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PPU: MSB of CGRAM entries is 7 bits only

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Sour 2019-03-10 23:18:47 -04:00
parent 9188baf7f1
commit 82834a1753
1 changed files with 6 additions and 1 deletions
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7
Core/Ppu.cpp
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@ -1479,7 +1479,12 @@ void Ppu::Write(uint32_t addr, uint8_t value)
//CGRAM Data write (CGDATA)
_console->ProcessPpuWrite(_cgramAddress, value, SnesMemoryType::CGRam);
_cgram[_cgramAddress] = value;
if(_cgramAddress & 0x01) {
//MSB ignores the 7th bit (colors are 15-bit only)
_cgram[_cgramAddress] = value & 0x7F;
} else {
_cgram[_cgramAddress] = value;
}
_cgramAddress = (_cgramAddress + 1) & (Ppu::CgRamSize - 1);
break;