Dell PowerEdge 4300 Dell PowerEdge 4300 Systems Installation and Troubleshooti - Page 53

Problems can arise if two devices attempt to use the same interrupt request (IRQ) line. To avoid this type of conflict, check the documentation for the IRQ line's default for each installed expansion card. Then consult Table 4-1 to configure the card for one of the available IRQ lines. IRQ0 Used by the system timer IRQ1 Used by the keyboard to signal that the output buffer is full IRQ2 Used by interrupt controller 1 to enable IRQ8 through IRQ15 IRQ3 Used by serial port 2 (COM2 and COM4) IRQ4 Used by serial port 1 (COM1 and COM3) IRQ5 Available unless used by a secondary parallel port IRQ6 Used by the diskette drive controller IRQ7 Used by the primary parallel port IRQ8 Used by the RTC IRQ9 Used for power management functions IRQ10 Available IRQ11 Available IRQ12 Used by the PS/2 mouse port unless mouse is disabled in System Setup program IRQ13 Used by the math coprocessor IRQ14 Available IRQ15 Used by embedded server management functions NOTE: For the full name of an abbreviation or acronym used in this table, see the abbreviations and acronyms list that precedes the Index. Finding Software Solutions 4-3