TAILIEUCHUNG - Lecture Operating systems: Internals and design principles (6/E): Chapter 1 - William Stallings

Chapter 1 "Computer system overview". After studying this chapter, you should be able to: Describe the basic elements of a computer system and their interrelationship, eplain the steps taken by a processor to execute an instruction, understand the concept of interrupts and how and why a processor uses interrupts,. | Chapter 1 Computer System Overview Patricia Roy Manatee Community College, Venice, FL ©2008, Prentice Hall Operating Systems: Internals and Design Principles, 6/E William Stallings 1 Operating System Exploits the hardware resources of one or more processors Provides a set of services to system users Manages secondary memory and I/O devices 2 Basic Elements Processor Two internal registers Memory address resister (MAR) Specifies the address for the next read or write Memory buffer register (MBR) Contains data written into memory or receives data read from memory 3 Basic Elements Processor I/O address register I/O buffer register 4 Basic Elements Main Memory Volatile Referred to as real memory or primary memory 5 Basic Elements I/O Modules Secondary Memory Devices Communications equipment Terminals System bus Communication among processors, main memory, and I/O modules 6 Computer Components: Top-Level View 7 Processor Registers User-visible registers Enable programmer to minimize main

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