Hi captainleeward,
just had another thought, can you beg, borrow, steal, or worse buy another BOB, just a plain one with no built in drivers but one with LEDs
on the outputs? It would confirm whether M3/PP is producing pulses.
At the moment you can't tell. It is possible to probe the PP with a multimeter but one slip with a probe and you risk blowing the TTL inside
the PP. I try to avoid probing the PP whether with multimeter or oscilloscope unless I have insulated contacts that fit perfectly, replacing
chips on a PC mother board is a hit and miss proposition at best!
Craig