• Create BookmarkCreate Bookmark
  • Create Note or TagCreate Note or Tag
  • PrintPrint
Share this Page URL
Help

Chapter 26. Understanding Windows NT Arc... > Reviewing User Mode Environment Subs...

Reviewing User Mode Environment Subsystems

The User mode is the home for applications you run in Windows NT. This refers not only to the applications you install in Windows NT, but also the applications that come with the system, such as Briefcase, Explorer, and Pint, just to name a few.

MS-DOS Subsystem

Windows NT provides a specific environment for each MS-DOS application. This environment is known as an NT Virtual DOS Machine (NTVDM). The NTVDM simulates a 486 processor for MS-DOS applications. This simulation also occurs on RISC platforms. The NTVDM operates as a single process under Windows NT. If you run more than one DOS application, multiple NTVDM processes are launched because each DOS application runs in its own NTVDM, and each NTVDM runs in its own memory space. Instructions for the NTVDM code are stored in the file Ntvdm.exe.


PREVIEW

                                                                          

Not a subscriber?

Start A Free Trial


  
  • Creative Edge
  • Create BookmarkCreate Bookmark
  • Create Note or TagCreate Note or Tag
  • PrintPrint