Nikon Hacker

Would anyone know the specs of the D70(s) diagnose adapter connector and the pinout. It's a serial connection, most likely on the same voltage levels as the 10-pin connector on the (semi)-pro models. I'd like to get a bunch of D70(s) cameras connected so I can swap out compression boards and do other stuff with them. Ideally, I'd like to get a cheap(ish) official Nikon tool, but those appear to be rarer than hens teeth.