Which one of the following is not a general operation of machine cycle in a central processing unit ?

Machine Cycle:

• A machine cycle consists of the steps that a computer’s processor executes whenever it receives a machine language instruction.
• It is the most basic CPU operation, and modern CPUs are able to perform millions of machine cycles per second.
• The cycle consists of three standard steps: fetch, decode and execute along with the store is also incorporated into the cycle.
   

Fetch: The control unit requests instructions from the main memory that is stored at a memory’s location as indicated by the program counter (also known as the instruction counter).

Decode:

• Received instructions are decoded in the instruction register.
• This involves breaking the operand field into its components based on the instruction’s operation code (opcode).
   

Execute:

• This involves the instruction’s opcode as it specifies the CPU operation required.
• The program counter indicates the instruction sequence for the computer.
• These instructions are arranged into the instructions register and as each is executed, it increments the program counter so that the next instruction is stored in memory.
• Appropriate circuitry is then activated to perform the requested task.
• As soon as instructions have been executed, it restarts the machine cycle that begins the fetch step.