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Update for VS Castlevania

This commit is contained in:
alyosha-tas 2016-10-30 19:31:41 -04:00 committed by GitHub
parent a28e016cbb
commit b6a786d5a2
1 changed files with 45 additions and 3 deletions
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48
BizHawk.Emulation.Cores/Consoles/Nintendo/NES/Boards/UxROM.cs
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@ -26,6 +26,10 @@ namespace BizHawk.Emulation.Cores.Nintendo.NES
//state
int prg;
//the VS actually does have 2 KB of nametable address space
//let's make the extra space here, instead of in the main NES to avoid confusion
byte[] CIRAM_VS = new byte[0x800];
public override bool Configure(NES.EDetectionOrigin origin)
{
adjust_prg = (x) => x;
@ -58,7 +62,9 @@ namespace BizHawk.Emulation.Cores.Nintendo.NES
case "JALECO-JF-18":
AssertPrg(256); AssertChr(0); AssertVram(8); AssertWram(0);
break;
case "NES-UNROM_VS":
NES._isVS = true;
break;
default:
return false;
}
@ -88,7 +94,23 @@ namespace BizHawk.Emulation.Cores.Nintendo.NES
{
return VRAM[addr & vram_byte_mask];
}
else return base.ReadPPU(addr);
else
{
if (NES._isVS)
{
addr = addr - 0x2000;
if (addr < 0x800)
{
return NES.CIRAM[addr];
}
else
{
return CIRAM_VS[addr - 0x800];
}
}
else
return base.ReadPPU(addr);
}
}
public override void WritePPU(int addr, byte value)
@ -97,13 +119,33 @@ namespace BizHawk.Emulation.Cores.Nintendo.NES
{
VRAM[addr & vram_byte_mask] = value;
}
else base.WritePPU(addr,value);
else if (NES._isVS)
{
// The game VS Castlevania apparently scans for more CIRAM then actually exists, so we have to mask out nonsensical values
addr &= 0x2FFF;
addr = addr - 0x2000;
if (addr < 0x800)
{
NES.CIRAM[addr] = value;
}
else
{
CIRAM_VS[addr - 0x800] = value;
}
}
else
base.WritePPU(addr,value);
}
public override void SyncState(Serializer ser)
{
base.SyncState(ser);
ser.Sync("prg", ref prg);
if (NES.IsVS)
ser.Sync("VS_CIRAM", ref CIRAM_VS, false);
}
}
}