It should be a natural fit: cartridge games running on palmtop computers. However, to date, there haven't been many compelling games for handheld devices.

The situation improved last week as software vendor Gambit Studios released Liberty, its emulator for Nintendo of America's GameBoy device. Emulation is the process by which a program can entirely mimic the functions of another computer and thus is able to run the other machine's software

The Liberty emulator, available for $16.95 at Gambit's Web site (see link below), allows owners of any PalmOS-compatible handheld to play GameBoy games on their palmtops.

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