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The original sources of MS-DOS 1.25, 2.0, and 4.0 for reference purposes
A running-jumping-swordfighting game I made on the Apple II from 1985-89
A book teaching assembly language programming on the ARM 64 bit ISA. Along the way, good programming practices and insights into code development are offered which apply directly to higher level la…
Official repository for 8086tiny: a tiny PC emulator/virtual machine
The development kit for over a hundred z80 family machines - c compiler, assembler, linker, libraries.
An Operating System for Z80 computers, written in assembly
The open-source city building game for Game Boy Color.
Source code of GEOS 2.0 for the Commodore 64 and 128
Command-line cross-compiler of assembly language for Z80 CPU.
Fully annotated disassembly of the original Metal Gear game (MSX2, Konami, 1987, RC750)
The source from my Commodore 64 assembly programming tutorial for Windows
A modern, scratch-built, open-source (GPLv3) alternative ROM BIOS for PC, XT, 8088 Clone or Turbo PCs.
😀 The Acid2 test, now for the original Game Boy! 😀
Source code of some NES games
An annotated disassembly with supplemental materials of the Contra (US) and Probotector NES game.
Decompilation/disassembly of Fire Emblem: The Sacred Stones
A Z-machine interpreter for the Commodore 64 and similar computers
Mooneye Test Suite is a suite of Game Boy test ROMs
The MSX Red Book in Markdown format.
Z80 / 8080 / Z180 / Z80next assembler (for unix-style OS)
fan respository - not official - os linux made with assembly language
Collection of ZX Spectrum annotated game source code dissasemblies as .skool files