diff --git a/BizHawk.MultiClient/tools/RamSearch.cs b/BizHawk.MultiClient/tools/RamSearch.cs
index 75c3f10fdd..b75198851e 100644
--- a/BizHawk.MultiClient/tools/RamSearch.cs
+++ b/BizHawk.MultiClient/tools/RamSearch.cs
@@ -22,11 +22,8 @@ namespace BizHawk.MultiClient
 		string systemID = "NULL";
 		List<Watch> searchList = new List<Watch>();
 		List<Watch> undoList = new List<Watch>();
-		List<Watch> undoPrevList = new List<Watch>();
 		List<Watch> weededList = new List<Watch>();  //When addresses are weeded out, the new list goes here, before going into searchList
-		List<Watch> prevList = new List<Watch>();
 		List<Watch> redoList = new List<Watch>();
-		List<Watch> redoPrevList = new List<Watch>();
 		private bool IsAWeededList = false; //For deciding whether the weeded list is relevant (0 size could mean all were removed in a legit preview
 		List<ToolStripMenuItem> domainMenuItems = new List<ToolStripMenuItem>();
 		MemoryDomain Domain = new MemoryDomain("NULL", 1, Endian.Little, addr => 0, (a, v) => { });
@@ -401,6 +398,8 @@ namespace BizHawk.MultiClient
 				searchList[x].signed = GetDataType();
 				searchList[x].PeekAddress(Domain);
 				searchList[x].prev = searchList[x].value;
+				searchList[x].original = searchList[x].value;
+				searchList[x].lastsearch = searchList[x].value;
 				if (includeMisalignedToolStripMenuItem.Checked)
 					count++;
 				else
@@ -422,7 +421,6 @@ namespace BizHawk.MultiClient
 			}
 			if (Global.Config.AlwaysExcludeRamWatch)
 				ExcludeRamWatchList();
-			MakePreviousList();
 			SetSpecificValueBoxMaxLength();
 			MessageLabel.Text = "New search started";
 			sortReverse = false;
@@ -430,14 +428,6 @@ namespace BizHawk.MultiClient
 			DisplaySearchList();
 		}
 
-		private void MakePreviousList()
-		{
-			prevList = new List<Watch>();
-
-			for (int x = 0; x < searchList.Count; x++)
-				prevList.Add(new Watch(searchList[x]));
-		}
-
 		private void DisplaySearchList()
 		{
 			SearchListView.ItemCount = searchList.Count;
@@ -524,11 +514,8 @@ namespace BizHawk.MultiClient
 		private void SaveUndo()
 		{
 			undoList.Clear();
-			undoPrevList.Clear();
 			for (int x = 0; x < searchList.Count; x++)
 				undoList.Add(new Watch(searchList[x]));
-			for (int x = 0; x < prevList.Count; x++)
-				undoPrevList.Add(new Watch(prevList[x]));
 			UndotoolStripButton.Enabled = true;
 		}
 
@@ -538,9 +525,7 @@ namespace BizHawk.MultiClient
 			{
 				MessageLabel.Text = MakeAddressString(undoList.Count - searchList.Count) + " restored";
 				redoList = new List<Watch>(searchList);
-				redoPrevList = new List<Watch>(prevList);
 				searchList = new List<Watch>(undoList);
-				prevList = new List<Watch>(undoPrevList);
 				ClearUndo();
 				RedotoolStripButton2.Enabled = true;
 				DisplaySearchList();
@@ -552,14 +537,12 @@ namespace BizHawk.MultiClient
 		private void ClearUndo()
 		{
 			undoList.Clear();
-			undoPrevList.Clear();
 			UndotoolStripButton.Enabled = false;
 		}
 
 		private void ClearRedo()
 		{
 			redoList.Clear();
-			redoPrevList.Clear();
 			RedotoolStripButton2.Enabled = false;
 		}
 
@@ -569,9 +552,7 @@ namespace BizHawk.MultiClient
 			{
 				MessageLabel.Text = MakeAddressString(searchList.Count - redoList.Count) + " removed";
 				undoList = new List<Watch>(searchList);
-				undoPrevList = new List<Watch>(prevList);
 				searchList = new List<Watch>(redoList);
-				prevList = new List<Watch>(redoPrevList);
 				ClearRedo();
 				UndotoolStripButton.Enabled = true;
 				DisplaySearchList();
@@ -620,10 +601,19 @@ namespace BizHawk.MultiClient
 			}
 			if (column == 2)
 			{
-				if (Global.Config.RamSearchPreviousAs == 2) //If prev frame
-					text = searchList[index].PrevToString();
-				else
-					text = prevList[index].ValueToString();
+				switch (Global.Config.RamSearchPreviousAs)
+				{
+					case 0:
+						text = searchList[index].LastSearchToString();
+						break;
+					case 1:
+						text = searchList[index].OriginalToString();
+						break;
+					default:
+					case 2:
+						text = searchList[index].PrevToString();
+						break;
+				}
 			}
 			if (column == 3)
 			{
@@ -675,7 +665,7 @@ namespace BizHawk.MultiClient
 				SaveUndo();
 				MessageLabel.Text = MakeAddressString(searchList.Count - weededList.Count) + " removed";
 				ReplaceSearchListWithWeedOutList();
-				if (Global.Config.RamSearchPreviousAs != 1) MakePreviousList(); //1 = Original value
+				UpdateLastSearch();
 				DisplaySearchList();
 			}
 			else
@@ -745,14 +735,15 @@ namespace BizHawk.MultiClient
 
