Question
What is an Interrupt Vector Table (IVT) in the 8086 microprocessor? Explain its use with the help of a diagram. Write a program using 8086 assembly language to input the string: "Welcome to the Program."
Answer :
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The Interrupt Vector Table (IVT) in the 8086 microprocessor is a predefined array that stores the addresses of interrupt service routines (ISRs). The IVT allows the processor to handle interrupts by mapping each interrupt type to a specific address in memory where the corresponding ISR is located. The 8086 microprocessor has 256 interrupt vectors, each of which points to a specific location in memory where the interrupt service routine is stored. The IVT is located at the starting address of memory, at segment 0x0000, and it consists of 256 entries, each of 4 bytes (2 bytes for the segment address and 2 bytes for the offset address). When an interrupt occurs, the processor uses the interrupt number to
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