2.5.2 Interrupt assignments
Standard interrupt assignments
IRQ Priority Standard function
0 1 System Timer
1 2 Keyboard Controller
2 – Redirect to IRQ#9
4 12 Reserved
5 13 Reserved
6 14 Floppy Disk Controller
7 15 Reserved
8 3 System CMOS/Real Time Clock
9 4 Reserved
10 5 Reserved
11 6 Reserved
12 7 Reserved
13 8 Numeric Data Processor
14 9 Reserved
ICH
A B C D E F G H
LAN1 (8111C) – shared – – – – – –
LAN2 (8111C) – – shared – – – – –
Marvell 6121 – – – shared – – – –
Marvell SAS shared – – – – – – –
USB controller 1 – – – – – – – shared
USB controller 2 – – – shared – – – –
USB controller 3 – – shared – – – – –
USB controller 4 shared – – – – – – –
USB controller 5 – – – – – shared – –
USB controller 6 – – – shared – – – –
USB 2.0 controller 1 – – – – – – – shared
USB 2.0 controller 2 – – shared – – – – –
SATA controller 1 – – – – shared – – –
SATA controller 2 – – – – shared – – –
1394 – shared – – – – – –
Audio Azalia – – – – – – shared –
IRQ assignments for this motherboard
2-18 Chapter 2: Hardware information
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