Rare IIfx Accelerator?

Today I got a Mac Nubus card in the mail and was told it was a Tokamac Accelerator. The Card has written on it : Donoho Design Group, Inc Copyright 1992 PN: 04-106 with a hand written paper tag on the back (219-2525-360). Its a full length card with 2 connectors (NUBUS and PDS inline). The card fits in my IIfx perfectly. Besides the 68040/33 processor there are 3 chips labeled "Toruc", "Nexus", "Fusor" on the card (xilinx xc 3030-100 type chips). If this card the Tokamac IIfx or do I have something else? If so where can I find drivers for this beast (havn't had any luck so far with google and old Mac driver sites). Cards of this vintage are usualy hard to find drivers for, any old Mac packrats here? Sincs its from 1992 and not a common part I assume its ontopic to ask about it.