Asus X900-PIB P3C-E User Manual - Page 36

Accelerated Graphics Port AGP

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3. HARDWARE SETUP If the system has both legacy and PNP ISA cards installed, IRQs are assigned to PNP cards from those not used by legacy cards. The PCI and PNP configuration of the BIOS setup utility can be used to indicate which IRQs are being used by legacy cards. For older legacy cards that do not work with the BIOS, you can contact your vendor for an ISA Configuration Utility. An IRQ number is automatically assigned to PCI expansion cards after those used by legacy and PNP ISA cards. In the PCI bus design, the BIOS automatically assigns an IRQ to PCI cards that require an IRQ. To install a PCI card, you need to set the INT (interrupt) assignment. Since all the PCI slots on this motherboard use an INTA #, be sure that the jumpers on your PCI cards are set to INT A. Assigning DMA Channels for ISA Cards Some ISA cards, both legacy and PNP, may also need to use a DMA (Direct Memory Access) channel. DMA assignments for this motherboard are handled the same way as the IRQ assignment process described earlier. You can select a DMA channel in the PCI and PNP configuration section of the BIOS Setup utility. IMPORTANT: To avoid conflicts, reserve the necessary IRQs and DMAs for legacy ISA cards (see PNP and PCI Setup under IV. BIOS SETUP. Choose Yes in IRQ xx Used By ISA and DMA x Used By ISA for those IRQs and DMAs you want to reserve). 3.7.3 Accelerated Graphics Port (AGP) This motherboard provides an accelerated graphics port (AGP) pro slot to support a new generation of AGP graphics cards with ultra-high memory bandwidth. 3. H/W SETUP Connectors PARALLEL PORT OPTIONAL 1 2 3 4 P3C-E Rib (inside slot) 20-pin bay P3C-E Accelerated Graphics Port (AGP Pro) Slot Rib TOP VIEW 28-pin bay WARNING! If you are using an old AGP 2X card (which does not have a retention notch), make sure that the card's connector pins are seated between the 20-pin and 28-pin bays of the AGP Pro slot. Otherwise, the card and the slot may be damaged or burnt. 36 ASUS P3C-E User's Manual

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36
ASUS P3C-E User’s Manual
Connectors
3. H/W SETUP
3. HARDWARE SETUP
3.7.3
Accelerated Graphics Port (AGP)
This motherboard provides an accelerated graphics port (AGP) pro slot to support a
new generation of AGP graphics cards with ultra-high memory bandwidth.
P3C-E Accelerated Graphics Port (AGP Pro) Slot
P3C-E
PARALLEL PORT
4
3
2
1
TOP VIEW
Rib (inside slot)
Rib
20-pin bay
28-pin bay
If the system has both legacy and PNP ISA cards installed, IRQs are
assigned to PNP cards from those not used by legacy cards. The PCI and PNP con-
figuration of the BIOS setup utility can be used to indicate which IRQs are being
used by legacy cards. For older legacy cards that do not work with the BIOS, you
can contact your vendor for an ISA Configuration Utility.
An IRQ number is automatically assigned to PCI expansion cards after those used
by legacy and PNP ISA cards. In the PCI bus design, the BIOS automatically as-
signs an IRQ to PCI cards that require an IRQ. To install a PCI card, you need to set
the INT (interrupt) assignment. Since all the PCI slots on this motherboard use an
INTA #, be sure that the jumpers on your PCI cards are set to INT A.
Assigning DMA Channels for ISA Cards
Some ISA cards, both legacy and PNP, may also need to use a DMA (Direct Memory
Access) channel. DMA assignments for this motherboard are handled the same way
as the IRQ assignment process described earlier. You can select a DMA channel in
the PCI and PNP configuration section of the BIOS Setup utility.
IMPORTANT:
To avoid conflicts, reserve the necessary IRQs and DMAs for legacy
ISA cards (see
PNP and PCI Setup
under IV. BIOS SETUP. Choose
Yes
in
IRQ xx Used
By ISA
and
DMA x Used By ISA
for those IRQs and DMAs you want to reserve).
WARNING!
If you are using an old AGP 2X card (which does not have a retention
notch), make sure that the card’s connector pins are seated between the 20-pin and
28-pin bays of the AGP Pro slot. Otherwise, the card and the slot may be damaged or
burnt.