation?
/Mattis
21 Jul
21 Jul
4:43 p.m.
any identification number sn front or back? can tell from just that shot.
On Sat, Jul 21, 2018 at 2:37 PM, Mattis Lind via cctalk
<cctalk at classiccmp.org> wrote:
This board was sitting in slot 21 of the backplane in
a 11/45
https://i.imgur.com/ZYWZQCo.jpg
What kind of board is this?
It has 26 bipolar RAMS. Fairchild 93415 1kbit SRAM.
The manufacturer might be ACT whatever that is.
My guess is that it is some kind of cache board? It is connected to both
unibuses in the machine.
Better ideas? Documentation?
/Mattis
22 Jul
22 Jul
2:36 a.m.
ACT is parked on the upper-right under the handle.
Several variants of "10003" are marked near the left handle.
And it's copyrighted 1976.
ACT = ABLE Computer Technology.
Their first product was PN 10001 (copyright 1976), the A.C.T. Univerter; see
"Able_Univerter_Nov81.pdf" on Bitsavers.
http://bitsavers.trailing-edge.com/pdf/able/Able_Univerter_Nov81.pdf
-----Original Message-----
From: cctalk [mailto:cctalk-bounces at classiccmp.org] On Behalf Of Bob Smith via cctalk
Sent: Saturday, July 21, 2018 4:44 PM
To: Mattis Lind; General Discussion: On-Topic and Off-Topic Posts
Subject: Re: Strange third party board in PDP-11/45
any identification number sn front or back? can tell from just that shot.
On Sat, Jul 21, 2018 at 2:37 PM, Mattis Lind via cctalk
<cctalk at classiccmp.org> wrote:
This board was sitting in slot 21 of the backplane in
a 11/45
https://i.imgur.com/ZYWZQCo.jpg
What kind of board is this?
It has 26 bipolar RAMS. Fairchild 93415 1kbit SRAM.
The manufacturer might be ACT whatever that is.
My guess is that it is some kind of cache board? It is connected to both
unibuses in the machine.
Better ideas? Documentation?
/Mattis
2:41 a.m.
well, I was close..... they all sound alike with brain fog. I still have a
bunch of it, some marked ACT, some ABLE.
On Sun, Jul 22, 2018 at 1:36 AM, Paul Birkel via cctalk <
cctalk at classiccmp.org> wrote:
ACT is parked on the upper-right under the handle.
Several variants of "10003" are marked near the left handle.
And it's copyrighted 1976.
ACT = ABLE Computer Technology.
Their first product was PN 10001 (copyright 1976), the A.C.T. Univerter;
see "Able_Univerter_Nov81.pdf" on Bitsavers.
http://bitsavers.trailing-edge.com/pdf/able/Able_Univerter_Nov81.pdf
-----Original Message-----
From: cctalk [mailto:cctalk-bounces at classiccmp.org] On Behalf Of Bob
Smith via cctalk
Sent: Saturday, July 21, 2018 4:44 PM
To: Mattis Lind; General Discussion: On-Topic and Off-Topic Posts
Subject: Re: Strange third party board in PDP-11/45
any identification number sn front or back? can tell from just that shot.
On Sat, Jul 21, 2018 at 2:37 PM, Mattis Lind via cctalk
<cctalk at classiccmp.org> wrote:
This board was sitting in slot 21 of the
backplane in a 11/45
https://i.imgur.com/ZYWZQCo.jpg
What kind of board is this?
It has 26 bipolar RAMS. Fairchild 93415 1kbit SRAM.
The manufacturer might be ACT whatever that is.
My guess is that it is some kind of cache board? It is connected to both
unibuses in the machine.
Better ideas? Documentation?
/Mattis
21 Jul
21 Jul
6:54 p.m.
I think it's Applied Computer Technologies, and I think they made cache
and several other options. They were popular back in the day. I have a
bunch of their boards here.
Paul
On Sat, Jul 21, 2018 at 1:37 PM, Mattis Lind via cctalk <
cctalk at classiccmp.org> wrote:
This board was sitting in slot 21 of the backplane in
a 11/45
https://i.imgur.com/ZYWZQCo.jpg
What kind of board is this?
It has 26 bipolar RAMS. Fairchild 93415 1kbit SRAM.
The manufacturer might be ACT whatever that is.
My guess is that it is some kind of cache board? It is connected to both
unibuses in the machine.
Better ideas? Documentation?
/Mattis
2192
days inactive
2193
days old
4 comments
4 participants
participants (4)
-
bobsmithofd＠gmail.com -
mattislind＠gmail.com -
pbirkel＠gmail.com -
useddec＠gmail.com