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
index 148d212e83..2b4dbd0af3 100644
--- 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
@@ -1,126 +1,153 @@
-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);
-		}
-	}
-}
+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 bool IRQa;
+		private int IRQCount;
+		private int IRQpre = 341;
+
+		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;
+
+				case 0xF000: IRQCount = (IRQCount & 0xF0) | (value & 0x0F); break;
+				case 0xF002: IRQCount = (IRQCount & 0x0F) | (value << 4 & 0xF0); break;
+				case 0xF001:
+				case 0xF003:
+						IRQa = value.Bit(1);
+						IRQSignal = false;
+						if (NES.ppu.ppuphase !=PPU.PPUPHASE.VBL)
+							IRQCount -= 8;
+						break;
+			}
+		}
+
+		public override void ClockPPU()
+		{
+			if ((NES.ppu.ppuphase != PPU.PPUPHASE.VBL))// && IRQa)
+			{
+				IRQpre--;
+				if (IRQpre==0)
+				{
+					IRQCount++;
+					IRQpre = 341;
+					if (IRQCount == 237)
+					{
+						IRQSignal = IRQa;
+					}
+					if (IRQCount == 256)
+						IRQCount = 0;
+						
+				}
+				
+			}
+				
+		}
+
+		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)
+			{
+				bank = prg1;
+			}
+			else if (addr < 0x6000)
+			{
+				if ((swap & 3) > 0)
+				{
+					bank = prg0;
+				}
+				else
+				{
+					bank = prg_mask_8k-1;
+				}
+			}
+			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);
+		}
+	}
+}