DOOM

Fork of id-Software/DOOM — reference source for the Unheaded Protocol Computer (UPC)

This is id Software's original DOOM source code (released 1997 under GPL-2.0), preserved as reference material for the Unheaded project. The source is unmodified — all UPC integration work lives in the companion doomgeneric repository.

Why This Fork Exists

The Unheaded Protocol Computer runs DOOM compiled to MBC bytecode inside eBPF/XDP programs. The compilation pipeline starts here:

This repo (original C source)
    │
    ▼  doomgeneric platform layer + libc stubs
    │
doomgeneric repo (portable DOOM + UPC integration)
    │
    ▼  riscv64-unknown-elf-gcc -march=rv32i
    │
doom.elf (RISC-V 32-bit ELF)
    │
    ▼  rv32i_to_mbc (Rust translator)
    │
doom.mbc → loaded into BPF maps → executed by XDP programs

This fork preserves the original source as the canonical reference. See doomgeneric for the actual UPC integration, build pipeline, and running DOOM over IPv6.

Directory Structure

Directory	Contents
linuxdoom-1.10/	The DOOM engine — renderer, game logic, networking, sound
sndserv/	Sound server (separate process, IPC to game)
sersrc/	Serial/modem driver for multiplayer
ipx/	IPX network driver for multiplayer

Original Documentation

The original release notes from id Software are in README.TXT.

Related Repositories

• unheaded/doomgeneric — portable DOOM engine + UPC integration (Go, eBPF, MBC bytecode, browser viewer)
• unheaded/unheaded — the Unheaded Protocol — full protocol stack and compute platform

License

GPL-2.0 — see LICENSE.TXT

Credits

• id Software / John Carmack — original DOOM engine (1993, GPL release 1997)
• Unheaded — UPC adaptation