> After studying lots of specs and testing it on several motherboards, it
> seems that those bits are implemented almost everywhere and hard-wired to zeroes
> on the remaining MB's. We probably should honor them and report the reason
> to the user if we find any.
This seems to be a Good News (tm).
So if at boot we check writablity of bit 2 and 3 we can know if this
mechanism is implemented or not ?
We can do the test at trap_init() level. So we know how to (or not to)
deal with NMIs.
Just another thing. Can we rely on the bit 7 of the port 0x70 ?
Ciao,
Riccardo.