Very cool. At university I built a 4 bit stack based CPU out of TTL. It had store, load opcodes and could address 8K words of RAM so it had some actual utility

Very cool. At university I built a 4 bit stack based CPU out of TTL. It had store, load opcodes and could address 8K words of RAM so it had some actual utility. It was one of the most interesting things I’ve ever done. Annoyed they wouldn’t let me take it at the end of the course!