From 0a85b24b880818305a6405c3029e9a045b191cf1 Mon Sep 17 00:00:00 2001
From: adelikat <adelikat@tasvideos.org>
Date: Fri, 28 Oct 2016 12:24:40 -0500
Subject: [PATCH] NesHawk - support board UNIF_BMC-810544-C-A1

---
 .../BizHawk.Emulation.Cores.csproj            |  1 +
 .../NES/Boards/UNIF/UNIF_BMC-810544-C-A1.cs   | 62 +++++++++++++++++++
 2 files changed, 63 insertions(+)
 create mode 100644 BizHawk.Emulation.Cores/Consoles/Nintendo/NES/Boards/UNIF/UNIF_BMC-810544-C-A1.cs

diff --git a/BizHawk.Emulation.Cores/BizHawk.Emulation.Cores.csproj b/BizHawk.Emulation.Cores/BizHawk.Emulation.Cores.csproj
index 569363dae2..fee0ff6fc6 100644
--- a/BizHawk.Emulation.Cores/BizHawk.Emulation.Cores.csproj
+++ b/BizHawk.Emulation.Cores/BizHawk.Emulation.Cores.csproj
@@ -754,6 +754,7 @@
     <Compile Include="Consoles\Nintendo\NES\Boards\UNIF\UNIF_BMC-12-IN-1.cs" />
     <Compile Include="Consoles\Nintendo\NES\Boards\UNIF\UNIF_BMC-190in1.cs" />
     <Compile Include="Consoles\Nintendo\NES\Boards\UNIF\UNIF_BMC-64in1-NR.cs" />
+    <Compile Include="Consoles\Nintendo\NES\Boards\UNIF\UNIF_BMC-810544-C-A1.cs" />
     <Compile Include="Consoles\Nintendo\NES\Boards\UNIF\UNIF_BMC-8157.cs" />
     <Compile Include="Consoles\Nintendo\NES\Boards\UNIF\UNIF_BMC-A65AS.cs" />
     <Compile Include="Consoles\Nintendo\NES\Boards\UNIF\UNIF_BMC-BS-5.cs" />
diff --git a/BizHawk.Emulation.Cores/Consoles/Nintendo/NES/Boards/UNIF/UNIF_BMC-810544-C-A1.cs b/BizHawk.Emulation.Cores/Consoles/Nintendo/NES/Boards/UNIF/UNIF_BMC-810544-C-A1.cs
new file mode 100644
index 0000000000..4fb8e19e80
--- /dev/null
+++ b/BizHawk.Emulation.Cores/Consoles/Nintendo/NES/Boards/UNIF/UNIF_BMC-810544-C-A1.cs
@@ -0,0 +1,62 @@
+using BizHawk.Common;
+using BizHawk.Common.NumberExtensions;
+
+namespace BizHawk.Emulation.Cores.Nintendo.NES
+{
+	public sealed class UNIF_BMC_810544_C_A1 : NES.NESBoardBase
+	{
+		private int latche;
+		private int prg_mask_32k, prg_mask_16k;
+
+		public override bool Configure(NES.EDetectionOrigin origin)
+		{
+			switch (Cart.board_type)
+			{
+				case "UNIF_BMC-810544-C-A1":
+					break;
+				default:
+					return false;
+			}
+
+			prg_mask_32k = Cart.prg_size / 32 - 1;
+			prg_mask_16k = Cart.prg_size / 16 - 1;
+
+			return true;
+		}
+
+		public override void SyncState(Serializer ser)
+		{
+			ser.Sync("latche", ref latche);
+			base.SyncState(ser);
+		}
+
+		public override void WritePRG(int addr, byte value)
+		{
+			latche = addr & 65535;
+			SetMirrorType(addr.Bit(3) ? EMirrorType.Vertical : EMirrorType.Horizontal);
+		}
+
+		public override byte ReadPRG(int addr)
+		{
+			int bank = latche >> 7;
+			if (latche.Bit(6))
+			{
+				return ROM[((bank & prg_mask_32k) << 15) + addr];
+			}
+
+			int bank16 = (bank << 1) | ((latche >> 5) & 1);
+			bank16 &= prg_mask_16k;
+			return ROM[(bank16 << 14) + (addr & 0x3FFF)];
+		}
+
+		public override byte ReadPPU(int addr)
+		{
+			if (addr < 0x2000)
+			{
+				return VROM[((latche & 0x0F) << 13) + addr];
+			}
+
+			return base.ReadPPU(addr);
+		}
+	}
+}