The Fancy Memory Loader 8-bit CPU, or FML-8 for short.
If you are interested in how it works and/or how to program this bad boy, there is a manual.
Edit 2021-11-07: Updated manual to revision 1.1
This is ABSOLUTELY STUNNING. I love that you have a manual for it. I’m gonna have fun programming this beast. Beautiful work, and thank you for sharing!