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Viglen BX130 – VIG385P User Manual
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Chapter 4: System BIOS
What is the BIOS?
The BIOS (Basic Input Output System) is an important piece of software which is
stored in a ROM (Read Only Memory) chip inside the computer. It consists of the
basic instructions for controlling the disk drives, hard disk, keyboard and
serial/parallel ports. The BIOS also keeps a list of the specifications of the computer
in battery-backed RAM (also known as the CMOS RAM) and provides a special
Setup program to change this information.
The Power-on sequence
When the computer is first switched on, certain instructions in the BIOS are executed
to test various parts of the machine. This is known as the POST (Power-On Self
Test) routine. When you switch the computer on (or when you press the Reset
button or press <CTRL> + <ALT> + <DELETE> keys, which has the same effect),
you can see on the monitor that it counts through the memory, testing it. The floppy
disk drives are then accessed and tested, and the various interfaces are checked. If
there are any errors, a message is displayed on the screen.
Having passed all the tests, and if you have activated the password facility, the BIOS
then asks you to enter the boot password to continue. The following section
describes how to do this. The BIOS then loads the operating system, either -
Windows 2000 or Windows XP, etc. - from the hard disk (or floppy disk if one is
inserted in Drive A:). The computer is then ready for use.
Overview of BIOS Features
Introduction
The Motherboard uses an Award BIOS, which is stored in a flash EEPROM and can
be upgraded using a disk-based program. In addition to the BIOS, the flash memory
contains the Setup program, Power-On Self Test (POST), the PCI auto-configuration
utility, and is Windows 95-ready Plug and Play. This Motherboard supports system
BIOS shadowing, allowing the BIOS to execute from 64-bit onboard write-protected
DRAM.
The BIOS displays a message during POST identifying the type of BIOS and the
revision code.
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