ganesh_mys11

 Profile Answers by ganesh_mys11 Questions by ganesh_mys11

• Jan 14th, 2008

 

The computer startup is known as boot processing of computer.  Booting will start from BIOS &  CMOS.

In booting there are 5 stages.

dishaV

 Profile Answers by dishaV 

• Feb 16th, 2008

 

As soon as the CPU is turned on, it initializes itself and looks for ROM BIOS for the first instruction which is the Power On Self-Test (POST). This process checks the BIOS chip and then the CMOS RAM. After checking everything and detecting no power failure, it checks the hardware devices and the storage device. Then CMOS looks through the boot sequence of drives to find the OS. The boot sequence is the sequence of drives which the CMOS scans to find OS and load it. Generally, OS is stored in C drive. If it is not found there, the next drive to scan is A drive that is the floppy drive.
Hence on finding the OS, it is loaded. Its files are copied to main memory by BIOS, and from here, the Os takes the charge of boot process like loading device drivers etc.