Mapper 115 support

Core/BaseMapper.h

@@ -209,7 +209,7 @@ class BaseMapper : public IMemoryHandler, public Snapshotable, public INotificat
 			}
 		}
 
-		void SelectCHRPage(uint16_t slot, uint16_t page)
+		virtual void SelectCHRPage(uint16_t slot, uint16_t page)
 		{
 			_chrPageNumbers[slot] = page;
 

Core/Core.vcxproj

@@ -197,6 +197,7 @@
     <ClInclude Include="ExpressionEvaluator.h" />
     <ClInclude Include="HdVideoFilter.h" />
     <ClInclude Include="IremTamS1.h" />
+    <ClInclude Include="MMC3_115.h" />
     <ClInclude Include="SoundMixer.h" />
     <ClInclude Include="Namco108.h" />
     <ClInclude Include="Namco108_154.h" />

Core/Core.vcxproj.filters

@@ -353,6 +353,9 @@
     <ClInclude Include="UnRom_94.h">
       <Filter>Nes\Mappers</Filter>
     </ClInclude>
+    <ClInclude Include="MMC3_115.h">
+      <Filter>Nes\Mappers</Filter>
+    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <ClCompile Include="stdafx.cpp">

Core/MMC3_115.h

@@ -0,0 +1,51 @@
+#pragma once
+
+#include "stdafx.h"
+#include "MMC3.h"
+
+class MMC3_115 : public MMC3
+{
+private:
+	uint8_t _prgReg = 0;
+	uint8_t _chrReg = 0;
+
+	virtual uint16_t RegisterStartAddress() { return 0x6000; }
+
+	virtual void WriteRegister(uint16_t addr, uint8_t value)
+	{
+		if(addr < 0x8000) {
+			if(addr & 0x01) {
+				_chrReg = value & 0x01;
+			} else {
+				_prgReg = value;
+			}
+			UpdateState();
+		} else {
+			MMC3::WriteRegister(addr, value);
+		}
+	}
+
+protected:
+	virtual void SelectCHRPage(uint16_t slot, uint16_t page)
+	{
+		page |= (_chrReg << 8);
+		BaseMapper::SelectCHRPage(slot, page);
+	}
+
+	virtual void UpdateState()
+	{
+		MMC3::UpdateState();
+
+		if(_prgReg & 0x80) {
+			SelectPRGPage(0, (_prgReg & 0x0F) << 1);
+			SelectPRGPage(1, ((_prgReg & 0x0F) << 1) + 1);
+		}
+	}
+
+	virtual void StreamState(bool saving)
+	{
+		MMC3::StreamState(saving);
+		Stream<uint8_t>(_prgReg);
+		Stream<uint8_t>(_chrReg);
+	}
+};

Core/MapperFactory.cpp

@@ -16,6 +16,7 @@
 #include "MMC1.h"
 #include "MMC2.h"
 #include "MMC3.h"
+#include "MMC3_115.h"
 #include "MMC3_189.h"
 #include "MMC4.h"
 #include "MMC5.h"
@@ -92,6 +93,7 @@ BaseMapper* MapperFactory::GetMapperFromID(ROMLoader &romLoader)
 		case 97: return new IremTamS1();
 		case 101: return new JalecoJfxx(true);
 		case 113: return new Nina03_06(true);
+		case 115: return new MMC3_115();
 		case 145: return new Sachen_145();
 		case 146: return new Nina03_06(false);
 		case 147: return new Sachen_147();