Mesen the nes emulator has updated to version 0.8.1
Performance: Code improvements have increased emulation speed by 15-35%.
Audio: Added a customizable equalizer.
Patches: Added support for UPS and BPS patch formats.
Compatibility: Added support for UNIF FK23C/FK23CA/D1038 boards and mapper 104.
PPU: Added option to emulate OAM RAM decay.
PAL: Improved PPU emulation accuracy.
MMC5: Improved emulation accuracy.
FDS: Improved IRQ emulation accuracy (fixes Lutter and some unlicensed games).
Emulation: Fixed problem that caused in-game crashes in the "Legend of Link" romhack.
Misc: Several small bug fixes.