ch1 - Chapter 1: Introduction Chapter Adapted to COP4610 by...

Info iconThis preview shows pages 1–8. Sign up to view the full content.

View Full Document Right Arrow Icon
Chapter 1: Introduction Chapter 1: Introduction Adapted to COP4610 by Robert van Engelen
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
1.2 Silberschatz, Galvin and Gagne ©2005 Operating System Concepts – 7 th Edition, Jan 12, 2005 What is an Operating System? What is an Operating System? A program that acts as an intermediary between a user of a computer and the computer hardware Operating system goals: Execute user programs and make solving user problems easier Make the computer system convenient to use Use the computer hardware in an efficient manner
Background image of page 2
1.3 Silberschatz, Galvin and Gagne ©2005 Operating System Concepts – 7 th Edition, Jan 12, 2005 Four Components of a Computer System Four Components of a Computer System Computer system can be divided into four components: 1. Hardware – provides basic computing resources CPU, memory, I/O devices 1. Operating system Controls and coordinates use of hardware among various applications and users 1. Application programs – define the ways in which the system resources are used to solve the computing problems of the users Word processors, compilers, web browsers, database systems, video games 1. Users People, other machines, …
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
1.4 Silberschatz, Galvin and Gagne ©2005 Operating System Concepts – 7 th Edition, Jan 12, 2005 Operating System Definition Operating System Definition OS is a resource allocator Manages all resources Decides between conflicting requests for efficient and fair resource use OS is a control program Controls execution of programs to prevent errors and improper use of the computer
Background image of page 4
1.5 Silberschatz, Galvin and Gagne ©2005 Operating System Concepts – 7 th Edition, Jan 12, 2005 Operating System Definition (Cont.) Operating System Definition (Cont.) No universally accepted definition “Everything a vendor ships when you order an operating system” is good approximation But varies wildly “The one program running at all times on the computer” is the kernel. Everything else is either a system program (ships with the operating system) or an application program
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
1.6 Silberschatz, Galvin and Gagne ©2005 Operating System Concepts – 7 th Edition, Jan 12, 2005 Computer Startup Computer Startup bootstrap program is loaded at power-up or reboot Typically stored in ROM or EEPROM, generally known as firmware Initializates all aspects of system Loads operating system kernel and starts execution
Background image of page 6
1.7 Silberschatz, Galvin and Gagne ©2005 Operating System Concepts – 7 th Edition, Jan 12, 2005 Booting Procedure for i386 Machines Booting Procedure for i386 Machines ROM stores a Basic Input/Output System (BIOS) BIOS contains information on storage devices (disks) Performs Power-On Self Test (POST) Runs the bootstrap program after POST The master boot record (MBR) is loaded from the boot device The MBR is stored at the first logical sector of the boot device Fits into a single 512-byte disk sector ( boot sector
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 8
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 10/11/2011 for the course COP 4610 taught by Professor Robertengelen during the Spring '11 term at FSU.

Page1 / 29

ch1 - Chapter 1: Introduction Chapter Adapted to COP4610 by...

This preview shows document pages 1 - 8. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online