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BIOS ABCs
BIOS Simulations
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Motherboard definitions

BIOS ABCs

Every computer with a motherboard includes a special chip referred to as the BIOS or ROM BIOS (Read Only Memory Basic Input/Output System). The BIOS includes instructions on how to load basic computer hardware. The BIOS also includes a test referred to as a POST (Power On Self Test) which will ensure that the computer meets requirements to boot up properly. If the computer does not pass the POST, you will receive a combination of beeps indicating what is malfunctioning within the computer.

In most PCs, the BIOS has 4 main functions:

POST - Test computer hardware, ensuring hardware is properly functioning before starting process of loading operating system. Additional information on the POST can be found on our POST / Beep Codes page.

Bootstrap Loader - Process of locating the operating system. If capable operating system located, BIOS will pass the control to it.

BIOS - Software / Drivers which interfaces between the operating system and your hardware. When running DOS or Windows you are using complete BIOS support.

BIOS / CMOS Setup - Configuration program which allows you to configure hardware settings including system settings such as computer passwords, time, and date.

Below you will find links which include screenshots, simulations, and additional information for various BIOS manufacturer's products.

AMI BIOS
PHOENIX BIOS
PHOENIX - AWARD BIOS