COMPUTER SCIENCE AND ENGINEERING
COMPUTER ARCHITECTURE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Address Bus
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Data Bus
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Control Bus
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System Bus
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Detailed explanation-1: -The program counter now holds the address of the next instruction to be fetched. The processor sends a signal containing the address of the instruction to be fetched along the address bus to the computer’s memory. The instruction held in that memory address is sent along the data bus to the MDR.
Detailed explanation-2: -The pc holds the memory address of the next instruction to be fetched from main memory. The CPU decodes the instruction.
Detailed explanation-3: -The Data Bus carries Instructions and Data to and from the memory. The Address Bus carries information about where in memory the data is coming from or going to. The Control Bus is used to tell the memory which way data is going (read/write).
Detailed explanation-4: -The Control Unit generates the control signals that copy an instruction byte from the memory into the Instruction Register, IR. The address of this instruction is in the Program Counter, PC. The 8 bits in the IR are connected to the Control Unit.