change the IEmulator saveram interface.

i don't like doing this, but there were already two emus with special bandaid logic in MainForm.cs
i hope this doesn't break something, but if it does i'll fix it

BizHawk.Emulation/Consoles/Atari/2600/Atari2600.cs

@@ -64,9 +64,12 @@ namespace BizHawk
 		private int _lagcount = 0;
 		private int _frame = 0;
 
-		public byte[] ReadSaveRam { get { return new byte[0]; } }
-		public bool DeterministicEmulation { get; set; }
+		public byte[] ReadSaveRam() { return null; }
+		public void StoreSaveRam(byte[] data) { }
+		public void ClearSaveRam() { }
 		public bool SaveRamModified { get; set; }
+
+		public bool DeterministicEmulation { get; set; }
 		public void SaveStateText(TextWriter writer) { SyncState(Serializer.CreateTextWriter(writer)); }
 		public void LoadStateText(TextReader reader) { SyncState(Serializer.CreateTextReader(reader)); }
 		public void SaveStateBinary(BinaryWriter bw) { SyncState(Serializer.CreateBinaryWriter(bw)); }
@@ -80,7 +83,7 @@ namespace BizHawk
 			bw.Flush();
 			return ms.ToArray();
 		}
-		
+
 		private IList<MemoryDomain> memoryDomains;
 		public IList<MemoryDomain> MemoryDomains { get { return memoryDomains; } }
 		public MemoryDomain MainMemory { get { return memoryDomains[0]; } }

BizHawk.Emulation/Consoles/Calculator/TI83.cs

@@ -478,7 +478,9 @@ namespace BizHawk.Emulation.Consoles.Calculator
 
 		public bool DeterministicEmulation { get { return true; } set { } }
 
-		public byte[] ReadSaveRam { get { return null; } }
+		public byte[] ReadSaveRam() { return null; }
+		public void StoreSaveRam(byte[] data) { }
+		public void ClearSaveRam() { }
 		public bool SaveRamModified
 		{
 			get { return false; }

BizHawk.Emulation/Consoles/Coleco/ColecoVision.cs

@@ -70,9 +70,12 @@ namespace BizHawk.Emulation.Consoles.Coleco
 		private int _lagcount = 0;
 		private int _frame = 0;
 
-		public byte[] ReadSaveRam { get { return new byte[0]; } }
-		public bool DeterministicEmulation { get; set; }
+		public byte[] ReadSaveRam() { return null; }
+		public void StoreSaveRam(byte[] data) { }
+		public void ClearSaveRam() { }
 		public bool SaveRamModified { get; set; }
+
+		public bool DeterministicEmulation { get; set; }
 		public void SaveStateText(TextWriter writer) { SyncState(Serializer.CreateTextWriter(writer)); }
 		public void LoadStateText(TextReader reader) { SyncState(Serializer.CreateTextReader(reader)); }
 		public void SaveStateBinary(BinaryWriter bw) { SyncState(Serializer.CreateBinaryWriter(bw)); }

BizHawk.Emulation/Consoles/Intellivision/Intellivision.cs

@@ -117,8 +117,10 @@ namespace BizHawk.Emulation.Consoles.Intellivision
 
 		public bool DeterministicEmulation { get; set; }
 
-		public byte[] ReadSaveRam { get { return null; } }
 
+		public byte[] ReadSaveRam() { return null; }
+		public void StoreSaveRam(byte[] data) { }
+		public void ClearSaveRam() { }
 		public bool SaveRamModified
 		{
 			get { return false; }

BizHawk.Emulation/Consoles/Nintendo/Gameboy/Gambatte.cs

@@ -137,21 +137,18 @@ namespace BizHawk.Emulation.Consoles.GB
 
 		public bool DeterministicEmulation { get; set; }
 
-		public byte[] ReadSaveRam
+		public byte[] ReadSaveRam()
 		{
-			get
-			{
-				int length = LibGambatte.gambatte_savesavedatalength(GambatteState);
+			int length = LibGambatte.gambatte_savesavedatalength(GambatteState);
 
-				if (length > 0)
-				{
-					byte[] ret = new byte[length];
-					LibGambatte.gambatte_savesavedata(GambatteState, ret);
-					return ret;
-				}
-				else
-					return new byte[0];
+			if (length > 0)
+			{
+				byte[] ret = new byte[length];
+				LibGambatte.gambatte_savesavedata(GambatteState, ret);
+				return ret;
 			}
+			else
+				return new byte[0];
 		}
 
 		public void StoreSaveRam(byte[] data)

