Nvidia N61S Manuel d'utilisateur télécharger pdf (Page 18)

- 17 -

nVIDIA N61P/N61S/N61V User's /Manual

Chapter 4 BIOS Setup Utility

BIOS stands for Basic Input and Output System. It was once called ROM BIOS when it was

stored in a Read-Only Memory (ROM) chip. Now manufacturers would like to store BIOS in

EEPROM which means Electrically Erasable Programmable Memory. BIOS used in this series

of mainboard is stored in EEPROM, and is the first program to run when you turn on your

computer.

BIOS performs the following functions:

1. Initializing and testing hardware in your computer (a process called "POST", for Power On

Self Test).

2. Loading and running your operating system.

3. Helping your operating system and application programs manage your PC hardware by

means of a set of routines called BIOS Run-Time Service.

4.1 About BIOS Setup

BIOS Setup is an interactive BIOS program that you need to run when:

1. Changing the hardware of your system. (For example: installing a new Hard Disk etc.)

2. Modifying the behavior of your computer. (For example: changing the system time or date,

or turning special features on or off etc.)

3. Enhancing your computer's behavior. (For example: speeding up performance by turning

on shadowing or cache)

4.2 To Run BIOS Setup

First access BIOS setup menu by pressing <DEL> key after “POST” is complete (before OS is

loaded). BIOS will then display the following message:

4.3 About CMOS

CMOS is the memory maintained by a battery. CMOS is used to store the BIOS settings you

have selected in BIOS Setup. CMOS also maintains the internal clock. Every time you turn

on your computer, the BIOS looks into CMOS for the settings you have selected and

congures your computer accordingly. If the battery runs out of power, the CMOS data will

be lost and POST will issue a “CMOS invalid” or “CMOS checksum invalid” message. If this

happens, you have to replace the battery and check and congure the BIOS Setup for the

new start.

4.4 The POST (Power On Self Test)

POST is an acronym for Power On Self Test. This program will test all things the BIOS does

before the operating system is started. Each of POST routines is assigned a POST code, a

unique number which is sent to I/O port 080h before the routine is executed.

DEL: SETUP

1 2 ... 13 14 15 16 17 18 19 20 21 22 23 ... 36 37

Pas de commentaire

Nvidia N61S Manuel d'utilisateur Page 18