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:

change directory structure from old “/SSROMS” directory to each subdirectories under “/yabause” directory
add new internal backup ram saving mode: save in each game
activate threading scsp2 using mutex
avoid freezing in some vdp1 commands
some minor fixes and changes

http://wiibrew.org/wiki/Yabause_Wii