From: "sauls" <sauls AT nospam DOT subdimension DOT com>
Newsgroups: comp.os.msdos.djgpp
Subject: Real Mode Callbacks: The Return
Date: Sat, 2 Dec 2000 02:35:35 -0600
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To: djgpp AT delorie DOT com
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Reply-To: djgpp AT delorie DOT com

I thought I got a grasp of what was going on with
__djgpp_allocate_real_mode_callback, so I tried to write some code...

int main()
{
 __dpmi_raddr MouseCallback;

 if(__dpmi_allocate_real_mode_callback(&MouseFunction, &r, &MouseCallback))
  abort();

 int Mask = 0x7F;
 r.x.es = MouseCallback.segment;
 r.x.dx = MouseCallback.offset16;
 r.x.ax = 0x000c;
 r.x.cx = Mask;
 __dpmi_int(0x33, &r);
}

with a suitible loop at the end to waste time. But when I tried to run it,
it crashed and burned, with either a GPF, or a complete hard freeze. I seem
to not be understanding the concept. If someone could show me where I went
wrong.... please?

Oh yes, and I already realize that what I am doing could be done with the
__go32_allocare_real_mode_callback function. This is more for the
educational experience, than anything else.

Thanks.