COMPUTER SCIENCE AND ENGINEERING
COMPUTER ORGANIZATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Current Instruction Register
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Program Counter
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Memory Data Register
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Accumulator
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Detailed explanation-1: -In computing, the instruction register (IR) or current instruction register (CIR) is the part of a CPU’s control unit that holds the instruction currently being executed or decoded.
Detailed explanation-2: -Instruction register: Each instruction to be executed is loaded into the instruction register. It also contains instruction that is currently being executed.
Detailed explanation-3: -The register which stores the address of the next instruction is called the program counter.
Detailed explanation-4: -Memory Address Register: The ‘MAR’ (Memory Address Register) is the CPU register that either stores the memory address from which data will be fetched to the CPU or the address to which data will be sent and stored. MAR holds the address of the location to be accessed from memory.