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Definition of "fetch cycle" |
The time period during which one instruction is fetched from memory and executed when a computer is given an instruction in machine language. There are typically four stages of an instruction cycle that the CPU carries out: Fetch the instruction from memory. This step brings the instruction into the instruction register, a circuit that holds the instruction so that it can be decoded and executed. Decode the instruction.Read the effective address from memory if the instruction has an indirect address. Execute the instruction. / the period of time during which an instruction is retrieved from memory and sent to the CPU. This is the part of the fetch–decode–execute cycle for all machine instruction. |
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