Xref: news2.mv.net comp.os.msdos.djgpp:8080
From: John Sabean <docmani AT eng DOT umd DOT edu>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: Telnet client with DJGPP? (Under Win95)
Date: Fri, 30 Aug 1996 14:03:07 -0400
Organization: University of Maryland, College Park
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Message-ID: <32272CDB.167EB0E7@eng.umd.edu>
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To: djgpp AT delorie DOT com
DJ-Gateway: from newsgroup comp.os.msdos.djgpp

Mohan Khurana wrote:
> 
> Samuel Vincent <svincent AT cs DOT sonoma DOT edu> wrote:
> 
> >It appears to me that there is a win95 program (probably console) along
> >with 2 DLL's and one VXD.  I believe the VXD, DLL's and the win95 program
> >probably setup an interrupt to accept input which is routed through the
> >tcp/ip stack and put output in a buffer accessible by the interrupt.
> >This interrupt is, of course, accessible to any dos program.  Therefore a
> >DJGPP-compiled program has no more difficulty using it than it would
> >reading from the hard drive.
> 
> >If my memory serves correctly another company made this interface and Id
> >software is only licensing their technology.
> 
> >-Sam
> 
> I'd like to see some source.  I hope someone will eventually find out
> exactly how to do it and maybe post it on this newsgroup.
> 
> Was all of Quake compiled with DJGPP?

I've been looking at information for the past couple of days. It
seems a decent way to get a DOS program to interface with windows
is through use of a VXD. It looks like windows does in fact have
an interrupt (2F I believe) which allows a DOS program to access
windows VXDs. So, it looks like what they did was, as you said,
wrote or licenced the software to do this. 

I looked on www.mpath.com (MPATH being the guys who wrote the
stuff for Quake) There is no mention of the software anywhere on
their site (although I'm sure they'd be happy to charge you a heafty
amount to use it, if you asked nicely).

The other option would be to write our own VXD with a PD library
for DJGPP. Unfortunately, it seems that road requires Visual C++
4.0 or 4.2 AND the Microsoft DDK (Device Driver Development Kit).
To get the kit, you need to be a Level 2 MS developer. The price
tag is something like $500. So, $100 for the compiler + $500 for
the DDK = I don't have enough money to do this :)


Neither of these options seems too happy, as I am your typical 
poor college student. There is little to no public domain information
on VXDs, as is typical with Microsoft. It would be nice if you could
program VXDs with gnu-win32, however that seems unlikely at this point.

Any other thoughts?