diff --git a/BizHawk.Emulation.Cores/BizHawk.Emulation.Cores.csproj b/BizHawk.Emulation.Cores/BizHawk.Emulation.Cores.csproj
index c2537cbf19..0bea725b3a 100644
--- a/BizHawk.Emulation.Cores/BizHawk.Emulation.Cores.csproj
+++ b/BizHawk.Emulation.Cores/BizHawk.Emulation.Cores.csproj
@@ -691,6 +691,7 @@
     <Compile Include="Consoles\Nintendo\NES\Boards\MMC3_family\Mapper199.cs" />
     <Compile Include="Consoles\Nintendo\NES\Boards\MMC3_family\Mapper205.cs" />
     <Compile Include="Consoles\Nintendo\NES\Boards\MMC3_family\Mapper208.cs" />
+    <Compile Include="Consoles\Nintendo\NES\Boards\MMC3_family\Mapper215.cs" />
     <Compile Include="Consoles\Nintendo\NES\Boards\MMC3_family\Mapper219.cs" />
     <Compile Include="Consoles\Nintendo\NES\Boards\MMC3_family\Mapper238.cs" />
     <Compile Include="Consoles\Nintendo\NES\Boards\MMC3_family\Mapper245.cs" />
diff --git a/BizHawk.Emulation.Cores/Consoles/Nintendo/NES/Boards/MMC3_family/Mapper215.cs b/BizHawk.Emulation.Cores/Consoles/Nintendo/NES/Boards/MMC3_family/Mapper215.cs
new file mode 100644
index 0000000000..6ee7e50519
--- /dev/null
+++ b/BizHawk.Emulation.Cores/Consoles/Nintendo/NES/Boards/MMC3_family/Mapper215.cs
@@ -0,0 +1,136 @@
+using BizHawk.Common;
+
+namespace BizHawk.Emulation.Cores.Nintendo.NES
+{
+	public class Mapper215 : MMC3Board_Base
+	{
+		private ByteBuffer exRegs = new ByteBuffer(4);
+		private byte cmd;
+
+		private int prg_mask_32k;
+
+		private readonly byte[,] regperm = new byte[,]
+		{
+			{ 0, 1, 2, 3, 4, 5, 6, 7 },
+			{ 0, 2, 6, 1, 7, 3, 4, 5 },
+			{ 0, 5, 4, 1, 7, 2, 6, 3 },   // unused
+			{ 0, 6, 3, 7, 5, 2, 4, 1 },
+			{ 0, 2, 5, 3, 6, 1, 7, 4 },
+			{ 0, 1, 2, 3, 4, 5, 6, 7 },   // empty
+			{ 0, 1, 2, 3, 4, 5, 6, 7 },   // empty
+			{ 0, 1, 2, 3, 4, 5, 6, 7 },   // empty
+		};
+
+		private readonly byte[,] adrperm = new byte[,]
+		{
+			{ 0, 1, 2, 3, 4, 5, 6, 7 },
+			{ 3, 2, 0, 4, 1, 5, 6, 7 },
+			{ 0, 1, 2, 3, 4, 5, 6, 7 },   // unused
+			{ 5, 0, 1, 2, 3, 7, 6, 4 },
+			{ 3, 1, 0, 5, 2, 4, 6, 7 },
+			{ 0, 1, 2, 3, 4, 5, 6, 7 },   // empty
+			{ 0, 1, 2, 3, 4, 5, 6, 7 },   // empty
+			{ 0, 1, 2, 3, 4, 5, 6, 7 },   // empty
+		};
+
+		public override bool Configure(NES.EDetectionOrigin origin)
+		{
+			switch (Cart.board_type)
+			{
+				case "MAPPER215":
+					break;
+				default:
+					return false;
+			}
+
+			BaseSetup();
+			exRegs[1] = 3;
+
+			prg_mask_32k = Cart.prg_size / 32 - 1;
+			return true;
+		}
+
+		public override void SyncState(Serializer ser)
+		{
+			base.SyncState(ser);
+			ser.Sync("exRegs", ref exRegs);
+			ser.Sync("cmd", ref cmd);
+		}
+
+		public override void WriteEXP(int addr, byte value)
+		{
+			if (addr == 0x1000) { exRegs[0] = value; }
+			if (addr == 0x1001) { exRegs[1] = value; }
+			if (addr == 0x1007) { exRegs[2] = value; }
+
+			base.WriteEXP(addr, value);
+		}
+
+		//public override void WritePRG(int addr, byte value)
+		//{
+		//	cmd = value;
+		//	int addr2 = addr + 0x8000;
+		//	byte dat = value;
+
+		//	var b = exRegs[2];
+
+		//	byte adr = (byte)( adrperm[exRegs[2], ((addr2 >> 12) & 6) | (addr2 & 1)]);
+		//	short addr3 = (short)((adr & 1) | ((adr & 6) << 12) | 0x8000);
+		//	if (adr < 4)
+		//	{
+		//		if (adr == 0)
+		//		{
+		//			dat = (byte)((dat & 0xC0) | (regperm[exRegs[2], dat & 7]));
+		//		}
+				
+		//	}
+
+		//	base.WritePRG(addr, dat);
+		//}
+
+		public override byte ReadPRG(int addr)
+		{
+			if ((exRegs[0] & 0x40) > 0)
+			{
+				byte sbank = (byte)(exRegs[1] & 0x10);
+				if ((exRegs[0] & 0x80) > 0)
+				{
+					byte bank =(byte)(((exRegs[1] & 3) << 4) | (exRegs[0] & 0x7) | (sbank >> 1));
+					if ((exRegs[0] & 0x20) > 0)
+					{
+						return ROM[(bank << 15) + addr];
+					}
+					else
+					{
+						return ROM[(bank << 14) + (addr & 0x3FFF)];
+					}
+				}
+				else
+				{
+					return ROM[(((exRegs[1] & 3) << 5) | (cmd & 0x0F) | sbank) + addr];
+				}
+			}
+			else
+			{
+				if ((exRegs[0] & 0x80) > 0)
+				{
+					byte bank = (byte)(((exRegs[1] & 3) << 4) | (exRegs[0] & 0xF));
+					if ((exRegs[0] & 0x20) > 0)
+					{
+						return ROM[((bank >> 1) << 15) + addr];
+					}
+					else
+					{
+						return ROM[(bank << 14) + (addr & 0x3FFF)];
+					}
+				}
+				else
+				{
+					int bank32k = (((exRegs[1] & 3) << 5) | (cmd & 0x1F));
+					bank32k &= prg_mask_32k;
+					return ROM[(bank32k << 15) + addr];
+				}
+			}
+		}
+	}
+}