In message <43E1F4DD.9020306@update.uu.se>, Johnny Billquist writes:
>Um? Not entirely true.
>You don't need locked bus cycles for atomic operations which actually 
>are atomic on the bus.
>A write is a write is a write. It can never be split. It's atomic. Can't 
>be anything else.

What if it's doing a write across a page boundary, and the second page 
isn't there?

		--Steven M. Bellovin, http://www.cs.columbia.edu/~smb