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Add support for mode 8 row copy/fill. Fixes Tandy GW-BASIC interpreter SCREEN 3 scrolling/clearing.

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Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@3973
This commit is contained in:
ripsaw8080 2016-03-29 21:08:40 +00:00
parent 58c495998a
commit 3a8712202e
1 changed files with 9 additions and 13 deletions
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22
src/ints/int10_char.cpp
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@ -54,14 +54,12 @@ static void CGA4_CopyRow(Bit8u cleft,Bit8u cright,Bit8u rold,Bit8u rnew,PhysPt b
static void TANDY16_CopyRow(Bit8u cleft,Bit8u cright,Bit8u rold,Bit8u rnew,PhysPt base) {
Bit8u cheight = real_readb(BIOSMEM_SEG,BIOSMEM_CHAR_HEIGHT);
PhysPt dest=base+((CurMode->twidth*rnew)*(cheight/4)+cleft)*4;
PhysPt src=base+((CurMode->twidth*rold)*(cheight/4)+cleft)*4;
Bit8u banks=CurMode->twidth/10;
PhysPt dest=base+((CurMode->twidth*rnew)*(cheight/banks)+cleft)*4;
PhysPt src=base+((CurMode->twidth*rold)*(cheight/banks)+cleft)*4;
Bitu copy=(cright-cleft)*4;Bitu nextline=CurMode->twidth*4;
for (Bitu i=0;i<cheight/4U;i++) {
MEM_BlockCopy(dest,src,copy);
MEM_BlockCopy(dest+8*1024,src+8*1024,copy);
MEM_BlockCopy(dest+16*1024,src+16*1024,copy);
MEM_BlockCopy(dest+24*1024,src+24*1024,copy);
for (Bitu i=0;i<cheight/banks;i++) {
for (Bitu b=0;b<banks;b++) MEM_BlockCopy(dest+b*8*1024,src+b*8*1024,copy);
dest+=nextline;src+=nextline;
}
}
@ -138,15 +136,13 @@ static void CGA4_FillRow(Bit8u cleft,Bit8u cright,Bit8u row,PhysPt base,Bit8u at
static void TANDY16_FillRow(Bit8u cleft,Bit8u cright,Bit8u row,PhysPt base,Bit8u attr) {
Bit8u cheight = real_readb(BIOSMEM_SEG,BIOSMEM_CHAR_HEIGHT);
PhysPt dest=base+((CurMode->twidth*row)*(cheight/4)+cleft)*4;
Bit8u banks=CurMode->twidth/10;
PhysPt dest=base+((CurMode->twidth*row)*(cheight/banks)+cleft)*4;
Bitu copy=(cright-cleft)*4;Bitu nextline=CurMode->twidth*4;
attr=(attr & 0xf) | (attr & 0xf) << 4;
for (Bitu i=0;i<cheight/4U;i++) {
for (Bitu i=0;i<cheight/banks;i++) {
for (Bitu x=0;x<copy;x++) {
mem_writeb(dest+x,attr);
mem_writeb(dest+8*1024+x,attr);
mem_writeb(dest+16*1024+x,attr);
mem_writeb(dest+24*1024+x,attr);
for (Bitu b=0;b<banks;b++) mem_writeb(dest+b*8*1024+x,attr);
}
dest+=nextline;
}