userspace drivers

[Robert Millan]

Hi!

I'd like to play a bit with userspace drivers, but i have some
doubts on the interfaces:

- how can i wait for a hardware interruption in a userspace process?
- despite it's not necessary due to a well-known bug, how
can i ask Mach for permission to access io ports?

also, is there any ongoing work on userspace drivers, so i
can avoid duplicating it?

thanks!

-- 
Robert Millan

"Omnis enim res, quad dando non deficit, dum habetur et non datur,
nondum habetur, quomodo habenda est."

"For if a thing is not diminished by being shared with others, it is
not rightly owned if it is only owned and not shared." 

                Aurelius Augustinus (354-430)