POST refers to the processor; memory chipset graphics card hard disk A program that checks if a computer component, such as a keyboard, is working properly.
2. Setup Program
The Setup Program is a menu-driven program that allows you to enter a program and enter a date/time password, You can adjust the boot order and other settings as needed. The settings we modified are saved on CMOS RAM. Every time I turn on the computer, I read the settings in the CMOS RAM and boot.