What Are the Steps of Power on Self Test

Find, size, and verify the system main memory.Initialize BIOS.Identify, organize, and select which devices are available for booting.Verify CPU registers.Verify the integrity of the BIOS code itself.Verify some basic components like DMA, timer, interrupt controller.

How do you do a Power On Self Test?

1. verify CPU registers.
2. verify the integrity of the BIOS code itself.
3. verify some basic components like DMA, timer, interrupt controller.
4. initialize, size, and verify system main memory.
5. initialize BIOS.

What happens after Power On Self Test?

When the computer is turned on or restarted, it first performs the power-on-self-test, also known as POST. If the POST is successful and no issues are found, the bootstrap loader will load the operating system for the computer into memory.