Article ID: 134400 - View products that this article applies to.
This article was previously published under Q134400
You can use MS-DOS mode in Windows to run MS-DOS-based programs that require exclusive use of all your computer's resources. This article contains tips on how to configure MS-DOS mode.
Windows normally uses MS-DOS mode when it detects that a program requires it. If the program you want to run is not recognized by Windows, you receive an error message stating that the program cannot be run within Windows. You can then manually configure the program to use MS-DOS mode.
Once you configure a program to use MS-DOS mode, double-clicking the program's icon causes Windows to switch to MS-DOS mode automatically.
Before switching to this mode, Windows ends all running tasks, loads a real-mode copy of MS-DOS, and loads customized Autoexec.bat and Config.sys files if appropriate. When MS-DOS mode loads, you see the following message:
Windows 95/98 is now starting your msdos based program.When you exit MS-DOS mode, Windows restarts.
Configuring MS-DOS ModeTo configure an MS-DOS-based program to run in MS-DOS mode, you should have a shortcut icon for the program. If there is no shortcut icon for the program, use the right mouse button to click the program's icon, and then click Create Shortcut on the menu that appears. Once there is a shortcut icon for the program, follow these steps to configure the program to use MS-DOS mode:
Specifying a New MS-DOS configurationTo change the configuration to suit the program, follow these steps:
For additional information, please see the following article in the Microsoft Knowledge Base:
TITLE: Optimizing Your Use Of Upper Memory Blocks
Default Changes to Configuration FilesWhen you start MS-DOS mode, new Config.sys and Autoexec.bat files are created. The following lines are added automatically by Windows:
The first line of the Config.sys file:
The last lines of the Autoexec.bat file:
The line "DOS=SINGLE" causes your computer to start in MS-DOS mode. The "Call" line starts the MS-DOS-based program. The "WIN.COM /WX" command restarts Windows with the normal configuration.
For additional information about the process that occurs when you restart your computer in MS-DOS mode, please see the following article in the Microsoft Knowledge Base:
TITLE : Description of Restarting Computer in MS-DOS Mode
For additional information about games that require or perform better in MS-DOS mode, please see the following articles in the Microsoft Knowledge Base:
TITLE : Games (A-H) Requiring or Performing Better in MS-DOS Mode
TITLE : Games (I-Q) Requiring or Performing Better in MS-DOS Mode
TITLE : Games (R-Z) Requiring or Performing Better in MS-DOS Mode
Microsoft Windows 95 "Resource Kit," Chapter 22, Application Support