Instruction Execution Cycle

Instruction Execution Cycle - Components (a)(b) four main...

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Instruction Execution Cycle
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Components All computers can be summarized with  just two basic components:  (a) primary storage or memory and  (b) a central processing unit or CPU.
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four main components central processing unit (CPU) main memory I/O devices interconnection structures (bus) basis for almost all computer systems Von Neumann Architecture
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[David Jones] CPU Main Memory I/O Devices System Bus Control Unit Registers Arithmetic Logic Unit (ALU) Controllers Hardware Architecture
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Introduction At the grass roots of all modern  processors is a process which has  basically remained unchanged since the  inception of computers, that of the  instruction execution cycle.
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CPU The CPU is the "brains" of the computer CPU and I/O devices operate concurrently device controllers interface with the I/O devices one controller may handle several devices of the same type controllers have local buffers data are moved between main memory and the buffers of device controllers the CPU can access information directly only if it is kept in main memory
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CPU Registers registers are used for information that must be immediately accessible to the CPU they are integrated on the same chip important registers are: Arithmetic-Logic Unit (ALU) Performs arithmetic operations such as addition and  subtraction as well as logical operations such as AND,  OR and NOT.
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This note was uploaded on 07/15/2011 for the course ECO 2023 taught by Professor Mr.raza during the Summer '10 term at FAU.

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Instruction Execution Cycle - Components (a)(b) four main...

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