diff --git a/BizHawk.Client.Common/BizHawk.Client.Common.csproj b/BizHawk.Client.Common/BizHawk.Client.Common.csproj
index d3766ece21..04447545af 100644
--- a/BizHawk.Client.Common/BizHawk.Client.Common.csproj
+++ b/BizHawk.Client.Common/BizHawk.Client.Common.csproj
@@ -129,6 +129,7 @@
     <Compile Include="lua\EmuLuaLibrary.Emu.cs" />
     <Compile Include="lua\EmuLuaLibrary.Events.cs" />
     <Compile Include="lua\EmuLuaLibrary.GameInfo.cs" />
+    <Compile Include="lua\EmuLuaLibrary.Genesis.cs" />
     <Compile Include="lua\EmuLuaLibrary.Joypad.cs" />
     <Compile Include="lua\EmuLuaLibrary.MainMemory.cs" />
     <Compile Include="lua\EmuLuaLibrary.Memory.cs" />
diff --git a/BizHawk.Client.Common/lua/EmuLuaLibrary.Genesis.cs b/BizHawk.Client.Common/lua/EmuLuaLibrary.Genesis.cs
new file mode 100644
index 0000000000..939d4edd5b
--- /dev/null
+++ b/BizHawk.Client.Common/lua/EmuLuaLibrary.Genesis.cs
@@ -0,0 +1,101 @@
+using System.ComponentModel;
+using BizHawk.Emulation.Common;
+using BizHawk.Emulation.Cores.Consoles.Sega.gpgx;
+using LuaInterface;
+using System;
+
+namespace BizHawk.Client.Common
+{
+	[Description("Functions specific to GenesisHawk (functions may not run when an Genesis game is not loaded)")]
+	public sealed class GenesisLuaLibrary : LuaLibraryBase
+	{
+		[OptionalService]
+		private GPGX Genesis { get; set; }
+
+		public GenesisLuaLibrary(Lua lua)
+			: base(lua) { }
+
+		public GenesisLuaLibrary(Lua lua, Action<string> logOutputCallback)
+			: base(lua, logOutputCallback) { }
+
+		public override string Name { get { return "genesis"; } }
+
+		private GPGX.GPGXSettings GetSettings()
+		{
+			if (Genesis != null)
+			{
+				return Genesis.GetSettings();
+			}
+
+			return new GPGX.GPGXSettings();
+		}
+
+		private void PutSettings(GPGX.GPGXSettings settings)
+		{
+			if (Genesis != null)
+			{
+				Genesis.PutSettings(settings);
+			}
+		}
+
+		[LuaMethodAttributes(
+			"getlayer_bga",
+			"Returns whether the bg layer A is displayed"
+		)]
+		public bool GetLayerBgA()
+		{
+			return GetSettings().DrawBGA;
+		}
+
+		[LuaMethodAttributes(
+			"getlayer_bgb",
+			"Returns whether the bg layer B is displayed"
+		)]
+		public bool GetLayerBgB()
+		{
+			return GetSettings().DrawBGB;
+		}
+
+		[LuaMethodAttributes(
+			"getlayer_bgw",
+			"Returns whether the bg layer W is displayed"
+		)]
+		public bool GetLayerBgW()
+		{
+			return GetSettings().DrawBGW;
+		}
+
+		[LuaMethodAttributes(
+			"setlayer_bga",
+			"Sets whether the bg layer A is displayed"
+		)]
+		public void SetLayerBgA(bool value)
+		{
+			var s = GetSettings();
+			s.DrawBGA = value;
+			PutSettings(s);
+		}
+
+		[LuaMethodAttributes(
+			"setlayer_bgb",
+			"Sets whether the bg layer B is displayed"
+		)]
+		public void SetLayerBgB(bool value)
+		{
+			var s = GetSettings();
+			s.DrawBGB = value;
+			PutSettings(s);
+		}
+
+		[LuaMethodAttributes(
+			"setlayer_bgw",
+			"Sets whether the bg layer W is displayed"
+		)]
+		public void SetLayerBgW(bool value)
+		{
+			var s = GetSettings();
+			s.DrawBGW = value;
+			PutSettings(s);
+		}
+	}
+}