Interrupt Priority
IRQ00
IRQ01
IRQ02
IRQ03
IRQ04
IRQ05
IRQ06
IRQ07
IRQ08
IRQ09
IRQ10
IRQ11
IRQ12
IRQ13
IRQ14
IRQ15
Parallel Port Interrupts
The parallel port I/O interrupts are given in the following table.
Port
LPT1
LPT2
LPT3
Interrupt Level Assignments
Interrupt Device
System Timer
Keyboard
Programmable Interrupt Controller
User Available
Communications Port
IRQ Holder for PCI Steering/Digital Audio/SMBus
Controller/USB Universal Host Controller/CardBus
Controller
Diskette Drive Controller
Parallel Port 1
Real-Time clock
User Available
IRQ Holder for PCI Steering/Network board/CardBus
Controller/Graphics Driver
User Available
Mouse
Numeric Data Processor
Primary IDE Controller/Bus Master IDE Controller
Secondary IDE Controller/Bus Master IDE Controller
Parallel Port Interrupts
Interrupt
IRQ07
IRQ07
IRQ07
System Configuration 2-3