diff --git a/Core/Core.vcxproj b/Core/Core.vcxproj
index a98fdc5b..3170101a 100644
--- a/Core/Core.vcxproj
+++ b/Core/Core.vcxproj
@@ -532,6 +532,7 @@
     <ClInclude Include="MMC3_52.h" />
     <ClInclude Include="MMC3_ChrRam.h" />
     <ClInclude Include="MMC3_Coolboy.h" />
+    <ClInclude Include="MMC3_Kof97.h" />
     <ClInclude Include="MMC5Audio.h" />
     <ClInclude Include="ModChannel.h" />
     <ClInclude Include="Namco163.h" />
diff --git a/Core/Core.vcxproj.filters b/Core/Core.vcxproj.filters
index 9743a431..f400fc77 100644
--- a/Core/Core.vcxproj.filters
+++ b/Core/Core.vcxproj.filters
@@ -985,6 +985,9 @@
     <ClInclude Include="NovelDiamond.h">
       <Filter>Nes\Mappers\Unif</Filter>
     </ClInclude>
+    <ClInclude Include="MMC3_Kof97.h">
+      <Filter>Nes\Mappers\Unif</Filter>
+    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <ClCompile Include="stdafx.cpp">
diff --git a/Core/MMC3_Kof97.h b/Core/MMC3_Kof97.h
new file mode 100644
index 00000000..d9c14113
--- /dev/null
+++ b/Core/MMC3_Kof97.h
@@ -0,0 +1,21 @@
+#pragma once
+#include "stdafx.h"
+#include "MMC3.h"
+
+class MMC3_Kof97 : public MMC3
+{
+protected:
+	void WriteRegister(uint16_t addr, uint8_t value) override
+	{
+		value = (value & 0xD8) | ((value & 0x20) >> 4) | ((value & 0x04) << 3) | ((value & 0x02) >> 1) | ((value & 0x01) << 2);
+		if(addr == 0x9000) {
+			addr = 0x8001;
+		} else if(addr == 0xD000) {
+			addr = 0xC001;
+		} else if(addr == 0xF000) {
+			addr = 0xE001;
+		}
+
+		MMC3::WriteRegister(addr, value);
+	}
+};
\ No newline at end of file
diff --git a/Core/MapperFactory.cpp b/Core/MapperFactory.cpp
index 944abcca..0a953342 100644
--- a/Core/MapperFactory.cpp
+++ b/Core/MapperFactory.cpp
@@ -130,6 +130,7 @@
 #include "MMC3_254.h"
 #include "MMC3_ChrRam.h"
 #include "MMC3_Coolboy.h"
+#include "MMC3_Kof97.h"
 #include "MMC3_StreetHeroes.h"
 #include "MMC4.h"
 #include "MMC5.h"
@@ -230,6 +231,7 @@ const uint16_t MapperFactory::UnifDreamTech01;
 const uint16_t MapperFactory::UnifEdu2000;
 const uint16_t MapperFactory::UnifGs2004;
 const uint16_t MapperFactory::UnifGs2013;
+const uint16_t MapperFactory::UnifKof97;
 const uint16_t MapperFactory::UnifMalee;
 const uint16_t MapperFactory::UnifNovelDiamond;
 const uint16_t MapperFactory::UnifStreetHeroes;
@@ -466,6 +468,7 @@ BaseMapper* MapperFactory::GetMapperFromID(RomData &romData)
 		case MapperFactory::UnifEdu2000: return new Edu2000();
 		case MapperFactory::UnifGs2004: return new Gs2004();
 		case MapperFactory::UnifGs2013: return new Gs2013();
+		case MapperFactory::UnifKof97: return new MMC3_Kof97();
 		case MapperFactory::UnifMalee: return new Malee();
 		case MapperFactory::UnifNovelDiamond: return new NovelDiamond();
 		case MapperFactory::UnifSmb2j: return new Smb2j();
diff --git a/Core/MapperFactory.h b/Core/MapperFactory.h
index ff86dc14..10ad9ce9 100644
--- a/Core/MapperFactory.h
+++ b/Core/MapperFactory.h
@@ -22,6 +22,7 @@ class MapperFactory
 		static const uint16_t UnifGs2013 = 65525;
 		static const uint16_t UnifGs2004 = 65524;
 		static const uint16_t UnifNovelDiamond = 65523;
+		static const uint16_t UnifKof97 = 65522;
 
 		static shared_ptr<BaseMapper> InitializeFromFile(string romFilename, stringstream *filestream, string ipsFilename, int32_t archiveFileIndex);
 };
diff --git a/Core/UnifLoader.h b/Core/UnifLoader.h
index 0f80f897..3df5ee33 100644
--- a/Core/UnifLoader.h
+++ b/Core/UnifLoader.h
@@ -57,7 +57,7 @@ private:
 		{ "Ghostbusters63in1", MapperFactory::UnknownBoard },
 		{ "H2288", 123 },
 		{ "HKROM", MapperFactory::UnknownBoard },
-		{ "KOF97", MapperFactory::UnknownBoard },
+		{ "KOF97", MapperFactory::UnifKof97 },
 		{ "KONAMI-QTAI", MapperFactory::UnknownBoard },
 		{ "KS7010", MapperFactory::UnknownBoard },
 		{ "KS7012", MapperFactory::UnknownBoard },