[LinuxBIOS] IRQ question

Peter Stuge peter at stuge.se
Thu Nov 15 04:14:49 CET 2007


On Thu, Nov 15, 2007 at 11:05:57AM +0800, Feng, Libo wrote:
> A simple question:

But a very good one!

> when talking about IRQ, you mean one of the 256 interrupt vectors
> within x86,

No, these are never called IRQs, but they are often called
interrupts, and IRQs are also often called interrupts. Usually
not in the same context though.

> or one of the pins of APIC, or one of the pins of 8259?

Yes, this is it. Whether it's APIC or PIC depends on the board
and configuration, but IRQ is about the physical signals or at the
least something relating to the interrupt controllers.

> I always got confused by it.

Quite alright. :)


More information about the coreboot mailing list