IBASE IB965 - Manual (Page 76)

APPENDIX
72 IB965 User’s Manual
B. Interrupt Request Lines (IRQ)
Peripheral devices use interrupt request lines to notify CPU for the service
required. The following table shows the IRQ used by the devices on
board.
Level Function
IRQ0 System Timer Output
IRQ1 PS/2 Keyboard
IRQ3 Serial Port #2
IRQ4 Serial Port #1
IRQ7 Serial Port #3
IRQ8 Real Time Clock
IRQ11 Serial Port #4
IRQ12 PS/2 Mouse
IRQ18 82583V Gigabit Network
IRQ20 82579V Gigabit Network