Linux boot process

The system BIOS is the first program that runs when you click the power button.
1. First the motherboard needs to receive a stable power supply signal. If there is no stable power supply the system shuts down automatically.
2. When a stable power supply signal is received, the processor starts, and a boot code is found in a small section of the BIOS ROM when the processor starts up, and this 16-byte code tells the processor where to look for the actual BIOS boot program.
3. The BIOS performs post. If a fatal error is found, startup processing will end. If successful, the BIOS calls the number 19th interrupt and the processor will look for the attached device on the motherboard.
4. The BIOS first looks for the video card, if found the video card may be able to output some information on the screen.
5. Look for the remaining equipment.
6. The BIOS displays its startup information on the screen.
7. The BIOS will perform additional tests, which are dependent on the manufacturer. Typically includes memory capacity checks.
8. Check the hardware to see if the hardware is working properly.
9. BIOS Print System configuration information.
10.BIOS finds the system from top to bottom based on the configured boot order. If the hard drive is found, then to 0 cylinders, 0 heads, 1 sector lookup boot record MBR. The others did not say (¯¸¯)
11. Read the MBR program into memory and execute it. The MBR tries to locate the bootable partition in the partitioned table, and if found, the system's own initialization starts the program into memory and runs.

I haven't seen the introduction about the boot program ~ ~ ~ ~ (¯.¯)

Linux boot process