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So I bought 3 Russian cpu's

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    So I bought 3 Russian cpu's

    Heard good things. Would be very interested in hearing any specifics about these (8086), manufacturing details and such. I don't even have a working pc at this point, except 1 or 2 Atari ST's. My AT&T 6300 was partially working the last time I plugged it in. Lessee my APC III also uses that chip, but it's currently dead to the world. Wish me luck.

    #2
    That's cool. I have one of the Russian 1806 CPUs on the way (LSI-11 clone). Supposedly they are dog slow, but in this day and age the only way I'll ever afford a PDP-11 is to build my own 11/03 clone. :/
    -- Lee
    If you get super-bored, try muh crappy YouTube channel: Old Computer Fun!
    Looking to Buy/Trade For (non-working is fine): Mac IIci hard drive sled and one bottom rubber foot, Multisync VGA CRTs, Decent NuBus video card, PC-era Tandy stuff, Weird Old Unix Stuff, Aesthetic Old Serial Terminals (HP and Data General in particular)

    Comment


      #3
      Are these Soviet-era CPUs or modern clones? I do know that many Russian factories still make nixie tubes though.
      Vintage computer systems and peripherals I'm currently looking for:
      IBM PS/2 Model P70, Compaq Contura 3/25, Any Toshiba Libretto laptop from the Libretto 50CT up to the 110CT, Commodore 1541 disk drive in working condition.

      Send a PM if you are interested in selling any of these items to me. Thanks!

      Comment


        #4
        I've heard stories to the effect that soviet era eastern block chips do not fit western chip footprint. Purportedly leg spacing were converted from imperial to metric, then rounded off. So the first few legs will fit, but further away from pin 0, the greater rounding offset becomes.

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          #5
          Originally posted by dorkbert View Post
          I've heard stories to the effect that soviet era eastern block chips do not fit western chip footprint. Purportedly leg spacing were converted from imperial to metric, then rounded off. So the first few legs will fit, but further away from pin 0, the greater rounding offset becomes.
          This is true. Standard DIP spacing is 0.1 inches, or 2.54mm, while the Soviet ICs are 2.5mm. If you use cheap wiper sockets you can probably get away with cramming up to a 40 pin DIP into a standard socket but the chip will be about a millimeter too short so more than that wouldn't be pretty.

          Edit: I assume the chips in question here are K1810VM86's. Here's a blog post that shows the mismatch in length and other details.

          http://www.mattmillman.com/projects/8od/k1810bm86/

          It confirms that a cheap and nasty wiper socket will accommodate one.
          My Retro-computing YouTube Channel (updates... eventually?): Paleozoic PCs Also: Blogspot

          Comment


            #6
            I could always fabricate a small pcb. The guy just informed me it could take 2 months to receive them. Whatever. If I get them and they work properly I'll consider it a win.

            Comment


              #7
              Originally posted by tipc View Post
              I could always fabricate a small pcb. The guy just informed me it could take 2 months to receive them. Whatever. If I get them and they work properly I'll consider it a win.
              Я МОГУ СДЕЛАТЬ ОШИБКУ
              Surely not everyone was Kung-fu fighting

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                #8
                is that you're way of telling me I pulled a boner . I've ordered stuff from the Baltics before. One guy I had to lean on, but eventually got my stuff.

                Comment


                  #9
                  Originally posted by bladamson View Post
                  That's cool. I have one of the Russian 1806 CPUs on the way (LSI-11 clone). Supposedly they are dog slow, but in this day and age the only way I'll ever afford a PDP-11 is to build my own 11/03 clone. :/
                  You might be interested in my blog post 'Soviet PDP-11 Clones'. It is about the J-11 and F-11 CPU clones and the KDJ11-like CPU board the J-11 goes into.

                  Comment


                    #10
                    Originally posted by TH2002 View Post
                    I do know that many Russian factories still make nixie tubes though.
                    There are no original Russian factories still producing Nixie tubes. The Chinese still make some (or are still selling factory stock). Dalibor Farny has a business making Nixie tubes, but that is a fresh-from-scratch start. There have been a few crowd-funded attempts to make replica IN-18 Nixies, but that is neither the original factories nor the original equipment (part, but not all, of the IN-18 assembly line was auctioned off 10 or so years ago and vanished). There are still a lot of New Old Stock Nixie, VFD, and more esoteric displays available from former Soviet countries, but those are old tubes that have been hoarded.

                    You may be thinking of the Svetlana / New Sensor / Reflektor / Xpo-pul (take your pick) audio tubes which are still being manufactured.

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                      #11
                      What's the point of buying Russian clones of CPUs that are widely available as original parts?

                      Comment


                        #12
                        What's the point of not buying them, but for connection issues, as these are purported to be new, and cheaper for the most part. Beats Chinese variants.

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                          #13
                          Visit a https://efind.ru/
                          There are ALOT of companies selling USSR CPUs, mostly for local buyers. Prices are relative cheap.
                          Some guy bought chips there and re-sell them at e-buy. Good business!

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                            #14
                            Grassy ass my moochacho. For now I think I'm good. 3 chips for ~20$.

                            Comment


                              #15
                              Originally posted by Terry Kennedy View Post
                              You might be interested in my blog post 'Soviet PDP-11 Clones'. It is about the J-11 and F-11 CPU clones and the KDJ11-like CPU board the J-11 goes into.
                              Apparently the Soviets had what amounted to an 8-bit home computer based on the LSI-11 architecture, called the Elektronica BK. I think that's pretty neat.
                              -- Lee
                              If you get super-bored, try muh crappy YouTube channel: Old Computer Fun!
                              Looking to Buy/Trade For (non-working is fine): Mac IIci hard drive sled and one bottom rubber foot, Multisync VGA CRTs, Decent NuBus video card, PC-era Tandy stuff, Weird Old Unix Stuff, Aesthetic Old Serial Terminals (HP and Data General in particular)

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