The information in this article applies to:
- Microsoft Windows NT operating system, version 3.1
- Microsoft Windows NT Advanced Server, version 3.1
Windows NT recognizes a file as an MS-DOS - based application and
gives it to the MS-DOS subsystem if the file meets the following
criteria:
- It is a .COM file.
- It is an .EXE file and has no extended header (that is, no NE
signature).
- It is an .EXE file and has an extended header with an LE signature.
- It is an .EXE file, has an NE signature, but there is no DOSCALLS.DLL
in the import table
- It is an .EXE file, has an NE signature, but no special signatures,
such as:
- ExeType in the extended header equal to 5 (DOS4.0)
- No import table entry
- "mode EXE$" signature in the extended header (Borland application)
- "16STUB" signature in the extended header (Borland application)
- "Phar Lap Software, Inc." signature in the extended header
(Phar Lap extended header)
- "Copyright (C) Rational Systems Inc." signature in the
extended header (rational extended header)
- Lotus 1-2-3 preloader signature of (certain version of
123.EXE)
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