valter/dosbox-staging
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patch to latch bytepanning at display start. Fixes some graphic distortion with commanche. (Danke h-a-l-9000)

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Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@3275
This commit is contained in:
Peter Veenstra 2009-01-26 20:23:44 +00:00
parent 6945f3e81f
commit 5a228425fd
2 changed files with 8 additions and 6 deletions
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3
include/vga.h
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@ -16,7 +16,7 @@
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/* $Id: vga.h,v 1.44 2008-08-24 16:43:06 qbix79 Exp $ */
/* $Id: vga.h,v 1.45 2009-01-26 20:23:44 qbix79 Exp $ */
#ifndef DOSBOX_VGA_H
#define DOSBOX_VGA_H
@ -119,6 +119,7 @@ typedef struct {
Bitu blocks;
Bitu address;
Bitu panning;
Bitu bytes_skip;
Bit8u *linear_base;
Bitu linear_mask;
Bitu address_add;

11
src/hardware/vga_draw.cpp
View file

@ -16,7 +16,7 @@
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/* $Id: vga_draw.cpp,v 1.105 2009-01-11 18:22:59 c2woody Exp $ */
/* $Id: vga_draw.cpp,v 1.106 2009-01-26 20:23:44 qbix79 Exp $ */
#include <string.h>
#include <math.h>
@ -609,7 +609,7 @@ static void VGA_ProcessSplit() {
} else {
// In text mode only the characters are shifted by panning, not the address;
// this is done in the text line draw function.
vga.draw.address = vga.draw.byte_panning_shift*vga.config.bytes_skip;
vga.draw.address = vga.draw.byte_panning_shift*vga.draw.bytes_skip;
if (!(vga.mode==M_TEXT)) vga.draw.address += vga.draw.panning;
}
vga.draw.address_line=0;
@ -717,6 +717,7 @@ static void VGA_VertInterrupt(Bitu /*val*/) {
static void VGA_DisplayStartLatch(Bitu /*val*/) {
vga.config.real_start=vga.config.display_start & (vga.vmemwrap-1);
vga.draw.bytes_skip = vga.config.bytes_skip;
}
static void VGA_PanningLatch(Bitu /*val*/) {
@ -780,7 +781,7 @@ static void VGA_VerticalTimer(Bitu /*val*/) {
case M_EGA:
case M_LIN4:
vga.draw.byte_panning_shift = 8;
vga.draw.address += vga.config.bytes_skip;
vga.draw.address += vga.draw.bytes_skip;
vga.draw.address *= vga.draw.byte_panning_shift;
vga.draw.address += vga.draw.panning;
#ifdef VGA_KEEP_CHANGES
@ -800,7 +801,7 @@ static void VGA_VerticalTimer(Bitu /*val*/) {
case M_LIN16:
case M_LIN32:
vga.draw.byte_panning_shift = 4;
vga.draw.address += vga.config.bytes_skip;
vga.draw.address += vga.draw.bytes_skip;
vga.draw.address *= vga.draw.byte_panning_shift;
vga.draw.address += vga.draw.panning;
#ifdef VGA_KEEP_CHANGES
@ -812,7 +813,7 @@ static void VGA_VerticalTimer(Bitu /*val*/) {
else vga.draw.byte_panning_shift = 0;
if ((IS_VGA_ARCH) && (svgaCard==SVGA_None)) vga.draw.address = vga.config.real_start * 2;
else vga.draw.address = vga.config.display_start * 2;
vga.draw.address += vga.config.bytes_skip*vga.draw.byte_panning_shift;
vga.draw.address += vga.draw.bytes_skip*vga.draw.byte_panning_shift;
case M_TANDY_TEXT:
case M_HERC_TEXT:
vga.draw.cursor.address=vga.config.cursor_start*2;