Asus CUW-B User Manual download pdf (Page 30)

30 ASUS CUW-B User’s Manual

3. HARDWARE SETUP

Expansion Cards

3. H/W SETUP

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. To select a DMA channel, see PCI/

PNP ISA DMA Resource Exclusion in 4.4.3 PCI Configuration. NOTE: The on-

board audio by default uses DMA1.

IMPORTANT: To avoid conflicts, reserve the necessary IRQs and DMAs for

legacy ISA cards (see PCI/PNP ISA IRQ Resource Exclusion and PCI/PNP

DMA IRQ Resource Exclusion in 4.4.3 PCI Configuration). Choose Yes in

IRQ xx Used By ISA and DMA x Used By ISA for those IRQs and DMAs you

want to reserve).

3.7.4 Audio Modem Riser (AMR) Slot

This connector supports a specially designed audio and/or modem card called an AMR.

Main processing is done through software and controlled by the motherboard’s Intel I/

O Controller Hub (ICH). This provides an upgradeable audio and/or modem solution

at an incredibly low cost. There are two types of AMR, one defined as primary and

another defined as secondary. This motherboard uses the primary channel so that a

secondary AMR can coexist without the need to disable the onboard CODEC. The

motherboard’s onboard CODEC must be disabled when using a primary AMR.

NOTE: An AMR is not included with this motherboard.

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CUW-B

CUW-B Audio Modem Riser (AMR) Connector

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Asus CUW-B User Manual Page 30