What are the booting steps for a CPU

 What are the booting steps for a CPU?

• The power supply does a self check and sends a power-good signal to the CPU.

The CPU starts executing the code stored in ROM on the motherboard starts the address 0xFFFF0.

• The routines in ROM test the central hardware, search for video ROM, perform a checksum on the video ROM and executes the routines in video ROM.
• The routines in the mother board ROM then continue searching for any ROM, checksum and executes these routines.
• After performing the POST (Power On-Self Test) is executed. The system will search for a boot device.
• Assuming that the valid boot device is found, IO.SYS is loaded into memory and executed. IO.SYS consists primarily of initialization code and extension to the memory board ROM BIOS.
• MSDOS.SYS is loaded into memory and executed. MSDOS.SYS contains the DOS routines.
• CONFIG.SYS (created and modified by the user. load additional device drivers for peripheral devices), COMMAND.COM (It is command interpreter- It translates the commands entered by the user. It also contains internal DOS commands. It executes and AUTOEXEC.BAT), AUTOEXEC.BAT (It contains all the commands that the user wants which are executed automatically every time the computed is started).