Top SERIES Movies... H Achieve3000: HomeQuestion 49ClassesWhich of the following is not true about the machine cycle?Question 50Canvas for StudentsMicrosoft OfficeO Storing means writing the result to a storage medium (not to memory).O Fetching is the process of obtaining a program, instruction, or data from memory.O Decoding refers to the process of translating instruction into signals the computer can execute.O Executing is the process of carrying out the commands.

The machine cycle, also known as the instruction cycle or fetch-execute cycle, is the basic…

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Computer Networking: A Top-Down Approach (7th Edition)

7th Edition

ISBN:9780133594140

Author:James Kurose, Keith Ross

Publisher:James Kurose, Keith Ross

Chapter1: Computer Networks And The Internet

Section: Chapter Questions

Problem R1RQ: What is the difference between a host and an end system? List several different types of end...

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Step 1: Introduction

The machine cycle, also known as the instruction cycle or fetch-execute cycle, is the basic operational cycle of a computer's central processing unit (CPU). It represents the series of steps that the CPU goes through to fetch, decode, and execute instructions.
The machine cycle typically consists of the following four stages:
- Fetch: In this stage, the CPU fetches the next instruction from the memory. The program counter (PC) holds the address of the next instruction to be fetched. The CPU sends a request to the memory controller to retrieve the instruction from the corresponding memory address.
- Decode: Once the instruction is fetched, the CPU decodes it. In this stage, the CPU determines the meaning of the instruction and identifies the operation or operations it needs to perform. The instruction may specify operations such as arithmetic calculations, data manipulation, or branching to another part of the program.
- Execute: After the instruction is decoded, the CPU executes it. This stage involves carrying out the specific operations or calculations specified by the instruction. The CPU may perform tasks such as reading or writing data to memory, performing mathematical operations, or transferring data between registers.
- Store: In the final stage of the machine cycle, the CPU stores the result of the executed instruction. If the instruction produced a result that needs to be stored in memory or a register, the CPU writes the result back to the appropriate location. This allows the result to be accessed and used by subsequent instructions or stored for future use.
Once the store stage is complete, the machine cycle starts again with the fetch stage, retrieving the next instruction in sequence. This cycle continues, fetching, decoding, executing, and storing instructions one after another, until the program is completed or an explicit termination condition is encountered.
The machine cycle is the fundamental process that allows a computer to execute instructions and perform computations. By repeating this cycle for each instruction in a program, the CPU can carry out complex operations and execute programs of varying complexity.