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Thread: FS: XT-IDE #500, Another Mil-Spec Build with Slot 8 Support and 8 GB DOM

  1. #1
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    Default FS: XT-IDE #500, Another Mil-Spec Build with Slot 8 Support and 8 GB DOM

    link: https://www.ebay.com/itm/273482407024

    Above is the listing for the 500th XT-IDE board, not counting prototypes! This is the 500th board out of the production runs of both the rev 3 and rev 4 boards. I've had this half-completed on my workbench for a while and finally got around to finishing and listing it -- I actually just shipped board #700 today! Time sure does fly!

    Anyway, I figured I'd build up #500 as as special "mil-spec" build, as I'd done once before. I casually collect mil-spec ICs and parts, so every now and then I build up a regular board as a "mil-spec" board, mostly just because I like doing it. Since the last "mil-spec" XT-IDE went over well, I figured #500 was a good opportunity to make another available.

    And, a special note to everyone who's bought an XT-IDE board or helped debug them or anything, whether it's mine or someone else's: thank you for supporting the hobby, open source hardware, and those of us trying to do neat things! Doing this would not be possible without community support! I didn't start the XT-IDE project but I'm happy and honored to carry on the original, open source design as a still free-as-in-freedom community design.

  2. #2
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    Glitch, isn't it true that many SSI mil-spec ICs are standard commercial ones that have been derated? It's always seemed that there's not a lot of practical difference between an SN5400 and SN7400.

  3. #3

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    It's not mil-spec unless the bracket is olive drab cad plated

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    Quote Originally Posted by Chuck(G) View Post
    Glitch, isn't it true that many SSI mil-spec ICs are standard commercial ones that have been derated? It's always seemed that there's not a lot of practical difference between an SN5400 and SN7400.
    It's my understanding that unless it's rad-hardened, it's probably just graded really high. And usually packaged in ceramic sandwich, of course.

    Quote Originally Posted by Plasma View Post
    It's not mil-spec unless the bracket is olive drab cad plated
    Hah! Probably have to strip the chrome first

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    Quote Originally Posted by glitch View Post
    It's my understanding that unless it's rad-hardened, it's probably just graded really high. And usually packaged in ceramic sandwich, of course.
    Heh, that ceramic thing back in the early days turned out to be a liability. Some of the ceramics that were in use were alpha-emitters. They couldn't figure out why the DRAMs would drop bits...

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    Quote Originally Posted by Chuck(G) View Post
    Heh, that ceramic thing back in the early days turned out to be a liability. Some of the ceramics that were in use were alpha-emitters. They couldn't figure out why the DRAMs would drop bits...
    Interesting! I'll have to get out the thin window G-M tube and see if I've got any that are!

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