tl;dr: A hobbyist compiled a working NES 6502 CPU, 2KB RAM, and 32KB cartridge ROM directly into the weights of a Qwen3.5 model, with the Gated DeltaNet state acting as the machine's memory — no training involved. The model generates the CPU's execution trace token-by-token while a host program handles PPU rendering, controller input, and NMI timing. It runs NROM-mapper games like Super Mario Bros. at roughly 150–290× slower than real hardware, with traces that exactly match a reference emulator.