B.4 interrupt request (irq) lines, Interrupt request (irq) lines, Table b-4: irq lines apic mode – ADLINK AmITX-IB-I User Manual
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System Resources
B.4 Interrupt Request (IRQ) Lines
Table B-4: IRQ Lines APIC Mode
IRQ#
Typical Interrupt Resource
Connected to Pin
0
System Timer
N/A
1
Keyboard controller
N/A
2
N/A
N/A
3
Serial Port 2 (COM2) / PCI /
ISA
IRQ3 via SERIRQ, IRQ3 at
ISA bus
4
Serial Port 1 (COM1) / PCI /
ISA
IRQ4 via SERIRQ, IRQ4 at
ISA bus
5
Serial Port 3, 4 (COM3,4) / PCI
/ ISA
IRQ5 via SERIRQ, IRQ5 at
ISA bus
6
N/A
N/A
7
N/A
N/A
8
Real-time clock
N/A
9
N/A
N/A
10
Serial Port 5 (COM5,6) / PCI /
ISA
IRQ10 via SERIRQ, IRQ10 at
ISA bus
11
N/A
N/A
12
N/A
N/A
13
Math Processor
N/A
14
N/A
N/A
15
N/A
N/A
16
PCI-to-PCI bridge, PCI-to-USB
Host Controller
N/A
17
PCI-to-PCI bridge
N/A
18
N/A
N/A
19
N/A
N/A
20
N/A
N/A
21
N/A
N/A
22
High Definition Audio Contoller
N/A
23
AHCI SATA Contoller
N/A
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