December 2001
Intermediate to advanced
912 pages
24h 44m
English
Content preview from Microsoft® Windows® XP Unleashed
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How Your Computer Boots
When you press the power button on your computer, power is provided to all the components and the boot process begins. This process happens basically as follows:
1. |
As soon as power is supplied to your main system board, a process called the Power On Self Test (POST) begins. This process is controlled by read-only memory (ROM) chips on the main board that test the more important pieces of hardware on the computer.
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2. |
Control of the testing process is first passed to your graphics adapter so that it can test itself. This is why the first screen you see on starting a computer is usually a blank screen with information on your graphics adapter at the top.
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3. | Next, control is passed back to the regular POST routine and ... |
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