SimCoupe emulates a SAM Coupe - an 8-bit, Z80-based home computer released in 1989 by Miles Gordon Technology.
For more information on the machine itself, including history and technical specification you can go on http://www.simcoupe.org
Originally developed for UNIX and DOS systems by Allan Skillman, it has been then improved and ported to SDL by Simon Owen, Dave Laundon.
GP2X-SIm is a port of the CVS version 0.90 beta 4 of SamCoupe.
How to use it ? Everything is in the README.txt file.