In computer science , the vector is interrupted by the process of processing the device to the appropriate interrupt service routine . This is in contrast to a polled interrupt system, in which a single interrupt service routine has been established.
Vectored interrupts are achieved by assigning each interrupting device to a unique code, typically four to eight bits in length.  When a device interrupts, it sends its unique code to the data bus to the processor, telling the processor which interrupt service routine to execute.
- Jump up^ Hamacher, Carl (2002). “INPUT / OUTPUT Organization”. Computer Organization (5th ed.). McGraw Hill. p. 214. ISBN 0072320869 .