Asus P3B-F - Manual (Page 31)

ASUS P3B-F User’s Manual 31
To simplify this process, this motherboard complies with the Plug and Play (PNP)
specification which was developed to allow automatic system configuration when-
ever a PNP-compliant card is added to the system. For PNP cards, IRQs are as-
signed automatically from those available.
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 as-
signs an IRQ to PCI cards that require an IRQ. To install a PCI card, you need to set
something called 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.
3.7.3 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 PCI/PNP ISA IRQ/DMA Resource Exclusion in 4.4.3 PCI Con-
figuration. Choose Yes in IRQ xx Used By ISA and DMA x Used By ISA for those IRQs
and DMAs you want to reserve).
DMA Channels 3. H/W SETUP
3.7.4 Accelerated Graphics Port (AGP)
This motherboard provides an accelerated graphics port (AGP) slot to support a new
generation of graphics cards with ultra-high memory bandwidth, such as an ASUS
3D Hardware Accelerator.
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P3B-F
P3B-F Accelerated Graphics Port (AGP)
3. HARDWARE SETUP