Flaresplitz
Edited by Flaresplitz, 11 March 2010 - 06:47 PM.
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Edited by Flaresplitz, 11 March 2010 - 06:47 PM.
Each time the computer boots up the computer must past the POST. Below is the common steps a POST performs each time your computer starts.
1. Test the power supply to ensure that it is turned on and that it releases its reset signal.
2. CPU must exit the reset status mode and thereafter be able to execute instructions.
3. BIOS checksum must be valid, meaning that it must be readable.
4. CMOS checksum must be valid, meaning that it must be readable.
5. CPU must be able to read all forms of memory such as the memory controller, memory bus, and memory module.
6. The first 64KB of memory must be operational and have the capability to be read and written to and from, and capable of containing the POST code.
7. I/O bus / controller must be accessible.
8. I/O bus must be able to write / read from the video subsystem and be able to read all video RAM.
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