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Chapter 13. The MS-DOS Environment Under... > Configuring the MS-DOS Environment

Configuring the MS-DOS Environment

To maintain compatibility with as many old DOS programs as possible, NTVDM can be configured in several ways to mimic an older environment. You can configure NTVDM's memory and window options through a properties dialog box, and you can configure the virtual DOS environment itself through configuration files that mimic the old CONFIG.SYS and AUTOEXEC.BAT files. Here is how the default configuration works:

  • By default, NTVDM gives the MS-DOS program as much regular and DMPI (DOS Protected Mode Interface) memory as it asks for. No Extended (XMS) or Expanded (EMS) memory is available.

  • NTVDM reads configuration options from \windows\system32\config.nt and executes the batch file \windows\system32\autoexec.nt before running the program. These files are installed along with Windows and contain important default settings that permit the use of high memory, networking, and emulated Sound Blaster sound hardware.


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