The 2 quiz books that I've gotten had a piece of plastic riveted over the cartridge so you can't see the connections, and I had to break it to see them. You could pin them out with an ohmmeter.
In the handheld version, each cart pin is connected to one of the number buttons (number buttons 0 and 6 excluded): cart pin 1 to number button 1, cart 2 to #3, cart 3 to #7, cart 4 to #5, cart 5 to #4, cart 6 to #2, cart 7 to #8 and cart 8 to #9. #4 is grounded and #5 is tied high. Cart #1 connects number buttons 1, 3 and 7 to 5 and number buttons 2, 8 and 9 to 4. That makes sense to me: every number button is either tied high or low. I wrote a program using that logic that generates the 1001 answers to quiz book 1. But the patent shows cart #8 as connecting number buttons 1 and 4, 2 and 3, 5 and 9, and 7 and 8. That ties 1 low and 9 high, but leaves 2, 3, 7 and 8 floating. When I use that logic in my program, the answers are heavily weighted to Cs and Ds; 76% are one of those two, and only 10% are A. I haven't seen quiz book 8, so that might be correct, but it seems odd. Or am I missing something?
It's possible that the tabletop version only works with some of the quiz books; the tabletop game can only detect which cart pins are connected to pin 4. This is sufficient if all carts tie every pin either high or low, but would be ambiguous for carts that have some pins floating. So maybe the cart 8 in the patent was mis-drawn. If all carts tie every pin either high or low, there are a total of 64 different possibilities.
