Irq assignments: optiplex gx i – Dell OptiPlex Gxi User Manual
Page 38
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IRQ Assignments: OptiPlex GXi
1
IRQ3 is available provided that no other device in the computer (such as a modem) is using COM2 or COM4.
2
If an ISA expansion card is configured for IRQ11, the NIC or PCI IRQ is assigned to another available IRQ line.
IRQ Line
System Resource
IRQ Line
System Resource
IRQ0
System timer
IRQ8
RTC
IRQ1
Keyboard port
IRQ9
Video controller
IRQ2
Enables IRQ8 through IRQ15
IRQ10
Available
IRQ3
Available
1
IRQ11
NIC/default PCI IRQ
2
IRQ4
Serial port
IRQ12
Mouse port
IRQ5
Audio Controller
IRQ13
Math coprocessor
IRQ6
Diskette/tape drive controller
IRQ14
Primary EIDE channel
IRQ7
Parallel port
IRQ15
Secondary EIDE channel
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