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Central Processing Unit (CPU) - users.encs.concordia.ca

Central Processing unit (CPU) CPU is the heart and brain It interprets and executes machine level instructions Controls data transfer from/to Main Memory (MM) and CPU Detects any errors In the following lectures, we will learn: Instruction representation Data transfer mechanism between MM and CPU The internal functional units of two different CPU architectures How these units are interconnected How a processor executes instructionsInstruction Representation CPU operation is determined by the instruction it executes Collection of these instructions that a CPU can execute forms its instruction set An instruction is represented as sequence of bits, for example: Instruction is divided into fields Opcodeindicates the operation to be performed, eg.

Instruction Representation •CPU operation is determined by the instruction it executes •Collection of these instructions that a CPU can execute forms its Instruction Set •An instruction is represented as sequence of bits, for example: •Instruction is divided into fields •Opcode indicates the operation to be performed, eg., 92 above ...

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