Bootstrap loader

A Brief expanation on bootstrap loading.

1. Bootstrap loader  can be called as bootloader , bootstrapping or boot-program.

2. BOOTLOADER  The term bootstrap comes from the old phrase ‘Pull yourself up by your bootstraps’.  A boot loader is a computer program that loads an operating system or some other system software for the computer after completion of the power-on self-tests .  I t is the loader for the operating system itself. Within the hard reboot process, it runs after completion of the self-tests, then loads and runs the software into memory.  resides in the computer's EPROM, ROM , or other non-volatile memory.

3. Steps in booting process :- When the computer power is turned on,the cpu initializes itself. On initialization of cpu,it looks in BIOS for start in first program. Its first instruction is to POST. POST checks all connected hardwares such as RAM ,secondary devices are working properly. Upon this process,if it concludes true then BIOS reads MBR on hard disk. Now BIOS loads MBR into RAM and then starts executing the boot program present in MBR.

4. Booting process