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always stick to correct vga memory wrapping

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Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@3090
This commit is contained in:
Sebastian Strohhäcker 2008-02-02 20:47:24 +00:00
parent 8a10bb8f0d
commit 827bb02217
1 changed files with 5 additions and 6 deletions
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11
src/hardware/vga_memory.cpp
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@ -16,7 +16,7 @@
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/* $Id: vga_memory.cpp,v 1.47 2008-01-12 17:37:48 c2woody Exp $ */
/* $Id: vga_memory.cpp,v 1.48 2008-02-02 20:47:24 c2woody Exp $ */
#include <stdlib.h>
#include <string.h>
@ -29,16 +29,15 @@
#include "setup.h"
/* #ifndef C_VGARAM_CHECKED
#ifndef C_VGARAM_CHECKED
#define C_VGARAM_CHECKED 1
#endif */
#endif
#if C_VGARAM_CHECKED
// Checked linear offset
#define CHECKED(v) ((v)&(vga.vmemwrap-1))
// Checked planar offset (latched access)
#define CHECKED2(v) ((v)&((vga.vmemwrap>>2)-1))
// Checked planar offset (latched access)
#else
#define CHECKED(v) (v)
#define CHECKED2(v) (v)
@ -425,8 +424,8 @@ public:
pixels.d&=vga.config.full_not_map_mask;
pixels.d|=(data & vga.config.full_map_mask);
((Bit32u*)vga.mem.linear)[addr]=pixels.d;
if(vga.config.compatible_chain4)
((Bit32u*)vga.mem.linear)[CHECKED2(addr+64*1024)]=pixels.d;
// if(vga.config.compatible_chain4)
// ((Bit32u*)vga.mem.linear)[CHECKED2(addr+64*1024)]=pixels.d;
}
public:
VGA_UnchainedVGA_Handler() {