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The bootloader needs to initialize peripherals needed for its operation, usually we need the screen the keyboard and optionaly the mouse. In embedded systems we need a terminal. Sometimes when we boot from network we need network connection so we have to initialize ethernet card.
These initializations are usually just for the bootloader.
The Operating System usually overrides them or not using them at all.
Decide which OS image to start
Moves itself to RAM for actual work
|Prepared by Ori Idan Helicon technologies|