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Chapter 2: Hardware informationChapter 2: Hardware information
Chapter 2: Hardware informationChapter 2: Hardware information
Chapter 2: Hardware information
2.5.32.5.3
2.5.32.5.3
2.5.3
Interrupt assignmentsInterrupt assignments
Interrupt assignmentsInterrupt assignments
Interrupt assignments
Standard interrupt assignmentsStandard interrupt assignments
Standard interrupt assignmentsStandard interrupt assignments
Standard interrupt assignments
IRQIRQ
IRQIRQ
IRQ
PriorityPriority
PriorityPriority
Priority
Standard FunctionStandard Function
Standard FunctionStandard Function
Standard Function
01 System Timer
12 Keyboard Controller
2– Re-direct to IRQ#9
311 -
412 Communications Port (COM1)*
513 IRQ holder for PCI steering*
614 Floppy Disk Controller
715 Printer Port (LPT1)*
83 System CMOS/Real Time Clock
94 IRQ holder for PCI steering*
10 5 IRQ holder for PCI steering*
11 6 IRQ holder for PCI steering*
12 7 PS/2 Compatible Mouse Port*
13 8 Numeric Data Processor
14 9 Primary IDE Channel
15 10 Secondary IDE Channel
* These IRQs are usually available for ISA or PCI devices.
IRQ assignments for this motherboardIRQ assignments for this motherboard
IRQ assignments for this motherboardIRQ assignments for this motherboard
IRQ assignments for this motherboard
AA
AA
A
BB
BB
B
CC
CC
C
DD
DD
D
EE
EE
E
FF
FF
F
GG
GG
G
HH
HH
H
PCI slot 1 — shared shared shared shared — — —
PCI slot 2 — — shared shared shared shared — —
PCI slot 3 — — — shared shared shared shared —
PCI E x1 slot 1 — — shared — — — — —
PCI E x1 slot 2 shared — — — — — — —
PCI E x1 slot 3 — — — shared — — — —
PCI E x16 slot shared — — — — — — —
Onboard USB controller 1 — — — — — — — shared
Onboard USB controller 2 — — — shared — — — —
Onboard USB controller 3 — — shared — — — — —
Onboard USB 2.0 controller — — — — — — — shared
Onboard LAN — — — — — shared — —
Onboard HD audio shared — — — — — — —
When using PCI cards on shared slots, ensure that the drivers support
“Share IRQ” or that the cards do not need IRQ assignments. Otherwise,
conflicts will arise between the two PCI groups, making the system
unstable and the card inoperable.