What is Instruction Set Architecture ? :ISA in Computer Architecture : Computer Organization

This lecture will provide you the concept of Instruction Set Architecture in Computer Architecture . You will learn about an Instruction Set Architecture , How it supports to hardware and Software for the communication.

Definition : In computer science, an instruction is an operation of a processor .
Direction given to a computer.

The size or length of an instruction varies, from 4-bits to many bytes.

Instruction :
Direction given to a computer
Electrical signals to be sent through specific circuits for processing in processor.

Definition : It is an interface between hardware and software.
It is the part of computer architecture which is related to programming, instruction , registers, addressing modes….etc
Instruction Set : It is a combination of Instructions, that a processor executes.
Types of Instructions :
Arithmetic Instruction: Add, Subtract, Multiplication..etc
Logic Instruction : AND, OR, NOT…etc.
Data Instruction : Move, Input , Load, Store , output.
Control Flow Instruction : Go to, if… go to , call , return.

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