diff --git a/BizHawk.Emulation/BizHawk.Emulation.csproj b/BizHawk.Emulation/BizHawk.Emulation.csproj
index 1016721fcc..401420e121 100644
--- a/BizHawk.Emulation/BizHawk.Emulation.csproj
+++ b/BizHawk.Emulation/BizHawk.Emulation.csproj
@@ -126,6 +126,7 @@
     <Compile Include="Consoles\Nintendo\NES\Boards\MMC3_family\Mapper095.cs" />
     <Compile Include="Consoles\Nintendo\NES\Boards\MMC3_family\Mapper115.cs" />
     <Compile Include="Consoles\Nintendo\NES\Boards\MMC3_family\Mapper182.cs" />
+    <Compile Include="Consoles\Nintendo\NES\Boards\MMC3_family\Mapper189.cs" />
     <Compile Include="Consoles\Nintendo\NES\Boards\MMC3_family\Mapper206.cs" />
     <Compile Include="Consoles\Nintendo\NES\Boards\MMC3_family\MMC3_family.cs" />
     <Compile Include="Consoles\Nintendo\NES\Boards\MMC3_family\NES-QJ.cs" />
diff --git a/BizHawk.Emulation/Consoles/Nintendo/Docs/compatibility.txt b/BizHawk.Emulation/Consoles/Nintendo/Docs/compatibility.txt
index 92d16c20fa..20623c418f 100644
--- a/BizHawk.Emulation/Consoles/Nintendo/Docs/compatibility.txt
+++ b/BizHawk.Emulation/Consoles/Nintendo/Docs/compatibility.txt
@@ -98,7 +98,7 @@ Open bus and bus conflict emulation is not considered complete or thorough in an
 182	MMC3Variant	Decent
 184	Sunsoft-1	Complete
 185	Misc (J)	Complete
-189	MMC3Variant	Nothing
+189	MMC3Variant	Decent
 191	Pirate		Junk (mmc3 variant)
 192	Pirate		Junk (mmc3 variant)
 193	Unlicensed	Junk - Started
diff --git a/BizHawk.Emulation/Consoles/Nintendo/NES/Boards/MMC3_family/MMC3_family.cs b/BizHawk.Emulation/Consoles/Nintendo/NES/Boards/MMC3_family/MMC3_family.cs
index 53f2a3ed4f..4702eec4f5 100644
--- a/BizHawk.Emulation/Consoles/Nintendo/NES/Boards/MMC3_family/MMC3_family.cs
+++ b/BizHawk.Emulation/Consoles/Nintendo/NES/Boards/MMC3_family/MMC3_family.cs
@@ -173,7 +173,7 @@ namespace BizHawk.Emulation.Consoles.Nintendo
 					//wram enable/protect
 					wram_write_protect = value.Bit(6);
 					wram_enable = value.Bit(7);
-					Console.WriteLine("wram_write_protect={0},wram_enable={1}", wram_write_protect, wram_enable);
+					//Console.WriteLine("wram_write_protect={0},wram_enable={1}", wram_write_protect, wram_enable);
 					break;
 				case 0x4000: //$C000 - IRQ Reload value
 					irq_reload = value;
diff --git a/BizHawk.Emulation/Consoles/Nintendo/NES/Boards/MMC3_family/Mapper182.cs b/BizHawk.Emulation/Consoles/Nintendo/NES/Boards/MMC3_family/Mapper182.cs
index 27694aa9b7..b96f98587b 100644
--- a/BizHawk.Emulation/Consoles/Nintendo/NES/Boards/MMC3_family/Mapper182.cs
+++ b/BizHawk.Emulation/Consoles/Nintendo/NES/Boards/MMC3_family/Mapper182.cs
@@ -51,15 +51,5 @@ namespace BizHawk.Emulation.Consoles.Nintendo
 			return (val & ~0x7) | scramble_table[val & 0x7];
 		}
 
-		public override void SyncState(Serializer ser)
-		{
-			base.SyncState(ser);
-		}
-
-		public override void WriteWRAM(int addr, byte value)
-		{
-			base.WriteWRAM(addr, value);
-		}
-
 	}
 }
\ No newline at end of file
diff --git a/BizHawk.Emulation/Consoles/Nintendo/NES/iNES.cs b/BizHawk.Emulation/Consoles/Nintendo/NES/iNES.cs
index dcc368227b..50834e281f 100644
--- a/BizHawk.Emulation/Consoles/Nintendo/NES/iNES.cs
+++ b/BizHawk.Emulation/Consoles/Nintendo/NES/iNES.cs
@@ -107,6 +107,7 @@ static string ClassifyTable = @"
 113	-1	-1	-1	-1	AVE-NINA-06; ???
 115	-1	-1	-1	-1	MAPPER115
 182	-1	-1	-1	-1	MAPPER182
+189	-1	-1	-1	-1	MAPPER189
 232	-1	-1	-1	-1	CAMERICA-ALGQ; Quattro Adventure
 240	-1	-1	-1	-1	MAPPER240
 ";