From 5d3c51d7bedec16829f3a8379a0c1c69855f7d21 Mon Sep 17 00:00:00 2001
From: Souryo <mesenemu@gmail.com>
Date: Tue, 29 Dec 2015 21:18:37 -0500
Subject: [PATCH] GxRom (Mapper 66) support

---
 Core/Core.vcxproj         |  1 +
 Core/Core.vcxproj.filters |  3 +++
 Core/GxRom.h              | 23 +++++++++++++++++++++++
 3 files changed, 27 insertions(+)
 create mode 100644 Core/GxRom.h

diff --git a/Core/Core.vcxproj b/Core/Core.vcxproj
index 7b391d13..e4f24242 100644
--- a/Core/Core.vcxproj
+++ b/Core/Core.vcxproj
@@ -293,6 +293,7 @@
     <ClInclude Include="GameInformationMessage.h" />
     <ClInclude Include="GameServer.h" />
     <ClInclude Include="GameServerConnection.h" />
+    <ClInclude Include="GxRom.h" />
     <ClInclude Include="HandShakeMessage.h" />
     <ClInclude Include="HdNesPack.h" />
     <ClInclude Include="HdPpu.h" />
diff --git a/Core/Core.vcxproj.filters b/Core/Core.vcxproj.filters
index 0f8d97ce..7b825e3d 100644
--- a/Core/Core.vcxproj.filters
+++ b/Core/Core.vcxproj.filters
@@ -260,6 +260,9 @@
     <ClInclude Include="TaitoTc0190.h">
       <Filter>Header Files\Mappers</Filter>
     </ClInclude>
+    <ClInclude Include="GxRom.h">
+      <Filter>Header Files\Mappers</Filter>
+    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <ClCompile Include="CPU.cpp">
diff --git a/Core/GxRom.h b/Core/GxRom.h
new file mode 100644
index 00000000..ddc6ac74
--- /dev/null
+++ b/Core/GxRom.h
@@ -0,0 +1,23 @@
+#pragma once
+#include "stdafx.h"
+#include "BaseMapper.h"
+
+class GxRom : public BaseMapper
+{
+	protected:
+		virtual uint16_t GetPRGPageSize() { return 0x8000; }
+		virtual uint16_t GetCHRPageSize() {	return 0x2000; }
+		virtual uint32_t GetChrRamSize() { return 0x4000; }
+
+		void InitMapper() 
+		{
+			SelectPRGPage(0, 0);
+			SelectCHRPage(0, 0);
+		}
+
+		void WriteRegister(uint16_t addr, uint8_t value)
+		{
+			SelectPRGPage(0, (value >> 4) & 0x03);
+			SelectCHRPage(0, value & 0x03);
+		}
+};
\ No newline at end of file