diff --git a/BizHawk.Emulation/Consoles/Atari/2600/Mappers/mE0.cs b/BizHawk.Emulation/Consoles/Atari/2600/Mappers/mE0.cs
index 099a7a3449..7c983d4a31 100644
--- a/BizHawk.Emulation/Consoles/Atari/2600/Mappers/mE0.cs
+++ b/BizHawk.Emulation/Consoles/Atari/2600/Mappers/mE0.cs
@@ -10,7 +10,6 @@ namespace BizHawk.Emulation.Consoles.Atari._2600
 		int toggle1 = 0;
 		int toggle2 = 0;
 		int toggle3 = 0;
-		int toggle4 = 0;
 		
 		public override byte ReadMemory(ushort addr)
 		{
@@ -34,7 +33,6 @@ namespace BizHawk.Emulation.Consoles.Atari._2600
 			ser.Sync("toggle1", ref toggle1);
 			ser.Sync("toggle2", ref toggle2);
 			ser.Sync("toggle3", ref toggle3);
-			ser.Sync("toggle4", ref toggle4);
 		}
 
 		void Address(ushort addr)
@@ -67,53 +65,53 @@ namespace BizHawk.Emulation.Consoles.Atari._2600
 					break;
 
 				case 0x1FE8:
-					toggle1 = 0;
+					toggle2 = 0;
 					break;
 				case 0x1FE9:
-					toggle1 = 1;
+					toggle2 = 1;
 					break;
 				case 0x1FEA:
-					toggle1 = 2;
+					toggle2 = 2;
 					break;
 				case 0x1FEB:
-					toggle1 = 3;
+					toggle2 = 3;
 					break;
 				case 0x1FEC:
-					toggle1 = 4;
+					toggle2 = 4;
 					break;
 				case 0x1FED:
-					toggle1 = 5;
+					toggle2 = 5;
 					break;
 				case 0x1FEE:
-					toggle1 = 6;
+					toggle2 = 6;
 					break;
 				case 0x1FEF:
-					toggle1 = 7;
+					toggle2 = 7;
 					break;
 
 				case 0x1FF0:
-					toggle1 = 0;
+					toggle3 = 0;
 					break;
 				case 0x1FF1:
-					toggle1 = 1;
+					toggle3 = 1;
 					break;
 				case 0x1FF2:
-					toggle1 = 2;
+					toggle3 = 2;
 					break;
 				case 0x1FF3:
-					toggle1 = 3;
+					toggle3 = 3;
 					break;
 				case 0x1FF4:
-					toggle1 = 4;
+					toggle3 = 4;
 					break;
 				case 0x1FF5:
-					toggle1 = 5;
+					toggle3 = 5;
 					break;
 				case 0x1FF6:
-					toggle1 = 6;
+					toggle3 = 6;
 					break;
 				case 0x1FF7:
-					toggle1 = 7;
+					toggle3 = 7;
 					break;
 			}
 		}
diff --git a/BizHawk.Emulation/Consoles/Atari/2600/Mappers/mFA.cs b/BizHawk.Emulation/Consoles/Atari/2600/Mappers/mFA.cs
index a9a2805a5c..3ac83d5b9a 100644
--- a/BizHawk.Emulation/Consoles/Atari/2600/Mappers/mFA.cs
+++ b/BizHawk.Emulation/Consoles/Atari/2600/Mappers/mFA.cs
@@ -16,9 +16,11 @@ namespace BizHawk.Emulation.Consoles.Atari._2600
 	accessing 1FF8, 1FF9, and 1FFA.   There's also 256 bytes of RAM mapped into 1000-11FF.
 	The write port is at 1000-10FF, and the read port is 1100-11FF.
 	 */
+
 	class mFA : MapperBase 
 	{
 		int toggle = 0;
+		ByteBuffer aux_ram = new ByteBuffer(256);
 
 		public override byte ReadMemory(ushort addr)
 		{
@@ -26,23 +28,27 @@ namespace BizHawk.Emulation.Consoles.Atari._2600
 
 			if (addr < 0x1000) 
 				return base.ReadMemory(addr);
-			else if (addr < 0x10FF)
+			else if (addr < 0x1100)
  				return 0xFF;
-			else if (addr < 0x11FF)
-				return core.BaseReadMemory(addr);
+			else if (addr < 0x1200)
+				return aux_ram[addr & 0xFF];
 			else
-				return core.rom[toggle * 4 * 1024 + (addr & 0xFFF)];
+				return core.rom[(toggle * 4 * 1024) + (addr & 0xFFF)];
 		}
 		public override void WriteMemory(ushort addr, byte value)
 		{
 			Address(addr);
-			if (addr < 0x1000) base.WriteMemory(addr, value);
+			if (addr < 0x1000) 
+				base.WriteMemory(addr, value);
+			if (addr < 0x10FF) 
+				aux_ram[addr & 0xFF] = value;
 		}
 
 		public override void SyncState(Serializer ser)
 		{
 			base.SyncState(ser);
 			ser.Sync("toggle", ref toggle);
+			ser.Sync("ram", ref aux_ram);
 		}
 
 		void Address(ushort addr)