The X 86 Microprocessors: Architecture, Programming and Interfacing (8086 to Pentium) 2nd Edition by Pearson

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x86 MICROPROCESSORS

and takes up the new task by going to a new location in memory. This new memory loca-

tion is called the ‘interrupt vector’ corresponding to the specific interrupt. What is there

at the interrupt vector? It is at this address that the Interrupt Service Routine (ISR) is

stored. The ISR is the program that the interrupting device wants to get executed. Thus,

for each interrupting device, there should be an ISR at an ‘interrupt vector’.

Interrupt Pins of the 8085 This processor has five hardware interrupt pins on which

peripherals can place their interrupt requests. The first one is the INTR (Interrupt) pin.

A peripheral ...