Dell PowerEdge 500SC - Manual (Page 22)

Back to Contents Page
Table 3-1. IRQ Line Assignment Defaults
IRQ Line Used By/Available
IRQ0 Used by the system timer
IRQ1 Used by the keyboard controller
IRQ2 Used by interrupt controller 1 to enable IRQ8 through IRQ15
IRQ3 Available
IRQ4 Used by serial port 1 (COM1 – COM4)
IRQ5 Available unless used by USB ports
IRQ6 Used by the diskette drive controller
IRQ7 Used by the primary parallel port
IRQ8 Used by the real-time clock
IRQ9 Reserved for ACPI functions
IRQ10 Available
IRQ11 Available
IRQ12 Used by the PS/2 mouse port if the mouse is enabled in the System Setup program
IRQ13 Used by the math coprocessor
IRQ14 Primary IDE controller (IDE 1)
IRQ15 Secondary IDE controller (IDE 2)
NOTE: For the full name of an abbreviation or acronym used in this table, see "Abbreviations and Acronyms."