dbreunig/nesformer

Summary

Drew Breunig built a working NES 6502 CPU emulator into the weights of Qwen3.5-4B, so the model can run NES ROMs such as Super Mario Bros, though very slowly. He shared the Opus 5.5 prompts he used, which pointed to a 15-year-old NES CPU conformance test suite released by Christopher Pow.

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