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2.5.3
2.5.3
2.5.3
2.5.3
2.5.3
Interrupt assignments
Interrupt assignments
Interrupt assignments
Interrupt assignments
Interrupt assignments
S t a n d a r d i n t e r r u p t a s s i g n m e n t s
S t a n d a r d i n t e r r u p t a s s i g n m e n t s
S t a n d a r d i n t e r r u p t a s s i g n m e n t s
S t a n d a r d i n t e r r u p t a s s i g n m e n t s
S t a n d a r d i n t e r r u p t a s s i g n m e n t s
IRQ
0
1
2
3*
4*
5*
6
7*
8
9*
10*
11*
12*
13
14
15
* These IRQs are usually available forISA or PCI devices.
PCI Bus Number, IDSEL, and IRQ assignments
Description
PCI slot 1
PCI slot 2
PCIE x 16 slot
PCIE x 8 slot
Onboard USB controller 0
Onboard USB controller 1
Onboard USB controller 2
Onboard USB controller 3
USB 2.0 EHCI controller
Onboard IDE port
Onboard SATA port
ATI RAGE XL
SMBUS Controller
Onboard LAN
When using PCI cards on shared slots, ensure that the drivers support
"Shared IRQ" or that the cards do not need IRQ assignments. Otherwise,
conflicts will arise between the two PCI groups, making the system
unstableand the card inoperable.
A S U S T S 1 0 0 - E 3
A S U S T S 1 0 0 - E 3
A S U S T S 1 0 0 - E 3
A S U S T S 1 0 0 - E 3
A S U S T S 1 0 0 - E 3
Priority
1
2
-
11
12
13
14
15
3
4
5
6
7
8
9
10
INTA
INTB
PIRQE# PIRQF# PIRQG# PIRQH# REQ0# GNT0#
PIRQG# PIRQH# PIRQE# PIRQF# REQ1# GNT1#
PIRQA# PIRQB# PIRQC# PIRQD#
PIRQA# PIRQB# PIRQC# PIRQD#
PIRQA#
PIRQB#
PIRQA#
PIRQC#
PIRQD#
PIRQE#
PIRQD#
PIRQB#
Standard Function
System Timer
Keyboard Controller
Re-direct to IRQ #9
Communications Port (COM2)
Communications Port (COM1)
IRQ holder for PCI steering
Floppy Disk Controller
Printer Port (LPT1)
System CMOS/REAL Time Clock
IRQ holder for PCI steering
IRQ holder for PCI steering
IRQ holder for PCI steering
PS/2 Compatiable Mouse Port
Numeric Data Processor
Primary IDE Channel
Secondary IDE Channel
INTC
INTD
REQ#
PIRQC#
PIRQD#
REQ2# GNT2#
GNT#
2 - 1 3
2 - 1 3
2 - 1 3
2 - 1 3
2 - 1 3
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