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implement some obscure DMA types

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This commit is contained in:
StapleButter
2017-03-20 22:18:35 +01:00
parent a56bf5c76c
commit 2150240cbd
7 changed files with 76 additions and 14 deletions
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28
src/GPU2D.cpp
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@ -91,6 +91,8 @@ void GPU2D::Reset()
EVB = 0;
EVY = 0;
memset(DispFIFOBuffer, 0, 256*2);
CaptureCnt = 0;
MasterBrightness = 0;
@ -337,9 +339,17 @@ void GPU2D::DrawScanline(u32 line)
}
break;
case 3: // FIFO display
case 3: // FIFO display (grossly inaccurate)
{
// TODO
for (int i = 0; i < 256; i++)
{
u16 color = DispFIFOBuffer[i];
u8 r = (color & 0x001F) << 1;
u8 g = (color & 0x03E0) >> 4;
u8 b = (color & 0x7C00) >> 9;
dst[i] = r | (g << 8) | (b << 16);
}
}
break;
}
@ -445,7 +455,8 @@ void GPU2D::DoCapture(u32 line, u32 width, u32* src)
if (CaptureCnt & (1<<25))
{
// TODO: FIFO mode
srcB = &DispFIFOBuffer[0];
srcBaddr = 0;
}
else
{
@ -570,6 +581,17 @@ void GPU2D::DoCapture(u32 line, u32 width, u32* src)
}
}
void GPU2D::FIFODMA(u32 addr)
{
for (int i = 0; i < 256; i += 2)
{
u32 val = NDS::ARM9Read32(addr);
addr += 4;
DispFIFOBuffer[i] = val & 0xFFFF;
DispFIFOBuffer[i+1] = val >> 16;
}
}
void GPU2D::BGExtPalDirty(u32 base)
{