UNIF BMC-70in1/BMC-70in1B board support (Defined as mapper #236 in Nestopia)

Core/BaseMapper.cpp

@@ -363,6 +363,11 @@ bool BaseMapper::HasChrRam()
 	return _chrRamSize > 0;
 }
 
+bool BaseMapper::HasChrRom()
+{
+	return !_onlyChrRam;
+}
+
 void BaseMapper::AddRegisterRange(uint16_t startAddr, uint16_t endAddr, MemoryOperation operation)
 {
 	for(int i = startAddr; i <= endAddr; i++) {

Core/BaseMapper.h

@@ -177,6 +177,7 @@ protected:
 	void RestoreOriginalPrgRam();
 	void InitializeChrRam(int32_t chrRamSize = -1);
 	bool HasChrRam();
+	bool HasChrRom();
 
 	void AddRegisterRange(uint16_t startAddr, uint16_t endAddr, MemoryOperation operation = MemoryOperation::Any);
 	void RemoveRegisterRange(uint16_t startAddr, uint16_t endAddr, MemoryOperation operation = MemoryOperation::Any);

Core/Bmc70in1.h

@@ -0,0 +1,94 @@
+#pragma once
+#include "stdafx.h"
+#include "BaseMapper.h"
+
+class Bmc70in1 : public BaseMapper
+{
+private:
+	uint8_t _bankMode;
+	uint8_t _outerBank;
+	uint8_t _prgReg;
+	uint8_t _chrReg;
+	uint8_t _dipSwitch;
+	bool _useOuterBank;
+
+protected:
+	uint16_t GetPRGPageSize() { return 0x4000; }
+	uint16_t GetCHRPageSize() { return 0x2000; }
+	bool AllowRegisterRead() { return true; }
+
+	void InitMapper() override
+	{
+		_prgReg = 0;
+		_chrReg = 0;
+
+		if(HasChrRom()) {
+			_useOuterBank = false;
+			_dipSwitch = 0x0C;
+		} else {
+			_useOuterBank = true;
+			_dipSwitch = 0x05;
+		}
+
+		SelectCHRPage(0, 0);
+		UpdateState();
+	}
+
+	void Reset(bool softReset) override
+	{
+		BaseMapper::Reset(softReset);
+
+		_bankMode = 0;
+		_outerBank = 0;
+		_dipSwitch = (_dipSwitch + 1) & 0x0F;
+	}
+
+	void UpdateState()
+	{
+		switch(_bankMode) {
+			case 0x00: case 0x10:
+				SelectPRGPage(0, _outerBank | _prgReg);
+				SelectPRGPage(1, _outerBank | 7);
+				break;
+			
+			case 0x20:
+				SelectPrgPage2x(0, (_outerBank | _prgReg) & 0xFE);
+				break;
+			
+			case 0x30:
+				SelectPRGPage(0, _outerBank | _prgReg);
+				SelectPRGPage(1, _outerBank | _prgReg);
+				break;
+		}
+
+		if(!_useOuterBank) {
+			SelectCHRPage(0, _chrReg);
+		}
+	}
+
+	uint8_t ReadRegister(uint16_t addr) override
+	{
+		if(_bankMode == 0x10) {
+			return InternalReadRam((addr & 0xFFF0) | _dipSwitch);
+		} else {
+			return InternalReadRam(addr);
+		}
+	}
+
+	void WriteRegister(uint16_t addr, uint8_t value) override
+	{
+		if(addr & 0x4000) { 
+			_bankMode = addr & 0x30;
+			_prgReg = addr & 0x07;
+		} else {
+			SetMirroringType(addr & 0x20 ? MirroringType::Horizontal : MirroringType::Vertical);
+			if(_useOuterBank) {
+				_outerBank = (addr & 0x03) << 3;
+			} else {
+				_chrReg = addr & 0x07;
+			}
+		}
+
+		UpdateState();
+	}
+};

Core/Core.vcxproj

@@ -419,6 +419,7 @@
     <ClInclude Include="Bmc51.h" />
     <ClInclude Include="Bmc63.h" />
     <ClInclude Include="A65AS.h" />
+    <ClInclude Include="Bmc70in1.h" />
     <ClInclude Include="BnRom.h" />
     <ClInclude Include="Bs5.h" />
     <ClInclude Include="Caltron41.h" />

