#438 · Primary category： Education & Research
z80ai
Z80-μLM is a 2-bit quantized language model small enough to run on an 8-bit Z80 processor. Train conversational models in Python, export them as CP/M .COM binaries, and chat with your vintage computer.
Project last updated：04/29/26
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Why we included this project
Z80-μLM pushes a language model down to the smallest practical scale: 2-bit weights and 16-bit integer math packed into a ~40KB binary that runs on a 4MHz Z80 with just 64KB of RAM. You train a conversational model in Python, export it as a CP/M .COM file, and chat with it on an emulator or real vintage hardware. The included examples, a terse chatbot and a 20-questions game, give quick tangible results. For anyone curious about quantization and extreme resource limits, the project is a clear walkthrough from training to a working binary, which makes it a good learning resource and a fun retrocomputing experiment.
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