Fundamental 2. Lec#04. Shugofa Hassani

Transcription

1 Fundamental 2 Lec#04 Shugofa Hassani

2 Session Objective To distinguish between commercial and non commercial operating system To understand Ms.- DOS operating system and it s type. To practice basic DOS operating system Commands.

3 Commercial Software Commercial software is any software or program that is designed and developed for licensing or sale to end users or that serves a commercial purpose. such as Microsoft product. Commercial software was once considered to be proprietary software, but now a number of free and open-source software applications are licensed or sold to end users but with the source code to allow customization. So there is commercial free software, and there is noncommercial non free software.

4 Con.. Mac OS _ The Operating System for the imac and other Apple computers. Sky OS_ is an operating system written from scratch for x86 PC's. As required for a modern operating system, it supports features such as multiprocessor support (SMP), 64-bit journal file system, virtual memory, memory protection, multitasking and threading etc. Additionally, Sky OS has a built-in GUI system named Sky GI.

5 DOS operating system Stands for "Disk Operating System." DOS was the first operating system used by IBM compatible computers. DOS is a 16 bit operating system that means it can save and process 16 bit of data at a single time. It is a single user and single tasking Operating system. It is NON-GUI(Graphical User Interface) It Works on CUI(Character User Interface)environment.

6 Con.. The DOS kernel provides various functions for programs (an application program interface), like character I/O, file management, memory management, program loading and termination. DOS uses a command line, or text-based interface, that allows the user to type commands. By typing simple instructions such as pwd (print working directory) and cd (change directory),these early operating systems did not multitask, as they were only able to run one program at a time.

7 Con.. The command line interface, in which a user has to type in commands, required the user to remember commands to run programs or do other operating system tasks, making it difficult for inexperienced person to use. which is why Microsoft later bundled the graphic-based Windows operating system with DOS. When Microsoft first introduced Windows as a graphical user interface (GUI) for MS-DOS, early users had to type "WIN" at the DOS prompt to launch the Windows program.

8 Con.. Windows has since evolved from being a GUI program running under DOS to a full operating system taking over as the default OS, though it was not until Windows XP that consumer versions of Windows stopped relying on the DOS program win.com to bootstrap the Windows kernel. The last retail version of MS-DOS was MS-DOS After this release, MS-DOS was still bundled as part of Windows, but no longer required a separate license. It can still be run under Windows using the Command Prompt program. There is an open source version of DOS called FreeDOS which is based on and compatible with MS-DOS.

9 Con.. There are basically two versions of MS-DOS (DOS Operating System): a) Pc-DOS b) Ms.- DOS Above Both versions of DOS Operating System have been developed by Microsoft Corporation, here Pc-DOS was specially developed for IBM Personal computer and Ms.- DOS was developed and written for Personal computers or NON-IBM Personal Computers. As there are no such differences found in both versions of DOS Operating Systems.

10 DOS - file system DOS uses a file system which supports 8.3 filenames 8 characters for the filename and 3 characters for the extension. the maximum length of a fully qualified filename with is path that DOS supports is 80 characters using the format drive:\path\filename.ext. DOS uses the File Allocation Table (FAT) file system that the latest version of MS-DOS 7.1 could support hard drives up to 137 GB.

11 Con.. DOS use the tree structure to manages files and directories, which there is a root directory and all others directories and sub directories are under the root directory. DOS has three important parts : Booting files : To boot the system Management files : To mange files and folders Utility files : To mange, configure, repair system resource.

12 versions of MS-DOS MS-DOS 1.x Version 1.10 Version 1.11 Version 1.14 (OEM) Version 1.24 (OEM) Version 1.25 (OEM) MS-DOS 2.x Version 2.0 Version 2.1 Version 2.11 MS-DOS 3.x Version 3.0 Version 3.1 Version 3.2 Version 3.3 Version 3.21 Version 3.22 Version 3.25 Version 3.31 MS-DOS 4.x Version 4.00 Version 4.01 Version 4.01a MS-DOS 5.x Version 5.0 Version 5.0a Version 5.50 MS-DOS 6.x Version 6.0 Version 6.2 Version 6.21 Version 6.22

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14 Free DOS Free DOS is a DOS-compatible operating system and package of separate programs made up of open source software. licensed under the GNU General Public License (GPL). Free DOS is designed for use on IBM PC compatible computers and supports older and the newer IBM hardware. The Free DOS project was started in 1994 after Microsoft stopped support of MS-DOS. The latest version of Free DOS (version 1.0) was released in 2006

15 MS. DOS basic commands There is two type of DOS operating system commands. Internal commands : The commands which carry to memory when DOS load and its running by commands.com file. External commands : The commands which do not carryout to memory when DOS load due needs of more memory and its running by exactable file which must locate on hard disk. C:, D:, E: To change the drive Cd.. Cd /users/shugofa cd /d C:\Windows Mkdir Md Mkdir /a/b Change to parent directory Change to specific directory Change the directory and drive in on command To make directory To make directory To make a series of directory

16 Con.. Dir Echo file content > filename Type Copy ren Rename Del Dr Date Time Cls To display the content of a directory To create a file To display the content of a file To copy a file To rename a file or a folder To rename a file or a folder To delete a file To delete a directory To show the current date and set new date To show the current time and set new time Clear screen

17 Exercise #4 Short Answers 1- What is a commercial software? 2- what is the concept of tree structured file system? 3-what are the mean parts of DOS operating system? 4- how to make and remove a directory in CMD? 5- what types are DOS commands? 6-What does DOS stand for? 7-What is the different between PC DOS and Ms. Dos? 8-what are the types of commercial software? 10- which interface DOS used? 12-what is an example of commercial operating system? 13- which type of file system DOS used and what is the file name size in DOS?

18 Assignment # 4 What is the different between these type of software: open source preparatory public domain Shareware Private software Commercial software

19 Thank You!