@prokyonid I'm in roughly the same place, and I've found the 6502/6510, specifically the Commodore 64, has the most/best learning resources and tools, by far. And, its small size and consistency (you'll never have to learn about different video or sound cards, every 64 has a VIC-II and a SID) means a human can reasonably learn and reason about the whole machine.I'll try my hand at other CPUs, eventually, but for now the 64 is the right balance of simplicity and well-documented.