Xref:	news2.mv.net comp.os.msdos.djgpp:4149
From:	jlouwere AT galaxy DOT csc DOT calpoly DOT edu (Jan Louwerens)
Newsgroups:	comp.os.msdos.djgpp
Subject:	What's wrong with this?
Date:	22 May 1996 19:12:51 GMT
Organization:	Cal Poly Computer Science Dept.
Lines:	25
Message-ID:	<4nvovj$42q@waldorf.csc.calpoly.edu>
NNTP-Posting-User:	jlouwere AT galaxy DOT csc DOT calpoly DOT edu
To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp

I have a class called VirtualScreen that uses a BYTE Screen[200][320] array
(typedef unsigned char BYTE) and another class Lens that has an array BYTE
Buffer[32][32]. When I use VirtualScreen *VScreen = new VirtualScreen(); and
Lens *L = new Lens(); it places the Buffer array right in the middle of the
Screen array. I know this because I've filled Buffer with certain values, and
watched it on the screen when I flip Screen to the VGA screen. I use _djgpp_nearpointer_enable(), but not until after both of the 'new's. If I use BYTE
Buffer[64][64] or BYTE Buffer[128][128] it gives me a runtime error.
(General protection fault, I believe, or maybe page fault.). If I use BYTE
Buffer[256][256] it seems to run ok, but it is a waste of memory since I'm
only using 32*32 of the 256*256 values. Does anybody know what is going on
here? Any help would be greatly appreciated. Thanks.

                                           _____  ___________
                                          |\    \|\          \
  _____  _____                            | \    \ \     _____\
 |\    \|\    \                           \  \    \ \    \    |
 | \    \ \    \                         _____\    \ \    \______
 \  \    \ \    \                       |\          \ \          \
  \  \    \ \    \                      | \_____     \ \     _____\
 _____\    \ \    \_____                \ |     \     \ \    \    |
|\          \ \         \                \|______\     \ \    \___|
| \__________\ \_________\                 |\           \ \    \
\ |          | |         |                 | \___________\ \____\
 \|__________|\|_________|                 \ |           | |    |
                                            \|___________|\|____|

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