5 Jan
2019
5 Jan
'19
10:36 a.m.
Off topic, but looking for help and/or wisdom.
If you visit https://www.scotnet.co.uk/iain/saratov
<https://www.scotnet.co.uk/iain/saratov>/ <https://www.scotnet.co.uk/iain/>
you will see some photos and wire-lists of work that I have started on the front panel of
a Capatob 2.
I plan to get the switches and lights running on a blinkenbone board with a PDP8 emulation
behind it. (I already have an PDP11/70 front-panel running on the same infrastructure)
I have been struggling for over a year to get much info about this saratov computer
(circuit diagrams etc). So I have started the reverse engineering on the panel.
Does anybody know anything about this computer? online or offline it would be much
appreciated.
Iain
6 Jan
6 Jan
6:08 a.m.
https://hapoc2015.sciencesconf.org/file/176702
gives a Little more history on Soviet copies of computers.
The timing of the production of the Capatob 2 seems to make it a
PDP8/L clone, not an M. What is called the 8 is really based on the 5,
used 6-bit bytes, 12 bit words, and was Octal based - memory was the
most expensive part of the system at least through the early 70s, and
thus 12 bit words for double precision, 24bits, was a reasonable
approach for a scientific computer.
bb
On Sat, Jan 5, 2019 at 1:37 PM Dr Iain Maoileoin via cctalk
<cctalk at classiccmp.org> wrote:
Off topic, but looking for help and/or wisdom.
If you visit https://www.scotnet.co.uk/iain/saratov
<https://www.scotnet.co.uk/iain/saratov>/ <https://www.scotnet.co.uk/iain/>
you will see some photos and wire-lists of work that I have started on the front panel of
a Capatob 2.
I plan to get the switches and lights running on a blinkenbone board with a PDP8
emulation behind it. (I already have an PDP11/70 front-panel running on the same
infrastructure)
I have been struggling for over a year to get much info about this saratov computer
(circuit diagrams etc). So I have started the reverse engineering on the panel.
Does anybody know anything about this computer? online or offline it would be much
appreciated.
Iain
9:42 a.m.
On 1/6/19 7:08 AM, Bob Smith via cctalk wrote:
What is called the 8 is really based on the 5, used
6-bit bytes, 12 bit
words, and was Octal based
Is "byte" the correct term for 6-bits? I thought a "byte" had always
been 8-bits. But I started paying attention in the '90s, so I missed a lot.
I would have blindly substituted "word" in place of "byte" except for
the fact that you subsequently say "12-bit words". I don't know if
"words" is parallel on purpose, as in representing a quantity of two
6-bit word.
Will someone please explain what I'm missing that transpired before I
started paying attention in the '90s?
--
Grant. . . .
unix || die
8 Jan
8 Jan
2:06 a.m.
Hi Iain
I asked a guy from Latvia that I know, Olafs. He recognized the
transistors as KT315 A and B. Collector is middle pin.
https://en.wikipedia.org/wiki/KT315
He might also be able to help with spare lights, contact me off-list.
Unfortunately he has no documentation.
/P
On Sat, Jan 05, 2019 at 06:36:56PM +0000, Dr Iain Maoileoin via cctalk
wrote:
Off topic, but looking for help and/or wisdom.
If you visit https://www.scotnet.co.uk/iain/saratov
<https://www.scotnet.co.uk/iain/saratov>/ <https://www.scotnet.co.uk/iain/>
you will see some photos and wire-lists of work that I have started on the front panel of
a Capatob 2.
I plan to get the switches and lights running on a blinkenbone board with a PDP8
emulation behind it. (I already have an PDP11/70 front-panel running on the same
infrastructure)
I have been struggling for over a year to get much info about this saratov computer
(circuit diagrams etc). So I have started the reverse engineering on the panel.
Does anybody know anything about this computer? online or offline it would be much
appreciated.
Iain
2:46 a.m.
Hi again
Olafs also found this:
http://www.nedopc.org/forum/viewtopic.php?t=9778
Unless you know russian, maybe you can use google translate.
Regards,
Pontus.
On Tue, Jan 08, 2019 at 11:06:12AM +0100, Pontus Pihlgren via cctalk
wrote:
Hi Iain
I asked a guy from Latvia that I know, Olafs. He recognized the
transistors as KT315 A and B. Collector is middle pin.
https://en.wikipedia.org/wiki/KT315
He might also be able to help with spare lights, contact me off-list.
Unfortunately he has no documentation.
/P
On Sat, Jan 05, 2019 at 06:36:56PM +0000, Dr Iain Maoileoin via cctalk
wrote:
> Off topic, but looking for help and/or wisdom.
>
> If you visit https://www.scotnet.co.uk/iain/saratov
<https://www.scotnet.co.uk/iain/saratov>/ <https://www.scotnet.co.uk/iain/>
you will see some photos and wire-lists of work that I have started on the front panel of
a Capatob 2.
>
> I plan to get the switches and lights running on a blinkenbone board with a PDP8
emulation behind it. (I already have an PDP11/70 front-panel running on the same
infrastructure)
>
> I have been struggling for over a year to get much info about this saratov computer
(circuit diagrams etc). So I have started the reverse engineering on the panel.
>
> Does anybody know anything about this computer? online or offline it would be much
appreciated.
>
> Iain
2175
days inactive
2178
days old
4 comments
4 participants
participants (4)
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bobsmithofd＠gmail.com -
cctalk＠gtaylor.tnetconsulting.net -
iain＠csp-partnership.co.uk -
pontus＠Update.UU.SE