Newsgroups: comp.os.msdos.djgpp
From: Butler Owen scm2211 <s9708172 AT tiger DOT vut DOT edu DOT au>
Subject: far pointers using djgpp
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Message-ID: <Pine.SOL.3.95.980617000723.17603A-100000@tiger.vut.edu.au>
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Organization: Victoria University of Technology
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Date: Tue, 16 Jun 1998 14:12:23 GMT
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To: djgpp AT delorie DOT com
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Hello,

I would like to create a pointer to my VGA cards memory.  I know this
starts at 0xA000,0000 

in another compiler I would use:

char far *screen= (char far *) MK_FP(0xa000,0);

problems arise:
1. djgpp does not support the "far" keyword
2. the implementation of "dos.h" that comes with djgpp does not contain
MK_FP()

if I try this:

char * screen = (char *) 0xa0000000;

it compiles fine, then crashes at the point I try and set anything through
this pointer.

Any suggestions?

Thanks.

Owen Butler