bero has made some advances with his Dreamcast SDL project

SDL 1.2.4 has been updated to beta2 and now includes:

-OpenGL support
-Hardware page flip support

The SDL_mixer has now been ported

-bit modified for default path

SDL_mixer description:

SDL_mixer is a sample multi-channel audio mixer library.
It supports any number of simultaneously playing channels of 16 bit stereo audio, plus a single channel of music, mixed by the popular MikMod MOD, Timidity MIDI, Ogg Vorbis, and SMPEG MP3 libraries.

And the SDL version of Doom “prboom” is now available

-this port is example for testing SDL and SDL_mixer. so, I’m not imprement Dreamcast specific usability, for example, joystick only handling, Visual Memory save, mod-menu etc

Download and updates are available from here!