IBASE SI-83 - Manual (Page 72)

64 SI-83 User 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
IRQ4 Serial Port #1
IRQ8 System CMOS / real time clock
IRQ11 Intel(R) 8 Series/C220 Series SMBus Controller
-8C22
IRQ13 Numeric data processor
IRQ16 Intel(R) 8 Series/C220 Series USB EHCI#2 -8C2D
IRQ19 Intel(R) 8 Series 4 port Serial ATA Storage Controller
-8C01
IRQ22 High Definition Audio Controller
IRQ23 Intel(R) 8 Series/C220 Series USB EHCI#1-8C26