Here's a pic the signals that are readily available . . .

. . . on the unimplemented SIP thru-holes on the SuperMac PDS Adapter.



All these signal connections have been double checked/buzzed and certified . . .

. . . haven't done more than a rudimentary count of Data & Address lines yet, but they're all there! :approve:

The rest remain Sanskrit for the time being . . . :