Date: Mon, 13 Mar 1995 08:13:30 -0500
From: dj (DJ Delorie)
To: A DOT APPLEYARD AT fs2 DOT mt DOT umist DOT ac DOT uk
Cc: DJGPP AT SUN DOT SOE DOT CLARKSON DOT EDU
Subject: Re: Running djgpp programs under Windows?


>   It seems to me that Gnu C's paged store access system works thus (please
> correct me if I am wrong):-
>   All store references are caught by a set of `Gnu C Store Access Interrupt
> Routines' (hereinafter GCSAIR's) (currently in GO32), which translate the

This is done by the 80386 hardware itself.  It is not software.

> store reference into the actual address. If so, what would need to be done to
> make a Gnu C compiled (*.EXE) program run in real mode without paging?:

Convince Intel to make a 80386 with a 32-bit real mode.  The Linux
project has a gcc that can produce 16-bit code for PCs, but that
doesn't mean it can link your Microsoft libraries.  They use it
primarily for boot code.

>   This also seems to relate to running under Windows, as I was once told that
> "Windows can't call djgpp programs directly, as djgpp and Windows use the same
> paging system" or something like that: please correct me if I am wrong. If

No, djgpp uses Window's memory management system.  The real problems
are (1) "far" calls, and (2) linking in Windows DLLs and libraries.