I started a new thread so this wasn't buried in the previous discussion.

The code for my Apple 1 emulator on the Adafruit SAMD21 boards is now available at:
https://github.com/rkincaid/a1plus

The system has been built and tested on Adafruit Trinket M0 and Neo Trinkey boards. It includes three flavors of BASIC and a number of built-in programs. I added a fair amount of documentation for how to run and what to expect. I estimate it's running at the equivalent of about a 0.8Mhz clock. Slightly slower than a real Apple I, but quite usable.

I'm using the Arduino version of Mike Chambers emulator with Mike B's BCD patch. So EhBasic returns the proper values for the HEX$ function.

Give it a look if you're interested. I'd be interested if anybody gives it a try or has any other feedback.

It's a bit of a parlor trick to run this on such tiny boards, but they work surprisingly well.

Robert

That project looks quite nice, Robert! It's well documented, and your care and attention to detail seem evident. Now you just need to port my hand-modified back-port of the Woz/Baum mini-assembler and disassembler to give your clients the control and power for which they lust .

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Got a kilobyte lying fallow in your 65xx's memory map? Sprinkle some VTL02C on it and see how it grows on you!

Mike B. (about me) (learning how to github)