RustyBoy is a Game Boy emulator written in Rust. It&#x27;s one of those projects that sounds simple until you start building it. Then you realize a handheld game console isn&#x27;t one thing. It&#x27;s a pile of small systems pretending to be one thing. A CPU. Memory. Timers. Interrupts. Graphics. Input. Audio. Cartridges. Weird hardware behaviours. Decades of games accidentally depending on…