On Tue, 6 Jun 2000, Keith Owens wrote:
> At the end of do_nmi are these instructions
>
> outb(0x8f, 0x70);
> inb(0x71); /* dummy */
> outb(0x0f, 0x70);
> inb(0x71); /* dummy */
I've always used dummy inb things to make sure the timing is right. When
doing 2 outb's right after each other, the thing (probably the int
controller) might get confused.
I'd like to be corrected if I'm talking nonsense.
> If the NMI is for the watchdog, these instructions are bypassed.
>
> (1) Why do we need these instructions?
> (2) Why does nmi_watchdog_tick bypass them?
No idea...
Igmar
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