Are there any ICs on the IIx adapter? I don't remember. If there isn't any Conversion Logic to noodle out, then it's a straight PCB Layout, no schematic required. Can you take good pics of the board, or scans of the flat side, if there is one . . .

. . . ISTR the bottom side looks like a freakin' hedgehog! :lol:

I'd rather see effort spent on getting a G3 or G4 onto a card like the PowerCache, the IIci PPC Upgrade Card would be the place to start unraveling . . .

. . . the cobweb of specs for that particular hack! }