Yeah, the demo unit I was originally allowed to use was Apple only. At some point my parents were able to purchase the "Alphasmart Pro" for me which according

Yeah, the demo unit I was originally allowed to use was Apple only. At some point my parents were able to purchase the "Alphasmart Pro" for me which according to Wikipedia is their second model that added PS/2 support. And you are right, I totally forgot about that extra ADB port on the apple keyboard!