All the sources (Schematics, PCB, VHDL, BIOS sources) for the M8SBC-486. This project is a 486 Homebrew computer, with some efforts to make it kinda PC compatible

Instructions on how to install modern Gentoo Linux on ancient 486-based PCs.

A x86 PC emulator written in Java

RustChain DOS Miner for 8086/286/386/486/Pentium - Fossil Edition

A Linux distribution for 486 and Pentium (P5) vintage PCs

Slides on how Wolf and maybe one day other ID games worked

A 3D turn based adventure for 8, 16 and 32-bit retro and modern platforms; you're a space trashman with a simple mission (Remake of a remake of a remake of a remake)

One of the first Vibecoded Operating Systems, and Lightweight.

PTSource Mulinux is a dedicated initiative focused on maintaining and sustaining the legacy of professor Michele Andreoli's MuLinux project. MuLinux, renowned for its minimalistic design, is a lightweight, flexible Linux distribution that can run on older hardware with limited resources.

Kicad library for 486 CPU socket

FN-DOS is a 16bit x86 operating system.

Small application to fix CHS boot issues on older machines

Research fork of crazii/USBDDOS with targeted fixes for OHCI USB driver bugs on 386–486/Pentium DOS hardware — NEC µPD720101, ALi M5237, SiS 7001, OPTi 82C861. Patched ClearPortFeature spec violation, BIOS handoff timeouts, Legacy Support disable, and defensive HCD cleanup. Upstream tracker.

The OG, DOOM just like it was in 1993. Big chunky pixels. Sound Blaster tunes. No modern stuff.

You move the red cursor and must capture all chaotic particles (the gray squares) before the time runs out (the red bar).

Yet another 486 L2 cache adapter

486 Cpu Interposer

x86 PC (486-class) core for retroDE — DE25-Nano (Agilex 5) port of the MiSTer ao486 core. Boots DOS, runs early Windows, and a wide swath of 486-era software.

XOS is self-hosting, 32bit 80486-based multitasking hobby operating system written in C, using Open Watcom toolchain.