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The Boot Process - Lecture Notes | BU 396, Study notes of Introduction to Business Management

Material Type: Notes; Professor: Tollison; Class: Systems Oper Mgmt CANCELLED; Subject: Business; University: Mississippi University for Women; Term: Fall 2007;

Typology: Study notes

Pre 2010

Uploaded on 08/07/2009

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The Boot Process
August 28 (Day); August 22 (Night)
The boot process is everything that occurs from when the power button on the computer is
pressed until the operating system’s desktop appears on the screen.
Read Only Memory:
oRead only memory (ROM) is a type of memory with two distinctive characteristics:
It is permanent and nonvolatile.
It is unchangeable or requires a special operation to change.
oBasic data about hardware is typically stored in ROM.
Basic Input / Output System:
oBasic input / output system (BIOS) is special built-in software that gives instructions
to a piece of hardware or entire computer without having to access the hard drive or
temporary memory.
oBIOS is typically stored on a ROM chip.
oThe System BIOS is stored on a chip on the motherboard and contains all of the code
necessary to control the keyboard, monitor, disk drives, and a number of other basic
functions.
oThe System BIOS is typically stored on flash ROM (p. 104).
oThe BIOS information is typically the first thing you see upon turning on your
computer (p. 105).
oAward and Phoenix are the two most prominent BIOS manufacturers (p. 102).
ROM Chip for System BIOS
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The Boot Process August 28 (Day); August 22 (Night)  The boot process is everything that occurs from when the power button on the computer is pressed until the operating system’s desktop appears on the screen.

 Read Only Memory:

o Read only memory (ROM) is a type of memory with two distinctive characteristics:

 It is permanent and nonvolatile.

 It is unchangeable or requires a special operation to change. o Basic data about hardware is typically stored in ROM.

 Basic Input / Output System:

o Basic input / output system (BIOS) is special built-in software that gives instructions to a piece of hardware or entire computer without having to access the hard drive or temporary memory. o BIOS is typically stored on a ROM chip. o The S ystem BIOS is stored on a chip on the motherboard and contains all of the code necessary to control the keyboard, monitor, disk drives, and a number of other basic functions. o The System BIOS is typically stored on flash ROM (p. 104). o The BIOS information is typically the first thing you see upon turning on your computer (p. 105). o Award and Phoenix are the two most prominent BIOS manufacturers (p. 102). ROM Chip for System BIOS

 System Setup Utility:

o The System Setup utility is an interface that enables you to make changes to the setup and basic configuration of your computer (p. 104). o Accessing the System Setup utility is different depending on the BIOS manufacturer (p. 105). o A term to describe the System Setup Utility is CMOS (Complimentary Metal-Oxide Semiconductor). CMOS is a battery-powered, volatile memory used by older computers to store customized BIOS settings. CMOS Setup Utility  The Boot Process:

  1. When the computer’s power is first turned on, the processor initializes itself.
  2. The processor looks in the System BIOS’s ROM for the first instruction
  3. The System BIOS take control. a. The BIOS checks for customized settings. b. Device drivers are loaded from ROM for all important devices.

c. The Power-on Self Test (POST) is performed. The POST checks to ensure

that all essential devices are working properly. d. System settings are displayed on the screen.

e. The bootstrap program is loaded.

  1. The bootstrap program takes control. a. The bootstrap program looks in the customized settings and checks its boot sequence.