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keep the GPU from crashing if there's no VRAM mapped, I guess.

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noting that the way it's accessing VRAM is grossly inaccurate.
This commit is contained in:
StapleButter
2017-01-31 04:06:05 +01:00
parent 594286ee5d
commit 12ebf83665
3 changed files with 5 additions and 3 deletions
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2
GPU2D.cpp
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@ -239,6 +239,7 @@ void GPU2D::DrawBG_Text_4bpp(u32 line, u16* dst, u32 bgnum)
{
tileset = (u8*)GPU::VRAM_BBG[((bgcnt & 0x003C) >> 2)];
tilemap = (u16*)GPU::VRAM_BBG[((bgcnt & 0x1800) >> 11)];
if (!tileset || !tilemap) return;
tilemap += ((bgcnt & 0x0700) << 2);
pal = (u16*)&GPU::Palette[0x400];
@ -247,6 +248,7 @@ void GPU2D::DrawBG_Text_4bpp(u32 line, u16* dst, u32 bgnum)
{
tileset = (u8*)GPU::VRAM_ABG[((DispCnt & 0x07000000) >> 22) + ((bgcnt & 0x003C) >> 2)];
tilemap = (u16*)GPU::VRAM_ABG[((DispCnt & 0x38000000) >> 27) + ((bgcnt & 0x1800) >> 11)];
if (!tileset || !tilemap) return;
tilemap += ((bgcnt & 0x0700) << 2);
pal = (u16*)&GPU::Palette[0];