Headoverheel had his finger on the Final Burn Advance GP2x port recently and has given following improvements:

– Frame limiter and autoframeskip.
– Fps counter (L+R+Y)
– Added Craigix Ram Timmings.
– Volume control.
– Now you can exit from the emulator with L+R+START
– Button mapping modified for vertical games(VOL_UP & VOL_DOWN to Fire , L & R to change volume)
– A few changes and optimizations here and there :p

http://www.gp32x.com/board/index.php?showtopic=39755