Assigning Dma Channels For Isa Cards - Asus TX97-X User Manual

To simplify this process this motherboard has complied 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 PC1 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 does not work with the BIOS,
you can contact your vendor for an ISA Configuration Utility.
An IRQ number is automatically assigned to PC1 expansion cards after those used
by Legacy and PNP ISA cards. In the PC1 bus design, the BIOS automatically
assigns an IRQ to a PC1 slot that has a card in it that requires an IRQ. To install a
the PC1 slots on this motherboard use an INTA #, be sure that the jumpers on your

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 above. You can select a DMA channel in
the PC1 and PNP configuration section of the BIOS Setup utility.
IMPORTANT: Choose "Yes" for those IRQ's and DMA's you wish to reserve
for Legacy (Non-PnP) ISA expansion cards in "IRQ xx Used By ISA" and "DMA
x Used By ISA" of the PNP and PC1 Setup in the BIOS SOFTWARE section,
otherwise conflicts may occur.
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