From: sergei@upenn5.hep.upenn.edu (Sergei Borodin)
Newsgroups: soc.culture.soviet,vmsnet.pdp-11
Subject: Re: Soviet clones of PDP-11 computers. SM-4, etc. (was: Re: # of pdp-11s still in operation)
Keywords: SM,PDP-11
Date: 17 Oct 92 00:33:06 GMT
Followup-To: soc.culture.soviet
Organization: University of Pennsylvania

In article <1992Oct16.221857.2258@prime.mdata.fi> karttu@mits.mdata.fi (Antti Karttunen) writes:
>In article <1992Oct16.014752.4139@spcvxb.spc.edu> terry@spcvxb.spc.edu (Terry Kennedy, Operations Mgr.) writes:
><among other things.>

>>  Also, a lot depends on what you consider "a PDP-11". For example, the
>>HSC's use PDP-11 CPU's (F-11 [11/23 class] in the 50, J-11 [11/73 class] in
>>the rest. The DECserver 500/550 use an 11/53 CPU card.

>I'm crossposting this to soc.culture.soviet if there are any more knowing
>persons about this subject, and anybody who can tell in which parts
>of the former Soviet Union those SM-computers were made.
>(Yes, for me this is culture too. ;-)
...................
..................
>As this is also crossposted to vmsnet.pdp-11 which is entirely technical
>group I hope you have some sense for directing the follow-ups...
>Thanks.

 I dealt with those computers in 83-87, so quite a time ago. Anyways,
 I can't recall anything called SM-5, the earliest SM series I worked
 with was SM-3, then SM-4. These two were built using discrete logic,
 the most complicated IC was ALU. They were built in Kiev. SM-4 was
 approximate analog of 11/20
 In aproximately 85 "Electronika 100/25" had been built in Kaliningrad
 (don't remember in wich one though). I didn't pull its liver out so
 I can't tell what was the base for it, but most likely the same 74ls00.
 Aproximately at the same time Kiev produced SM1420 which was about the
 same as 11/23. They used soviet variant of AMD2903 (made in Voronezh)
 to make the CPU and MMU. 
 At the end of 80's Kaliningrad made soviet variant of 11/73. Can't tell
 anything about it - top secret :).

 I also should mention soviet LSI-11 series. It was quite popular until
 PC filled up the country. Voronezh produced CPU board based on their
 4-chip set LSI-11/20 soviet brother. Then the customer was on his own.
 Floppies and tapes were available but controllers for them were home-
 brewed.
 Zelenograd produced chip sets for (I believe) Frjazino-built DVK-1,2,3
 "personal" computers. They had alpha-numerical TTY-type monitor, some
 64k memory and floppies. Could be that DVK-3 had graphical screen,
 but I hadn't seen those. 
 The chip set included CPU, SIO, and PIO chips. CPU was close to 11/23+.

 At the same time Voronezh released their J-11 chip set and built 
 a CPU board. Actually, I saw the board and it was not that bad, I would
 say wonderful, 'coz I could compare it with genuine LSI-11/73.
 I also know that Voronezh produced Vax 11/730 (not genuine, though :),
 but haven't seen it.

 That's about it. 

 To the praise of soviet computer industry, although it's not related
 to the topic, I can add that I've seen boards from soviet Cray
 ("electronika SS-BIS" ??) - it was impressive. 20-layers PCBs with
  both side surface mount custom ECL VLSI. Not that number of layers
 is so big, but rather that they kept trace's delays tolerance within 2 ns.

>--
>Antti Karttunen / karttu@mits.mdata.fi / $B%"%s%C%F%#!!%+%k%C%H%%%M%s(J
> ++ Think positively, ota olvia, and vote YES!

 S.B.