2. IRQ and I/O Port AddressExpress5800/53Xi, Y53Xi User's Guide82Chapter 4 Appendix2. IRQ and I/O Port AddressThe factory-set interrupt requests and I/O port addresses are listed below. Find an appropriate one to install anoptional device.• Interrupt RequestThe IRQs are assigned at factory as follows:IRQ Peripheral Device (Controller) IRQ Peripheral Device (Controller)0 System timer 8 Real-time clock1 – 9 SCI2 Cascade connection 10 –3 – 11 –4 COM1 serial port 12 –5 – 13 Numeric processor6 – 14 –7 – 15 –• PIRQ and PCI DeviceThe factory-set PCI device interrupts are assigned as follows. You cannot change setting.Menu item InterruptPCI IRQ 16 PCI1, PCI2, USB2, Display Adapter, MEI, USB3.0PCI IRQ 17PCI IRQ 18 LAN2PCI IRQ 19 SATA1, SATA2, SOLPCI IRQ 20 LAN1PCI IRQ 21 –PCI IRQ 22 AudioPCI IRQ 23 USB1
