>Which GENERIC kernel have you tried?  I think that the support for 
>Quadra-style ADB is in the latest GENERIC kernels, but I could be wrong.  
>Anyone else know about this for sure?

Colin,

Yasuhiro is correct, the ADB support is incomplete on the Quadra-950.  He 
and I worked on it and found some additional ROM routines wheich were 
bing called, but it's going to take a lot more work.

-bob