Message-Id: <m0xBfUB-000S1mC@inti.edu.ar>
Comments: Authenticated sender is <salvador AT natacha DOT inti DOT edu DOT ar>
From: "Salvador Eduardo Tropea (SET)" <salvador AT inti DOT edu DOT ar>
Organization: INTI
To: Eli Zaretskii <eliz AT is DOT elta DOT co DOT il>, djgpp AT delorie DOT com,
        spector AT EnchantedLearning DOT com
Date: Thu, 18 Sep 1997 15:40:17 +0000
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Subject: Re: DJGPP, interprocess communication, and DPMI
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Eli Zaretskii <eliz AT is DOT elta DOT co DOT il> replied to Mitchell Spector <spector AT EnchantedLearning DOT com>
> On Wed, 17 Sep 1997, Mitchell Spector wrote:
> 
> > Can a DJGPP program running in a DOS box under Windows 95
> > communicate with another currently-running program (either
> > another DJGPP program in a different DOS box or a regular
> > Win32 app)?
> 
> One way that's simple to implement is to use the Windows clipboard.
> A bunch of functions of Interrupt 2Fh let DOS programs get and put
> text from and to the Windows clipboard.  Look in Ralf Brown's
> Interrupt List, under W-2F1700 (WINOLDAP) and thereabouts.
> 
> For example, the DJGPP port of Emacs uses this interface to support
> the clipboard cut/paste operation, and as a consequence, you can move
> text between two instances of Emacs that run on the same machine.
> 
> This method uses DOS memory, so it's inherently limited to the amount
> of free DOS memory your program has (usually, at least 500K should be
> available, but your mileage may vary).
> 
> The only other way is to write a VxD, I think.  But I'm no expert in
> the ways of tweaking Windows to do what you need, so don't take this 
> as the definitive opinion.
 
At least in my system the Windows clipboard seems to be slower than a virtual 
disk or even the HD with enough cache.
I don't know why but the Win 3.1 clipboard works very slow (I tried coping 
300Kb from write).
I think one solution could be a real mode TSR loaded before windows.

SET 
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