2. Interrupt LinesExpress5800/GT110e-S User’s Guide 139Chapter 4 Appendix2. Interrupt LinesInterrupt lines are assigned as factory settings as shown below. Use this table as a reference when you addoptional devices.• Interrupt linesAs factory settings, interrupt lines are assigned as follows.IRQ Peripheral Device (Controller) IRQ Peripheral Device (Controller)0 System timer 8 Real-time clock1 − 9 Microsoft ACPI-Compliant System2 Cascade connection 10 PCI3 COM 2 serial port 11 PCI4 COM 1 serial port 12 −5 PCI 13 Arithmetic operation processor6 − 14 Primary IDE7 − 15 Secondary IDE