Piotr Wyderski wrote:
Terje Mathisen wrote:
so a buggy driver had less chance of messing up some
unrelated hardware/software subsystem.

Direct access to physical memory == no security, no
matter which protection ring it runs at.

Afair the key idea was to help driver writers catch bugs, not to
guarantee security which is effectively impossible for anything that can
access hw directly.

Terje

--
- Terje.Mathisen at tmsw.no
"almost all programming can be viewed as an exercise in caching"