What is BIOS

ROM (Read Only memory)

• Integrated circuits that are used to permanently store start-up (boot) Instructions and other critical Information
• Types of ROM:

-PROM (Programmable Read Only memory)
-EPRom (Erasable programmable Rad Only memory)
-EEPROM (Electrically Erasable programmable Read Only Memory)


BIOS (Basic Input Output System)

• During the boot up it performs POST (Power On Self Test)
• Recognizes the hardware devices
• Locates and loads the Operating system
• It helps the Operating System to access the hardware devices