Using Encryption might be a good idea, if in the future, when the RAM expander is out, people start making shareware games, and the full copies could be sold at like $3 or something. Then, the full game would be secure from other calcs copying. And with the expander, paying $3 might be an ok deal, because the games could be so much bigger and more advanced. Tony Karels akarels@citilink.com http://www.citilink.com/~akarels/