From 86231c94e397a579e51fde56caaca1a4f906413d Mon Sep 17 00:00:00 2001
From: Sour <mesenemu@gmail.com>
Date: Mon, 25 Jun 2018 13:35:40 -0400
Subject: [PATCH] UNIF: Added support for BMC-60311C boards

---
 Core/Bmc60311C.h          | 83 +++++++++++++++++++++++++++++++++++++++
 Core/Core.vcxproj         |  1 +
 Core/Core.vcxproj.filters |  3 ++
 Core/MapperFactory.cpp    |  2 +
 Core/UnifBoards.h         |  1 +
 Core/UnifLoader.cpp       |  1 +
 6 files changed, 91 insertions(+)
 create mode 100644 Core/Bmc60311C.h

diff --git a/Core/Bmc60311C.h b/Core/Bmc60311C.h
new file mode 100644
index 00000000..336f3f20
--- /dev/null
+++ b/Core/Bmc60311C.h
@@ -0,0 +1,83 @@
+#pragma once
+#include "stdafx.h"
+#include "BaseMapper.h"
+
+class Bmc60311C : public BaseMapper
+{
+private:
+	uint8_t _innerPrg;
+	uint8_t _outerPrg;
+	uint8_t _mode;
+
+protected:
+	uint16_t GetPRGPageSize() override { return 0x4000; }
+	uint16_t GetCHRPageSize() override { return 0x2000; }
+	uint16_t RegisterStartAddress() override { return 0x6000; }
+	uint16_t RegisterEndAddress() override { return 0xFFFF; }
+
+	void InitMapper() override
+	{
+		_innerPrg = 0;
+		_outerPrg = 0;
+		_mode = 0;
+
+		UpdateState();
+		SelectCHRPage(0, 0);
+	}
+
+	void StreamState(bool saving) override
+	{
+		BaseMapper::StreamState(saving);
+		Stream(_innerPrg, _outerPrg, _mode);
+	}
+
+	void UpdateState()
+	{
+		uint8_t page = _outerPrg | ((_mode & 0x04) ? 0 : _innerPrg);
+
+		switch(_mode & 0x03) {
+			case 0:
+				//0: NROM-128: Same inner/outer 16 KiB bank at CPU $8000-$BFFF and $C000-$FFFF
+				SelectPRGPage(0, page);
+				SelectPRGPage(1, page);
+				break;
+
+			case 1:
+				//1: NROM-256: 32 kiB bank at CPU $8000-$FFFF (Selected inner/outer bank SHR 1)
+				SelectPrgPage2x(0, page & 0xFE);
+				break;
+
+			case 2:
+				//2: UNROM: Inner/outer bank at CPU $8000-BFFF, fixed inner bank 7 within outer bank at $C000-$FFFF
+				SelectPRGPage(0, page);
+				SelectPRGPage(1, _outerPrg | 7);
+				break;
+
+			case 3:
+				//Unknown
+				break;
+		}
+
+		SetMirroringType(_mode & 0x08 ? MirroringType::Horizontal : MirroringType::Vertical);
+	}
+
+	void WriteRegister(uint16_t addr, uint8_t value) override
+	{
+		if(addr >= 0x8000) {
+			_innerPrg = value & 0x07;
+			UpdateState();
+		} else {
+			switch(addr & 0xE001) {
+				case 0x6000:
+					_mode = value & 0x0F;
+					UpdateState();
+					break;
+
+				case 0x6001:
+					_outerPrg = value;
+					UpdateState();
+					break;
+			}
+		}
+	}
+};
\ No newline at end of file
diff --git a/Core/Core.vcxproj b/Core/Core.vcxproj
index 53e95109..da42535f 100644
--- a/Core/Core.vcxproj
+++ b/Core/Core.vcxproj
@@ -518,6 +518,7 @@
     <ClInclude Include="BaseSoundManager.h" />
     <ClInclude Include="BatteryManager.h" />
     <ClInclude Include="BattleBox.h" />
+    <ClInclude Include="Bmc60311C.h" />
     <ClInclude Include="Bmc80013B.h" />
     <ClInclude Include="Bmc8157.h" />
     <ClInclude Include="Bmc830118C.h" />
diff --git a/Core/Core.vcxproj.filters b/Core/Core.vcxproj.filters
index 4917a4b8..cad6c884 100644
--- a/Core/Core.vcxproj.filters
+++ b/Core/Core.vcxproj.filters
@@ -1453,6 +1453,9 @@
     <ClInclude Include="IMemoryManager.h">
       <Filter>Nes\MemoryManager</Filter>
     </ClInclude>
+    <ClInclude Include="Bmc60311C.h">
+      <Filter>Nes\Mappers\Unif</Filter>
+    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <ClCompile Include="stdafx.cpp">
diff --git a/Core/MapperFactory.cpp b/Core/MapperFactory.cpp
index 1c7191e0..ec6c6fba 100644
--- a/Core/MapperFactory.cpp
+++ b/Core/MapperFactory.cpp
@@ -25,6 +25,7 @@
 #include "Bmc190in1.h"
 #include "Bmc235.h"
 #include "Bmc255.h"
+#include "Bmc60311C.h"
 #include "Bmc8157.h"
 #include "Bmc80013B.h"
 #include "Bmc810544CA1.h"
@@ -544,6 +545,7 @@ BaseMapper* MapperFactory::GetMapperFromID(RomData &romData)
 		case UnifBoards::Bmc70in1: return new Bmc70in1();
 		case UnifBoards::Bmc70in1B: return new Bmc70in1();
 		case UnifBoards::Bmc190in1: return new Bmc190in1();
+		case UnifBoards::Bmc60311C: return new Bmc60311C();
 		case UnifBoards::Bmc810544CA1: return new Bmc810544CA1();
 		case UnifBoards::Bmc830118C: return new Bmc830118C();
 		case UnifBoards::Bmc80013B: return new Bmc80013B();
diff --git a/Core/UnifBoards.h b/Core/UnifBoards.h
index 016daf04..f2eb075b 100644
--- a/Core/UnifBoards.h
+++ b/Core/UnifBoards.h
@@ -72,5 +72,6 @@ namespace UnifBoards {
 		BmcGn45,
 		UnlDripGame,
 		SssNrom256,
+		Bmc60311C,
 	};
 }
\ No newline at end of file
diff --git a/Core/UnifLoader.cpp b/Core/UnifLoader.cpp
index 3386cf5a..bf5e286a 100644
--- a/Core/UnifLoader.cpp
+++ b/Core/UnifLoader.cpp
@@ -161,4 +161,5 @@ std::unordered_map<string, int> UnifLoader::_boardMappings = std::unordered_map<
 	{ "HPxx", UnifBoards::BmcHpxx },
 	{ "GN-45", UnifBoards::BmcGn45 }, //Doesn't actually exist as a UNIF file (used to assign a mapper to GN-45 boards)
 	{ "DRIPGAME", UnifBoards::UnlDripGame },
+	{ "60311C", UnifBoards::Bmc60311C },
 };
\ No newline at end of file