User`s manual

SBC86831 Series All-In-One Mini ITX Board User’s Manual
Hardware Description
41
3.5 Interrupt Controller
The SBC86831 Series is a 100% PC compatible control board. It
consists of 16 interrupt request lines, and four out of them can be
programmable. The mapping list of the 16 interrupt request lines is
shown as the following table.
IRQ Parity Check Error
IRQ0 System timer
IRQ1 Keyboard
IRQ2 Interrupt rerouting from IRQ8 through IRQ15
IRQ3 Communications Port (COM2)
IRQ4 Communications Port (COM1)
IRQ5 PCI Device Share
IRQ6 Floppy Disk Controller
IRQ7 Printer port #1
IRQ8 System CMOS/Real time clock
IRQ9 ACPI Controller
IRQ10 Communications Port (COM3)
IRQ11 Communications Port (COM4)
IRQ12 PS/2 Compatible Mouse
IRQ13 Numeric data processor
IRQ14 Primary IDE Channel
IRQ15 Secondary IDE Channel