Modran has updated his “Merlin” simulator for the GP2x. Check posting number five for the download.

More information about the Merlin from Wikipedia:

Merlin took the form of a rectangular device about eight inches long and three inches wide. The play area of the game consisted of a matrix of eleven buttons; each button contained a red LED. The array was encased in a red plastic housing, bearing a slight resemblance to an overgrown touch-tone telephone. Four game-selection and control buttons were also placed at the bottom of the unit; a speaker took up the top section. Supporting electronics (including a simple microprocessor) were contained within the shell of the game.

http://forum.gp2x.de/viewtopic.php?t=4136