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add setmode corrections from ih8regs (patch 1198821);

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change vga mode detection (Prehistorik 2)


Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@2313
This commit is contained in:
Sebastian Strohhäcker 2005-09-17 13:15:36 +00:00
parent 7b1990cdcf
commit 9be07ec88b
3 changed files with 101 additions and 41 deletions
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7
src/hardware/vga.cpp
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@ -52,12 +52,17 @@ void VGA_DetermineMode(void) {
}
/* Test for graphics or alphanumeric mode */
} else if (vga.attr.mode_control & 1) {
if (vga.gfx.mode & 0x40) VGA_SetMode(M_VGA);
else if (vga.gfx.mode & 0x20) VGA_SetMode(M_CGA4);
else if ((vga.gfx.miscellaneous & 0x0c)==0x0c) VGA_SetMode(M_CGA2);
else VGA_SetMode(M_EGA16);
/* old mode detection:
if (!(vga.crtc.mode_control & 0x1)) {
if (vga.gfx.mode & 0x20) VGA_SetMode(M_CGA4);
else VGA_SetMode(M_CGA2);
} else if (vga.attr.mode_control & 0x40) {
VGA_SetMode(M_VGA);
} else VGA_SetMode(M_EGA16);
} else VGA_SetMode(M_EGA16); */
} else {
VGA_SetMode(M_TEXT);
}

2
src/hardware/vga_draw.cpp
View file

@ -441,7 +441,7 @@ void VGA_SetupDrawing(Bitu val) {
case M_CGA2:
doubleheight=true;
vga.draw.blocks=2*width;
width<<=4;
width<<=3;
VGA_DrawLine=VGA_Draw_1BPP_Line;
break;
case M_TEXT: