Unknown card in PDS slot

I would suggest hitting archive.org, going to Formac's homepage for around the dates when the 650 was a current or just-deleted product, and seeing if you can find any documentation there.  With luck you might even find a driver.

ISTR, OP's already been there, done that, come up dry and then emailed Formac w/no response, not positive on the archive though.

Riddle answers = TattleTech NuBus/PDS Report/Guage Pro's SlotInfo Results. Waaaay past time for posting those.  :