DOCUMENT:Q93499  20-JUL-1993  [W_NT]
TITLE   :Memory Available to MS-DOS Applications with Windows NT
PRODUCT :Windows NT
PROD/VER:3.10
OPER/SYS:WINDOWS
KEYWORDS:

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The information in this article applies to:

 - Microsoft Windows NT operating system version 3.1
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Summary:

This article describes the amount and type of memory available to
MS-DOS-based applications running under Windows NT.

More Information:

There is approximately 620K of conventional memory available at all
times to MS-DOS-based applications. Device drivers do not impact
MS-DOS memory in the same way they did with OS/2 1.x (with the
exception of small stubs that map through to the underlying Win32/NT
subsystem).

The memory for MS-DOS applications comes from the Windows NT virtual
page pool. There is practically no limit; however, there is the
typical size-versus-speed tradeoff associated with virtual storage.
This memory is user-selectable: either EMS (LIM 4.0), XMS (provided by
MS-DOS 5 HIMEM.SYS), or DPMI version 0.9.

Additional reference words: 3.10

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Copyright Microsoft Corporation 1993.