Can anyone here shed some more light on the sharp PC4500, the IBM basic question? ---------- Forwarded Message ---------- Thank you for your reply. I have a Sharp laptop PC4500 that still works. I don't have a manual for it, and am curious about the unit. There are two expansion slots inside the unit. I was wondering if I can use a mouse with it, but there aren't any ports for a mouse. It has two parallel port connectors only on the outside of the unit. Also, I am looking for an IBM unit with the BASIC code in the ROM. I have a game written in BASIC dating from about 1984 that won't work with GWBASIC. I am curious whether it actually works on an actual IBM (i.e. not clone) unit.