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Hardware setup, 3 communication and networking riser (cnr) slots, Interrupt request table for this motherboard – Asus 820E User Manual

Page 28: 28 asus cuc2 user’s manual, Expansion cards 3. h/w setup

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ASUS CUC2 User’s Manual

3. HARDWARE SETUP

Expansion Cards

3. H/W SETUP

Interrupt Request Table for this Motherboard

Interrupt requests are shared as shown by the following table:

A

B

C

D

E

F

G

H

PCI slot 1

shared

PCI slot 2

not shared

PCI slot 3

shared

PCI slot 4

shared

PCI slot 5

shared

PCI slot 6

not shared

Onboard USB controller HC0

— not shared —

Onboard USB controller HC1

shared

AGP Pro

not shared —

CNR LAN

shared

CNR Audio/Modem

— not shared —

IMPORTANT:

If using PCI cards on shared slots, make sure that the drivers sup-

port “Share IRQ” or that the cards do not need IRQ assignments. Conflicts will arise
between the two PCI groups that will make the system unstable or cards inoperable.

3.7.3 Communication and Networking Riser (CNR) Slots

These connectors support specially designed network, audio, or modem riser cards.
Main processing is done through software and controlled by the motherboard’s sys-
tem chipset. This provides upgradeable network, audio, and/or modem solutions at
an incredibly low cost.

NOTE: CNRs are not included with this motherboard.

CUC2 Communication & Networking Riser Connectors

CUC2

®

CNR Restrictions:
1. Only one audio CNR can be used, and it must be primary and inserted into

CNR slot 1.

2. If both an audio CNR and modem CNR are used, the modem CNR must be

secondary.

3. The modem CNR must be primary if no audio CNR is used.
4. Only one network CNR can be supported.
5. When a USB hub CNR card is used, USB ports 5 and 6 will not function.

This manual is related to the following products: