Dell PowerEdge 2450 User Manual download pdf (Page 35)

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IRQ0 Used by the system timer

IRQ1 Used by the keyboard to signal that the output buffer is full

IRQ2 Used by interrupt controller 2

IRQ3 Used by serial port 2 (COM2 and COM4) or PCI device

IRQ4 Used by serial port 1 (COM1 and COM3) or PCI device

IRQ5 Available unless used by a secondary parallel port

IRQ6 Used by the diskette drive controller

IRQ7 Used by the primary parallel port or PCI device

IRQ8 Used by the RTC

IRQ9 Used by ACPI

IRQ10 Available

IRQ11 Available

IRQ12 Used by the PS/2 mouse port, unless mouse is disabled in Sys-

tem Setup program

IRQ13 Reserved for floating-point errors

IRQ14 Available

IRQ15 Used by ESM

NOTE: For the full name of an abbreviation or acronym used in this table, see "Abbreviations and

Acronyms."

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Dell PowerEdge 2450 User Manual Page 35