Problem 4 Describe the steps in the fetch/... [FREE SOLUTION]

Chapter 1: Problem 4

Describe the steps in the fetch/decode/execute cycle.

Short Answer

Expert verified

Explain the fetch/decode/execute cycle in computer architecture.

Step by step solution

Fetch the instruction

In this step, the computer's central processing unit (CPU) retrieves the instruction from memory. The CPU uses a register called the instruction pointer (IP) to store the memory address of the current instruction. The instruction is fetched from the memory location pointed to by the IP, and the IP is incremented to point to the next instruction in memory.

Decode the instruction

After fetching the instruction, the CPU must determine what operation to perform, such as an arithmetic operation, memory access, or input/output operation. The instruction is decoded by the control unit of the CPU, which translates it into a series of control signals. These signals are used to direct the appropriate parts of the CPU and system hardware to perform the specified operation.

Execute the instruction

Once the instruction has been decoded, the CPU executes the specified operation, using the specified operands (if any). The operation may involve manipulating data in the registers, accessing memory, or interacting with input/output devices. After the instruction is executed, the CPU moves on to the next instruction in the sequence, returning to the fetch step and starting the cycle again.

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91影视

Describe the steps in the fetch/decode/execute cycle.

Short Answer

Step by step solution

Fetch the instruction

Decode the instruction

Execute the instruction

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