Getting Doom to run on things that were never meant to run Doom is something of a cottage industry among a die-hard subset of PC hackers and coders. Your motherboard's BIOS, a bunch of old potatoes, a Lego brick, a home pregnancy test: The list goes on and on. But YouTuber and Doomworld community member kgsws has set a new standard for, well, something with this brilliant bit of techno-recursion: Doom running in Doom...
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Doom hacker gets Doom running in Doom
Source: PC Gamer (opens in a new tab)