Core/Core.vcxproj.filters

@@ -1003,6 +1003,9 @@
     <ClInclude Include="Ghostbusters63in1.h">
       <Filter>Nes\Mappers\Unif</Filter>
     </ClInclude>
+    <ClInclude Include="Bmc70in1.h">
+      <Filter>Nes\Mappers\Unif</Filter>
+    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <ClCompile Include="stdafx.cpp">

Core/MapperFactory.cpp

@@ -13,6 +13,7 @@
 #include "BF9096.h"
 #include "Bmc51.h"
 #include "Bmc63.h"
+#include "Bmc70in1.h"
 #include "Bmc190in1.h"
 #include "Bmc235.h"
 #include "Bmc255.h"
@@ -223,7 +224,7 @@ Supported mappers:
 |176|177|178|179|180|---|182|183|184|185|186|187|188|189|===|191|
 |192|193|194|195|196|197|   |199|200|201|202|203|204|205|206|207|
 |???|209|210|211|212|213|214|215|216|217|218|219|220|221|222|???|
-|???|225|226|227|228|229|230|231|232|233|234|235|???|===|238|===|
+|???|225|226|227|228|229|230|231|232|233|234|235|236|===|238|===|
 |240|241|242|243|244|245|246|===|===|249|250|===|252|253|254|255|
 -----------------------------------------------------------------
 */
@@ -232,6 +233,8 @@ const uint16_t MapperFactory::FdsMapperID;
 const uint16_t MapperFactory::NsfMapperID;
 const uint16_t MapperFactory::UnknownBoard;
 const uint16_t MapperFactory::UnifA65AS;
+const uint16_t MapperFactory::UnifBmc70in1;
+const uint16_t MapperFactory::UnifBmc70in1B;
 const uint16_t MapperFactory::UnifBmc190in1;
 const uint16_t MapperFactory::UnifBs5;
 const uint16_t MapperFactory::UnifCoolboy;
@@ -458,6 +461,7 @@ BaseMapper* MapperFactory::GetMapperFromID(RomData &romData)
 		case 233: return new Mapper233();
 		case 234: return new Mapper234();
 		case 235: return new Bmc235();
+		case 236: return new Bmc70in1();
 		case 238: return new MMC3_238();
 		case 240: return new Mapper240();
 		case 241: return new Mapper241();
@@ -474,6 +478,8 @@ BaseMapper* MapperFactory::GetMapperFromID(RomData &romData)
 		case 255: return new Bmc255();
 
 		case MapperFactory::UnifA65AS: return new A65AS();
+		case MapperFactory::UnifBmc70in1: return new Bmc70in1();
+		case MapperFactory::UnifBmc70in1B: return new Bmc70in1();
 		case MapperFactory::UnifBmc190in1: return new Bmc190in1();
 		case MapperFactory::UnifBs5: return new Bs5();
 		case MapperFactory::UnifCoolboy: return new MMC3_Coolboy();

Core/MapperFactory.h

@@ -28,6 +28,8 @@ class MapperFactory
 		static const uint16_t UnifBs5 = 65519;
 		static const uint16_t UnifBmc190in1 = 65518;
 		static const uint16_t UnifGhostbusters63in1 = 65517;
+		static const uint16_t UnifBmc70in1 = 65516;
+		static const uint16_t UnifBmc70in1B = 65515;
 
 		static shared_ptr<BaseMapper> InitializeFromFile(string romFilename, stringstream *filestream, string ipsFilename, int32_t archiveFileIndex);
 };

Core/UnifLoader.h

@@ -19,8 +19,8 @@ private:
 		{ "43272", MapperFactory::UnknownBoard },
 		{ "603-5052", 238 },
 		{ "64in1NoRepeat", MapperFactory::UnknownBoard },
-		{ "70in1", MapperFactory::UnknownBoard },
-		{ "70in1B", MapperFactory::UnknownBoard },
+		{ "70in1", MapperFactory::UnifBmc70in1 },
+		{ "70in1B", MapperFactory::UnifBmc70in1B },
 		{ "810544-C-A1", MapperFactory::UnknownBoard },
 		{ "8157", MapperFactory::UnknownBoard },
 		{ "8237", 215 },