In article <1fts6hw.10iyyfq6d9vanM%manu@netbsd.org>,
Emmanuel Dreyfus <manu@netbsd.org> wrote:

>The kernel low level drivers and the userland programs that use them
>communicate using a page of shared memory, for performance sake. This
>page contains information such as the mouse button status

Is that page mapped by default? Or you need to open a device to map it?

christos