HP Kayak XU Technical Reference Manual page 65

Interrupt Controllers
The system has an APIC (82093AA) I/O interrupt controller and two 82C59
"legacy" interrupt controllers.
The following table shows how the "legacy" interrupts are connected to the
APIC controller. The Interrupt Requests (IRQ) are numbered sequentially,
starting with the master controller, and followed by the slave (both of 82C59
type).
I/O APIC
IRQ
Input
INTIN0 INTR
INTIN1 IRQ1
INTIN2 IRQ0
INTIN3 IRQ3
INTIN4 IRQ4
INTIN5 IRQ5
INTIN6 IRQ6
INTIN7 IRQ7
INTIN8 IRQ8
INTIN9 IRQ9
INTIN10 IRQ10
INTIN11 IRQ11
INTIN12 IRQ12
INTIN13 not connected
INTIN14 IRQ14
INTIN15 IRQ15
INTIN16 PCINTA
INTIN17 PCINTB
INTIN18 PCINTC
INTIN19 PCINTD
INTIN20 TFPC IRQ
INTIN21 SCI IRQ
INTIN22 not connected
INTIN23 PIIX4 SM
Interrupt Request Description
NS317 Keyboard Controller
PIIX4 System Timer
NS317 COM2, COM4
NS317 COM1, COM3
AD1816, LPT2
NS317 Flexible Disk Controller
NS317 LPT1
NS317 RTC
AD1816 MIDI
NS317 Mouse
PIIX4 IDE
4 HP BIOS
BIOS Addresses
57