Dell POWEREDGE 1855 User Manual
Page 31

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IRQ Line Assignment
IRQ0
System timer
IRQ1
Keyboard controller
IRQ2
Interrupt controller 1 to enable IRQ8 through IRQ15
IRQ3
Available
IRQ4
Reserved for Console Redirection
IRQ5
Remote access controller
IRQ6
Available
IRQ7
Available
IRQ8
Real-time clock
IRQ9
ACPI functions (used for power management)
IRQ10
Available
IRQ11
Available
IRQ12
PS/2 mouse port unless the mouse is disabled through the System Setup program
IRQ13
Math coprocessor
IRQ14
Available
IRQ15
Available
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