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Corrected calculation of page starts when changing active page.

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Characters get written to correct page now


Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@1222
This commit is contained in:
Sjoerd van der Berg 2003-09-03 20:24:09 +00:00
parent a202f5f175
commit 7cb8ed12e0
1 changed files with 23 additions and 20 deletions
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43
src/ints/int10_char.cpp
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@ -116,7 +116,7 @@ void INT10_ScrollWindow(Bit8u rul,Bit8u cul,Bit8u rlr,Bit8u clr,Bit8s nlines,Bit
/* Get the correct page */
if(page==0xFF) page=real_readb(BIOSMEM_SEG,BIOSMEM_CURRENT_PAGE);
PhysPt base=CurMode->pstart+CurMode->plength*page;
PhysPt base=CurMode->pstart+page*real_readw(BIOSMEM_SEG,BIOSMEM_PAGE_SIZE);
/* See how much lines need to be copied */
Bit8u start,end;Bits next;
@ -174,22 +174,22 @@ filling:
void INT10_SetActivePage(Bit8u page) {
Bit16u mem_address;
Bit8u cur_col=0 ,cur_row=0 ;
if (page>7) return;
mem_address=page*CurMode->plength;
mem_address=page*real_readw(BIOSMEM_SEG,BIOSMEM_PAGE_SIZE);
/* Write the new page start */
real_writew(BIOSMEM_SEG,BIOSMEM_CURRENT_START,mem_address);
if (CurMode->mode<0x8) mem_address>>=1;
/* Write the new start address in vgahardware */
IO_Write(real_readw(BIOSMEM_SEG,BIOSMEM_CRTC_ADDRESS),0x0c);
IO_Write(real_readw(BIOSMEM_SEG,BIOSMEM_CRTC_ADDRESS)+1,(mem_address&0xff00)>>8);
IO_Write(real_readw(BIOSMEM_SEG,BIOSMEM_CRTC_ADDRESS)+1,(Bit8u)(mem_address>>8));
IO_Write(real_readw(BIOSMEM_SEG,BIOSMEM_CRTC_ADDRESS),0x0d);
IO_Write(real_readw(BIOSMEM_SEG,BIOSMEM_CRTC_ADDRESS)+1,mem_address&0x00ff);
IO_Write(real_readw(BIOSMEM_SEG,BIOSMEM_CRTC_ADDRESS)+1,(Bit8u)mem_address);
// And change the BIOS page
real_writeb(BIOSMEM_SEG,BIOSMEM_CURRENT_PAGE,page);
Bit8u cur_row=CURSOR_POS_ROW(page);
Bit8u cur_col=CURSOR_POS_COL(page);
// Display the cursor, now the page is active
INT10_SetCursorPos(cur_row,cur_col,page);
}
@ -253,26 +253,29 @@ void INT10_SetCursorPos(Bit8u row,Bit8u col,Bit8u page) {
Bit8u current=real_readb(BIOSMEM_SEG,BIOSMEM_CURRENT_PAGE);
if(page==current) {
// Get the dimensions
BIOS_NCOLS;BIOS_NROWS;
BIOS_NCOLS;
// Calculate the address knowing nbcols nbrows and page num
address=SCREEN_IO_START(ncols,nrows,page)+col+row*ncols;
address=(ncols*row)+col+real_readw(BIOSMEM_SEG,BIOSMEM_CURRENT_START);
// CRTC regs 0x0e and 0x0f
IO_Write(real_readw(BIOSMEM_SEG,BIOSMEM_CRTC_ADDRESS),0x0e);
IO_Write(real_readw(BIOSMEM_SEG,BIOSMEM_CRTC_ADDRESS)+1,(address&0xff00)>>8);
IO_Write(real_readw(BIOSMEM_SEG,BIOSMEM_CRTC_ADDRESS)+1,(Bit8u)(address>>8));
IO_Write(real_readw(BIOSMEM_SEG,BIOSMEM_CRTC_ADDRESS),0x0f);
IO_Write(real_readw(BIOSMEM_SEG,BIOSMEM_CRTC_ADDRESS)+1,address&0x00ff);
IO_Write(real_readw(BIOSMEM_SEG,BIOSMEM_CRTC_ADDRESS)+1,(Bit8u)address);
}
}
void INT10_ReadCharAttr(Bit16u * result,Bit8u page) {
if(page==0xFF) page=real_readb(BIOSMEM_SEG,BIOSMEM_CURRENT_PAGE);
BIOS_NCOLS;BIOS_NROWS;
Bit8u cur_row=CURSOR_POS_ROW(page);
Bit8u cur_col=CURSOR_POS_COL(page);
Bit16u address=SCREEN_MEM_START(ncols,nrows,page)+(cur_col+cur_row*ncols)*2;
*result=real_readw(0xb800,address);
// Compute the address
Bit16u address=page*real_readw(BIOSMEM_SEG,BIOSMEM_PAGE_SIZE);
address+=(cur_row*real_readw(BIOSMEM_SEG,BIOSMEM_NB_COLS)+cur_col)*2;
// REad the char
PhysPt where = CurMode->pstart+address;
*result=mem_readw(where);
}
@ -283,7 +286,8 @@ static void WriteChar(Bit16u col,Bit16u row,Bit8u page,Bit8u chr,Bit8u attr,bool
case M_TEXT16:
{
// Compute the address
Bit16u address=SCREEN_MEM_START(CurMode->twidth,CurMode->theight,page)+(col+row*CurMode->twidth)*2;
Bit16u address=page*real_readw(BIOSMEM_SEG,BIOSMEM_PAGE_SIZE);
address+=(row*real_readw(BIOSMEM_SEG,BIOSMEM_NB_COLS)+col)*2;
// Write the char
PhysPt where = CurMode->pstart+address;
mem_writeb(where,chr);
@ -341,10 +345,9 @@ void INT10_WriteChar(Bit8u chr,Bit8u attr,Bit8u page,Bit16u count,bool showattr)
}
void INT10_TeletypeOutput(Bit8u chr,Bit8u attr,bool showattr, Bit8u page) {
void INT10_TeletypeOutput(Bit8u chr,Bit8u attr,bool showattr) {
//TODO Check if this page thing is correct
if (CurMode->type!=M_TEXT16) page=0xff;
if(page==0xFF) page=real_readb(BIOSMEM_SEG,BIOSMEM_CURRENT_PAGE);
Bit8u page=real_readb(BIOSMEM_SEG,BIOSMEM_CURRENT_PAGE);
BIOS_NCOLS;BIOS_NROWS;
Bit8u cur_row=CURSOR_POS_ROW(page);
Bit8u cur_col=CURSOR_POS_COL(page);
@ -365,7 +368,7 @@ void INT10_TeletypeOutput(Bit8u chr,Bit8u attr,bool showattr, Bit8u page) {
break;
case '\t':
do {
INT10_TeletypeOutput(' ',attr,showattr,page);
INT10_TeletypeOutput(' ',attr,showattr);
cur_row=CURSOR_POS_ROW(page);
cur_col=CURSOR_POS_COL(page);
} while(cur_col%8==0);
@ -411,7 +414,7 @@ void INT10_WriteString(Bit8u row,Bit8u col,Bit8u flag,Bit8u attr,PhysPt string,B
attr=mem_readb(string);
string++;
}
INT10_TeletypeOutput(chr,attr,true,page);
INT10_TeletypeOutput(chr,attr,true);
count--;
}
if (flag & 1) {