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A comment on Cloning a 6502 Apple-1 in just 930 logic gates.

Re:Cloning a 6502 Apple-1 in just 930 logic gates by tyingq on Sunday May 10, 2020 @09:29AM (#23132417)
The C74-6502 is somewhat similar. A 6502 built using 74xx chips, that runs 20x faster than the 6502 (20Mhz vs 1MHz).

And correct enough that he drops it into both a VIC20, and a C64, and it works.

https://c74project.com/

About ~130 74xx chips vs the Gigatron's 33, and SMT instead of through-hole.

Edit: A link to an old school web-ring of other homebrew (mostly) ttl logic CPUs: https://www.homebrewcpuring.org/ringhome.html

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Re:Cloning a 6502 Apple-1 in just 930 logic gates by ncmncm on Sunday May 10, 2020 @03:51PM (#23135546)
There is also a discrete-transistor version that runs much slower than the original 6502, but with the advantage of an LED on each signal, so you can watch it run.

https://m.youtube.com/watch?v=tQIwS2GzXLI

See also (not a 6502 though)

http://6502.org/users/dieter/mt15/mt15.htm

that approches half as fast as a real 6502.

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