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The author implemented a full stack for running large language models on hardware from scratch, including the model, GPU instruction set, compiler, and simulator, to make each layer understandable. The project is open-sourced on GitHub.
Chiplab is a product that lets you test firmware on a virtual chip without needing physical hardware.
The Visual 6502 is a JavaScript-based simulator that provides a visual, transistor-level simulation of the 6502 microprocessor, designed for educational and reverse-engineering purposes.
VirtualPC is an open-source 8-bit computer simulator that can train small neural networks from assembly code, demonstrating machine learning at the bare-metal level.
S-100 Virtual Workbench is a tool for emulating or simulating S-100 bus systems, enabling retro computing enthusiasts to experiment with vintage hardware virtually.