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Fix Ying Xiong Chuan Qi

This commit is contained in:
adelikat 2016-09-19 13:15:54 -04:00
parent 2a64a17cf1
commit 62aa81cc31
1 changed files with 30 additions and 15 deletions
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45
BizHawk.Emulation.Cores/Consoles/Nintendo/NES/Boards/MMC3_family/Mapper074.cs
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@ -20,8 +20,8 @@ namespace BizHawk.Emulation.Cores.Nintendo.NES
return false;
}
VRAM = new byte[2048];
if (Cart.chr_size == 0)
throw new Exception("Mapper074 carts MUST have chr rom!");
//if (Cart.chr_size == 0)
// throw new Exception("Mapper074 carts MUST have chr rom!");
BaseSetup();
return true;
}
@ -39,6 +39,13 @@ namespace BizHawk.Emulation.Cores.Nintendo.NES
{
VRAM[(addr & 0x03FF) + 0x400] = value;
}
// Ying Kiong Chuan Qi, no VROM
// Nestopia maps this to mapper 224, perhaps we should do the same instead of attempt to account for this scenario here
else
{
addr = MapCHR(addr);
VRAM[addr] = value;
}
}
else
{
@ -51,19 +58,27 @@ namespace BizHawk.Emulation.Cores.Nintendo.NES
if (addr < 0x2000)
{
int bank = Get_CHRBank_1K(addr);
if (bank == 0x08)
{
return VRAM[addr & 0x03FF];
}
else if (bank == 0x09)
{
return VRAM[(addr & 0x03FF) + 0x400];
}
else
{
addr = MapCHR(addr);
return VROM[addr];
}
if (bank == 0x08)
{
return VRAM[addr & 0x03FF];
}
else if (bank == 0x09)
{
return VRAM[(addr & 0x03FF) + 0x400];
}
else
{
addr = MapCHR(addr);
// Ying Kiong Chuan Qi, no VROM
// Nestopia maps this to mapper 224, perhaps we should do the same instead of attempt to account for this scenario here
if (VROM == null)
{
return VRAM[addr];
}
return VROM[addr];
}
}
else return base.ReadPPU(addr);
}