I used to play multiplayer DOOM over parallel port in 1994. https://www.doomworld.com/files/file/836-parallel-link-driver-for-doom/ https://www.doomworld.com/f

I used to play multiplayer DOOM over parallel port in 1994. https://www.doomworld.com/files/file/836-parallel-link-driver-for-doom/ https://www.doomworld.com/files/file/836-parallel-link-drive...