Re: [PATCH] NMI trap revised (was Re: NMI errors in 2.0.30??)

Riccardo Facchetti (
Fri, 9 May 1997 22:32:54 +0200 (MET DST)

On Fri, 9 May 1997, Martin Mares wrote:

> 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 ?