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Chapter 9. Installing and Configuring Ap... > DOS Application Compatibility Settin...

DOS Application Compatibility Settings

Previously, the AUTOEXEC.BAT and CONFIG.SYS files—normally found in the root directory on your boot drive—were used to initialize the DOS environment. Today, the venerable AUTOEXEC.BAT file is replaced by AUTOEXEC.NT and the CONFIG.SYS file by a new configuration file CONFIG.NT, both of which are located in your \Windows\system32 directory. Unless a different pair of startup files are specified in an application's .PIF (Program Information File), the AUTOEXEC.NT and CONFIG.NT files will be used to initialize the MS-DOS environment.

TIP

When a DOS program is executed by clicking on the application's .PIF icon, the pif settings take effect and control the application's DOS environment. If, however, a DOS application is executed from the command line (typing a command in a DOS box or using the RUN command from the start menu), settings in the .PIF file are not observed at all.

To ensure that the application's environmental settings are observed, instead of running the application directly from a command line entry—that is, instead of entering appname—enter the name of the .PIF file—for example, enter appname.pif—to launch the program.



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