>	if I understod You correct, You would like to force switch into supervisor
>mode from user task (running under NetBSD). If so - there's no way because 
>kernel 
>cannot let You to do it.
>	In general right way is to set appropriate bit in MSW. Look at PowerPC
>documentation for details.

Actually, I'm in MacOS, in a user task.  I have a theory on changing the 
bus error vector and then causing a bus error... but I'm not completely 
sure.

- Chris Jacobson