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comp.os.msdos.programmer FAQ part 4/5
Section - - How can my program tell if it's running under Windows?

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Top Document: comp.os.msdos.programmer FAQ part 4/5
Previous Document: - How can a batch file tell whether it's being run in a DOS box under Windows?
Next Document: - How can a program tell whether ANSI.SYS is installed?
See reader questions & answers on this topic! - Help others by sharing your knowledge
Date: 8 Feb 2002 20:37:06 -0400

 Execute INT 2F AX=4680. If AX returns 0, you're in Windows real mode or
 standard mode (or under the DOS shell). Otherwise, call INT 2F AX=1600.
 If AL returns something other than 0 or 80, you're in Windows 386
 enhanced mode. See PC Magazine 24 Nov 1992 (xi:20) pages 492-493.

 For more information, see PC Magazine 26 May 1992 (xi:10) pages 345-346.
 A program, WINMODE, is available as part of:
 <http://www.simtel.net/pub/pd/48500.html>
 <ftp://garbo.uwasa.fi/pc/pcmagvol/>

 PC Magazine 29 March 1994 (xiii: 6) pages 312 and 320 published a new
 program, WINVER. This would be in:
 <http://www.simtel.net/pub/pd/48540.html>
 <ftp://garbo.uwasa.fi/pc/pcmagvol/>

User Contributions:

1
Ben in Seattle
⚠
Jun 2, 2026 @ 4:16 pm
Another solution is to use a parallel port loopback plug. It makes the PC think there is a printer attached. The benefit of this is it doesn't require anticipating the problem with ANSI.SYS escape sequences nor does it make you wait half an hour for the "Abort, Retry, Ignore?" prompt, as some versions of DOS do.

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Top Document: comp.os.msdos.programmer FAQ part 4/5
Previous Document: - How can a batch file tell whether it's being run in a DOS box under Windows?
Next Document: - How can a program tell whether ANSI.SYS is installed?

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Last Update March 27 2014 @ 02:11 PM