MSU1
From Retro Gooning
What is the MSU1?
Higan (formerly known as BSNES) developer Byuu decided that snes games could use more FMVs and CD quality music, so he decided to make an enhancement chip for that. Seriously. Also allows up to 4 GB roms, I'm sure someone is working on the longest SMW romhack right now.
What can I do with it?
Super Road Blaster The laserdisc classic ported as a massive fuck you to the Sega-CD.
