esp32sim

ESP32 Bit Pirate is open-source ESP32-S3 firmware that turns supported development boards into multi-protocol hardware development and analysis tools, inspired by the Bus Pirate. It provides a command-line interface over USB serial or Wi-Fi web serial for sniffing, sending, testing, and scripting wired protocols such as I2C, SPI, UART, 1-Wire, CAN, GPIO, JTAG, and USB, as well as wireless technologies including Bluetooth, Wi-Fi, Sub-GHz, RFID, infrared, LoRa, and FM. The firmware includes protocol-specific tools such as EEPROM and flash access, UART bridges, device scanning, signal recording and replay, radio analysis, PWM and direct I/O control, and Bus Pirate-style bytecode or Python scripting. The project supports several ESP32-S3-based boards, including ESP32-S3 Dev Kits, M5Stack devices, and LILYGO boards, and provides web tools, hardware guides, recipes, and documentation through its project website.

c64-hw-sim is a Commodore 64 motherboard simulator for the ASSY 250407 board. It models the board's 216 parts and 249 electrical nets at pin level, including the 6510, VIC-II, CIAs, SID, RAM, ROMs, logic chips, PLA equations, and discrete components. Users can lift or short individual pins, remove chips, open resistors or other connections, and observe the resulting monitor output, keyboard behavior, logic states, and oscilloscope signals. Its simulated netlist and chip behavior compute fault symptoms from the circuit rather than selecting predefined results; the simulator can also load .prg programs, run headlessly, apply timed faults, inspect bus contention, and record graphical output. It builds with make for macOS and Linux with X11 and OpenGL. The project is intended for studying C64 hardware and investigating repair hypotheses, not for playing games, and runs below real-time because every chip pin is simulated. Its models do not include the video output, SID filter, power supply, or dot-clock PLL, and the analog floating-line and power-fault values are approximations.

An open-source project that runs a 28.9-million-parameter language model locally on an ESP32-S3 microcontroller, without network connectivity. It uses a tiered memory layout based on Per-Layer Embeddings: frequently accessed activations and normalization weights stay in SRAM, the model core and output head reside in PSRAM, and a roughly 25-million-parameter embedding table is stored in flash; only the few rows needed for each token are read into faster memory. The included TinyStories model generates short stories, while a Barista model provides espresso question answering. The repository notes that the TinyStories model is not designed for general question answering, instruction following, code generation, or factual knowledge, and provides separate scripts for downloading and verifying model assets and deploying a selected model to the board.

A browser-based emulator embedding toolkit that lets websites run supported game titles in the browser. Distributed from emulatorjs.org, it provides JavaScript code for loading emulator cores and ROM files (local upload or hosted) and for playing games in modern web browsers.