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add partial ega-only machine

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Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@2992
This commit is contained in:
Sebastian Strohhäcker 2007-09-20 16:42:43 +00:00
parent 5c9a311f7b
commit 6188566e38
23 changed files with 208 additions and 111 deletions
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34
src/ints/int10.cpp
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@ -140,7 +140,9 @@ static Bitu INT10_Handler(void) {
reg_al=real_readb(BIOSMEM_SEG,BIOSMEM_CURRENT_MODE)|(real_readb(BIOSMEM_SEG,BIOSMEM_VIDEO_CTL)&0x80);
reg_ah=(Bit8u)real_readw(BIOSMEM_SEG,BIOSMEM_NB_COLS);
break;
case 0x10: /* EGA/VGA Palette functions */
case 0x10: /* Palette functions */
if ((machine==MCH_CGA) || ((!IS_VGA_ARCH) && (reg_al>0x02))) break;
//TODO: subfunction 0x03 for ega
switch (reg_al) {
case 0x00: /* SET SINGLE PALETTE REGISTER */
INT10_SetSinglePaletteRegister(reg_bl,reg_bh);
@ -195,7 +197,7 @@ static Bitu INT10_Handler(void) {
}
break;
case 0x11: /* Character generator functions */
if (machine<MCH_VGA)
if (!IS_EGAVGA_ARCH)
break;
switch (reg_al) {
/* Textmode calls */
@ -216,6 +218,7 @@ static Bitu INT10_Handler(void) {
break;
case 0x04: /* Load 8x16 font */
case 0x14:
if (!IS_VGA_ARCH) break;
INT10_LoadFont(Real2Phys(int10.rom.font_16),reg_al==0x14,256,0,0,16);
break;
/* Graphics mode calls */
@ -235,6 +238,7 @@ static Bitu INT10_Handler(void) {
real_writew(BIOSMEM_SEG,BIOSMEM_CHAR_HEIGHT,8);
goto graphics_chars;
case 0x24: /* Rom 8x16 set */
if (!IS_VGA_ARCH) break;
RealSetVec(0x43,int10.rom.font_16);
real_writew(BIOSMEM_SEG,BIOSMEM_CHAR_HEIGHT,16);
goto graphics_chars;
@ -277,6 +281,7 @@ graphics_chars:
reg_bp=RealOff(int10.rom.font_8_second);
break;
case 0x06: /* font 8x16 */
if (!IS_VGA_ARCH) break;
SegSet16(es,RealSeg(int10.rom.font_16));
reg_bp=RealOff(int10.rom.font_16);
break;
@ -291,7 +296,7 @@ graphics_chars:
}
break;
case 0x12: /* alternate function select */
if (machine<MCH_VGA)
if (!IS_EGAVGA_ARCH)
break;
switch (reg_bl) {
case 0x10: /* Get EGA Information */
@ -302,20 +307,27 @@ graphics_chars:
case 0x20: /* Set alternate printscreen */
break;
case 0x30: /* Select vertical resolution */
case 0x32: /* Video adressing */
if (!IS_VGA_ARCH) break;
LOG(LOG_INT10,LOG_ERROR)("Function 12:Call %2X not handled",reg_bl);
reg_al=0x12; //fake a success call
break;
case 0x31: /* Palette loading on modeset */
{
if (!IS_VGA_ARCH) break;
Bit8u temp = real_readb(BIOSMEM_SEG,BIOSMEM_MODESET_CTL) & 0xf7;
if (reg_al&1) temp|=8; // enable if al=0
real_writeb(BIOSMEM_SEG,BIOSMEM_MODESET_CTL,temp);
reg_al=0x12;
break;
}
case 0x32: /* Video adressing */
if (!IS_VGA_ARCH) break;
LOG(LOG_INT10,LOG_ERROR)("Function 12:Call %2X not handled",reg_bl);
reg_al=0x12; //fake a success call
break;
case 0x33: /* SWITCH GRAY-SCALE SUMMING */
{
if (!IS_VGA_ARCH) break;
Bit8u temp = real_readb(BIOSMEM_SEG,BIOSMEM_MODESET_CTL) & 0xfd;
if (!(reg_al&1)) temp|=2; // enable if al=0
real_writeb(BIOSMEM_SEG,BIOSMEM_MODESET_CTL,temp);
@ -325,12 +337,19 @@ graphics_chars:
case 0x34: /* ALTERNATE FUNCTION SELECT (VGA) - CURSOR EMULATION */
{
// bit 0: 0=enable, 1=disable
if (!IS_VGA_ARCH) break;
Bit8u temp = real_readb(BIOSMEM_SEG,BIOSMEM_VIDEO_CTL) & 0xfe;
real_writeb(BIOSMEM_SEG,BIOSMEM_VIDEO_CTL,temp|reg_al);
reg_al=0x12;
break;
}
case 0x35:
if (!IS_VGA_ARCH) break;
LOG(LOG_INT10,LOG_ERROR)("Function 12:Call %2X not handled",reg_bl);
reg_al=0x12;
break;
case 0x36: /* VGA Refresh control */
if (!IS_VGA_ARCH) break;
/*
Call disables/enables the vga from outputting video,
don't support it, but fake a success return
@ -347,7 +366,7 @@ graphics_chars:
INT10_WriteString(reg_dh,reg_dl,reg_al,reg_bl,SegPhys(es)+reg_bp,reg_cx,reg_bh);
break;
case 0x1A: /* Display Combination */
if (machine<MCH_VGA) break;
if (!IS_VGA_ARCH) break;
if (reg_al==0) {
reg_bx=real_readb(BIOSMEM_SEG,BIOSMEM_DCC_INDEX);
reg_al=0x1A;
@ -360,7 +379,7 @@ graphics_chars:
}
break;
case 0x1B: /* functionality State Information */
if (machine<MCH_VGA) break;
if (!IS_VGA_ARCH) break;
switch (reg_bx) {
case 0x0000:
INT10_GetFuncStateInformation(SegPhys(es)+reg_di);
@ -371,11 +390,12 @@ graphics_chars:
}
break;
case 0x1C: /* Video Save Area */
if (machine<MCH_VGA) break;
if (IS_VGA_ARCH) break;
if (reg_al==0) reg_bx = 0;
reg_al = 0x1C;
break;
case 0x4f: /* VESA Calls */
if ((!IS_VGA_ARCH) || (svgaCard==SVGA_None)) break;
switch (reg_al) {
case 0x00: /* Get SVGA Information */
reg_al=0x4f;