Question

)How is IVT used in the 8086 microprocessor for Input/Output? Write a program using 8086 assembly language to input a string: “8086 Microprocessor was a 16-bit processor.”

13 Sep 2024
Answer :
Word Count : 984

### Interrupt Vector Table (IVT) and I/O Operations in the 8086 Microprocessor

#### Overview of IVT in the 8086 Microprocessor

The 8086 microprocessor, developed by Intel, is a 16-bit processor that introduced several important features and concepts in the realm of computer architecture. One key component of the 8086 architecture is the Interrupt Vector Table (IVT), which plays a crucial role in handling interrupt requests and facilitating Input/Output (I/O) operations.

The Interrupt Vector Table (IVT) is a data structure used to manage interrupt requests in the 8086 microprocessor. It is located at the beginning of the memory address space, starting at address `0000h` and extending to `03FFh`. This table consists of 256 interrupt vectors, each occupying 4 bytes. Each interrupt vector provides the segment and offset address of the interrupt service routine (ISR) that will handle the corresponding interrupt.

When an interrupt request (IRQ) is generated, the processor uses the IVT to locate the appropriate ISR. The IVT thus serves as a reference table for the processor to determine the address of the ISR to execute in response to an interrupt. This mechanism is fundamental for managing various types of interrupts, including hardware interrupts (e.g., from __________ _________ __________ ____ ____ __________.
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