From:	Damian Yerrick <Bullcr_pd_yerrick AT hotmail DOT comRemoveBullcr_p>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: 32 Bit Dos Programming with Allegro and djgpp .....I need your expert advice
Organization:	Pin Eight Software http://pineight.8m.com/
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NNTP-Posting-Date:	Tue, 19 Sep 2000 22:33:21 GMT
Distribution:	world
Date:	Tue, 19 Sep 2000 22:33:21 GMT
To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp
Reply-To:	djgpp AT delorie DOT com

On Tue, 19 Sep 2000 10:45:18 EDT, Vicmiller1 AT aol DOT com wrote:

>Hello ...from Victor L. Miller
>
>I have been using the Allegro graphics library with the DJGPP for
>over a year and it is excellent...... I find the bitmap rotation
>and palette / true color modes excellent.... I have made some
>larger scientific visualization programs with Allegro / DJGPP
>
>Now,  the company I work for has switched to WindowsNT

So switch the company you work for :-)
Also switch your ISP if you can.
  http://anti-aol.org/

Now, to steer it back on topic...

>and the first thing I realized is that WindowsNT does NOT run DPMI
>(Protected Mode) programs

Wrong.  NT runs DPMI programs, but its VDM has a hard time
virtualizing certain operations through HAL.

>or what I think of as 32-bit DOS Extended
>programs that do their own 32-bit memory addressing.

NT denies all DPMI map_physical_memory requests because if it
didn't, a misbehaving DOS program could map the Windows kernel
into its address space.

>Now,  what I discovered is that WindowsNT runs "standard" 16-bit
>executables (exe's) fine but it won't run 32-bit DOS applications
>(which is what DJGPP C programs are of course).  Now I have also
>confirmed that it is nothing unique to Allegro /  DJGPP but no
>32-bit DOS programs run.

Have you tried running a text-mode DJGPP hello.exe?  Or gcc itself?

>Now,  I would like your thoughts / confirmation of what I am
>saying and what have people done to create and run 32-bit DOS
>programs on WindowsNT.

gcc works fine on NT 4.03.

>Does Allegro / DJGPP (and I am also using RHIDE environment)
>have NT versions, etc ?

MinGW is a minimalist GNU environment (just enough to get GCC working)
that uses msvcrt.dll as its libc.
  http://www.mingw.org/
Allegro 3.9.x also works on MinGW; it uses DirectX there.

>What about RHIDE ?

RHIDE is a DOS-based IDE that works fine on NT.  The 1.4.7.x series
maintained by Andris Pavenis also supports the mouse.

>Has anyone come up with something that you can put on your NT
>system which will allow 32-bit DOS programs to run in NT ?

The latest service pack?

>I am concerned because even though Win98 still runs / supports
>32-bit DOS stuff I think that eventually windows will be Windows
>2000 (Windows Millenium is just a bloated version of Win 98) which
>is really WindowsNT under the hood, and does that signal the end
>of 32-bit DOS forever ?

Microsoft seems to have no interest in fixing show-stopper bugs (such
as the limit of two nested DPMI programs in Windows 2000) in NT's DOS
emulator (NTVDM).

>I would appreciated your expert comments ,advice, and knowledge
>related to this subject.

Please turn on word wrapping (around 70 characters).

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