User's Guide

2. Interrupt Lines
Express5800/R120f-2M User’s Guide
146
Chapter 4 Appendix
2.
Interrupt Lines
Interrupt lines are assigned as factory settings as shown below. Use this table as a reference when you add
optional devices.
• Interrupt lines
As factory settings, interrupt lines are assigned as follows.
IRQ Peripheral Device (Controller) IRQ Peripheral Device (Controller)
0 System timer 12 SM Bus
1
−
13 Numeric data processor
2
−
14
−
3 COM 2 serial port 15
−
4 COM 1 serial port 16 SATA
5 PCI 17
6
−
18 USB
7 PCI 19 USB
8 Real-time clock 20
9 Microsoft ACPI-Compliant System 21
10 PCI 22
11 Motherboard resource 23