BizHawk.Emulation/Consoles/Nintendo/NES/NES.cs

@@ -303,14 +303,29 @@ namespace BizHawk.Emulation.Consoles.Nintendo
 
 		public bool DeterministicEmulation { get { return true; } set { } }
 
-		public byte[] ReadSaveRam
+
+
+		public byte[] ReadSaveRam()
 		{
-			get
-			{
-				if (board == null) return null;
-				return board.SaveRam;
-			}
+			if (board == null || board.SaveRam == null)
+				return null;
+			return (byte[])board.SaveRam.Clone();	
 		}
+		public void StoreSaveRam(byte[] data)
+		{
+			if (board == null || board.SaveRam == null)
+				return;
+			Array.Copy(data, board.SaveRam, data.Length);
+		}
+
+		public void ClearSaveRam()
+		{
+			if (board == null || board.SaveRam == null)
+				return;
+			for (int i = 0; i < board.SaveRam.Length; i++)
+				board.SaveRam[i] = 0;
+		}
+
 		public bool SaveRamModified
 		{
 			get { if (board == null) return false; if (board.SaveRam == null) return false; return true; }

BizHawk.Emulation/Consoles/Nintendo/SNES/LibsnesCore.cs

@@ -414,7 +414,11 @@ namespace BizHawk.Emulation.Consoles.Nintendo.SNES
 			}
 		}
 
-		public byte[] ReadSaveRam { get { return snes_get_memory_data_read(LibsnesDll.SNES_MEMORY.CARTRIDGE_RAM); } }
+		public byte[] ReadSaveRam()
+		{ 
+			return snes_get_memory_data_read(LibsnesDll.SNES_MEMORY.CARTRIDGE_RAM);
+		}
+
 		public static byte[] snes_get_memory_data_read(LibsnesDll.SNES_MEMORY id)
 		{
 			var size = (int)LibsnesDll.snes_get_memory_size(id);
@@ -433,6 +437,12 @@ namespace BizHawk.Emulation.Consoles.Nintendo.SNES
 			Marshal.Copy(data, 0, emudata, size);
 		}
 
+		public void ClearSaveRam()
+		{
+			byte[] cleardata = new byte[(int)LibsnesDll.snes_get_memory_size(LibsnesDll.SNES_MEMORY.CARTRIDGE_RAM)];
+			StoreSaveRam(cleardata);
+		}
+
 		public void ResetFrameCounter() { timeFrameCounter = 0; }
 		public void SaveStateText(TextWriter writer)
 		{

BizHawk.Emulation/Consoles/PC Engine/PCEngine.cs

@@ -275,11 +275,9 @@ namespace BizHawk.Emulation.Consoles.TurboGrafx
 		public string Region { get; set; }
 		public bool DeterministicEmulation { get; set; }
 
-		public byte[] ReadSaveRam
-		{
-			get { return BRAM; }
-		}
-
+		public byte[] ReadSaveRam() { return (byte[])BRAM.Clone(); }
+		public void StoreSaveRam(byte[] data) { Array.Copy(data, BRAM, data.Length); }
+		public void ClearSaveRam() { BRAM = new byte[BRAM.Length]; }
 		public bool SaveRamModified { get; set; }
 
 		public void SaveStateText(TextWriter writer)

BizHawk.Emulation/Consoles/Sega/Genesis/Cart/SaveRAM.cs

@@ -23,10 +23,9 @@ namespace BizHawk.Emulation.Consoles.Sega
             }
         }
 
-        public byte[] ReadSaveRam // TODO if you're going to rename this to ReadSaveRam, refactor it to be a method, not a property.
-		{
-            get { return SaveRAM; }
-		}
+		public byte[] ReadSaveRam() { return (byte[])SaveRAM.Clone(); }
+		public void StoreSaveRam(byte[] data) { Array.Copy(data, SaveRAM, data.Length); }
+		public void ClearSaveRam() { SaveRAM = new byte[SaveRAM.Length]; }
 
 		public bool SaveRamModified { get; set; }
     }

BizHawk.Emulation/Consoles/Sega/SMS/SMS.cs

@@ -31,7 +31,9 @@ namespace BizHawk.Emulation.Consoles.Sega
 		public byte[] SaveRAM = new byte[BankSize * 2];
 		public byte SaveRamBank;
 
-		public byte[] ReadSaveRam { get { return SaveRAM; } }
+		public byte[] ReadSaveRam() { return (byte[])SaveRAM.Clone(); }
+		public void StoreSaveRam(byte[] data) { Array.Copy(data, SaveRAM, data.Length); }
+		public void ClearSaveRam() { SaveRAM = new byte[SaveRAM.Length]; }
 		public bool SaveRamModified { get; set; }
 
