What is BIOS?

What is BIOS?Acronym for Basic Input Output System, Bios is the most basic and the most important chip on your laptop motherboard that offers the most low-grade and the most direct hardware control for your laptop. The primitive operation of laptop according to Bios. In other words, Bios is a bridge between hardware and software.
The following are a picture of what a BIOS chip may look like in your laptop.Picture 1DIP encapsulation of bios
picture 2

PLCC encapsulation of bios
PLCC encapsulation of bios
the bios instructions on load basic computer hardware and test Power On Self Test program (POST)that verify whether the laptop is good. If your laptop does not pass the Power on Self Test program, this laptop will sounded the alarm.
Bios Functions:POST and initialization:when power your laptop, the bios be priority activate .then the bios test computer hardware, ensuring hardware is properly functioning before starting process of loading operating system. If capable operating system located, the bios give the control power to users. if this laptop cannot loading operating system, this laptop will sounded the alarm or unresponsive.BIOS service Software and Drivers ：That interface between the operating system and your hardware. When running Windows or software you are using complete BIOS support. an interface which generally has the ability to gain mastership of the bus in order to give the central processor the address of a subroutine which the processor will use to service the peripheral.
BIOS and CMOS Setup:
Configuration program that allows you to configure hardware settings including system settings such as computer passwords, time, and date.
Bios Type:The most common of bios type: AMI, Award, Phoenix.
Bios Species:FLASH ROM: is a non-volatile computer memory that can be electrically erased and reprogrammed, such as 29、39、49 series;
EEPROM: is a type of non-volatile memory used in computers and other electronic devices to store small amounts of data that must be saved when power is removed. Such as 28F series;EPROM: is a type of memory chip that retains its data when its power supply is switched off; Such as 27 seriesPROM: is a form of digital memory where the setting of each bit is locked by a fuse or antifuse.MARK PROM: is a type of memory that can not erased.

Tags: BIOS, laptop motherboard