1.1 Fetch-Decode-Execute Cycle Flashcards Preview

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Flashcards in 1.1 Fetch-Decode-Execute Cycle Deck (5)
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What is the fetch decode execute cycle?

The Fetch Decode Execute Cycle is the method used by the CPU to carry out a single instruction contained in a computer program


What is the first stage of the FDE Cycle?

The program counter value is first copied into the Memory Address Register (MAR)


What is the second stage of the FDE Cycle?

The MAR fetches the instruction and copies it into the MDR


Via which bus is an instruction passed from main memory into the MDR?

The data bus passes an instruction from main memory into the MDR


What are the five registers in tbe CPU involved in the FDE Cycle?

The Memory Data Register (MDR)

The Memory Address Register (MAR)

The Program Counter (PC)

The Accumulator

The Instruction Register