oboy is a WIP Odin Game Boy emulator.

Can currently boot and run Pokémon Red.

• Timing is not cycle-accurate. The timer, PPU and DMA are all updated after each instruction.
• The PPU renders a scanline at a time and uses a fixed drawing period. Some games rely on exact PPU timing.
• DMA timing and bus conflicts are not hardware accurate
• The boot ROM is skipped. CPU starts from post-boot state.
• Only ROM-only and MBC3 cartridges are supported. No MBC3 Clock or battery-backed save file support.
• Not all interrupts are implemented (STOP/JP)
• Some hardware rules, like PPU memory access restrictions are not implemented yet.
• No audio, serial/link cable, Game Boy Color or Super Game Boy support.
• No Third-party test ROMs suites run yet - no hardware accuracy guarantees.

Can run with:

odin run src -o:speed -- <path-to-rom>

Can build with:

odin build src -o:speed -out:oboy
./oboy <path-to-rom>

• Build up 3rd Party Rom Test suite
• Add battery-backed save files
• Improve cycle-level CPU, timer, PPU, and DMA synchronization
• Replace fixed scanline rendering timings with more accurate PPU/FIFO behavior
• Finish joypad interrupt behavior
• Add audio through the APU
• Add serial and link-cable register behavior
• Add MBC3 real-time clock
• Support MBC1 and MBC5
• Better UX/UI / COngifu
• Boot ROM Support