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28 ASUS CUSL2-M 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:
ABCDEFGH
PCI slot 1 —————shared ——
PCI slot 2 ——————shared —
PCI slot 3 ———————shared
Onboard VGA shared ———————
Onboard USB controller HC0 ———not shared ————
Onboard USB controller HC1 ———————shared
AGP Pro shared ———————
CNR LAN ————not shared ———
CNR Audio/Modem — not shared ——————
Onboard LAN ——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) Slot
This connector supports a specially designed network, audio, or modem riser card.
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.
CUSL2-M
®
CUSL2-M Communication & Networking Riser Connectors
CNR Restrictions:
1. If an audio CNR card is used, it must be primary.
2. If the onboard audio CODEC is enabled, the modem CNR card must be
secondary.