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S-100 kit building

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    #16
    And just to reply to this question"Are all the IC's still readily available new? Things like the Z80 etc?"

    Yes, all the parts are available and from multiple sources. Eg the Z80 from futurlec for $1.95 or the cmos lower power version for $2.90.
    http://www.smarthome.viviti.com/

    Comment


      #17
      RE-visiting the thread

      Hi, Just re visiting this thread again as we have a bit of renewed interest.

      Recently our group finally got a System 80.

      I'm now wondering how things are going with the S-100 PCB's?

      Also reading your comments again I can see that maybe a 12 card board would be a big ask in the early designing stages and cost wise etc.

      However I do wonder if perhaps a slightly bigger one could be looked into maybe 6 ports?

      I am thinking that for the System 80 the following would be nice.

      1. Ram expansion card.
      2. IO card (rs232, centronics, FD controller).
      3. IDE controller.

      Doesn't leave a lot of room for future expansion on a 4 slot board.

      Also can any of your existing card designs be utilised in the S100 back plane with a System 80 or TRS80? Very keen on the idea of adding an IDE hard drive for example.???

      Once again thanks for all your fantastic work in this retro computing area.

      BTW, Have put other System 80 enthusiasts on to this thread also so expect more interest soon!

      ~Ken~
      .-.-.

      Comment


        #18
        Originally posted by vk4akp View Post
        Hi, Just re visiting this thread again as we have a bit of renewed interest.

        Recently our group finally got a System 80.

        I'm now wondering how things are going with the S-100 PCB's?
        Hi! Thanks! Well, I've made some progress. I had a batch of S-100 backplane and S-100 prototyping boards made. The good news is they appear to work fine. All the units are with their new owners so I am out of boards. The bad news is that they cost more than I would have preferred so they were slow to find new owners.

        Right now I am gathering up interested committed buyers on a waiting list. If we get the quantity high enough I'll do another order but am not willing to it all on spec for fear of getting an expensive box of PCBs no one wants. I am thinking 10 for the backplane and 20 for the prototyping board brings some price improvements. With those quantities the PCBs are probably on the order of $20 each. Larger quantities would be better though and get the price down.

        As of yesterday PM, I had 3 backplane and 6 prototyping boards reserved and noticed this morning a couple more of each so the totals are slowly ticking upward. With every addition to the waiting list the planned new purchase becomes more plausible.


        Also reading your comments again I can see that maybe a 12 card board would be a big ask in the early designing stages and cost wise etc.

        However I do wonder if perhaps a slightly bigger one could be looked into maybe 6 ports?
        The S-100 backplane PCB is 6 slot.



        I am thinking that for the System 80 the following would be nice.

        1. Ram expansion card.
        2. IO card (rs232, centronics, FD controller).
        3. IDE controller.

        Doesn't leave a lot of room for future expansion on a 4 slot board.

        Also can any of your existing card designs be utilised in the S100 back plane with a System 80 or TRS80? Very keen on the idea of adding an IDE hard drive for example.???

        Once again thanks for all your fantastic work in this retro computing area.

        BTW, Have put other System 80 enthusiasts on to this thread also so expect more interest soon!

        ~Ken~
        .-.-.
        I have looked at the X4010 and X4020 as a possible ECB to S-100 bridge board but that project is on the back burner for now. There is a lot of activity on the Eurocard ECB side and I'd like to do some S-100 projects maybe this winter.

        A System 80 bus to ECB bridge might be pretty straight forward though. Basically a Z80 CPU shim socket to PCB with bus control logic, buffers and transceivers. Then you could use N8VEM peripherals directly.

        I haven't looked into it but it may be possible to extract the signals for ECB out of the System 80 system bus connector too. If all the Z80 bus signals are present or could be easily derived then it would be fairly straight forward to do.

        Thanks and have a nice day!

        Andrew Lynch

        Comment


          #19
          Hi Andrew, Yea we'll take a board. I do need to understand better though whats needed to get a working S100 bus on a System 80 and or TRS-80.

          When you get closer to knowing let me know what we would need and prices etc.

          Also adapting your projects to use the IDE cards etc on a System 80 would be fantastic!

          ~Ken~
          .-.-.

          Comment

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