A novel solution to the pincount problem.
@NanoRaptor
DEC tried the equivalent for board edge connectors:
the PDP-6's ALU was Bit Sliced. Each slice board had 4 sets of edge connector finger contacts.
2 sets went into the rigid bus backplane.
2 more sets on opposite end of board were jumpered by a flexible wire bus with 9 or more connectors, which prevented the simple board swap diagnostics practice by DEC Field Circushttps://en.wikipedia.org/wiki/PDP-6#Hardware