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Doom 550D v0.2.0 beta 1

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@lauris-nl lauris-nl released this 16 Jul 05:35
· 17 commits to main since this release
v0.2.0-beta.1
48101b4

Doom 550D v0.2.0-beta.1

This beta was tested on a Canon EOS 550D with firmware 1.0.9. The installed
doom.mo was marked very good after physical-camera testing.

Highlights

  • Select up to 32 Doom-family IWADs from the Magic Lantern Games menu.
  • Keep savegames strictly separated for every WAD filename.
  • Persist Doom menu, music-volume, and sound-effect settings.
  • Play MUS music and mix it with Doom sound effects through the camera speaker.
  • Restore Magic Lantern input, display, palette, and audio state on exit.

Important fixes

  • Canon file reads are split into chunks accepted by Magic Lantern FIO.
  • Save paths use short hashed names and are checked before the game starts.
  • Virtual camera-control codes 160-163 now survive saving and reloading, fixing
    SET/fire, PLAY/use, and both strafe controls after a camera restart.
  • WAD changes within one camera session are blocked to prevent mixed engine
    state and memory corruption.

Installation and compatibility

  • Target: Canon EOS 550D / Rebel T2i / Kiss X4, firmware 1.0.9 only.
  • Install as ML/MODULES/doom.mo.
  • Use a matching Magic Lantern autoexec.bin and 550D_109.sym.
  • Copy legally obtained Doom-compatible IWADs to ML/DOOM/.
  • Restart the camera after changing the selected WAD.

The required Canon audio stubs are already present in the documented Magic
Lantern base commit; no Doom-specific core modification is required. An older
Magic Lantern build must be replaced or rebuilt if its symbol file does not
export the audio functions listed in the README.

No WAD files or other copyrighted game assets are included.

Known limitations

  • The selector checks .wad plus the IWAD header but does not yet fully
    reject non-Doom games.
  • PWAD/mod loading is not implemented.
  • Music currently uses a low-CPU square-wave synthesizer.
  • WAD switching requires a camera restart.
  • Multiplayer is not supported.
  • Logs retain only the most recent run.

Release binary

doom.mo
SHA-256: a8c32cdf85231079f0ee7ad3ccbcb065792483ae9759c911640526c3d77446b8
Assets 3
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