COMPUTER SCIENCE AND ENGINEERING
COMPUTER ARCHITECTURE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The fetched instruction is moved to which of the following register?
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PC
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I/O buffer register
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MAR
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CIR
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Explanation:
Detailed explanation-1: -As the data fetched during the fetch stage is an instruction, it is copied into the instruction register (IR).
Detailed explanation-2: -The instruction or data held in that memory address is sent along the data bus to the memory data register (MDR). The instruction or data held in the MDR is copied into the current instruction register (CIR). The instruction or data held in the CIR is decoded and then executed .
Detailed explanation-3: -The IR is used to store the instruction word. When the CPU fetches an instruction from memory, it is temporarily stored in the IR. The instruction is a binary word or code that defines a specific operation to be performed.
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