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MS Windows - Operating Modes
DocumentID: 653055
Revision Date: 29-Feb-96 8:29:20 PM

The information in this document applies to:
WordPerfect® 5.1 for DOS

Problem

Solutions: MS Windows 3.0 can be run in three different modes: Real mode, Standard mode, or 386 Enhanced mode. The mode that is used depends on the equipment and the software applications the user wants to operate while running in the Windows environment. The three operating modes for Windows are defined as follows:

      Real mode is the operating mode that provides maximum compatibility with previous versions of Windows applications (2.x versions). If you want to run applications from earlier versions of Windows, unless they are upgraded versions that run with Windows 3.0, the user should start Windows in Real mode. Real mode is also the only mode available for computers with less than 1M of memory (640K conventional, 256 extended).

      Standard mode is the normal operating mode for running Windows. This mode provides access to extended memory and also allows switching among non-Windows applications. With access to extended memory, more Windows applications can run at the same time. In addition, applications run faster on systems that have more memory.

      In order for Windows to run in Standard mode, the computer must have at least 256K of unused conventional memory and at least 256K of available extended memory.

      386 Enhanced mode provides access to the virtual memory capabilities of the Intel 80386 processor. Virtual memory capabilities let Windows applications use more memory than is physically available. 386 Enhanced mode also allows for the multi-tasking of non-Windows applications. Enhanced mode also gives the user greater control over non-Windows applications. For example, instead of running non-Windows applications full-screen, most of them can be run in Windows, taking full advantage of the graphical environment.

      In order for Windows to run in 386 Enhanced mode, the computer must have at least 200K of unused conventional memory and at least 1024K of available extended memory.

Windows determines which operating mode your system will use when starting up Windows using the standard procedure outlined in Chapter 1 of the Windows manual.

Answer:

Details:


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