This may be a really dumb question but I've just downloaded the ROM for Defender (Red) and tried to run it via MameCE on a Casio EM-500 (MIPS). I get a screen telling me to press "OK" if I really own the ROM. I don't have a keyboard and I can't call up the onscreen version. How do I type "OK" ?

Russ Smith,
retrogamer newbie