Path: utzoo!utgpu!news-server.csri.toronto.edu!clyde.concordia.ca!mcgill-vision!snorkelwacker!usc!sdd.hp.com!zaphod.mps.ohio-state.edu!samsung!munnari.oz.au!uhccux!julian
From: julian@uhccux.uhcc.Hawaii.Edu (Julian Cowley)
Newsgroups: comp.lang.c
Subject: Microsoft C far pointer dereferencing
Message-ID: <9031@uhccux.uhcc.Hawaii.Edu>
Date: 16 Aug 90 04:33:29 GMT
Organization: University of Hawaii at Manoa
Lines: 20

Ok, I've read the articles concerning the use of (void far *) in
Microsoft C, but I still can't figure out why the pointer in
following piece of code won't dereference.  What I'm trying to
do is access the MCGA screen at A000:0000, in case there is a
better way to do this...

PutPixel (int x, int y, unsigned char c)
{
  unsigned char far *mem;

  FP_SEG (mem) = 0xa000;
  FP_OFF (mem) = 320 * y + x;

  *mem = c;		/* <-- this line gives a run-time error */
}

julian cowley
university of hawaii at manoa
julian@uhccux.uhcc.hawaii.edu
julian@uhccux.bitnet