From: Russ Magee <rmageeNO_SPAM AT home DOT com>
Newsgroups: comp.os.msdos.programmer,comp.os.msdos.djgpp
Subject: Porting DJGPP DPMI Apps-->Borland C++5.x
Date: Thu, 07 Dec 2000 17:38:01 -0700
Organization: Mount Royal College
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To: djgpp AT delorie DOT com
DJ-Gateway: from newsgroup comp.os.msdos.djgpp
Reply-To: djgpp AT delorie DOT com

Hi all,

I'm an Instructional Assistant at my local college who's been asked by
a prof to evaluate porting a curriculum in systems programming from
DJGPP to Borland C++ 5.xx (mostly because of better integration with
Borland's TASM and TDEBUG).

All the code examples for assignments use DJGPP with the DPMI interface,
and we're wondering if it's feasible to port these to Borland C. (Students
will only have to compile DOS apps, no Win32 stuff.)

Is this going to be a problem? My (limited) understanding is that DPMI is
just an API for accessing DOS calls from protected mode. What changes,
visible at the C-language level, will typically have to be made to make
a DJGPP/DPMI app compile in Borland C?

Specifically, setting up registers, pointer declarations, data struct size
limits...

(This didn't look to be covered in the FAQ; if it was, my apologies for
missing it. I'm a 68000 hack, this x86 stuff is pretty foreign to me.)

Thanks,
-Russ