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add Tandy 4-colour hires mode (0x0a);

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fix bios putpixel for modes 0x08, 0x0a (also used by bios write)


Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@2401
This commit is contained in:
Sebastian Strohhäcker 2005-12-04 10:35:51 +00:00
parent de579c6a89
commit 6ede5e436f
5 changed files with 60 additions and 13 deletions
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38
src/ints/int10_put_pixel.cpp
View file

@ -28,16 +28,32 @@ void INT10_PutPixel(Bit16u x,Bit16u y,Bit8u page,Bit8u color) {
switch (CurMode->type) {
case M_CGA4:
{
Bit16u off=(y>>1)*80+(x>>2);
if (y&1) off+=8*1024;
Bit8u old=real_readb(0xb800,off);
if (color & 0x80) {
color&=3;
old^=color << (2*(3-(x&3)));
IO_Write(0x3d4,0x09);
if (IO_Read(0x3d5)==1) {
Bit16u off=(y>>1)*80+(x>>2);
if (y&1) off+=8*1024;
Bit8u old=real_readb(0xb800,off);
if (color & 0x80) {
color&=3;
old^=color << (2*(3-(x&3)));
} else {
old=old&cga_masks[x&3]|((color&3) << (2*(3-(x&3))));
}
real_writeb(0xb800,off,old);
} else {
old=old&cga_masks[x&3]|((color&3) << (2*(3-(x&3))));
Bit16u off=(y>>2)*160+((x>>2)&(~1));
off+=(8*1024) * (y & 3);
Bit16u old=real_readw(0xb800,off);
if (color & 0x80) {
old^=(color&1) << (7-(x&7));
old^=((color&2)>>1) << ((7-(x&7))+8);
} else {
old=old&(~(0x101<<(7-(x&7)))) | ((color&1) << (7-(x&7))) | (((color&2)>>1) << ((7-(x&7))+8));
}
real_writew(0xb800,off,old);
}
real_writeb(0xb800,off,old);
}
break;
case M_CGA2:
@ -56,8 +72,10 @@ void INT10_PutPixel(Bit16u x,Bit16u y,Bit8u page,Bit8u color) {
break;
case M_TANDY16:
{
Bit16u off=(y>>2)*160+(x>>1);
off+=(8*1024) * (y & 3);
IO_Write(0x3d4,0x09);
Bit8u scanlines_m1=IO_Read(0x3d5);
Bit16u off=(y>>((scanlines_m1==1)?1:2))*(CurMode->swidth>>1)+(x>>1);
off+=(8*1024) * (y & scanlines_m1);
Bit8u old=real_readb(0xb800,off);
Bit8u p[2];
p[1] = (old >> 4) & 0xf;