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interrupt vector table
Last modified: Tuesday, October 29, 2002 

A table of interrupt vectors (pointers to routines that handle interrupts). On PCs, the interrupt vector table consists of 256 4-byte pointers, and resides in the first 1 K of addressable memory. Each interrupt number is reserved for a specific purpose. For example, 16 of the vectors are reserved for the 16 IRQ lines.

An interrupt vector table is also called a dispatch table.

Also see the list of IRQ numbers in the Quick Reference section of Webopedia.

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