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

mal - Make a Lisp

An introduction to ARM64 assembly on Apple Silicon Macs

bootOS is a monolithic operating system in 512 bytes of x86 machine code.

A minimal snake in assembly

Fully documented and annotated source code for Elite on the Nintendo Entertainment System (NES)

A tiny x86 retro computer

CP/M for the 6502

Ray Tracer in 483 bytes (x86 boot sector)

Pi number calculator using 8088 assembly language

Simple VGA solution for 6502 homebrew computers

Guides and example software to allow the use of a TFT screen and Controller with a Ben Eater style 6502 computer with minor modifications. If this is useful to you, please do feel free to buy me a …

rjsc5 a 16-bit RISC-V CPU