What happens when your PC on? II
Another way to see what is actually happen when your pc is powered on is in these 10 ways.Well this is actually more step by step to understand how is the pc is running on until we as user can use it basically.The step by step to explain it is normally called as (POST):
Power-On Self Test (POST) is a series of tests to make certain that necessary is present and properly operating.
1. First the Central Processing Unit (CPU) is reset.
2. The CPU checks itself and the POST program stored in the BIOS memory.
3. Then the CPU begins using the code located in BIOS to check components in the PC.
4. The DRAM is tested by writing and reading back every byte to insure proper operation.
5. The Keyboard is checked for attachment and to see if any key has been pressed.
6. Pushing certain keys during boot up tells the CPU you want to modify the BIOS code.
7. The Floppy and Hard Drives are checked to make sure they are present.
8. The Mouse is also checked to make sure it is attached.
9. Finally, the test results are compared to the configuration data in the BIOS.
10. Any mismatches causes the POST to fail and an error message appears on the display.
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