 		// Machine resources

BizHawk.Emulation/Interfaces/Base Implementations/NullEmulator.cs

@@ -41,7 +41,9 @@ namespace BizHawk
 		public int LagCount { get { return 0; } set { return; } }
 		public bool IsLagFrame { get { return false; } }
 
-		public byte[] ReadSaveRam { get { return new byte[0]; } }
+		public byte[] ReadSaveRam() { return null; }
+		public void StoreSaveRam(byte[] data) { }
+		public void ClearSaveRam() { }
 		public bool DeterministicEmulation { get; set; }
 		public bool SaveRamModified { get; set; }
 		public void SaveStateText(TextWriter writer) { }

BizHawk.Emulation/Interfaces/IEmulator.cs

@@ -21,11 +21,21 @@ namespace BizHawk
 		bool DeterministicEmulation { get; set; }
 
 		/// <summary>
-		/// Don't edit this data, it may be useless as it may be a copy or some compiled data.
-		/// use StoreSaveRam if you want to store sram into the core.
-		/// Well, this rule is being violated. This comment is just a reminder that this is a bad architecture
+		/// return a copy of the saveram.  editing it won't do you any good unless you later call StoreSaveRam()
 		/// </summary>
-		byte[] ReadSaveRam { get; }
+		byte[] ReadSaveRam();
+
+		/// <summary>
+		/// store new saveram to the emu core.  the data should be the same size as the return from ReadSaveRam()
+		/// </summary>
+		void StoreSaveRam(byte[] data);
+
+		/// <summary>
+		/// reset saveram to a standard initial state
+		/// </summary>
+		void ClearSaveRam();
+
+
 		bool SaveRamModified { get; set; }
 
 		void ResetFrameCounter();

BizHawk.MultiClient/MainForm.cs

@@ -1555,6 +1555,7 @@ namespace BizHawk.MultiClient
 			//zero says: this is sort of sketchy... but this is no time for rearchitecting
 			try
 			{
+				/*
 				var sram = new byte[Global.Emulator.ReadSaveRam.Length];
 				using (var reader = new BinaryReader(new FileStream(PathManager.SaveRamPath(Global.Game), FileMode.Open, FileAccess.Read)))
 					reader.Read(sram, 0, Global.Emulator.ReadSaveRam.Length);
@@ -1564,6 +1565,11 @@ namespace BizHawk.MultiClient
 					((Gameboy)Global.Emulator).StoreSaveRam(sram);
 				else
 					Array.Copy(sram, Global.Emulator.ReadSaveRam, Global.Emulator.ReadSaveRam.Length);
+				 */
+				var sram = new byte[Global.Emulator.ReadSaveRam().Length];
+				using (var reader = new BinaryReader(new FileStream(PathManager.SaveRamPath(Global.Game), FileMode.Open, FileAccess.Read)))
+					reader.Read(sram, 0, sram.Length);
+				Global.Emulator.StoreSaveRam(sram);
 			}
 			catch { }
 		}
@@ -1590,8 +1596,13 @@ namespace BizHawk.MultiClient
 				f.Directory.Create();
 
 			var writer = new BinaryWriter(new FileStream(path, FileMode.Create, FileAccess.Write));
-			int len = Util.SaveRamBytesUsed(Global.Emulator.ReadSaveRam);
-			writer.Write(Global.Emulator.ReadSaveRam, 0, len);
+
+			var saveram = Global.Emulator.ReadSaveRam();
+
+			// this assumes that the default state of the core's sram is 0-filled, so don't do
+			// int len = Util.SaveRamBytesUsed(saveram);
+			int len = saveram.Length;
+			writer.Write(saveram, 0, len);
 			writer.Close();
 		}
 
@@ -3432,6 +3443,7 @@ namespace BizHawk.MultiClient
 
 			try
 			{
+				/*
 				var sram = new byte[Global.Emulator.ReadSaveRam.Length];
 				if (Global.Emulator is LibsnesCore)
 					((LibsnesCore)Global.Emulator).StoreSaveRam(sram);
@@ -3439,6 +3451,8 @@ namespace BizHawk.MultiClient
 					((Gameboy)Global.Emulator).ClearSaveRam();
 				else
 					Array.Copy(sram, Global.Emulator.ReadSaveRam, Global.Emulator.ReadSaveRam.Length);
+				 */
+				Global.Emulator.ClearSaveRam();
 			}
 			catch { }
 		}