DOOM now runs on the Casio Loopy, one of the most obscure consoles ever made

Released in Japan in 1995, the Casio Loopy is a home console built around a 16 MHz Hitachi SH-1 processor, with 1MB of RAM and 2MB of ROM, best known for its built-in thermal printer that let players print stickers straight from the screen. It only stayed on the market for about a year and ended up with a catalog of just eleven games, officially aimed at the narrow, heavily targeted market of young Japanese girl gamers of the era.

Frustrated that id Software never brought DOOM to such a peculiar machine, developer Throaty Mumbo set out to fix that oversight. The result builds on PrBoom and GBADoom as a base, fully reworked with a brand-new rendering backend tailored to the Loopy's video controller, timers, gamepad, and sound chip.

Due to space constraints, the console's 2MB ROM (expandable to 4MB via a FloopyDrive cartridge) only leaves room for a handful of levels, and performance remains at the unoptimized tech-demo stage, running at low resolution; amusingly, the console's built-in thermal printer still works fully while playing, a feature no contemporary Nintendo or Sega console could claim.

The port's full source code is freely available on Throaty Mumbo's GitHub repository; to run it on real Casio Loopy hardware, players need a FloopyDrive cartridge, a modern ROM loader built specifically for the console.

Source: Hackaday