ASUS SABERTOOTH X58
2-19
Chapter 2
2.5.3
Interrupt assignments
Standard interrupt assignments
* These IRQs are usually available for PCI devices.
IRQ
Priority Standard function
0
1
System Timer
1
2
Keyboard Controller
2
–
Redirect to IRQ#9
4
12
Communications Port (COM1)*
5
13
IRQ Holder for PCI Steering*
6
14
Reserved
7
15
Reserved
8
3
System CMOS/Real Time Clock
9
4
IRQ Holder for PCI Steering*
10
5
IRQ Holder for PCI Steering*
11
6
IRQ Holder for PCI Steering*
12
7
Reserved
13
8
Numeric Data Processor
14
9
Primary IDE Channel
ICH
A
B
C
D
E
F
G
H
PCIE16_3
shared
–
–
–
–
–
–
–
PCIE1_1
–
shared
–
–
–
–
–
–
PCIE1_2
–
–
–
shared
–
–
–
–
LAN1
–
–
–
shared
–
–
–
–
PCI_1
shared
–
–
–
–
–
–
–
USB_1
–
–
–
–
–
–
–
shared
USB_2
–
–
–
shared
–
–
–
–
USB_3
–
–
shared
–
–
–
–
–
USB_4
shared
–
–
–
–
–
–
–
USB_5
–
–
–
–
–
shared
–
–
USB_6
shared
–
–
–
–
–
–
–
USB 2.0_1
–
–
–
–
–
–
–
shared
USB 2.0_2
–
–
shared
–
–
–
–
–
SATA_1
–
–
shared
–
–
–
–
–
SATA _2
–
–
–
–
shared
–
–
–
Audio
–
–
–
–
–
–
shared
–
IRQ assignments for this motherboard
IOH
24
25
26
27
28
29
30
31
NEC USB 3.0
–
–
–
–
–
shared
–
–
Marvell 9128
–
–
–
–
shared
–
–
–
PCIE16_1
shared
–
–
–
–
–
–
–
PCIE16_2
–
–
–
–
–
–
shared
–