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NESHawk - implement mapper 53 (multicart junk)

This commit is contained in:
adelikat 2015-08-30 09:41:41 -04:00
parent 80dd120b9d
commit 724c4b748b
2 changed files with 85 additions and 0 deletions
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1
BizHawk.Emulation.Cores/BizHawk.Emulation.Cores.csproj
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@ -521,6 +521,7 @@
<Compile Include="Consoles\Nintendo\NES\Boards\Mapper042.cs" />
<Compile Include="Consoles\Nintendo\NES\Boards\Mapper045.cs" />
<Compile Include="Consoles\Nintendo\NES\Boards\Mapper051.cs" />
<Compile Include="Consoles\Nintendo\NES\Boards\Mapper053.cs" />
<Compile Include="Consoles\Nintendo\NES\Boards\Mapper057.cs" />
<Compile Include="Consoles\Nintendo\NES\Boards\Mapper058.cs" />
<Compile Include="Consoles\Nintendo\NES\Boards\Mapper069.cs" />

84
BizHawk.Emulation.Cores/Consoles/Nintendo/NES/Boards/Mapper053.cs Normal file
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@ -0,0 +1,84 @@
using BizHawk.Common;
using BizHawk.Common.NumberExtensions;
namespace BizHawk.Emulation.Cores.Nintendo.NES
{
public sealed class Mapper053 : NES.NESBoardBase
{
private byte _reg0;
private byte _reg1;
private bool Prg16kMode { get { return _reg0.Bit(4); } }
public override bool Configure(NES.EDetectionOrigin origin)
{
switch (Cart.board_type)
{
case "MAPPER053":
break;
// TODO
//case "UNIF_BMC-Supervision16in1":
// break;
default:
return false;
}
SetMirrorType(Cart.pad_h, Cart.pad_v);
return true;
}
public override void SyncState(Serializer ser)
{
base.SyncState(ser);
ser.Sync("reg0", ref _reg0);
ser.Sync("reg1", ref _reg1);
}
private void SetMirroring()
{
bool mir = _reg0.Bit(5);
SetMirrorType(mir ? EMirrorType.Horizontal : EMirrorType.Vertical);
}
public override void WriteWRAM(int addr, byte value)
{
if (!_reg0.Bit(4))
{
_reg0 = value;
SetMirroring();
}
else
{
base.WriteWRAM(addr, value);
}
}
public override void WritePRG(int addr, byte value)
{
_reg1 = value;
}
public override byte ReadPRG(int addr)
{
if (Prg16kMode)
{
// First 32kb of PRG is for the intro game picker, 2 is to offset that
int bank = addr < 0x4000
? (((_reg0 & 0xF) << 3) | (_reg1 & 7)) + 2
: (((_reg0 & 0xF) << 3) | 7) + 2;
return ROM[(bank * 0x4000) + (addr & 0x3FFF)];
}
return base.ReadPRG(addr);
}
public override byte ReadWRAM(int addr)
{
// First 32kb of PRG is for the intro game picker, 4 is to offset that
int bank = (((_reg0 & 0xF) << 4) | 0xF) + 4;
return ROM[(bank * 0x2000) + (addr & 0x1FFF)];
}
}
}