A little searching and I turned up this thread;
And what-da-ya-know, it actually works. I wrote my first commercial program (game) back in 1982, and for the first time in around 30 years, I've just seen it run. Just for the record, this was around 2.5k of Assembler for the game itself and 4k of Basic for the intro screen / hi-score. You don't fit much code these days into 2.5k of RAM .. how times have changed!