What is meant by BIOS ?

 

What is meant by BIOS?

The long-form meaning of BIOS is a Basic input-output system. And EPROMs are commonly used to store BIOS programs. And used by the CPU (central processing unit) when the machine is switched on, to perform start-up procedures.

And it has two major procedures: deciding what peripheral devices are available and loading the operating system into main memory. After start-up, the BIOS software handles data flow between the operating system and the peripherals, so neither the operating system nor the application programs need to know the peripheral information.

 

Contribution of bios to the computer

·        The BIOS of a computer's main function is to control the initial stages of the start-up process. Ascertaining that the operating system has been properly loaded into the computer's memory. Bios is essential to the operation of most modern computers and understanding it will help you troubleshoot problems with your system.

 

·        POST (Power on self-test)

-        Checking computer hardware to ensure that it can complete successfully

·        Start-up

-        Following the completion of the POST process, the BIOS attempts to load the operating system using a program known as a bootstrap loader, which is programmed to find any usable operating system. If an operating system is discovered, it is installed in the computer's memory.

·        Security

-        Security is also part of BIOS. And that BIOS software can protect the boot process with password-protection.

·        Hardware

-        BIOS software itself generally resides on a Read-Only memory or ROM or flash memory chip attached to the computer’s motherboard.

 

 

In a Personal computer, where is the current date and time along with the bios and configuration details stored?

It stored in CMOS memory chip in computer motherboard (Complementary Metal-Oxide semiconductor, powered with a CMOS battery.

The time and the date are stored on the motherboard, there is a memory chip. This chip is a simple flash memory like a pen drive. Which can keep data without being connected to electricity. There is also a battery in the heart to keep a real-time clock. chip running that measures time while your PC is off and disconnected from the wall plug.

 

 

 

 

Different between BIOS and CMOS

BIOS is the program that starts with computer start-up and the Complementary metal oxide semiconductor (CMOS) is where the BIOS stored the date and time and configuration details it needs to start the computer.

BIOS	CMOS
Start-up Program	System Configurations and data for Boot the system
Non-Volatile	Volatile
Basic input-output system is the long-form	Complementary metal-oxide a semiconductor is the long-form

 

BIOS Errors

·        Failed to overclock

-        If the system is not manually overclocked the RAM or processer before this error was displayed, then it is most likely caused by a memory frequency issue.

·        Failed Device

-        This massage means that there is a hardware failure. Alternatively, when a new flash drive, USB device, or HDD drive is inserted into the machine.