xrom

X-ray for NES cartridges.

An NES game is a file of bytes. Somewhere in them is the music, the graphics, every word on screen and the code that moves it all. Here we read those bytes one by one and show how they become the game — with players, scores and diagrams you can poke at.

Games

Utils

The NES sound chip

Our open-source APU, live in the browser. Flip the register bits by hand and hear what they do.