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- calculation of the number vertical tiles added for all graphics modes.

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- screen height of the graphics mode 640x350 fixed
This commit is contained in:
Volker Ruppert 2002-10-05 08:04:28 +00:00
parent 0d22bbafc2
commit 4bdd5acaeb
1 changed files with 19 additions and 10 deletions
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29
bochs/iodev/vga.cc
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@ -1,5 +1,5 @@
/////////////////////////////////////////////////////////////////////////
// $Id: vga.cc,v 1.43 2002-10-02 05:16:01 kevinlawton Exp $
// $Id: vga.cc,v 1.44 2002-10-05 08:04:28 vruppert Exp $
/////////////////////////////////////////////////////////////////////////
//
// Copyright (C) 2002 MandrakeSoft S.A.
@ -279,7 +279,7 @@ bx_vga_c::determine_screen_dimensions(unsigned *piHeight, unsigned *piWidth)
BX_VGA_THIS s.CRTC.reg[9] == 0x40)
{
*piWidth = 640;
*piHeight = 352;
*piHeight = 350;
}
if (BX_VGA_THIS s.CRTC.reg[23] == 0xE3 &&
BX_VGA_THIS s.CRTC.reg[20] == 0 &&
@ -1212,7 +1212,7 @@ bx_vga_c::update(void)
{
// specific VBE code display update code
// this is partly copied/modified from the 320x200x8 update more below
unsigned xti, yti;
unsigned xti, yti, y_tiles;
Bit8u color;
unsigned r, c;
unsigned long byte_offset;
@ -1223,8 +1223,9 @@ bx_vga_c::update(void)
// incl virtual xres correction
Bit32u start_offset = ((BX_VGA_THIS s.vbe_offset_y) * (BX_VGA_THIS s.vbe_virtual_xres)) + BX_VGA_THIS s.vbe_offset_x;
y_tiles = iHeight / Y_TILESIZE + ((iHeight % Y_TILESIZE) > 0);
for (yti=0; yti<iHeight/Y_TILESIZE; yti++)
for (yti=0; yti<y_tiles; yti++)
for (xti=0; xti<iWidth/X_TILESIZE; xti++)
{
if (BX_VGA_THIS s.vga_tile_updated[xti][yti])
@ -1268,7 +1269,7 @@ bx_vga_c::update(void)
Bit8u color;
unsigned bit_no, r, c;
unsigned long byte_offset;
unsigned xti, yti;
unsigned xti, yti, y_tiles;
//BX_DEBUG(("update: shiftreg=%u, chain4=%u, mapping=%u",
@ -1294,8 +1295,9 @@ bx_vga_c::update(void)
}
start_addr = (BX_VGA_THIS s.CRTC.reg[0x0c] << 8) | BX_VGA_THIS s.CRTC.reg[0x0d];
y_tiles = iHeight / Y_TILESIZE + ((iHeight % Y_TILESIZE) > 0);
for (yti=0; yti<iHeight/Y_TILESIZE; yti++)
for (yti=0; yti<y_tiles; yti++)
for (xti=0; xti<iWidth/X_TILESIZE; xti++) {
if (BX_VGA_THIS s.vga_tile_updated[xti][yti]) {
for (r=0; r<Y_TILESIZE; r++) {
@ -1349,7 +1351,9 @@ bx_vga_c::update(void)
old_iHeight = iHeight;
}
for (yti=0; yti<=iHeight/Y_TILESIZE; yti++)
y_tiles = iHeight / Y_TILESIZE + ((iHeight % Y_TILESIZE) > 0);
for (yti=0; yti<y_tiles; yti++)
for (xti=0; xti<iWidth/X_TILESIZE; xti++) {
if (BX_VGA_THIS s.vga_tile_updated[xti][yti]) {
for (r=0; r<Y_TILESIZE; r++) {
@ -1380,7 +1384,7 @@ bx_vga_c::update(void)
break; // case 1
case 2: // output the data eight bits at a time from the 4 bit planeBX_VGA_THIS s.
case 2: // output the data eight bits at a time from the 4 bit plane
// (format for VGA mode 13 hex)
determine_screen_dimensions(&iHeight, &iWidth);
@ -1397,7 +1401,10 @@ bx_vga_c::update(void)
old_iHeight = iHeight;
old_iWidth = iWidth;
}
for (yti=0; yti<iHeight/Y_TILESIZE; yti++)
y_tiles = iHeight / Y_TILESIZE + ((iHeight % Y_TILESIZE) > 0);
for (yti=0; yti<y_tiles; yti++)
for (xti=0; xti<iWidth/X_TILESIZE; xti++) {
if (BX_VGA_THIS s.vga_tile_updated[xti][yti]) { // }
// if (1) {
@ -1432,7 +1439,9 @@ bx_vga_c::update(void)
}
start_addr = (BX_VGA_THIS s.CRTC.reg[0x0c] << 8) | BX_VGA_THIS s.CRTC.reg[0x0d];
for (yti=0; yti<iHeight/Y_TILESIZE; yti++)
y_tiles = iHeight / Y_TILESIZE + ((iHeight % Y_TILESIZE) > 0);
for (yti=0; yti<y_tiles; yti++)
for (xti=0; xti<iWidth/X_TILESIZE; xti++) {
// if (BX_VGA_THIS s.vga_tile_updated[xti][yti]) { // }
if (1) {