diff --git a/BizHawk.Emulation.Cores/BizHawk.Emulation.Cores.csproj b/BizHawk.Emulation.Cores/BizHawk.Emulation.Cores.csproj
index c7dff568f1..58dd4df88e 100644
--- a/BizHawk.Emulation.Cores/BizHawk.Emulation.Cores.csproj
+++ b/BizHawk.Emulation.Cores/BizHawk.Emulation.Cores.csproj
@@ -775,6 +775,7 @@
     <Compile Include="Consoles\Nintendo\NES\Boards\UNIF\UNIF_UNL-EDU2000.cs" />
     <Compile Include="Consoles\Nintendo\NES\Boards\UNIF\UNIF_UNL-KOF97.cs" />
     <Compile Include="Consoles\Nintendo\NES\Boards\UNIF\UNIF_UNL-KS7012.cs" />
+    <Compile Include="Consoles\Nintendo\NES\Boards\UNIF\UNIF_UNL-KS7013B.cs" />
     <Compile Include="Consoles\Nintendo\NES\Boards\UNIF\UNIF_UNL-SHERO.cs" />
     <Compile Include="Consoles\Nintendo\NES\Boards\UNIF\UNIF_UNL-TF1201.cs" />
     <Compile Include="Consoles\Nintendo\NES\Boards\UNIF\UNIF_UNL_DripGame.cs" />
diff --git a/BizHawk.Emulation.Cores/Consoles/Nintendo/NES/Boards/UNIF/UNIF_UNL-KS7013B.cs b/BizHawk.Emulation.Cores/Consoles/Nintendo/NES/Boards/UNIF/UNIF_UNL-KS7013B.cs
new file mode 100644
index 0000000000..43550ef399
--- /dev/null
+++ b/BizHawk.Emulation.Cores/Consoles/Nintendo/NES/Boards/UNIF/UNIF_UNL-KS7013B.cs
@@ -0,0 +1,52 @@
+using BizHawk.Common;
+using BizHawk.Common.NumberExtensions;
+
+namespace BizHawk.Emulation.Cores.Nintendo.NES
+{
+	public sealed class UNIF_UNL_KS7013B : NES.NESBoardBase
+	{
+		private byte reg;
+		private int prg_mask_16k;
+
+		public override bool Configure(NES.EDetectionOrigin origin)
+		{
+			switch (Cart.board_type)
+			{
+				case "UNIF_UNL-KS7013B":
+					break;
+				default:
+					return false;
+			}
+
+			prg_mask_16k = Cart.prg_size / 16 - 1;
+
+			return true;
+		}
+
+		public override void SyncState(Serializer ser)
+		{
+			ser.Sync("reg", ref reg);
+			base.SyncState(ser);
+		}
+
+		public override void WriteWRAM(int addr, byte value)
+		{
+			reg = value;
+		}
+
+		public override void WritePRG(int addr, byte value)
+		{
+			SetMirrorType(value.Bit(0) ? EMirrorType.Horizontal : EMirrorType.Vertical);
+		}
+
+		public override byte ReadPRG(int addr)
+		{
+			if (addr < 0x4000)
+			{
+				return ROM[((reg & prg_mask_16k) << 14) + (addr & 0x3FFF)];
+			}
+
+			return ROM[(prg_mask_16k << 14) + (addr & 0x3FFF)];
+		}
+	}
+}