Building a Game Boy to Teach an AI Tetris

Why I'm Building a Game Boy Emulator (in Python, from Scratch) A few months ago I asked myself: do I actually understand how a CPU works, or do I just think I do? I've been writing software for years. I know what a CPU is, roughly. I've heard the words: registers, opcodes, clock cycles. But if you asked me to explain exactly what happens between the moment a program starts and the first pixel appearing on screen, I'd be hand-waving pretty fast. So I decided to stop hand-waving. Why a Game Boy I