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* fix VRAM address calculation for GPU A

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* add support for mode 5
This commit is contained in:
StapleButter
2017-01-31 15:43:22 +01:00
parent 12ebf83665
commit c3e2f7ad9b
3 changed files with 47 additions and 15 deletions
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48
GPU2D.cpp
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@ -171,6 +171,9 @@ void GPU2D::DrawScanline(u32 line)
}
}
// temp. hax
#define DrawBG_Text DrawBG_Text_4bpp
void GPU2D::DrawScanline_Mode1(u32 line, u16* dst)
{
u32 backdrop;
@ -191,32 +194,61 @@ void GPU2D::DrawScanline_Mode1(u32 line, u16* dst)
switch (DispCnt & 0x7)
{
case 0:
//printf("disp %08X %04X %04X %04X %04X\n", DispCnt, BGCnt[0], BGCnt[1], BGCnt[2], BGCnt[3]);
for (int i = 3; i >= 0; i--)
{
if ((BGCnt[3] & 0x3) == i)
{
if (DispCnt & 0x0800) DrawBG_Text_4bpp(line, dst, 3);
if (DispCnt & 0x0800) DrawBG_Text(line, dst, 3);
if (DispCnt & 0x1000) InterleaveSprites(spritebuf, 0x38000, dst);
}
if ((BGCnt[2] & 0x3) == i)
{
if (DispCnt & 0x0400) DrawBG_Text_4bpp(line, dst, 2);
if (DispCnt & 0x0400) DrawBG_Text(line, dst, 2);
if (DispCnt & 0x1000) InterleaveSprites(spritebuf, 0x28000, dst);
}
if ((BGCnt[1] & 0x3) == i)
{
if (DispCnt & 0x0200) DrawBG_Text_4bpp(line, dst, 1);
if (DispCnt & 0x0200) DrawBG_Text(line, dst, 1);
if (DispCnt & 0x1000) InterleaveSprites(spritebuf, 0x18000, dst);
}
if ((BGCnt[0] & 0x3) == i)
{
if (DispCnt & 0x0100) DrawBG_Text_4bpp(line, dst, 0);
if (DispCnt & 0x0100) DrawBG_Text(line, dst, 0);
if (DispCnt & 0x1000) InterleaveSprites(spritebuf, 0x08000, dst);
}
}
break;
case 5:
for (int i = 3; i >= 0; i--)
{
if ((BGCnt[3] & 0x3) == i)
{
// ext. todo
if (DispCnt & 0x1000) InterleaveSprites(spritebuf, 0x38000, dst);
}
if ((BGCnt[2] & 0x3) == i)
{
// ext. todo
if (DispCnt & 0x1000) InterleaveSprites(spritebuf, 0x28000, dst);
}
if ((BGCnt[1] & 0x3) == i)
{
if (DispCnt & 0x0200) DrawBG_Text(line, dst, 1);
if (DispCnt & 0x1000) InterleaveSprites(spritebuf, 0x18000, dst);
}
if ((BGCnt[0] & 0x3) == i)
{
if (DispCnt & 0x0100) DrawBG_Text(line, dst, 0);
if (DispCnt & 0x1000) InterleaveSprites(spritebuf, 0x08000, dst);
}
}
break;
}
// debug crap
//for (int i = 0; i < 256; i++)
// dst[i] = *(u16*)&GPU::Palette[Num*0x400 + (i>>4)*2 + (line>>4)*32];
}
// char 06218000
@ -247,7 +279,7 @@ void GPU2D::DrawBG_Text_4bpp(u32 line, u16* dst, u32 bgnum)
else
{
tileset = (u8*)GPU::VRAM_ABG[((DispCnt & 0x07000000) >> 22) + ((bgcnt & 0x003C) >> 2)];
tilemap = (u16*)GPU::VRAM_ABG[((DispCnt & 0x38000000) >> 27) + ((bgcnt & 0x1800) >> 11)];
tilemap = (u16*)GPU::VRAM_ABG[((DispCnt & 0x38000000) >> 25) + ((bgcnt & 0x1800) >> 11)];
if (!tileset || !tilemap) return;
tilemap += ((bgcnt & 0x0700) << 2);
@ -299,9 +331,7 @@ void GPU2D::DrawBG_Text_4bpp(u32 line, u16* dst, u32 bgnum)
{
color = *pixels & 0x0F;
}
//color = (i >> 4) + ((line >> 4) << 4);
//if (Num) color = 0;
//if (yoff>127) color=0;
if (color)
dst[i] = curpal[color];