The original sources of MS-DOS 1.25, 2.0, and 4.0 for reference purposes

Continuous Unix commit history from 1970 until today

A running-jumping-swordfighting game I made on the Apple II from 1985-89

CPU miner for Litecoin and Bitcoin

The development kit for over a hundred z80 family machines - c compiler, assembler, linker, libraries.

libbpg (copy of the source code for easy access)

A wifi webradio with only low cost boards ESP8266 and VS1053 by Jp Cocatrix

STM8 eForth - a user friendly Forth for simple µCs with docs

For latest source, please see: https://github.com/blockchain/My-Wallet-V3-iOS

RISC-V CPU for OpenFPGAs, in Icestudio

TritiLED: multi-year LED glow markers

"Anyone who has brought up CP/M on a homebuilt computer has felt this moment of elation. A myriad of connections are properly closed; bits are flying at lightning speeds over busses and through cir…

The Noiseplug, an ATtiny9 µC playing a chiptune

Jacdac firmware for PADAUK

ATtiny Candle is a small development kit that is based on Microchip ATtiny85 and ATtiny13 MCU

Parts of building secure communication module on Arduino Nano based on AVR CRYPTO LIB (http://avrcryptolib.das-labor.org/trac). This module was responsible for encrpyted/decrypted transfering data …