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

Modern builds for the 90s/00s DECtalk text-to-speech application.

Historical source code for Infocom's Z-machine interpreters

MII Apple //e Emulator for Linux

Manipulate Atari 800 .ATR images. Convert between .ATR and .IMD (ImageDisk) formats.

ScottCom - TI99 Scott Adams game compiler

LPC analysis tool for the Texas Instruments TMS5220 chip

Java-based tool to inspect and change disk images for TI-99 family emulations

TI-99/4A to Raspberry PI messaging through console sideport

Emulator (V9t9 and others)

xdt99: TMS 99xx Cross-Development Tools

Atari 8-bit computer and 5200 console emulator

Apple II Disk Browser

open/read/write files in ProDOS filesystem

Disassembly of the Apple II Desktop - ProDOS GUI

Ultima IV Remastered for the Apple II

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

Random number generators for 6502 / NES

cc65 - a freeware C compiler for 6502 based systems

Davex is a command-line shell for the Apple II family of computers. Davex runs on ProDOS 8, and a subset of functionality is ported to SOS.

The core software distribution for the Inform 7 programming language.

Texas Instruments 99 Home Computer Emulator

Scott Adams adventure toolkit: compile, decompile and play 80s-style adventure games

Source code for a 1977 version of Zork

The original source code of Microsoft GW-BASIC from 1983

Set of Python bindings to C++ libraries which provides full HW acceleration for video decoding, encoding and GPU-accelerated color space and pixel format conversions

http://shamusworld.gotdns.org/git/virtualjaguar

Inform 7 extensions -- some may be ready for public use, others may be barely working experiments. Enjoy!

Formatting technology for Swift source code

Libav github mirror, clone of git://git.libav.org/libav