User Guide

IRQ and Expansion-Card Slot Assignments: Dell Dimension Vxxx and Vxxxc Systems

IRQ and Expansion-Card Slot Assignments: Dell^™ Dimension^™ Vxxx and Vxxxc Systems

IRQ Line	System Resource	IRQ Line	System Resource
IRQ0	System timer	IRQ8	RTC
IRQ1	Keyboard buffer	IRQ9	Default IRQ for on-board NIC or on-board audio controller. Otherwise, default IRQ for Dell-installed DVD card in PCI slot 2.
IRQ2	Enables IRQ8 through IRQ15	IRQ10	Default IRQ for Dell-installed network or sound card in PCI slot 1.
IRQ3	Available^*	IRQ11	Default IRQ for on-board video controller.
IRQ4	Serial port	IRQ12	Mouse port
IRQ5	Available	IRQ13	Math coprocessor
IRQ6	Diskette/tape drive controller	IRQ14	Primary EIDE channel
IRQ7	Parallel port	IRQ15	Secondary EIDE channel

^*	IRQ3 is available provided that no other device in the computer (such as a modem) is using COM2 or COM4.