I built a GBA Emulator! 🥑

A developer shares their experience building Guac, a Game Boy/Game Boy Color/Game Boy Advance emulator written in Go. The project features console mode with game selection, controller support, and configurable settings. Key technical challenges included switching from SDL2 to Ebiten engine to avoid C bindings overhead, implementing performance optimizations like replacing modulos with bitwise operations, and handling signed byte loads for audio processing. The emulator achieves 400 FPS on modern hardware and includes plans for Nintendo DS support in the future.