User`s guide

User Guide
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Interrupt Requests
The factory-set interrupt requests (IRQs) are listed below. Find an appropriate one to
install an optional device.
Caution
When using PCI cards on shared slots, ensure that the drivers
support “Share IRQ” or that the cards do not need IRQ assign-
ments.
Otherwise, conflicts will arise between the two PCI groups,
making the system unstable and the card inoperable.
Table 7: Interrupt Requests
ISA
Interrupt
Standard Function
INTR Processor interrupt
NMI NMI to processor
IRQ0 System timer
IRQ1 Keyboard interrupt
IRQ2 Slave PIC
IRQ3 Serial Port 1 interrupt from Super I/O device, user-configurable
IRQ4 Serial Port 1 interrupt from Super I/O device, user-configurable
IRQ5
IRQ6 Floppy disk
IRQ7 Generic
IRQ8_L Active low RTC interrupt
IRQ9 SCSI
IRQ10 Generic
IRQ11 Generic
IRQ12 Mouse interrupt
IRQ13 Floaty processor
IRQ14 Compatibility IDE interrupt from primary channel IDE devices 0 and 1
IRQ15 Secondary IDE cable
SMI System Management Interrupt. General purpose indicator sourced by the
Intel(R) ICH7R to the processor