I haven't looked at this for a while, but it seems that I guessed at pin numbering based on the PCB. I've got pin 3 in the upper left, with numbering going CCW. The chip was a 42-pin QIL, but there are only 31 pads on the die. It looks like pins 21-22, 27-33 and 40-41 were N/Cs to the die.

I transcribed the raw bits, but since I had no idea of the instruction set, I didn't try to figure out how to put them in logical order. www.seanriddle.com/bsgraw.bin