From: Matthew Kruk <mrkuk AT netcom DOT ca>
Newsgroups: comp.os.msdos.programmer,comp.os.msdos.djgpp
Subject: Re: InDOS Flag
Date: Mon, 21 Apr 1997 00:10:07 -0700
Organization: M & M Systems
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To: djgpp AT delorie DOT com
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firewind wrote:
> ...

Because the command processor uses DOS functions for command-line input,
the InDOS flag is set while DOS waits for characters.

Try also checking undocumented interrupt 28h which is called by the
console input routines while they are waiting.  This is the DOS Idle
(DOSOK) interrupt.