:) There are many (it's a thing): https://hackaday.io/projects?tag=CPU https://hackaday.io/projects?tag=CPU (Some are FPGA, most are TTL) Including two risc-

:) There are many (it's a thing): https://hackaday.io/projects?tag=CPU https://hackaday.io/projects?tag=CPU (Some are FPGA, most are TTL) Including two risc-v implementations (one seems stalled): https://hackaday.io/project/18491-worlds-first-32bit-homebrew-cpu https://hackaday.io/project/18491-worlds-first-32bit-homebre... (No activity for a while now) and https://www.youtube.com/playlist?list=PLEeZWGE3PwbansoxKjjMKHQqS_2cm8i60 https://www.youtube.com/playlist?list=PLEeZWGE3PwbansoxKjjMK... One I am particularly interested in is the Gigatron: https://hackaday.io/search?term=Gigatron&category=project%20project https://hackaday.io/search?term=Gigatron&category=project%20... (Especially now that there's real IO being hacked in)