Low-tech way to determine order of cards plugged into controller board

by Zachary Russell Heineman   Last Updated September 11, 2019 15:25 PM

I have a master controller PCB with sockets 0-5. I have module PCBs A-F that plug into the sockets in an unknown order. I am wondering if there is a simple way for the master controller to know the ordering of the module PCBs. (In the digram it would be [C, E, A, B, F, D].) There is one "signal" line drawn but additional ones could be added (or additional components/circuitry).

Controller bus with card modules

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