I played around with that one a couple of years ago. Kevin sent me his 7-bit electronic dump, but I guess I didn't update the files on my page. It was a pain to visually dump because there's so little contrast. The O output PLA isn't set up for 7-segment display, so no hints there. I guess you didn't get any music from any of the R-outputs? That die is interesting because it's the only TMS1000 rev F that I've seen.