A repository of gate-level simulators for the Game Boy #Nintendo #Gameboy #Emulation #Gaming

GateBoy is a gate-level simulation of the original Game Boy hardware that was reverse-engineered from die shots of the original DMG-01 chip.

It includes all the standard cells on the chip, minus the audio (too slow). It does not currently simulate the CPU at the gate level – it’s made of custom logic and is a bit too blurry for me to decipher. GateBoy’s CPU is instead my current best guess at how it might be implemented given the constraints implied by the rest of the chip.

Precompiled builds with test ROMS and Plait data are here – https://github.com/aappleby/MetroBoy/releases/tag/GateBoy_v0.1.1

GateBoy runs at around 6 to 8 frames per second in “fast mode” on a modern 4-ish GHz processor. That’s quite horrible compared to an emulator, but pretty impressive for something that’s simulating a few billion gates per second on a single core.

You can see this amazing project and code on GitHub.


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