The program and the necessary data are entered into the computer system from an input device, and are stored in main memory where they can be accessed as needed.
Now, the CPU retrieves the instructions from the main memory, one by one, and decodes each instruction to determine what operation to be performed.
When required by instruction, the CPU also retrieves the necessary data from main memory.
The CPU then performs the operation required by the instruction, which might be arithmetic or logical operation. As each instruction is performed, the results are either temporarily saved by the CPU or are stored in main memory.
The processing cycle (retrieve instruction, decode and execute instruction, save results) is repeated until all the program instructions have been carried out by the CPU. The final results are then either stored in main memory, or are sent to an output device such as a printer.
Related Keywords:
How Computer Works
How Computer Boots
Boot Startup of Computer
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Now, the CPU retrieves the instructions from the main memory, one by one, and decodes each instruction to determine what operation to be performed.
When required by instruction, the CPU also retrieves the necessary data from main memory.
The CPU then performs the operation required by the instruction, which might be arithmetic or logical operation. As each instruction is performed, the results are either temporarily saved by the CPU or are stored in main memory.
The processing cycle (retrieve instruction, decode and execute instruction, save results) is repeated until all the program instructions have been carried out by the CPU. The final results are then either stored in main memory, or are sent to an output device such as a printer.
Related Keywords:
How Computer Works
How Computer Boots
Boot Startup of Computer
How PCs Work?
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