Gpfce is a Nintendo Entertainment Systeme (NES) for GP2x.

Release notes from Notaz:

Gpfce finally fixes the long standing bug in SMB3 involving missing ground (I hope). But I have not added complete open bus emulation (open bus emulation inaccuracies were the cause of the problem), because most other games don’t seem to require it. It would be nice is somebody played SMB3 from start to completion without using warps and reported back.

Changes:

Improved open bus emulation, fixes missing ground in some SMB3 levels.
Improved auto frameskip behavior in cases when emu is not fast enough to maintain 50/60 fps.
Fixed a bug which prevented some key combo configurations from working.
Some other minor changes.

http://notaz.gp2x.de/releases/gpfce/gpfce_v04_r313.zip
http://notaz.gp2x.de/releases/gpfce/gpfce_v04_r313.tar.bz2

http://www.gp32x.com/board/index.php?act=ST&f=42&t=39633