[porknubbins]

I was going to say, watching Ben Eater and building his 6502 machine myself filled in so many gaps in knowledge or fuzzy areas around basic computer hardware. If OP sees this he should definitely consider building some of these after Nand2Tetris.

[656565656565]

This! except I (slightly redesigned and) built a common z80 setup, no comparison for knowledge gained from this single effort.