Have you read a book called Code by Charles Petzold [0] by chance? It walks you through how a computer works from low level relays all the way up to building a

Have you read a book called Code by Charles Petzold [0] by chance? It walks you through how a computer works from low level relays all the way up to building a processor and running an OS. He talks about both the Z80 and 6502, and peppers in a lot of the history along the way. The book has me really itching to play around with one of the two and it sound like the Z80 might be the way to go. [0] https://www.amazon.com/gp/aw/d/0735611319/ https://www.amazon.com/gp/aw/d/0735611319/