On 1/9/07, Mark Knecht <markknecht@xxxxxxxxx> wrote:
Keep in mind that on most machines IRQ's are *not* freely assignable
entities. Most machines restrict the PCI IRQ's to a certain group and
then share them with other hardware on the motherboard on a slot by
slot basis. This is hard wired in the PC board traces on the
motherboard. If the MB designer hooks the hard drive IRQ (say IRQ 14)
to PCI slot 2 then there is nothing you can do to change the fact that
they are shared.
yeah i know that. my mobo for example doesn't let assign freely the irq on
every pci slot, they're assigned automatically. and even removing the card,
resetting the "escd" and then plugging again nothing will change.
The most you can do in this case is change the IRQ #. In the case
above, if you changed the AGP VGA IRQ to 12, PCI slot #1 would also
become IRQ 12 since they are tied together using a motherboard trace.
how would i change the IRQ # if my mobo bios don't allow this ?
Hope this helps clarify a bit,
Mark