diff --git a/BizHawk.Emulation/BizHawk.Emulation.csproj b/BizHawk.Emulation/BizHawk.Emulation.csproj
index 51d51f8638..29d6b8d2df 100644
--- a/BizHawk.Emulation/BizHawk.Emulation.csproj
+++ b/BizHawk.Emulation/BizHawk.Emulation.csproj
@@ -95,7 +95,6 @@
     <Compile Include="Consoles\Nintendo\NES\Boards\GxROM.cs">
       <SubType>Code</SubType>
     </Compile>
-    <Compile Include="Consoles\Nintendo\NES\Boards\HVC_CNROM_256K_01.cs" />
     <Compile Include="Consoles\Nintendo\NES\Boards\HVC_UN1ROM.cs" />
     <Compile Include="Consoles\Nintendo\NES\Boards\HVC_UNROM_74HC08.cs" />
     <Compile Include="Consoles\Nintendo\NES\Boards\IC_74x377.cs">
@@ -138,6 +137,7 @@
     <Compile Include="Consoles\Nintendo\NES\Boards\UxROM.cs">
       <SubType>Code</SubType>
     </Compile>
+    <Compile Include="Consoles\Nintendo\NES\Boards\VRC1.cs" />
     <Compile Include="Consoles\Nintendo\NES\Boards\VRC2_4.cs" />
     <Compile Include="Consoles\Nintendo\NES\Boards\VRC3.cs" />
     <Compile Include="Consoles\Nintendo\NES\Boards\VRC6.cs" />
diff --git a/BizHawk.Emulation/Consoles/Nintendo/Docs/compatibility.txt b/BizHawk.Emulation/Consoles/Nintendo/Docs/compatibility.txt
index 0a1da02148..7864f0da70 100644
--- a/BizHawk.Emulation/Consoles/Nintendo/Docs/compatibility.txt
+++ b/BizHawk.Emulation/Consoles/Nintendo/Docs/compatibility.txt
@@ -62,7 +62,7 @@ Open bus and bus conflict emulation is not considered complete or thorough in an
 072	Misc (J)	Nothing
 073	VRC3		Good
 074	Pirate (CN)	Junk
-075	VRC1		Nothing
+075	VRC1		Complete	
 076	Misc (J)	Nothing
 077	Misc (J)	Complete
 078	Misc		Complete
diff --git a/BizHawk.Emulation/Consoles/Nintendo/NES/Boards/VRC1.cs b/BizHawk.Emulation/Consoles/Nintendo/NES/Boards/VRC1.cs
new file mode 100644
index 0000000000..7ec17c8b18
--- /dev/null
+++ b/BizHawk.Emulation/Consoles/Nintendo/NES/Boards/VRC1.cs
@@ -0,0 +1,121 @@
+using System;
+using System.IO;
+using System.Diagnostics;
+
+namespace BizHawk.Emulation.Consoles.Nintendo
+{
+	//AKA mapper 75
+	public class VRC1 : NES.NESBoardBase
+	{
+		//configuration
+		int prg_bank_mask_8k;
+		int chr_bank_mask_4k;
+
+		//state
+		IntBuffer prg_banks_8k = new IntBuffer(4);
+		IntBuffer chr_banks_4k = new IntBuffer(2);
+		int[] chr_regs_4k = new int[2];
+
+		public override void Dispose()
+		{
+			base.Dispose();
+			chr_banks_4k.Dispose();
+		}
+
+		public override void SyncState(Serializer ser)
+		{
+			base.SyncState(ser);
+			ser.Sync("prg_banks_8k", ref prg_banks_8k);
+			ser.Sync("chr_banks_4k", ref chr_banks_4k);
+			for (int i = 0; i < 2; i++) ser.Sync("chr_regs_4k_" + i, ref chr_regs_4k[i]);
+
+			if (ser.IsReader)
+			{
+				SyncCHR();
+			}
+		}
+
+		public override bool Configure(NES.EDetectionOrigin origin)
+		{
+			switch (Cart.board_type)
+			{
+				case "KONAMI-VRC-1":
+					AssertPrg(128); AssertChr(128); AssertVram(0); AssertWram(0);
+					break;
+				default:
+					return false;
+			}
+
+			prg_bank_mask_8k = Cart.prg_size / 8 - 1;
+			chr_bank_mask_4k = Cart.chr_size / 4 - 1;
+
+			SetMirrorType(EMirrorType.Vertical);
+
+			prg_banks_8k[3] = (byte)(0xFF & prg_bank_mask_8k);
+
+			return true;
+		}
+		public override byte ReadPRG(int addr)
+		{
+			int bank_8k = addr >> 13;
+			int ofs = addr & ((1 << 13) - 1);
+			bank_8k = prg_banks_8k[bank_8k];
+			addr = (bank_8k << 13) | ofs;
+			return ROM[addr];
+		}
+
+		public override byte ReadPPU(int addr)
+		{
+			if (addr < 0x2000)
+			{
+				int bank_4k = addr >> 12;
+				int ofs = addr & ((1 << 12) - 1);
+				bank_4k = chr_banks_4k[bank_4k];
+				bank_4k &= chr_bank_mask_4k;
+				addr = (bank_4k << 12) | ofs;
+				return VROM[addr];
+			}
+			else return base.ReadPPU(addr);
+		}
+
+		void SyncCHR()
+		{
+			chr_banks_4k[0] = chr_regs_4k[0] & chr_bank_mask_4k;
+			chr_banks_4k[1] = chr_regs_4k[1] & chr_bank_mask_4k;
+		}
+
+		public override void WritePRG(int addr, byte value)
+		{
+			switch (addr)
+			{
+				case 0x0000: prg_banks_8k[0] = (value & 0xF) & prg_bank_mask_8k; break;
+				case 0x2000: prg_banks_8k[1] = (value & 0xF) & prg_bank_mask_8k; break;
+				case 0x4000: prg_banks_8k[2] = (value & 0xF) & prg_bank_mask_8k; break;
+
+				case 0x1000: //[.... .BAM]   Mirroring, CHR reg high bits
+					if(value.Bit(0))
+						SetMirrorType(NES.NESBoardBase.EMirrorType.Horizontal);
+					else
+						SetMirrorType(NES.NESBoardBase.EMirrorType.Vertical);
+					chr_regs_4k[0] &= 0x0F;
+					chr_regs_4k[1] &= 0x0F;
+					if (value.Bit(1)) chr_regs_4k[0] |= 0x10;
+					if (value.Bit(2)) chr_regs_4k[1] |= 0x10;
+					SyncCHR();
+					break;
+
+				case 0x6000:
+					chr_regs_4k[0] = (chr_regs_4k[0] & 0xF0) | (value & 0x0F);
+					SyncCHR();
+					break;
+				case 0x7000:
+					chr_regs_4k[1] = (chr_regs_4k[1] & 0xF0) | (value & 0x0F);
+					SyncCHR();
+					break;
+
+			}
+		}
+
+
+	}
+}
\ No newline at end of file