gnuboy emulates the Color GameBoy handheld console in portable C with
interfaces for X11, Linux fbcon and svgalib, SDL, DOS, and Windows,
with other ports planned in the future. Compatibility with ROMs tested
is around 99 percent, and all major hardware features except SGB
extensions are supported. With the optional optimized i386 assembly
code, gnuboy can run at the full 60 FPS even on Pentium/75s and below.