Mine is an '82, and currently disassembled on the bench awaiting the arrival of my Digi-Key order so I can replace the old Rifa smoke generators before they pop, but this was all in prelude to trying my hand at Turbo Pascal on the thing. Probably not a game, but definitely not a word processor or terminal program.

Might I ask what terminal program you're using? I PIP'd enough code over the serial port to assemble a basic Xmodem client, but it's unreliable in use.