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* start GPU shit: draw BG0 16-color.

Browse Source 
* fix a few DMA bugs.
* fix a bug where some code could still run right after a halt instruction.
* fix VRAM mapping, too. I'm an idiot.
This commit is contained in:
StapleButter
2017-01-18 17:57:12 +01:00
parent d30e6956fa
commit d7c1d2a2cd
10 changed files with 244 additions and 65 deletions
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24
GPU.cpp
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@ -108,7 +108,7 @@ void Reset()
GPU2D_A->Reset();
GPU2D_B->Reset();
GPU2D_A->SetFramebuffer(&Framebuffer[0*192]);
GPU2D_A->SetFramebuffer(&Framebuffer[256*0]);
GPU2D_B->SetFramebuffer(&Framebuffer[256*192]);
}
@ -682,24 +682,6 @@ void MapVRAM_I(u32 bank, u8 cnt)
}
void DrawScanline(u32 screen, u32 line)
{
u16* dst = &Framebuffer[256 * ((192*screen) + line)];
if (screen==0)
{
u16* src = &((u16*)VRAM_A)[256*line];
for (int i = 0; i < 256; i++)
dst[i] = src[i];
}
else
{
for (int i = 0; i < 256; i++)
dst[i] = 0x7FFF;
}
}
void StartFrame()
{
StartScanline(0);
@ -730,8 +712,8 @@ void StartScanline(u32 line)
if (line < 192)
{
// draw
DrawScanline(0, line);
DrawScanline(1, line);
GPU2D_A->DrawScanline(line);
GPU2D_B->DrawScanline(line);
NDS::ScheduleEvent(LINE_CYCLES, StartScanline, line+1);
}