From e513eb7cf7f6cca00a4afce352380cc3fea499ef Mon Sep 17 00:00:00 2001
From: goyuken <goyuken@4bbf4f03-6f44-549e-7e59-35d4b0962838>
Date: Mon, 3 Dec 2012 19:05:24 +0000
Subject: [PATCH] nes: implement NROM-368.  doesn't implement any of the other
 variants like CNROM-368.  supports both 48k and 64k modes

---
 BizHawk.Emulation/BizHawk.Emulation.csproj    |  1 +
 .../Consoles/Nintendo/NES/Boards/NROM.cs      |  4 ++
 .../Consoles/Nintendo/NES/Boards/NROM368.cs   | 60 +++++++++++++++++++
 3 files changed, 65 insertions(+)
 create mode 100644 BizHawk.Emulation/Consoles/Nintendo/NES/Boards/NROM368.cs

diff --git a/BizHawk.Emulation/BizHawk.Emulation.csproj b/BizHawk.Emulation/BizHawk.Emulation.csproj
index 567a5e8a92..4bdd8077e1 100644
--- a/BizHawk.Emulation/BizHawk.Emulation.csproj
+++ b/BizHawk.Emulation/BizHawk.Emulation.csproj
@@ -357,6 +357,7 @@
     <Compile Include="Consoles\Nintendo\NES\Boards\NROM.cs">
       <SubType>Code</SubType>
     </Compile>
+    <Compile Include="Consoles\Nintendo\NES\Boards\NROM368.cs" />
     <Compile Include="Consoles\Nintendo\NES\Boards\PxROM_FxROM.cs" />
     <Compile Include="Consoles\Nintendo\NES\Boards\SachenSimple.cs" />
     <Compile Include="Consoles\Nintendo\NES\Boards\Sunsoft1.cs" />
diff --git a/BizHawk.Emulation/Consoles/Nintendo/NES/Boards/NROM.cs b/BizHawk.Emulation/Consoles/Nintendo/NES/Boards/NROM.cs
index f80edb8bde..a11826d2d0 100644
--- a/BizHawk.Emulation/Consoles/Nintendo/NES/Boards/NROM.cs
+++ b/BizHawk.Emulation/Consoles/Nintendo/NES/Boards/NROM.cs
@@ -19,6 +19,10 @@ namespace BizHawk.Emulation.Consoles.Nintendo
 			switch (Cart.board_type)
 			{
 				case "MAPPER000":
+					if (Cart.prg_size <= 32)
+						break;
+					else
+						return false; // NROM-368
 				case "MAPPER219": //adelikat: a version of 3D-Block tries to use this ROM, but plays fine as NROM and 219 is undocumented by Disch
 					break;
 
diff --git a/BizHawk.Emulation/Consoles/Nintendo/NES/Boards/NROM368.cs b/BizHawk.Emulation/Consoles/Nintendo/NES/Boards/NROM368.cs
new file mode 100644
index 0000000000..796bdc5479
--- /dev/null
+++ b/BizHawk.Emulation/Consoles/Nintendo/NES/Boards/NROM368.cs
@@ -0,0 +1,60 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+
+namespace BizHawk.Emulation.Consoles.Nintendo
+{
+	public class NROM368 : NES.NESBoardBase
+	{
+		// not even one actual prototype of this pile of shit exists, and
+		// there are already two incompatible implementations.  pathetic.
+		bool small;
+
+		public override bool Configure(NES.EDetectionOrigin origin)
+		{
+			switch (Cart.board_type)
+			{
+				case "UNIF_NROM-368": // ??
+					break;
+				case "MAPPER000":
+					if (Cart.prg_size == 48 || Cart.prg_size == 64)
+						break;
+					else
+						return false;
+				default:
+					return false;
+			}
+			AssertPrg(48, 64);
+			small = Cart.prg_size == 48;
+			SetMirrorType(Cart.pad_h, Cart.pad_v);
+			return true;
+		}
+
+		public override byte ReadPRG(int addr)
+		{
+			if (small)
+				return ROM[addr + 0x4000];
+			else
+				return ROM[addr];
+		}
+
+		public override byte ReadWRAM(int addr)
+		{
+			if (small)
+				return ROM[addr + 0x2000];
+			else
+				return ROM[addr + 0xa000];
+		}
+
+		public override byte ReadEXP(int addr)
+		{
+			if (addr < 0x800)
+				return NES.DB;
+			if (small)
+				return ROM[addr];
+			else
+				return ROM[addr + 0x8000];
+		}
+	}
+}