From 1e454a46fe775fa575b15e8addd11da2c115130b Mon Sep 17 00:00:00 2001
From: adelikat <adelikat@tasvideos.org>
Date: Fri, 21 Aug 2015 23:23:33 -0400
Subject: [PATCH] NesHawk - implement mapper 214

---
 .../BizHawk.Emulation.Cores.csproj            |  1 +
 .../Consoles/Nintendo/NES/Boards/Mapper214.cs | 53 +++++++++++++++++++
 2 files changed, 54 insertions(+)
 create mode 100644 BizHawk.Emulation.Cores/Consoles/Nintendo/NES/Boards/Mapper214.cs

diff --git a/BizHawk.Emulation.Cores/BizHawk.Emulation.Cores.csproj b/BizHawk.Emulation.Cores/BizHawk.Emulation.Cores.csproj
index 60d90e4ba5..18e981bfbb 100644
--- a/BizHawk.Emulation.Cores/BizHawk.Emulation.Cores.csproj
+++ b/BizHawk.Emulation.Cores/BizHawk.Emulation.Cores.csproj
@@ -548,6 +548,7 @@
     <Compile Include="Consoles\Nintendo\NES\Boards\Mapper202.cs" />
     <Compile Include="Consoles\Nintendo\NES\Boards\Mapper203.cs" />
     <Compile Include="Consoles\Nintendo\NES\Boards\Mapper204.cs" />
+    <Compile Include="Consoles\Nintendo\NES\Boards\Mapper214.cs" />
     <Compile Include="Consoles\Nintendo\NES\Boards\Mapper218.cs" />
     <Compile Include="Consoles\Nintendo\NES\Boards\Mapper222.cs" />
     <Compile Include="Consoles\Nintendo\NES\Boards\Mapper225.cs" />
diff --git a/BizHawk.Emulation.Cores/Consoles/Nintendo/NES/Boards/Mapper214.cs b/BizHawk.Emulation.Cores/Consoles/Nintendo/NES/Boards/Mapper214.cs
new file mode 100644
index 0000000000..04552df6a8
--- /dev/null
+++ b/BizHawk.Emulation.Cores/Consoles/Nintendo/NES/Boards/Mapper214.cs
@@ -0,0 +1,53 @@
+using BizHawk.Common;
+
+namespace BizHawk.Emulation.Cores.Nintendo.NES
+{
+	// Super Gun 20-in-1
+	// http://wiki.nesdev.com/w/index.php/INES_Mapper_214
+	public class Mapper214 : NES.NESBoardBase
+	{
+		private int _chrReg, _prgReg;
+
+		public override bool Configure(NES.EDetectionOrigin origin)
+		{
+			switch (Cart.board_type)
+			{
+				case "MAPPER214":
+					break;
+				default:
+					return false;
+			}
+
+			SetMirrorType(EMirrorType.Vertical);
+
+			return true;
+		}
+
+		public override void SyncState(Serializer ser)
+		{
+			base.SyncState(ser);
+			ser.Sync("chrReg", ref _chrReg);
+		}
+
+		public override void WritePRG(int addr, byte value)
+		{
+			_chrReg = addr & 3;
+			_prgReg = (addr >> 2) & 3;
+		}
+
+		public override byte ReadPRG(int addr)
+		{
+			return ROM[(_prgReg * 0x4000) + (addr & 0x3FFF)];
+		}
+
+		public override byte ReadPPU(int addr)
+		{
+			if (addr < 0x2000)
+			{
+				return VROM[(_chrReg * 0x2000) + (addr & 0x1FFF)];
+			}
+
+			return base.ReadPPU(addr);
+		}
+	}
+}