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optionally turn off vesa linear framebuffer for some buggy games

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Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@3092
This commit is contained in:
Sebastian Strohhäcker 2008-02-03 20:43:14 +00:00
parent 02579c09f2
commit 09622a48af
4 changed files with 21 additions and 9 deletions
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3
src/ints/int10.h
View file

@ -16,7 +16,7 @@
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/* $Id: int10.h,v 1.33 2008-02-03 12:19:35 c2woody Exp $ */
/* $Id: int10.h,v 1.34 2008-02-03 20:43:14 c2woody Exp $ */
#include "vga.h"
@ -138,6 +138,7 @@ typedef struct {
Bitu used;
} rom;
Bitu vesa_setmode;
bool vesa_nolfb;
} Int10Data;
extern Int10Data int10;

3
src/ints/int10_modes.cpp
View file

@ -16,7 +16,7 @@
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/* $Id: int10_modes.cpp,v 1.76 2008-02-03 12:19:35 c2woody Exp $ */
/* $Id: int10_modes.cpp,v 1.77 2008-02-03 20:43:14 c2woody Exp $ */
#include <string.h>
@ -572,6 +572,7 @@ bool INT10_SetVideoMode_OTHER(Bitu mode,bool clearmem) {
bool INT10_SetVideoMode(Bitu mode) {
bool clearmem=true;Bitu i;
if (mode>=0x100) {
if ((mode & 0x4000) && int10.vesa_nolfb) return false;
if (mode & 0x8000) clearmem=false;
mode&=0xfff;
}

16
src/ints/int10_vesa.cpp
View file

@ -16,7 +16,7 @@
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/* $Id: int10_vesa.cpp,v 1.33 2008-02-03 12:19:35 c2woody Exp $ */
/* $Id: int10_vesa.cpp,v 1.34 2008-02-03 20:43:14 c2woody Exp $ */
#include <string.h>
#include <stddef.h>
@ -164,7 +164,8 @@ foundit:
var_write(&minfo.NumberOfPlanes,0x1);
var_write(&minfo.BitsPerPixel,8);
var_write(&minfo.MemoryModel,4); //packed pixel
modeAttributes = 0x9b; // Color, graphics, linear buffer
modeAttributes = 0x1b; // Color, graphics
if (!int10.vesa_nolfb) modeAttributes |= 0x80; // linear framebuffer
break;
case M_LIN15:
pageSize = mblock->sheight * mblock->swidth*2;
@ -181,7 +182,8 @@ foundit:
var_write(&minfo.BlueMaskPos,0);
var_write(&minfo.ReservedMaskSize,0x01);
var_write(&minfo.ReservedMaskPos,0x0f);
modeAttributes = 0x9b; // Color, graphics, linear buffer
modeAttributes = 0x1b; // Color, graphics
if (!int10.vesa_nolfb) modeAttributes |= 0x80; // linear framebuffer
break;
case M_LIN16:
pageSize = mblock->sheight * mblock->swidth*2;
@ -196,7 +198,8 @@ foundit:
var_write(&minfo.GreenMaskPos,5);
var_write(&minfo.BlueMaskSize,5);
var_write(&minfo.BlueMaskPos,0);
modeAttributes = 0x9b; // Color, graphics, linear buffer
modeAttributes = 0x1b; // Color, graphics
if (!int10.vesa_nolfb) modeAttributes |= 0x80; // linear framebuffer
break;
case M_LIN32:
pageSize = mblock->sheight * mblock->swidth*4;
@ -213,7 +216,8 @@ foundit:
var_write(&minfo.BlueMaskPos,0x0);
var_write(&minfo.ReservedMaskSize,0x8);
var_write(&minfo.ReservedMaskPos,0x18);
modeAttributes = 0x9b; // Color, graphics, linear buffer
modeAttributes = 0x1b; // Color, graphics
if (!int10.vesa_nolfb) modeAttributes |= 0x80; // linear framebuffer
break;
/* case M_TEXT:
pageSize = mblock->sheight/8 * mblock->swidth*2/8;
@ -258,7 +262,7 @@ foundit:
var_write(&minfo.Reserved_page,0x1);
var_write(&minfo.XCharSize,mblock->cwidth);
var_write(&minfo.YCharSize,mblock->cheight);
var_write(&minfo.PhysBasePtr,S3_LFB_BASE);
if (!int10.vesa_nolfb) var_write(&minfo.PhysBasePtr,S3_LFB_BASE);
MEM_BlockWrite(buf,&minfo,sizeof(MODE_INFO));
return 0x00;