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add special int10 scanline modifying function (hal, fixes some mz700 emulator and others)

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Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@3463
This commit is contained in:
Sebastian Strohhäcker 2009-09-06 19:25:34 +00:00
parent 9cab1737b8
commit 75d7ee65e9
5 changed files with 104 additions and 29 deletions
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43
src/ints/int10.cpp
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@ -16,7 +16,7 @@
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/* $Id: int10.cpp,v 1.55 2009-04-11 07:58:39 qbix79 Exp $ */
/* $Id: int10.cpp,v 1.56 2009-09-06 19:25:34 c2woody Exp $ */
#include "dosbox.h"
#include "mem.h"
@ -329,11 +329,42 @@ graphics_chars:
case 0x20: /* Set alternate printscreen */
break;
case 0x30: /* Select vertical resolution */
if (!IS_VGA_ARCH) break;
LOG(LOG_INT10,LOG_ERROR)("Function 12:Call %2X not handled",reg_bl);
if (reg_al>2) reg_al=0; //invalid subfunction
else reg_al=0x12; //fake a success call
break;
{
if (!IS_VGA_ARCH) break;
LOG(LOG_INT10,LOG_WARN)("Function 12:Call %2X (select vertical resolution)",reg_bl);
if (svgaCard != SVGA_None) {
if (reg_al > 2) {
reg_al=0; // invalid subfunction
break;
}
}
Bit8u modeset_ctl = real_readb(BIOSMEM_SEG,BIOSMEM_MODESET_CTL);
Bit8u video_switches = real_readb(BIOSMEM_SEG,BIOSMEM_SWITCHES)&0xf0;
switch(reg_al) {
case 0: // 200
modeset_ctl &= 0xef;
modeset_ctl |= 0x80;
video_switches |= 8; // ega normal/cga emulation
break;
case 1: // 350
modeset_ctl &= 0x6f;
video_switches |= 9; // ega enhanced
break;
case 2: // 400
modeset_ctl &= 0x6f;
modeset_ctl |= 0x10; // use 400-line mode at next mode set
video_switches |= 9; // ega enhanced
break;
default:
modeset_ctl &= 0xef;
video_switches |= 8; // ega normal/cga emulation
break;
}
real_writeb(BIOSMEM_SEG,BIOSMEM_MODESET_CTL,modeset_ctl);
real_writeb(BIOSMEM_SEG,BIOSMEM_SWITCHES,video_switches);
reg_al=0x12; // success
break;
}
case 0x31: /* Palette loading on modeset */
{
if (!IS_VGA_ARCH) break;