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Implement Mapper 244 (Decathlon)

This commit is contained in:
adelikat 2015-08-09 13:41:45 -04:00
parent f733e1e47b
commit ef656a9f5d
2 changed files with 79 additions and 0 deletions
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1
BizHawk.Emulation.Cores/BizHawk.Emulation.Cores.csproj
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@ -558,6 +558,7 @@
<Compile Include="Consoles\Nintendo\NES\Boards\Mapper078.cs" />
<Compile Include="Consoles\Nintendo\NES\Boards\Mapper046.cs" />
<Compile Include="Consoles\Nintendo\NES\Boards\Mapper243.cs" />
<Compile Include="Consoles\Nintendo\NES\Boards\Mapper244.cs" />
<Compile Include="Consoles\Nintendo\NES\Boards\Mapper246.cs" />
<Compile Include="Consoles\Nintendo\NES\Boards\Mapper50.cs" />
<Compile Include="Consoles\Nintendo\NES\Boards\Mapper60.cs" />

78
BizHawk.Emulation.Cores/Consoles/Nintendo/NES/Boards/Mapper244.cs Normal file
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@ -0,0 +1,78 @@
using System.Collections.Generic;
using BizHawk.Common;
namespace BizHawk.Emulation.Cores.Nintendo.NES
{
public class Mapper244 : NES.NESBoardBase
{
public override bool Configure(NES.EDetectionOrigin origin)
{
switch (Cart.board_type)
{
case "MAPPER244":
break;
default:
return false;
}
return true;
}
private List<List<byte>> prg_perm = new List<List<byte>>
{
new List<byte> { 0, 1, 2, 3, },
new List<byte> { 3, 2, 1, 0, },
new List<byte> { 0, 2, 1, 3, },
new List<byte> { 3, 1, 2, 0, },
};
private List<List<byte>> chr_perm = new List<List<byte>>
{
new List<byte> { 0, 1, 2, 3, 4, 5, 6, 7, },
new List<byte> { 0, 2, 1, 3, 4, 6, 5, 7, },
new List<byte> { 0, 1, 4, 5, 2, 3, 6, 7, },
new List<byte> { 0, 4, 1, 5, 2, 6, 3, 7, },
new List<byte> { 0, 4, 2, 6, 1, 5, 3, 7, },
new List<byte> { 0, 2, 4, 6, 1, 3, 5, 7, },
new List<byte> { 7, 6, 5, 4, 3, 2, 1, 0, },
new List<byte> { 7, 6, 5, 4, 3, 2, 1, 0, }
};
private int _chrRegister = 0;
private int _prgRegister = 0;
public override void SyncState(Serializer ser)
{
base.SyncState(ser);
ser.Sync("chrRegister", ref _chrRegister);
ser.Sync("prgRegister", ref _prgRegister);
}
public override byte ReadPPU(int addr)
{
if (addr < 0x2000)
{
return VROM[(_chrRegister * 0x2000) + (addr & 0x1FFF)];
}
return base.ReadPPU(addr);
}
public override byte ReadPRG(int addr)
{
return ROM[(_prgRegister * 0x8000) + (addr & 0x7FFF)];
}
public override void WritePRG(int addr, byte value)
{
if ((value & 0x08) > 0)
{
_chrRegister = chr_perm[(value >> 4) & 7][value & 7];
}
else
{
_prgRegister = prg_perm[(value >> 4) & 3][value & 3];
}
}
}
}