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.
