Mapper 218 support

Core/BaseMapper.cpp

@@ -341,6 +341,8 @@ void BaseMapper::Initialize(RomData &romData)
 	memset(_isWriteRegisterAddr, 0, sizeof(_isWriteRegisterAddr));
 	AddRegisterRange(RegisterStartAddress(), RegisterEndAddress(), MemoryOperation::Any);
 
+	_nesHeader = romData.NesHeader;
+
 	_mirroringType = romData.MirroringType;
 
 	_prgSize = (uint32_t)romData.PrgRom.size();

Core/BaseMapper.h

@@ -75,6 +75,7 @@ private:
 	vector<uint8_t> _originalPrgRom;
 
 protected:
+	NESHeader _nesHeader;
 	uint16_t _mapperID;
 	uint8_t _subMapperID;
 
@@ -168,7 +169,7 @@ public:
 	
 	void ApplyCheats();
 
-	void SetDefaultNametables(uint8_t* nametableA, uint8_t* nametableB);
+	virtual void SetDefaultNametables(uint8_t* nametableA, uint8_t* nametableB);
 
 	GameSystem GetGameSystem();
 	uint32_t GetCrc32();

Core/Core.vcxproj

@@ -420,6 +420,7 @@
     <ClInclude Include="Mapper201.h" />
     <ClInclude Include="Mapper202.h" />
     <ClInclude Include="Mapper203.h" />
+    <ClInclude Include="Mapper218.h" />
     <ClInclude Include="Mapper225.h" />
     <ClInclude Include="Mapper226.h" />
     <ClInclude Include="Mapper230.h" />

Core/Core.vcxproj.filters

@@ -640,6 +640,9 @@
     <ClInclude Include="MMC1_155.h">
       <Filter>Nes\Mappers\MMC</Filter>
     </ClInclude>
+    <ClInclude Include="Mapper218.h">
+      <Filter>Nes\Mappers\Unnamed</Filter>
+    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <ClCompile Include="stdafx.cpp">

Core/Mapper218.h

@@ -0,0 +1,35 @@
+#pragma once
+#include "BaseMapper.h"
+
+class Mapper218 : public BaseMapper
+{
+protected:
+	uint16_t GetPRGPageSize() { return 0x8000; }
+	uint16_t GetCHRPageSize() { return 0x2000; }
+
+	void InitMapper()
+	{
+		SelectPRGPage(0, 0);
+
+		if(GetMirroringType() == MirroringType::FourScreens) {
+			SetMirroringType(_nesHeader.Byte6 & 0x01 ? MirroringType::ScreenBOnly : MirroringType::ScreenAOnly);
+		}
+	}
+
+	void SetDefaultNametables(uint8_t* nametableA, uint8_t* nametableB)
+	{
+		BaseMapper::SetDefaultNametables(nametableA, nametableB);
+
+		uint16_t mask = 0;
+		switch(GetMirroringType()) {
+			case MirroringType::Vertical: mask = 0x400; break;
+			case MirroringType::Horizontal: mask = 0x800; break;
+			case MirroringType::ScreenAOnly: mask = 0x1000; break;
+			case MirroringType::ScreenBOnly: mask = 0x2000; break;
+		}
+
+		for(int i = 0; i < 8; i++) {
+			SetPpuMemoryMapping(i * 0x400, i * 0x400 + 0x3FF, (i * 0x400) & mask ? GetNametable(1) : GetNametable(0));
+		}
+	}
+};

Core/MapperFactory.cpp

@@ -38,6 +38,7 @@
 #include "Mapper201.h"
 #include "Mapper202.h"
 #include "Mapper203.h"
+#include "Mapper218.h"
 #include "Mapper225.h"
 #include "Mapper226.h"
 #include "Mapper230.h"
@@ -225,6 +226,7 @@ BaseMapper* MapperFactory::GetMapperFromID(RomData &romData)
 		case 206: return new Namco108();
 		case 207: return new TaitoX1005(true);
 		case 210: return new Namco163();
+		case 218: return new Mapper218();
 		case 225: return new Mapper225();
 		case 226: return new Mapper226();
 		case 230: return new Mapper230();

Core/RomData.h

@@ -29,32 +29,6 @@ enum class GameSystem
 	Unknown,
 };
 
-struct RomData
-{
-	string RomName;
-	string Filename;
-
-	uint16_t MapperID;
-	uint8_t SubMapperID = 0;
-	GameSystem System = GameSystem::Unknown;
-	bool HasBattery = false;
-	bool HasTrainer = false;
-	MirroringType MirroringType;
-	int32_t ChrRamSize = -1;
-
-	bool IsNes20Header = false;
-
-	vector<uint8_t> PrgRom;
-	vector<uint8_t> ChrRom;
-	vector<uint8_t> TrainerData;
-	vector<vector<uint8_t>> FdsDiskData;
-
-	vector<uint8_t> RawData;
-	uint32_t Crc32;
-
-	bool Error = false;
-};
-
 struct NESHeader
 {
 	/*
@@ -220,4 +194,32 @@ struct NESHeader
 			calculatedLength = sizeof(NESHeader) + 0x4000 * PrgCount + 0x2000 * ChrCount;
 		}
 	}
+};
+
+struct RomData
+{
+	string RomName;
+	string Filename;
+
+	uint16_t MapperID;
+	uint8_t SubMapperID = 0;
+	GameSystem System = GameSystem::Unknown;
+	bool HasBattery = false;
+	bool HasTrainer = false;
+	MirroringType MirroringType;
+	int32_t ChrRamSize = -1;
+
+	bool IsNes20Header = false;
+
+	vector<uint8_t> PrgRom;
+	vector<uint8_t> ChrRom;
+	vector<uint8_t> TrainerData;
+	vector<vector<uint8_t>> FdsDiskData;
+
+	vector<uint8_t> RawData;
+	uint32_t Crc32;
+
+	bool Error = false;
+
+	NESHeader NesHeader;
 };

Core/iNesLoader.cpp

@@ -29,6 +29,7 @@ RomData iNesLoader::LoadRom(vector<uint8_t>& romFile)
 	}
 	romData.HasTrainer = header.HasTrainer();
 	romData.ChrRamSize = header.GetChrRamSize();
+	romData.NesHeader = header;
 
 	if(romData.HasTrainer) {
 		//512-byte trainer at $7000-$71FF (stored before PRG data)