PRESENTATION ON BIOS ie basic input and output system.

2. What is Bios? The BIOS is boot firmware, designed to be the first code run by a PC when powered on . The initial function of the BIOS is to identify, test, and initialize system devices such as the video display card , hard disk , floppy disk and other hardware . The BIOS sets the machine hardware into a known state, so that software stored on compatible media can be loaded, executed, and given control of the PC.

3. Bios as interface between OS and Hardware

5. Motherboard Bios All motherboards must have a special chip containing software called the ROM BIOS . This ROM chip contains the startup programs and drivers used to get the system running and act as the interface to the basic hardware in the system . When you turn on a system, the power on self test ( POST ) in the BIOS also tests the major components in the system . Additionally, you can run a setup program to store system configuration data in the CMOS memory, which is powered by a battery on the motherboard . This CMOS RAM is often called NVRAM ( nonvolatile RAM ) because it runs on about 1 millionth of an amp of electrical current and can store data for years when powered by a tiny lithium battery .

6. Functions of Bios

7. The POST tests your computer's processor, memory, chipset, video adapter, disk controllers, disk drives, keyboard, and other crucial components. POST ( power on self test ).

9. Setup Screen

12. Amibios

13. Awardbios

14. Flashbios

15. CMOS Setup Specifications

17. Main Allocates resources for hardware components .

22. Setup Configuration