diff --git a/Core/Core.vcxproj b/Core/Core.vcxproj
index c182ac9d..7bba24ce 100644
--- a/Core/Core.vcxproj
+++ b/Core/Core.vcxproj
@@ -658,6 +658,7 @@
     <ClInclude Include="Sunsoft89.h" />
     <ClInclude Include="Sunsoft93.h" />
     <ClInclude Include="SunsoftFme7.h" />
+    <ClInclude Include="MMC3_Super24in1Sc03.h" />
     <ClInclude Include="Supervision.h" />
     <ClInclude Include="T262.h" />
     <ClInclude Include="TaitoTc0190.h" />
diff --git a/Core/Core.vcxproj.filters b/Core/Core.vcxproj.filters
index 80d41a9a..43179853 100644
--- a/Core/Core.vcxproj.filters
+++ b/Core/Core.vcxproj.filters
@@ -1009,6 +1009,9 @@
     <ClInclude Include="Ax5705.h">
       <Filter>Nes\Mappers\Unif</Filter>
     </ClInclude>
+    <ClInclude Include="MMC3_Super24in1Sc03.h">
+      <Filter>Nes\Mappers\Unif</Filter>
+    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <ClCompile Include="stdafx.cpp">
diff --git a/Core/MMC3_Super24in1Sc03.h b/Core/MMC3_Super24in1Sc03.h
new file mode 100644
index 00000000..ab02f2b0
--- /dev/null
+++ b/Core/MMC3_Super24in1Sc03.h
@@ -0,0 +1,55 @@
+#pragma once
+#include "stdafx.h"
+#include "MMC3.h"
+
+class MMC3_Super24in1Sc03 : public MMC3
+{
+private:
+	const int _prgMask[8] = { 0x3F, 0x1F, 0x0F, 0x01, 0x03, 0, 0, 0 };
+	uint8_t _exRegs[3];
+
+protected:
+	uint32_t GetChrRamSize() override { return 0x2000; }
+	uint16_t GetChrRamPageSize() override { return 0x400; }
+
+	void InitMapper() override
+	{
+		_exRegs[0] = 0x24;
+		_exRegs[1] = 0x9F;
+		_exRegs[2] = 0;
+
+		MMC3::InitMapper();
+
+		AddRegisterRange(0x5FF0, 0x5FF2, MemoryOperation::Write);
+	}
+
+	void StreamState(bool saving) override
+	{
+		MMC3::StreamState(saving);
+		Stream(_exRegs[0], _exRegs[1], _exRegs[2]);
+		
+		if(!saving) {
+			UpdateState();
+		}
+	}
+
+	void SelectCHRPage(uint16_t slot, uint16_t page, ChrMemoryType memoryType = ChrMemoryType::Default) override
+	{
+		MMC3::SelectCHRPage(slot, ((_exRegs[2] << 3) & 0xF00) | page, _exRegs[0] & 0x20 ? ChrMemoryType::ChrRam : ChrMemoryType::ChrRom);
+	}
+
+	void SelectPRGPage(uint16_t slot, uint16_t page, PrgMemoryType memoryType = PrgMemoryType::PrgRom) override
+	{
+		MMC3::SelectPRGPage(slot, ((_exRegs[1] << 1) | (page & _prgMask[_exRegs[0] & 0x07])) & 0xFF);
+	}
+
+	void WriteRegister(uint16_t addr, uint8_t value) override
+	{
+		if(addr < 0x8000) {
+			_exRegs[addr & 0x03] = value;
+			UpdateState();
+		} else {
+			MMC3::WriteRegister(addr, value);
+		}
+	}
+};
\ No newline at end of file
diff --git a/Core/MapperFactory.cpp b/Core/MapperFactory.cpp
index 4c328f16..69d5bd19 100644
--- a/Core/MapperFactory.cpp
+++ b/Core/MapperFactory.cpp
@@ -138,6 +138,7 @@
 #include "MMC3_Coolboy.h"
 #include "MMC3_Kof97.h"
 #include "MMC3_StreetHeroes.h"
+#include "MMC3_Super24in1Sc03.h"
 #include "MMC4.h"
 #include "MMC5.h"
 #include "Namco108.h"
@@ -250,6 +251,7 @@ const uint16_t MapperFactory::UnifMalee;
 const uint16_t MapperFactory::UnifNovelDiamond;
 const uint16_t MapperFactory::UnifStreetHeroes;
 const uint16_t MapperFactory::UnifSmb2j;
+const uint16_t MapperFactory::UnifSuper24in1Sc03;
 const uint16_t MapperFactory::UnifT262;
 const uint16_t MapperFactory::UnifTf1201;
 
@@ -496,6 +498,7 @@ BaseMapper* MapperFactory::GetMapperFromID(RomData &romData)
 		case MapperFactory::UnifNovelDiamond: return new NovelDiamond();
 		case MapperFactory::UnifSmb2j: return new Smb2j();
 		case MapperFactory::UnifStreetHeroes: return new MMC3_StreetHeroes();
+		case MapperFactory::UnifSuper24in1Sc03: return new MMC3_Super24in1Sc03();
 		case MapperFactory::UnifT262: return new T262();
 		case MapperFactory::UnifTf1201: return new Tf1201();
 
diff --git a/Core/MapperFactory.h b/Core/MapperFactory.h
index 59cbab93..69e8eb67 100644
--- a/Core/MapperFactory.h
+++ b/Core/MapperFactory.h
@@ -31,6 +31,7 @@ class MapperFactory
 		static const uint16_t UnifBmc70in1 = 65516;
 		static const uint16_t UnifBmc70in1B = 65515;
 		static const uint16_t UnifAx5705 = 65514;
+		static const uint16_t UnifSuper24in1Sc03 = 65513;
 
 		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 28410851..7a2d29f3 100644
--- a/Core/UnifLoader.h
+++ b/Core/UnifLoader.h
@@ -120,7 +120,7 @@ private:
 		{ "Sachen-8259B", 138 },
 		{ "Sachen-8259C", 139 },
 		{ "Sachen-8259D", 137 },
-		{ "Super24in1SC03", MapperFactory::UnknownBoard },
+		{ "Super24in1SC03", MapperFactory::UnifSuper24in1Sc03 },
 		{ "SuperHIK8in1", 45 },
 		{ "Supervision16in1", 53 },
 		{ "T-227-1", MapperFactory::UnknownBoard },