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vga 2 color mode

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Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@128
This commit is contained in:
Sjoerd van der Berg 2002-08-08 16:18:43 +00:00
parent 1bf741280b
commit f622860eb2
1 changed files with 9 additions and 4 deletions
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13
src/hardware/vga.cpp
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@ -39,6 +39,7 @@ Bit32u FillTable[16]={
static PageEntry VGA_PageEntry;
void VGA_Render_GFX_2(Bit8u * * data);
void VGA_Render_GFX_4(Bit8u * * data);
void VGA_Render_GFX_16(Bit8u * * data);
void VGA_Render_GFX_256C(Bit8u * * data);
@ -67,7 +68,8 @@ void VGA_FindSettings(void) {
} else if (vga.config.cga_enabled) {
/* 4 color cga */
//TODO Detect hercules modes, probably set them up in bios too
vga.mode=GFX_4;
if (vga.config.pixel_double) vga.mode=GFX_4;
else vga.mode=GFX_2;
// VGA_PageEntry.base=0xB8000;
// VGA_PageEntry.handler.read=VGA_GFX_4_ReadHandler;
// VGA_PageEntry.handler.write=VGA_GFX_4_WriteHandler;
@ -119,6 +121,12 @@ static void VGA_DoResize(void) {
pitch=width;
renderer=&VGA_Render_GFX_4;
break;
case GFX_2:
width<<=3;
height<<=1;
pitch=width;
renderer=&VGA_Render_GFX_2;
break;
case TEXT_16:
/* probably a 16-color text mode, got to detect mono mode somehow */
width<<=3; /* 8 bit wide text font */
@ -144,14 +152,11 @@ void VGA_StartResize(void) {
}
void VGA_Init() {
vga.draw.resizing=false;
VGA_SetupMemory();
VGA_SetupMisc();
VGA_SetupDAC();
VGA_SetupCRTC();
VGA_SetupGFX();
VGA_SetupSEQ();
VGA_SetupAttr();