Cookieboy is a Gameboy emulator written in C++. Main features: -Gameboy and Gameboy Color emulation -Full CPU emulation with accurate timings. Passes all blargg's CPU tests (opcodes and timings). -Accurate memory timings emulation. Passes blargg's RAM timings tests. -Full emulation of several ROM MBC's: MBC1, MBC2, MBC3 with RTC, MBC5, MMM01. -Supports battery powered external RAM. -Full LCD emulation. Background, window, sprites. -Pretty accurate LCD controller timings emulation with OAM and VRAM locking. Passes blargg's lcd-sync.gb test. -Accurate sound emulation. Passes all blargg's sound tests - DMG sound tests and CGB sound tests in both DMG (with proper error codes) and CGB modes. Key mapping: Up: Up Down: Down Left: Left Right: Right A: Z B: X Start: S Select: A Debugging helpers: F1: Toggle backgroud F2: Toggle window F3: Toggle sprites F5: Toggle sound 1 F6: Toggle sound 2 F7: Toggle sound 3 F8: Toggle sound 4 By default emulator runs at normal Gameboy speed. Press "Space" to run at maximum speed (depends on your PC).