diff --git a/BizHawk.Emulation.Cores/Consoles/Nintendo/NES/Boards/SxROM.cs b/BizHawk.Emulation.Cores/Consoles/Nintendo/NES/Boards/SxROM.cs
index c0f88b4310..75ef0e99ad 100644
--- a/BizHawk.Emulation.Cores/Consoles/Nintendo/NES/Boards/SxROM.cs
+++ b/BizHawk.Emulation.Cores/Consoles/Nintendo/NES/Boards/SxROM.cs
@@ -71,7 +71,6 @@ namespace BizHawk.Emulation.Cores.Nintendo.NES
 			A, B1, B2, B3
 		}
 
-
 		//register 0:
 		public int chr_mode;
 		public int prg_mode;
@@ -249,6 +248,12 @@ namespace BizHawk.Emulation.Cores.Nintendo.NES
 		const int pputimeout = 4; // i don't know if this is right, but anything lower will not boot Bill & Ted
 		bool disablemirror = false; // mapper 171: mmc1 without mirroring control
 
+
+		//the VS actually does have 2 KB of nametable address space
+		//let's make the extra space here, instead of in the main NES to avoid confusion
+		byte[] CIRAM_VS = new byte[0x800];
+
+
 		//state
 		public MMC1 mmc1;
 		/// <summary>number of cycles since last WritePRG()</summary>
@@ -294,12 +299,49 @@ namespace BizHawk.Emulation.Cores.Nintendo.NES
 					return VRAM[Gen_CHR_Address(addr) & vram_mask];
 				else return VROM[Gen_CHR_Address(addr)];
 			}
-			else return base.ReadPPU(addr);
-		}
+			else
+			{
+				if (NES._isVS)
+				{
+					addr = addr - 0x2000;
+					if (addr < 0x800)
+					{
+						return NES.CIRAM[addr];
+					}
+					else
+					{
+						return CIRAM_VS[addr - 0x800];
+					}
+				}
+				else
+					return base.ReadPPU(addr);
+			}
+			}
 
 		public override void WritePPU(int addr, byte value)
 		{
-			if (addr < 0x2000)
+
+			if (NES._isVS)
+			{
+				if (addr < 0x2000)
+				{
+					if (VRAM != null)
+						VRAM[Gen_CHR_Address(addr) & vram_mask] = value;
+				}
+				else
+				{
+					addr = addr - 0x2000;
+					if (addr < 0x800)
+					{
+						NES.CIRAM[addr] = value;
+					}
+					else
+					{
+						CIRAM_VS[addr - 0x800] = value;
+					}
+				}
+			}
+			else if (addr < 0x2000)
 			{
 				if (Cart.vram_size != 0)
 					VRAM[Gen_CHR_Address(addr) & vram_mask] = value;
@@ -312,6 +354,9 @@ namespace BizHawk.Emulation.Cores.Nintendo.NES
 			base.SyncState(ser);
 			mmc1.SyncState(ser);
 			ser.Sync("ppuclock", ref ppuclock);
+
+			if (NES._isVS)
+				ser.Sync("VS_CIRAM", ref CIRAM_VS, false);
 		}
 	
 		public override bool Configure(NES.EDetectionOrigin origin)
@@ -320,6 +365,20 @@ namespace BizHawk.Emulation.Cores.Nintendo.NES
 			{
 				case "MAPPER116_HACKY":
 					break;
+				case "MAPPER001_VS":
+					// VS mapper MMC1
+					NES._isVS = true;
+					//update the state of the dip switches
+					//this is only done at power on
+					NES.VS_dips[0] = (byte)(NES.SyncSettings.VSDipswitches.Dip_Switch_1 ? 1 : 0);
+					NES.VS_dips[1] = (byte)(NES.SyncSettings.VSDipswitches.Dip_Switch_1 ? 1 : 0);
+					NES.VS_dips[2] = (byte)(NES.SyncSettings.VSDipswitches.Dip_Switch_1 ? 1 : 0);
+					NES.VS_dips[3] = (byte)(NES.SyncSettings.VSDipswitches.Dip_Switch_1 ? 1 : 0);
+					NES.VS_dips[4] = (byte)(NES.SyncSettings.VSDipswitches.Dip_Switch_1 ? 1 : 0);
+					NES.VS_dips[5] = (byte)(NES.SyncSettings.VSDipswitches.Dip_Switch_1 ? 1 : 0);
+					NES.VS_dips[6] = (byte)(NES.SyncSettings.VSDipswitches.Dip_Switch_1 ? 1 : 0);
+					NES.VS_dips[7] = (byte)(NES.SyncSettings.VSDipswitches.Dip_Switch_1 ? 1 : 0);
+					break;
 				case "MAPPER001":
 					// there's no way to define PRG oversize for mapper001 due to how the MMC1 regs work
 					// so 512KB must mean SUROM or SXROM.  SUROM is more common, so we try that
@@ -445,7 +504,6 @@ namespace BizHawk.Emulation.Cores.Nintendo.NES
 			base.Dispose();
 			if(mmc1 != null) mmc1.Dispose();
 		}
-
 	} //class SxROM