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NesHawk - support Mapper 220

This commit is contained in:
adelikat 2016-10-28 17:49:36 -05:00
parent b9f4d20de9
commit dbc5f54d03
2 changed files with 99 additions and 0 deletions
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1
BizHawk.Emulation.Cores/BizHawk.Emulation.Cores.csproj
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@ -643,6 +643,7 @@
<Compile Include="Consoles\Nintendo\NES\Boards\Mapper213.cs" />
<Compile Include="Consoles\Nintendo\NES\Boards\Mapper214.cs" />
<Compile Include="Consoles\Nintendo\NES\Boards\Mapper218.cs" />
<Compile Include="Consoles\Nintendo\NES\Boards\Mapper220.cs" />
<Compile Include="Consoles\Nintendo\NES\Boards\Mapper221.cs" />
<Compile Include="Consoles\Nintendo\NES\Boards\Mapper222.cs" />
<Compile Include="Consoles\Nintendo\NES\Boards\Mapper225.cs" />

98
BizHawk.Emulation.Cores/Consoles/Nintendo/NES/Boards/Mapper220.cs Normal file
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@ -0,0 +1,98 @@
using BizHawk.Common;
using BizHawk.Common.NumberExtensions;
namespace BizHawk.Emulation.Cores.Nintendo.NES
{
// Ported from FCEUX
public sealed class Mapper220 : NES.NESBoardBase
{
private ByteBuffer reg = new ByteBuffer(8);
private int prg_mask_2k;
public override bool Configure(NES.EDetectionOrigin origin)
{
switch (Cart.board_type)
{
case "UNIF_UNL-KS7057":
case "MAPPER220":
break;
default:
return false;
}
prg_mask_2k = Cart.prg_size / 2 - 1;
return true;
}
public override void Dispose()
{
reg.Dispose();
base.Dispose();
}
public override void SyncState(Serializer ser)
{
ser.Sync("reg", ref reg);
base.SyncState(ser);
}
public override void WritePRG(int addr, byte value)
{
addr += 0x8000;
switch (addr & 0xF003)
{
case 0x8000:
case 0x8001:
case 0x8002:
case 0x8003:
case 0x9000:
case 0x9001:
case 0x9002:
case 0x9003:
SetMirrorType(value.Bit(0) ? EMirrorType.Vertical : EMirrorType.Horizontal);
break;
case 0xB000: reg[0] = (byte)((reg[0] & 0xF0) | (value & 0x0F)); break;
case 0xB001: reg[0] = (byte)((reg[0] & 0x0F) | (value << 4)); break;
case 0xB002: reg[1] = (byte)((reg[1] & 0xF0) | (value & 0x0F)); break;
case 0xB003: reg[1] = (byte)((reg[1] & 0x0F) | (value << 4)); break;
case 0xC000: reg[2] = (byte)((reg[2] & 0xF0) | (value & 0x0F)); break;
case 0xC001: reg[2] = (byte)((reg[2] & 0x0F) | (value << 4)); break;
case 0xC002: reg[3] = (byte)((reg[3] & 0xF0) | (value & 0x0F)); break;
case 0xC003: reg[3] = (byte)((reg[3] & 0x0F) | (value << 4)); break;
case 0xD000: reg[4] = (byte)((reg[4] & 0xF0) | (value & 0x0F)); break;
case 0xD001: reg[4] = (byte)((reg[4] & 0x0F) | (value << 4)); break;
case 0xD002: reg[5] = (byte)((reg[5] & 0xF0) | (value & 0x0F)); break;
case 0xD003: reg[5] = (byte)((reg[5] & 0x0F) | (value << 4)); break;
case 0xE000: reg[6] = (byte)((reg[6] & 0xF0) | (value & 0x0F)); break;
case 0xE001: reg[6] = (byte)((reg[6] & 0x0F) | (value << 4)); break;
case 0xE002: reg[7] = (byte)((reg[7] & 0xF0) | (value & 0x0F)); break;
case 0xE003: reg[7] = (byte)((reg[7] & 0x0F) | (value << 4)); break;
}
}
public override byte ReadWRAM(int addr)
{
int i = ((addr >> 11) & 3) + 4;
int bank = reg[i] & prg_mask_2k;
return ROM[(bank << 11) + (addr & 0x7FF)];
}
public override byte ReadPRG(int addr)
{
if (addr < 0x2000)
{
int i = (addr >> 11) & 3;
int bank = reg[i] & prg_mask_2k;
return ROM[(bank << 11) + (addr & 0x7FF)];
}
else if (addr < 0x4000)
{
return ROM[0x1A000 /* bank 0xd*/ + (addr & 0x1FFF)];
}
else
{
return ROM[0x1C000 /* bank 7*/ + (addr & 0x3FFF)];
}
}
}
}