Yabause Wii is a Sega Saturn emulator for Wii and is the first of its kind as emulating the complex processes of the Sega Saturn is much harder then it looks and now even harder to run it on the limited hardware of the Wii.

Changes:

add “additive” special color calculation mode
fix color bug owing to endian
use inline assembler in the mulfixed-function (used in RBG0 and RBG1) for speed up (but a little..)
some minor fixes and changes

http://wiibrew.org/wiki/Yabause_Wii