I just got a hp5004a , trying to use it to help repair a sick

centipede board. I built a NOP adapter (processor and socket)

It works perfectly. Signatures match the docs for the NOP adapter but they do NOT match what is published on the centipede schematics starting right at the micro. What Am I missing here? Is there something about the cat box I'm not taking into account here. Anyone out there using the HP5004a with centipede?

Steve