FCEUltra Win32 mappers modified 13.05.2010 is released.This emulator is based on FCEUltra source code.

FCEUltra Win32 mappers modified 13.05.2010 Changelog:
- mapper 121 - finally worked for all games (still hacky);
- mapper 121 - redefined with CRC check "Sonic 3D Blast 6 (Unl)" and "Street Fighter Zero 2 '97 (Unl) [!]";
- mapper 187 - removed mapper 121 leftovers;
- mapper 228 - fixed, save regs added;
- fixed ines loading, "Action 52" now works fine.

Download: FCEUltra Win32 mappers modified 13.05.2010
Source:Here