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Thread: IMSAI 8080 programming (I need help!)

  1. #11

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    I definitely benefited from the ideas here. I had never thought about the lack of indirect addressing for 8080 I/O, nor did I realize that the Z80 had this feature.

    Still curious what the serial I/O hardware is in this case.

    Also curious about the IMSAI setup Dwight describes, but perhaps this is better suited to another thread...

  2. #12

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    I mentioned several possible setups. Which one?
    Dwight

  3. #13

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    "I have such a IMSAI setup. In fact I have no system ROM, on reset it DMAs the first sector into memory. After reset, I just start at RAM address 0 and it loads CP/M with my 100% RAM address."

    I guess this sounds similar to the Tarbell 1011 controller.

  4. #14

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    Quote Originally Posted by ef1j91 View Post
    "I have such a IMSAI setup. In fact I have no system ROM, on reset it DMAs the first sector into memory. After reset, I just start at RAM address 0 and it loads CP/M with my 100% RAM address."

    I guess this sounds similar to the Tarbell 1011 controller.
    See: http://www.retrotechnology.com/dri/torode_designs.html
    on Herb's site.
    Dwight

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