>The Quadra 605 is _exactly_ the same as the Performa 475...as a matter of
>fact, my Quadra 605 has the name "Macintosh Performa" imprinted on the
>front.

The Gestalt ID for the Quadra 605 is 94 and the Gestalt ID for the 
Performa 475 is 89. So at this level the two are not _exactly_ identical 
even if you change the faceplate.  If you dig a bit deeper into the ROMs 
you'll find that although the two share many common routines, they use 
some different sequences for ADB interrupt handling.  From a NetBSD point 
of view, if your Kernel is built on the MRG routines, the two systems are 
not _exactly_ the same, but very similar.

-bob