User's Guide

2. Interrupt Lines
Express5800/R120d-1M User’s Guide
128
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 VGA, LAN1
5 PCI 17 LAN2, SATA
6
−
18
−
7 PCI 19
−
8 Real-time clock 20 USB
9 Microsoft ACPI-Compliant System 21 USB
10 PCI 22 USB
11 Motherboard resource 23 USB