From 97345884041655f0638d105a658de700aaa6f5ef Mon Sep 17 00:00:00 2001
From: adelikat <adelikat@tasvideos.org>
Date: Fri, 16 Sep 2016 22:22:34 -0400
Subject: [PATCH] Start unif UNL-TF1201 board, still needs IRQs

---
 .../BizHawk.Emulation.Cores.csproj            |   1 +
 .../NES/Boards/UNIF/UNIF_UNL-TF1201.cs        | 126 ++++++++++++++++++
 2 files changed, 127 insertions(+)
 create mode 100644 BizHawk.Emulation.Cores/Consoles/Nintendo/NES/Boards/UNIF/UNIF_UNL-TF1201.cs

diff --git a/BizHawk.Emulation.Cores/BizHawk.Emulation.Cores.csproj b/BizHawk.Emulation.Cores/BizHawk.Emulation.Cores.csproj
index 72bbd8db22..9aa566bc9d 100644
--- a/BizHawk.Emulation.Cores/BizHawk.Emulation.Cores.csproj
+++ b/BizHawk.Emulation.Cores/BizHawk.Emulation.Cores.csproj
@@ -751,6 +751,7 @@
     <Compile Include="Consoles\Nintendo\NES\Boards\UNIF\UNIF_UNL-AX5705.cs" />
     <Compile Include="Consoles\Nintendo\NES\Boards\UNIF\UNIF_UNL-CC-21.cs" />
     <Compile Include="Consoles\Nintendo\NES\Boards\UNIF\UNIF_UNL-EDU2000.cs" />
+    <Compile Include="Consoles\Nintendo\NES\Boards\UNIF\UNIF_UNL-TF1201.cs" />
     <Compile Include="Consoles\Nintendo\NES\Boards\UNIF\UNIF_UNL_DripGame.cs" />
     <Compile Include="Consoles\Nintendo\NES\Boards\UxROM.cs">
       <SubType>Code</SubType>
diff --git a/BizHawk.Emulation.Cores/Consoles/Nintendo/NES/Boards/UNIF/UNIF_UNL-TF1201.cs b/BizHawk.Emulation.Cores/Consoles/Nintendo/NES/Boards/UNIF/UNIF_UNL-TF1201.cs
new file mode 100644
index 0000000000..148d212e83
--- /dev/null
+++ b/BizHawk.Emulation.Cores/Consoles/Nintendo/NES/Boards/UNIF/UNIF_UNL-TF1201.cs
@@ -0,0 +1,126 @@
+using BizHawk.Common;
+using BizHawk.Common.NumberExtensions;
+
+namespace BizHawk.Emulation.Cores.Nintendo.NES
+{
+	public class UNIF_UNL_TF1201 : NES.NESBoardBase
+	{
+		private byte prg0;
+		private byte prg1;
+		private byte swap;
+		private ByteBuffer chr = new ByteBuffer(8);
+
+		private int prg_mask_8k;
+
+		public override bool Configure(NES.EDetectionOrigin origin)
+		{
+			switch (Cart.board_type)
+			{
+				case "UNIF_UNL-TF1201":
+					break;
+				default:
+					return false;
+			}
+
+			prg_mask_8k = Cart.prg_size / 8 - 1;
+
+			return true;
+		}
+
+		public override void SyncState(Serializer ser)
+		{
+			base.SyncState(ser);
+			ser.Sync("prg0", ref prg0);
+			ser.Sync("prg1", ref prg1);
+			ser.Sync("swap", ref swap);
+			ser.Sync("chr", ref chr);
+		}
+
+		public override void WritePRG(int addr, byte value)
+		{
+			addr += 0x8000;
+			addr = (addr & 0xF003) | ((addr & 0xC) >> 2);
+			if ((addr >= 0xB000) && (addr <= 0xE003))
+			{
+				int ind = (((addr >> 11) - 6) | (addr & 1)) & 7;
+				int sar = ((addr & 2) << 1);
+				chr[ind] = (byte)((chr[ind] & (0xF0 >> sar)) | ((value & 0x0F) << sar));
+			}
+			else switch (addr & 0xF003)
+			{
+				case 0x8000:
+						prg0 = value;
+						break;
+				case 0xA000:
+						prg1 = value;
+						break;
+				case 0x9000:
+						SetMirrorType(value.Bit(0) ? EMirrorType.Horizontal : EMirrorType.Vertical);
+						break;
+				case 0x9001: swap = (byte)(value & 3);
+						break;
+
+				// TODO: IRQ
+				case 0xF000: break;
+				case 0xF002: break;
+				case 0xF001:
+				case 0xF003: break;
+			}
+		}
+
+		public override byte ReadPRG(int addr)
+		{
+			int bank;
+
+			if (addr < 0x2000)
+			{
+				if ((swap & 3) > 0)
+				{
+					bank = prg_mask_8k - 1;
+				}
+				else
+				{
+					bank = prg0;
+				}
+			}
+
+
+			else if (addr < 0x4000)
+			{
+				if ((swap & 3) > 0)
+				{
+					bank = prg0;
+				}
+				else
+				{
+					bank = prg_mask_8k;
+				}
+			}
+
+			else if (addr < 0x6000)
+			{
+				bank = prg0;
+			}
+
+			else
+			{
+				bank = prg_mask_8k;
+			}
+
+
+			return ROM[(bank << 13) + (addr & 0x1FFF)];
+		}
+
+		public override byte ReadPPU(int addr)
+		{
+			if (addr < 0x2000)
+			{
+				int x = (addr >> 10) & 7;
+
+				return VROM[(chr[x] << 10) + (addr & 0x3FF)];
+			}
+
+			return base.ReadPPU(addr);
+		}
+	}
+}