From:	Robert Hoehne <Robert DOT Hoehne AT Mathematik DOT tu-chemnitz DOT de>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: The case of Text and GU interfaces and OpenDOS: Where to send bug reports?
Date:	Wed, 29 Jan 1997 12:06:49 +0100
Organization:	TU Chemnitz-Zwickau
Lines:	31
Message-ID:	<32EF2F49.106D@Mathematik.tu-chemnitz.de>
References:	<01bc0dbc$b9f6c020$3f805380 AT maan-m DOT -hamze>
NNTP-Posting-Host:	env.hrz.tu-chemnitz.de
Mime-Version:	1.0
To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp

Maan M. Hamze wrote:
> 
> You can NOT access the Task Manager Menu (the one you get into through
> CNTRL-ESC) when you are in the program.  In other
> words, you can NOT access the Task Manager menu through the text user
> interface (as in RHIDE) or the GUI (as in 3ds3 R3 for example).
> You have to shell into DOS from RHIDE (or 3ds3 R3) then start another task
> through CNTRL-ESC.
> The problem does not appear through the program Edit that comes with
> OpenDOS.  You can access the menu through it.

Because I don't know anything about OpenDOS (not time for testing) I
cannot
say it absolutely, but it may be the following:

OpenDOS hooks an function (or interrupt) which is called (as example) by
the keyboard interrupt when waiting for a keypress to tell the OS, that
the app is currenly idle. But (I can say it only for RHIDE) RHIDE does
not call the keyboard interrupt and does not wait for a keypress (it
polls the keyboard until a key was pressed).

But RHIDE calls the DPMI function (__dpmi_yield()) when it is idle.

Robert 
-- 
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* Robert Hoehne, Fakultaet fuer Mathematik, TU-Chemnitz-Zwickau *
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