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Fixes to hercules emulation, better detection and bank switching

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Fixes to tandy emulation, 640x200x16 mode and different sizes bank.
EGA/VGA memory changes detection for faster rendering added
Renderer does initial pass to check for needing to lock buffer


Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@2781
This commit is contained in:
Sjoerd van der Berg 2007-01-24 16:29:09 +00:00
parent 667c756775
commit 5660ee1856
16 changed files with 1132 additions and 565 deletions
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5
src/ints/int10.cpp
View file

@ -195,6 +195,8 @@ static Bitu INT10_Handler(void) {
}
break;
case 0x11: /* Character generator functions */
if (machine<MCH_VGA)
break;
switch (reg_al) {
/* Textmode calls */
case 0x00: /* Load user font */
@ -289,7 +291,8 @@ graphics_chars:
}
break;
case 0x12: /* alternate function select */
if (machine<MCH_VGA) break;
if (machine<MCH_VGA)
break;
switch (reg_bl) {
case 0x10: /* Get EGA Information */
reg_bh=(real_readw(BIOSMEM_SEG,BIOSMEM_CRTC_ADDRESS)==0x3B4);

22
src/ints/int10_modes.cpp
View file

@ -238,7 +238,7 @@ static void FinishSetMode(bool clearmem) {
case M_CGA2:
case M_TANDY16:
for (i=0;i<16*1024;i++) {
real_writew(0xb800,i*2,0x0000);
real_writew( 0xb800,i*2,0x0000);
}
break;
case M_TEXT:
@ -307,7 +307,12 @@ bool INT10_SetVideoMode_OTHER(Bitu mode,bool clearmem) {
}
break;
case MCH_HERC:
if (mode!=7) return false;
if (mode!=7) {
//Just the text memory, most games seem to use any random mode to clear the screen
for (i=0;i<16*1024;i++)
real_writew(0xb000,i*2,0x0120);
return false;
}
CurMode=&Hercules_Mode;
break;
}
@ -373,8 +378,10 @@ bool INT10_SetVideoMode_OTHER(Bitu mode,bool clearmem) {
case MCH_HERC:
IO_WriteB(0x3bf,0x3); //Enable changing all bits
IO_WriteB(0x3b8,0x8); //TEXT mode and non-blinking characters
IO_WriteB(0x3bf,0x0); //Disable changing all bits
VGA_DAC_CombineColor(1,0xf);
IO_WriteB(0x3bf,0x0);
VGA_DAC_CombineColor(0,0);
for ( i = 1; i < 15;i++)
VGA_DAC_CombineColor(i,0xf);
break;
case MCH_CGA:
mode_control=mode_control_list[CurMode->mode];
@ -400,6 +407,12 @@ bool INT10_SetVideoMode_OTHER(Bitu mode,bool clearmem) {
default:
IO_WriteB(0x3de,0x0);break;
}
//Clear extended mapping
IO_WriteB(0x3da,0x5);
IO_WriteB(0x3de,0x0);
//Clear monitor mode
IO_WriteB(0x3da,0x8);
IO_WriteB(0x3de,0x0);
crtpage=(CurMode->mode>=0x9) ? 0xf6 : 0x3f;
IO_WriteB(0x3df,crtpage);
real_writeb(BIOSMEM_SEG,BIOSMEM_CRTCPU_PAGE,crtpage);
@ -974,7 +987,6 @@ dac_text16:
}
IO_Write(crtc_base,0x31);IO_Write(crtc_base+1,reg_31); //Enable banked memory and 256k+ access
IO_Write(crtc_base,0x58);IO_Write(crtc_base+1,0x3); //Enable 8 mb of linear addressing
IO_Write(crtc_base,0x58);IO_Write(crtc_base+1,0x3); //Enable 8 mb of linear addressing
IO_Write(crtc_base,0x38);IO_Write(crtc_base+1,0x48); //Register lock 1
IO_Write(crtc_base,0x39);IO_Write(crtc_base+1,0xa5); //Register lock 2