bsnes v082.
This release features many substantial Game Boy emulation improvements (all courtesy of Jonas Quinn), a new audio DSP class, and BPS patching support.
Changelog:
added new DSP audio engine; supports sample-averaging for the Game Boy's high frequency rate
GB: MMM01 images with boot loader at bottom of ROM can now be loaded
GB: EI is delayed one cycle; fixes Bubble Bobble [Jonas Quinn]
GB: fixed window -7 offset behavior; fixes Contra 3 first boss [Jonas Quinn]
GB: disable LCD interrupts when rendering is off; fixes Super Mario Land 2 [Jonas Quinn]
GB: fixed noise channel LFSR; fixes Zelda: LA lightning sound [Jonas Quinn]
GB: square channels use initial_length like the noise channel [Jonas Quinn]
UI: added BPS patching support; removed UPS patching support
UI: when loading BS-X/Sufami Turbo/Game Boy games; display game title instead of BIOS title
UI: modified timestamps on screenshots for Windows/NTFS (which disallows use of ':')
http://code.google.com/p/bsnes/downloads/list