diff --git a/BizHawk.Emulation.Cores/Consoles/Nintendo/NES/Boards/SxROM.cs b/BizHawk.Emulation.Cores/Consoles/Nintendo/NES/Boards/SxROM.cs
index a077180fbb..ea94b47747 100644
--- a/BizHawk.Emulation.Cores/Consoles/Nintendo/NES/Boards/SxROM.cs
+++ b/BizHawk.Emulation.Cores/Consoles/Nintendo/NES/Boards/SxROM.cs
@@ -1,5 +1,6 @@
 using System;
 using BizHawk.Common;
+using BizHawk.Common.NumberExtensions;
 
 namespace BizHawk.Emulation.Cores.Nintendo.NES
 {
@@ -82,7 +83,7 @@ namespace BizHawk.Emulation.Cores.Nintendo.NES
 		int chr_0, chr_1;
 
 		//register 3:
-		int wram_disable;
+		public bool wram_disable;
 		int prg;
 
 		//regenerable state
@@ -177,7 +178,7 @@ namespace BizHawk.Emulation.Cores.Nintendo.NES
 					break;
 				case 3: //E000-FFFF
 					prg = value & 0xF;
-					wram_disable = (value >> 4) & 1;
+					wram_disable = value.Bit(4) ? true : false;
 					break;
 			}
 			//board.NES.LogLine("mapping.. chr_mode={0}, chr={1},{2}", chr_mode, chr_0, chr_1);
@@ -253,6 +254,10 @@ namespace BizHawk.Emulation.Cores.Nintendo.NES
 		//let's make the extra space here, instead of in the main NES to avoid confusion
 		byte[] CIRAM_VS = new byte[0x800];
 
+		//for snrom wram disable
+		public bool _is_snrom;
+		public bool wram_enable = true;
+		public bool chr_wram_enable = true;
 
 		//state
 		public MMC1 mmc1;
@@ -274,7 +279,36 @@ namespace BizHawk.Emulation.Cores.Nintendo.NES
 				mmc1.Write(addr, value);
 				if (!disablemirror)
 					SetMirrorType(mmc1.mirror); //often redundant, but gets the job done
+
+				if (_is_snrom)
+				{
+					if (addr>0x2000 && addr<0x6000)
+					{
+						
+						if ((value & 0x10) == 0)
+							wram_enable = true;
+						else
+							wram_enable = false;
+					}
+				}
 			}
+
+			
+		}
+
+		public override byte ReadWRAM(int addr)
+		{
+			if (_is_snrom)
+			{
+				if (wram_enable && !mmc1.wram_disable && chr_wram_enable)
+					return base.ReadWRAM(addr);	
+				else
+					return NES.DB;	
+			}
+			else
+			{
+				return base.ReadWRAM(addr);
+			}	
 		}
 
 		public override byte ReadPRG(int addr)
@@ -295,6 +329,12 @@ namespace BizHawk.Emulation.Cores.Nintendo.NES
 		{
 			if (addr < 0x2000)
 			{
+				// WRAM enable is tied to ppu a12
+				if (addr.Bit(12))
+					chr_wram_enable = false;
+				else
+					chr_wram_enable = true;
+
 				if (Cart.vram_size != 0)
 					return VRAM[Gen_CHR_Address(addr) & vram_mask];
 				else return VROM[Gen_CHR_Address(addr)];
@@ -343,6 +383,12 @@ namespace BizHawk.Emulation.Cores.Nintendo.NES
 			}
 			else if (addr < 0x2000)
 			{
+				// WRAM enable is tied to ppu a12
+				if (addr.Bit(12))
+					chr_wram_enable = false;
+				else
+					chr_wram_enable = true;
+
 				if (Cart.vram_size != 0)
 					VRAM[Gen_CHR_Address(addr) & vram_mask] = value;
 			}
@@ -354,7 +400,8 @@ namespace BizHawk.Emulation.Cores.Nintendo.NES
 			base.SyncState(ser);
 			mmc1.SyncState(ser);
 			ser.Sync("ppuclock", ref ppuclock);
-
+			ser.Sync("wram enable", ref wram_enable);
+			ser.Sync("chr wram enable", ref chr_wram_enable);
 			if (NES._isVS)
 				ser.Sync("VS_CIRAM", ref CIRAM_VS, false);
 		}
@@ -465,6 +512,9 @@ namespace BizHawk.Emulation.Cores.Nintendo.NES
 					AssertPrg(128, 256); AssertChr(0); AssertVram(8); AssertWram(8);
 					break;
 				case "NES-SNROM": //dragon warrior 2
+					_is_snrom = true;
+					AssertPrg(128, 256); AssertChr(0); AssertVram(8); AssertWram(8);
+					break;
 				case "VIRGIN-SNROM":
 				case "NES-SNWEPROM": // final fantasy 2 (proto)
 					AssertPrg(128, 256); AssertChr(0); AssertVram(8); AssertWram(8);