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Thread: S-100 Cards - SD Systems, Processor Technologies, MCT

  1. #1
    Join Date
    Jan 2019
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    St. Paul, MN
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    Default S-100 Cards - SD Systems, Processor Technologies, MCT

    Selling the following S-100 cards:

    1) SD Systems - SBC-200 Z-80 CPU / ROM / serial / parallel board, VERSAFLOPPY II board & EXPANDORAM II (64Kb). All working pulls, asking $275 for the set.

    2) MCT - 105510 Dual serial communications board, fitted with 1014 & 1015 USARTS. Working pull, asking $75.

    3) Processor Technologies - Riser card for testing & troubleshooting. Asking $25.

    4) Prototyping board, stuffed with wire-wrap sockets. Asking $30.

    Large photos at: http://nerp.net/~legendre/altair/s-100_boards_for_sale/
    Man's inhumanity to man is outmatched only by his cruelty towards animals.

  2. #2
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    The SD Systems board set is nice, that's basically an entire SDOS or CP/M setup minus the disk drives and S-100 backplane. I don't need it, but if someone here gets it and wants to get CP/M up and going, I do have CP/M 2.2 generated for the SBC-200 with VersaFloppy II on 3.5" HD and 8" drives. It does require a ROM swap on the SBC.

  3. #3
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    Jan 2019
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    St. Paul, MN
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    Correction- The large chips are AY-3-1014A & AY-3-1015D UARTs (not USARTS, far as I know). Also, the darkened area below the UARTs is due to the use of under-rated Zeners & bias resistors. I've replaced these with 1W parts which should run cooler.
    Man's inhumanity to man is outmatched only by his cruelty towards animals.

  4. #4
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    Quote Originally Posted by glitch View Post
    The SD Systems board set is nice, that's basically an entire SDOS or CP/M setup minus the disk drives and S-100 backplane. I don't need it, but if someone here gets it and wants to get CP/M up and going, I do have CP/M 2.2 generated for the SBC-200 with VersaFloppy II on 3.5" HD and 8" drives.
    I also have a set of (2) 8" drives available, just haven't pulled them out yet to get pics.

    It does require a ROM swap on the SBC.
    I'm not sure it would. Far as I know, the previous owner was running CP/M on this hardware. My knowledge isnt deep enough to say either way, but there were 8" CP/M disks at one point. I may still have them.
    Man's inhumanity to man is outmatched only by his cruelty towards animals.

  5. #5
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    Quote Originally Posted by WimWalther View Post
    I'm not sure it would. Far as I know, the previous owner was running CP/M on this hardware. My knowledge isnt deep enough to say either way, but there were 8" CP/M disks at one point. I may still have them.
    My CP/M build requires a ROM swap, there are almost certainly builds out there that don't. I have SD Systems CP/M Plus (CP/M 3) on 8" that I haven't gotten working yet; presumably, that boots with the SD Systems ROMs.

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