bios seminar presentation
TRANSCRIPT
Computer and InformationComputer and Information
Technology for (HKCEE)Technology for (HKCEE)
Module B: Part CModule B: Part C
Page1© Longman Hong Kong Education
Maharana Pratap College of Maharana Pratap College of Technology, GwaliorTechnology, Gwalior
Seminar file
Sub. Code-BE607
Submitted to: Submitted by:
Mrs. Poonam Sharma vikalp kulshrestha
Lect. IT & CS Dept. Roll no. 0903ec061114
Date: 20.05.09
Computer and Information Technology for (HKCEE) Module BComputer and Information Technology for (HKCEE) Module B
AA Project Project report report
PresentationPresentationonon
AA Project Project report report
PresentationPresentationonon
Computer and Information Technology for (HKCEE) Module BComputer and Information Technology for (HKCEE) Module B
The BIOSThe BIOS Basic Input/Output Basic Input/Output SystemSystem
by Bharat Sharmaby Bharat Sharma Roll no. 0903IT061011Roll no. 0903IT061011
Introduction to BIOSIntroduction to BIOS
Basic Input / Output System (BIOS)boot the computer by providing a basic set of instructions
load the operating system after turning on the computer
perform POST (Power-On Self Test)
provide set-up program for changing BIOS parameters
provide low-level routines for the communications between OS and hardware devices
Introduction to BIOSIntroduction to BIOS
BIOS combinationBIOS program
CMOS stores BIOS program
BIOS parameter
Introduction to BIOSIntroduction to BIOS
Advantages of storing BIOS in ROMcode and data are readily available during booting
BIOS content are not corrupted by errant applications
BIOS hardware componentsBIOS ROM
PC startup program (POST)
BIOS CMOS memoryhouse the configuration information of individual PC
Introduction to BIOSIntroduction to BIOS
The BIOS ROMAll BIOS are contained in ROM in old days
BIOS is now located in EEPROM chiperased and rewritten by special programs
called flash BIOS
BIOS CMOS memoryprovide a non-volatile storage for PC’s control information
need very little power to operate
powered by lithium battery
Introduction to BIOSIntroduction to BIOS
BIOS chip
The BIOS Boot ProcessThe BIOS Boot Process
1. The power supply sends a signal to the components in the system unit.
2. The CPU finds the ROM chips that contains BIOS.
3. The BIOS performs the POST which checks components (e.g. mouse, keyboard connectors and expansion card)
4. The results of the POST are compared with data in the CMOS chip.
The BIOS Boot ProcessThe BIOS Boot Process
5. The BIOS looks for the system files in floppy disk drive and hard disk.
6. The system files and the kernel of the OS load into RAM from hard disk.
The BIOS Boot ProcessThe BIOS Boot Process
Beep codesA series of beep: BIOS program encounter problems
One short beep: everything is normal
Errors can be indicated when video screen does not function
Interpret the beep codes by consulting main board menu
The BIOS Boot ProcessThe BIOS Boot Process
POST Error messagesError messages are shown on display system
Interpret error messages by consulting owner’s manual
Configuring the BIOSConfiguring the BIOS
Setup program interfaces1. Hit a particular key or key combination at a right
time to enter the BIOS setup utility
Configuring the BIOSConfiguring the BIOS
Setup program interfaces2. A BIOS setup screen is displayed.
Configuring the BIOSConfiguring the BIOS
Typical key controlIncorrect settings of BIOS may lead to system halt
Quit the setup without saving changes if we are not sure about the changed settings
Boot sequencecontrol the order in which BIOS looks for an OS on start-up
usual sequence: floppy disk hard disk CD-ROM
Configuring the BIOSConfiguring the BIOS
Typical key controlPerformance tuning through BIOS settings
BIOS settings are responsible for how the chipset is controlled.
Chipset is the key to the overall system performance
BIOS parameters:– Choose the optimal bus speed settings
– Enable the CPU’s internal cache
– External cache memory
– Enable system BIOS shadowing
– Quick power-on self test
– Update the BIOS
Computer and InformationComputer and Information
Technology for (HKCEE)Technology for (HKCEE)
Module B: Part CModule B: Part C
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Operating System (OS)Operating System (OS)
Works with system BIOS and device drivers to provide instructions to hardware to perform tasks
Computer and InformationComputer and Information
Technology for (HKCEE)Technology for (HKCEE)
Module B: Part CModule B: Part C
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How BIOS Finds/Loads the OSHow BIOS Finds/Loads the OS
Computer and InformationComputer and Information
Technology for (HKCEE)Technology for (HKCEE)
Module B: Part CModule B: Part C
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Parts of the Boot ProcessParts of the Boot Process
Step 1: POST
Step 2: ROM BIOS startup program searches for and loads an OS
Step 3: OS configures the system and completes its own loading
Step 4: User executes application software
Computer and InformationComputer and Information
Technology for (HKCEE)Technology for (HKCEE)
Module B: Part CModule B: Part C
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Boot Step 1Boot Step 1
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Module B: Part CModule B: Part C
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BootStep 2
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Boot Step 3Boot Step 3
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Module B: Part CModule B: Part C
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End…End…
Thank you……..