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Add final (slightly modified and extended) part of patch 1295927 (vga accuracy) from keith. Add (modified) bug/patch 1241142(ansi emulation updates) from moe. Add fix suggested by vasyl to fix MyChess. Corrected some missing parts in these patches. (Missing update nbrows in dev_con.h). Implemented a writebuffer to workaround the CR/LF issue. Let's hope everything still works

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Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@2333
This commit is contained in:
Peter Veenstra 2005-10-02 10:12:31 +00:00
parent 06d4ae4b3b
commit 0b4350c79d
7 changed files with 66 additions and 36 deletions
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9
src/ints/int10.cpp
View file

@ -46,6 +46,7 @@ static Bitu INT10_Handler(void) {
break;
}
#endif
switch (reg_ah) {
case 0x00: /* Set VideoMode */
INT10_SetVideoMode(reg_al);
@ -279,6 +280,14 @@ graphics_chars:
reg_cx=real_readb(BIOSMEM_SEG,BIOSMEM_SWITCHES) & 0x0F;
break;
}
case 0x34: /* ALTERNATE FUNCTION SELECT (VGA) - CURSOR EMULATION */
{
// bit 0: 0=enable, 1=disable
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 0x36: /* VGA Refresh control */
/*
Call disables/enables the vga from outputting video,

2
src/ints/int10.h
View file

@ -92,7 +92,7 @@
#define VGAMEM_MTEXT 0xB000
#define BIOS_NCOLS Bit16u ncols=real_readw(BIOSMEM_SEG,BIOSMEM_NB_COLS);
#define BIOS_NROWS Bit16u nrows=real_readb(BIOSMEM_SEG,BIOSMEM_NB_ROWS)+1;
#define BIOS_NROWS Bit16u nrows=real_readb(BIOSMEM_SEG,BIOSMEM_NB_ROWS);
extern Bit8u int10_font_08[256 * 8];
extern Bit8u int10_font_14[256 * 14];

12
src/ints/int10_char.cpp
View file

@ -16,7 +16,7 @@
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/* $Id: int10_char.cpp,v 1.37 2005-09-01 14:31:40 qbix79 Exp $ */
/* $Id: int10_char.cpp,v 1.38 2005-10-02 10:12:31 qbix79 Exp $ */
/* Character displaying moving functions */
@ -309,11 +309,12 @@ void INT10_SetCursorShape(Bit8u first,Bit8u last) {
goto dowrite;
}
/* Check if we need to convert CGA Bios cursor values */
if (!(real_readb(BIOSMEM_SEG,BIOSMEM_VIDEO_CTL) & 0x1)) {
if (!(real_readb(BIOSMEM_SEG,BIOSMEM_VIDEO_CTL) & 0x1)) { // set by int10 fun12 sub34
// if (CurMode->mode>0x3) goto dowrite; //Only mode 0-3 are text modes on cga
if ((first & 0xe0) || (last & 0xe0)) goto dowrite;
Bit8u cheight=real_readb(BIOSMEM_SEG,BIOSMEM_CHAR_HEIGHT)-1;
/* Creative routine i based of the original ibmvga bios */
if (last<first) {
if (!last) goto dowrite;
first=last;
@ -331,8 +332,9 @@ void INT10_SetCursorShape(Bit8u first,Bit8u last) {
} else {
first=(first-last)+cheight;
last=cheight;
if (cheight>0xc) {
first--;
if (cheight>0xc) { // vgatest sets 15 15 2x where only one should be decremented to 14 14
first--; // implementing int10 fun12 sub34 fixed this.
last--;
}
}
@ -537,7 +539,7 @@ void INT10_TeletypeOutputAttr(Bit8u chr,Bit8u attr,bool useattr) {
cur_col=0;
break;
case '\n':
cur_col=0;
// cur_col=0; //Seems to break an old chess game
cur_row++;
break;
case '\t':

2
src/ints/int10_memory.cpp
View file

@ -66,7 +66,7 @@ void INT10_LoadFont(PhysPt font,bool reload,Bitu count,Bitu offset,Bitu map,Bitu
IO_Write(base+1,(IO_Read(base+1) & 0xe0)|(height-1));
//Vertical display end bios says, but should stay the same?
//Rows setting in bios segment
real_writeb(BIOSMEM_SEG,BIOSMEM_NB_ROWS,(CurMode->sheight/height)-1);
real_writeb(BIOSMEM_SEG,BIOSMEM_NB_ROWS,(CurMode->sheight/height));
real_writeb(BIOSMEM_SEG,BIOSMEM_CHAR_HEIGHT,height);
//TODO Reprogram cursor size?
}

8
src/ints/int10_modes.cpp
View file

@ -223,7 +223,7 @@ static void FinishSetMode(bool clearmem) {
real_writew(BIOSMEM_SEG,BIOSMEM_NB_COLS,CurMode->twidth);
real_writew(BIOSMEM_SEG,BIOSMEM_PAGE_SIZE,CurMode->plength);
real_writew(BIOSMEM_SEG,BIOSMEM_CRTC_ADDRESS,((CurMode->mode==7 )|| (CurMode->mode==0x0f)) ? 0x3b4 : 0x3d4);
real_writeb(BIOSMEM_SEG,BIOSMEM_NB_ROWS,CurMode->theight-1);
real_writeb(BIOSMEM_SEG,BIOSMEM_NB_ROWS,CurMode->theight);
real_writew(BIOSMEM_SEG,BIOSMEM_CHAR_HEIGHT,CurMode->cheight);
real_writeb(BIOSMEM_SEG,BIOSMEM_VIDEO_CTL,(0x60|(clearmem?0:0x80)));
real_writeb(BIOSMEM_SEG,BIOSMEM_SWITCHES,0x09);
@ -487,12 +487,6 @@ bool INT10_SetVideoMode(Bitu mode) {
overflow|=((CurMode->vtotal-2) & 0x200) >> 4;
ver_overflow|=((CurMode->vtotal-2) & 0x400) >> 10;
/*
These aren't exactly accurate i think,
Should be more like a certain percentage based on vertical total
So you get same sized borders, but okay :)
*/
Bitu vretrace;
switch (CurMode->vdispend) {
case 400: vretrace=CurMode->vdispend+12;