6800 running on a Mimeo 1

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For a while now, we have speculated about how well a 6800 would really work in an Apple 1. Well, a 6800 is running now on a Mimeo. See Lionel’s utube video for proof.

Eric Smith had previously created a 6800 Apple 1 monitor that he ran in emulation. Lionel took that monitor and went to work to make it run on real hardware. Lionel had to make two changes to make it work.

  • the 6800 7404 had to be changed to a slower 74L04 in order to make clock timing work
  • pin 39, which is not connected in a 6501, had to be pulled down to ground with a 10K resistor

    • Kudos to Lionel for making what I think is an Apple/Mimeo 1 first…