Author Topic: Duck, here is the IRQ sharing info  (Read 549 times)

whels1

  • Guest
Duck, here is the IRQ sharing info
« on: January 05, 2001, 01:26:00 PM »
>
> > get the latest drivers and dont install DOS support when install them(it
> > takes an irq)
> > or
> > disable sb16 emulation in the device manager
> >
> >
> > this may help with irq conflicts on ,se6s,sl6,bp6s and be6s
> >
> >
> > by intels design you only have 4 irqs to share among the agp/usb/pci
slots
> > by intels design pci cards are supposed to share irqs-not all do so
> >
> > <SE6/SL6 IRQ resources>
> > AGP, build-in VGA, PCI-1 and PCI-5 share an IRQ
> > PCI-2, PCI-6 and AC97 share an IRQ
> > PCI-3 has an IRQ
> > PCI-4 and USB controllers share an IRQ
> >
> > Manually assign IRQ is possible in BIOS "PnP/PCI configuration"
> > page,
> > PIRQ_0 is for AGP, build-in VGA, PCI-1 and PCI-5
> > PIRQ_1 is for PCI-2, PCI-6 AND AC97
> > PIRQ_2 is for PCI-3
> > PIRQ_3 is for PCI-4 and USB controllers
> >
> > bp6/be6
> >
> > pci slot 1 shares an irq with the agp port
> > pci slot2 has its own irq
> > pci slot 3 shares with the udma66 controller-no matter what
> > pci 4 shares with slot 5 and the usb.
> >
> >
> > The IRQ sharing for BE6-II is different from that for BE6. Please
> > see user's manual p.3-41
> >
> >
> >
> >
> > No problem asigning IRQ's  on the be6-2, if you read the manual
> > carefully slot 2 shares an irq with the udma66 controller if you enble
> > the contoller. if you have an expansion card in slot 2 that does not
> > share irq's, you will have to move that card to another slot in order
> > to enable udma66 controllers. I disabled PNP, set irq assignment to
> > manual, then assigned irq 11 to slot 1 for sblive and the agp video
> > carg to share, assigned irq 10 to slot 2 for my scsi card to share
> > with udma66 controllers, so forth. see following......
> >
> > <BH6 IRQ resources>
> > AGP and PCI-1 share an IRQ
> > PCI-2 owns independent IRQ
> > PCI-3 owns independent IRQ
> > PCI-4, PCI-5 and USB share an IRQ
> >
> > Manually assign IRQ is possible in BIOS "PnP/PCI configuration"
> > page,
> > PIRQ_0 is for AGP and PCI-1
> > PIRQ_1 is for PCI-2
> > PIRQ_2 is for PCI-3
> > PIRQ_3 is for PCI-4, PCI-5 and USB
> >
> > Please try manually assigning IRQs for PCI slots to avoid conflict
> > with ISA SCSI or any other resources.
> >
> >
> >
> >
> > I found the fix for my problem, it was the MPS setting in the BP6's
bios.
> > It was set to 1.4 and this caused my USB mouse to stop working.  Setting
> it
> > to 1.1 fixed my problem.
> >
> >
> > most nics and some cards(scsi's) dont like to share irqs.they want their
> own
> > irqs.
> >
> > try your nic or card in slot 2 or 4(if there isnt any cards in 5)
> >
> > it might take moving cards around until you get a combination that
works.
> >
> > you can disable ide ports 1 and 2 if you dont need them or a serial port
> in
> > the bios.
> >
> > most AGP video cards dont mind sharing an IRQ same goes for modems -- so
> you
> > put your modem is slot-1
> >
> > also a way to assign irqs to pci slotsfor the bp6/be6?I havent actually
> tried
> > it and dont know if other abit boards can do it:
> > This is a fairly easy procedure, thanks to the BE6's BIOS.
> >
> > At bootup, enter the bios
> > goto the PNP/PCI Configuration menu
> > on the righthand side of the screen you will see    PIRQ_# Use IRQ #:
> > here you can set the IRQ to auto or 3 - 15
> >
> > the slots are numbered as shown
> >
> > AGP
> > PIRQ_0      (first PCI Slot)
> > PIRQ_1      (second PCI Slot)
> > PIRQ_2      (thrid PCI Slot)
> > PIRQ_3      (forth PCI Slot)
> >
> > I believe the fifth PCI slot is not shown because it shares the first
ISA
> > slot
> > For more info see page 3-28 in your owner manual.
> >
> >
> >
> > I believe the IRQ assignment should work. Manually assign IRQ is
> > possible in BIOS "PnP/PCI configuration"page,
> > PIRQ_0 is for AGP and PCI-1
> > PIRQ_1 is for PCI-2
> > PIRQ_2 is for PCI-3 and ATA66 controller
> > PIRQ_3 is for PCI-4, PCI-5 and USB
> >
> > But the prerequisite is that there is enough resource to assign an
> > individual one for PCI-2. A PC only has 16 IRQ resources. If all
> > occupied, PCI-2 is forced to share one IRQ with another slot.
> >

Offline Eagler

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  • Posts: 18221
Duck, here is the IRQ sharing info
« Reply #1 on: January 06, 2001, 12:55:00 PM »
Great info whels, I'm sure it'll help more than a few..

Eagler

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