软硬件系统编程PPT (20).pdf
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1、什么是操作系统什么是操作系统?What is the operating system?Microcomputer System Computer SystemComputer System hardwarehardware softwaresoftware systemsystem softwaresoftware applicationapplication softwaresoftware OSOS systemsystem applicationsapplications Operating system What is the operating systemWhat is the
2、operating system?3 What are its main functions?What are its main functions?What roles does it play in computers?What roles does it play in computers?Operating System(OS)Operating System is a set of programs which controls and manages software and hardware resources of the computer.Interface for user
3、-computer communication.Functions:Manage system resources Provide a user-friendly interface 4 Processor,storage,input and output devices,and various information 5 OS hierarchy Hardware system File management Windows operating system interface user Data input and output;Data storage File access Power
4、ful virtual machine Program data B005 0408 8804 5+8 memorymemory Must consider:How to input and output data?How to store and manage data Without OS,programs can only be written by Machine Instructions.I/O devices management,storage management It is the first layer of software on the hardware,and is
5、a must for all types of computers.All other software run on the operating system.6 OS is.Hardware system OS Application software 1.Serving as an interface between users and computer hardware.Hide hardware so that users dont have to consider the differences among different hardware;Provide an interfa
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