empathicqubit/Mesen-X
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Added Screen A/B only mirroring support

Browse source
This commit is contained in:
Souryo 2014-06-24 12:40:30 -04:00
parent ad2c603659
commit e83e5a7595
1 changed files with 21 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

21
Core/MemoryManager.cpp
View file

@ -165,6 +165,27 @@ void MemoryManager::WriteVRAM(uint16_t addr, uint8_t value)
}
break;
case MirroringType::ScreenAOnly:
case MirroringType::ScreenBOnly:
if(addr >= 0x2000 && addr < 0x2400) {
_videoRAM[addr + 0x400] = value;
_videoRAM[addr + 0x800] = value;
_videoRAM[addr + 0xC00] = value;
} else if(addr >= 0x2400 && addr < 0x2800) {
_videoRAM[addr - 0x400] = value;
_videoRAM[addr + 0x400] = value;
_videoRAM[addr + 0x800] = value;
} else if(addr >= 0x2800 && addr < 0x2C00) {
_videoRAM[addr + 0x400] = value;
_videoRAM[addr - 0x400] = value;
_videoRAM[addr - 0x800] = value;
} else if(addr >= 0x2C00 && addr < 0x3000) {
_videoRAM[addr - 0x400] = value;
_videoRAM[addr - 0x800] = value;
_videoRAM[addr - 0xC00] = value;
}
break;
default:
throw exception("Not implemented yet");
}