Sponsored by JLCPCB ($2 for 10 Boards): https://jlcpcb.com
Building and testing the 8-bit One Instruction Breadboard Computer.
Lots of problems with power distribution, dodgy switch arrays and the order of switching edges.

By Julian

Youtuber, shed dweller, solar charge controller aficionado

10 thoughts on “Another look at the 8-bit breadboard computer”
  1. Avataaar/Circle Created with python_avatars V Madison says:

    What if a capacitor is a size of your house, Julian?

  2. Avataaar/Circle Created with python_avatars Network XIII says:

    All these power integrity issues .. the contacts on these types of wireless breadboards are pretty poor to begin with, nevermind if you have actually used them more than a few times.

  3. Avataaar/Circle Created with python_avatars Michael says:

    K for cathodes. ๐Ÿ˜‚

  4. Avataaar/Circle Created with python_avatars Kadah says:

    Ben Eater's 8bit breadboard computer videos are quiet indeepth on the basics of a CPU

  5. Avataaar/Circle Created with python_avatars Alex C says:

    Now I know why a lot of early computers had multi-phase clocks.
    Also FYI – it's not the buffer that interprets high-impedance as low (or high), the actual voltage on the bus was low (or high). You should add pulldowns or pullups if you want that.

  6. Avataaar/Circle Created with python_avatars xjet says:

    How long before you can mine cryptocurrency on this baby? ๐Ÿ™‚

  7. Avataaar/Circle Created with python_avatars GRBTutorials says:

    The "first" instruction? Didn't you decide already that it would only have one instruction (move can be Turing complete, like in x86)?

  8. Avataaar/Circle Created with python_avatars flyingllama87 says:

    Hooray!!

  9. Avataaar/Circle Created with python_avatars Gordon Lawrence says:

    I know the 373/374 were originally designed for ring counters hence the pin-outs but does anyone know why the 244 was designed like that?

  10. Avataaar/Circle Created with python_avatars Ollie B says:

    "much more good" – Julian Ilett 2018

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