Disk Operating System

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Disk Operating System : 

Disk Operating System 2

Disk Operating System (DOS) : 

Disk Operating System (DOS) The Disk Operating System (DOS) set standards for Windows operating systems to follow. The command line is used to enter commands and to open programs. No multitasking or multiprocessor support.

DOS Core Files : 

DOS Core Files

DOS Commands : 

DOS Commands Internal commands are commands contained within the command.com file. External commands are located in the DOS directory.

Internal Commands : 

Internal Commands

External Commands : 

External Commands

DOS System Boot Disk : 

DOS System Boot Disk A DOS system boot disk contains the necessary files needed to boot the computer. Booting refers to starting the computer and loading the OS. To create a DOS boot disk, the format a: /s command is used.

Naming DOS Files : 

Naming DOS Files Eight point three (8.3) naming convention. Eight-character or less filename, a period (dot), and a three-character extension. Examples: config.sys autoexec.bat myfile.txt

Common File Extensions : 

Common File Extensions

Unacceptable Filename Characters : 

Unacceptable Filename Characters A period can only be used between the filename and extension. | + = > < ? : [ ]

Warm and Cold Boot : 

Warm and Cold Boot Warm boot initiated by [Ctrl] [Alt] [Del]. Cold boot initiated by turning the computer on with the switch.

Config.sys : 

Config.sys Used to load device drivers and to configure, disable, or enable OS features, such as number of files that can be opened. Used in new operating systems to support legacy software applications.

Config.sys Commands : 

Config.sys Commands

Autoexec.bat Commands : 

Autoexec.bat Commands

Autoexec.bat : 

Autoexec.bat A text file used to load and run programs at startup. Required for legacy programs.

Review : 

Review What are the names of the three core DOS files? io.sys msdos.sys command.com

Review : 

Review Which of the following commands is used to create a DOS boot disk? chkdsk a: /s chkdsk a: /DOS format a: /s format a: /DOS 

Review : 

Review Which file is used to load device drivers and to configure, disable, or enable OS features, such as the number of files that can be opened? autoexec.bat config.bat autoexec.sys config.sys 

Review : 

Review What are some limitations of DOS? 8.3 character-naming convention. Command line only. No multitasking or multiprocessor support.