 		private int GetPreviousValue(int pos)
 		{
-			if (Global.Config.RamSearchPreviousAs == 2) //If Previous frame
-				return searchList[pos].prev;
-			else
+			switch (Global.Config.RamSearchPreviousAs)
 			{
-				if (pos < prevList.Count)
-					return prevList[pos].value;
-				else
-					return 0;
+				case 0:
+					return searchList[pos].lastsearch;
+				case 1:
+					return searchList[pos].original;
+				default:
+				case 2:
+					return searchList[pos].prev;
 			}
 		}
 
@@ -1089,18 +1080,11 @@ namespace BizHawk.MultiClient
 				searchList[x].signed = s;
 			for (int x = 0; x < undoList.Count; x++)
 				undoList[x].signed = s;
-			for (int x = 0; x < undoPrevList.Count; x++)
-				undoPrevList[x].signed = s;
 			for (int x = 0; x < weededList.Count; x++)
 				weededList[x].signed = s;
-			for (int x = 0; x < prevList.Count; x++)
-				prevList[x].signed = s;
 			for (int x = 0; x < redoList.Count; x++)
 				redoList[x].signed = s;
-			for (int x = 0; x < redoPrevList.Count; x++)
-				redoPrevList[x].signed = s;
 			SetSpecificValueBoxMaxLength();
-			MessageLabel.Text = "Data type converted";
 			DisplaySearchList();
 		}
 
@@ -1506,16 +1490,19 @@ namespace BizHawk.MultiClient
 		private void sinceLastSearchToolStripMenuItem_Click(object sender, EventArgs e)
 		{
 			Global.Config.RamSearchPreviousAs = 0;
+			DisplaySearchList();
 		}
 
 		private void sinceLastFrameToolStripMenuItem_Click(object sender, EventArgs e)
 		{
 			Global.Config.RamSearchPreviousAs = 2;
+			DisplaySearchList();
 		}
 
 		private void originalValueToolStripMenuItem_Click(object sender, EventArgs e)
 		{
 			Global.Config.RamSearchPreviousAs = 1;
+			DisplaySearchList();
 		}
 
 		private void definePreviousValueToolStripMenuItem_DropDownOpened(object sender, EventArgs e)
@@ -1643,7 +1630,7 @@ namespace BizHawk.MultiClient
 			SaveUndo();
 			MessageLabel.Text = MakeAddressString(searchList.Count - weededList.Count) + " removed";
 			ReplaceSearchListWithWeedOutList();
-			if (Global.Config.RamSearchPreviousAs != 1) MakePreviousList(); //1 = Original value
+			UpdateLastSearch();
 			DisplaySearchList();
 		}
 
@@ -1691,13 +1678,20 @@ namespace BizHawk.MultiClient
 		{
 			for (int x = 0; x < searchList.Count; x++)
 			{
-				prevList[x].value = searchList[x].value;
+				searchList[x].lastsearch = searchList[x].value;
+				searchList[x].original = searchList[x].value;
 				searchList[x].prev = searchList[x].value;
 			}
 			DisplaySearchList();
 			DoPreview();
 		}
 
+		private void UpdateLastSearch()
+		{
+			for (int x = 0; x < searchList.Count; x++)
+				searchList[x].lastsearch = searchList[x].value;
+		}
+
 		private void SetCurrToPrevtoolStripButton2_Click(object sender, EventArgs e)
 		{
 			CopyValueToPrev();
@@ -2009,10 +2003,17 @@ namespace BizHawk.MultiClient
 			string columnName = SearchListView.Columns[columnToOrder].Text;
 			if (sortedCol.CompareTo(columnName) != 0)
 				sortReverse = false;
-			if (columnName == "Prev" && Global.Config.RamSearchPreviousAs != 2)
-				prevList.Sort((x, y) => x.CompareTo(y, columnName) * (sortReverse ? -1 : 1));
-			else
-				searchList.Sort((x, y) => x.CompareTo(y, columnName) * (sortReverse ? -1 : 1));
+			string previous = "Last Frame";
+			switch (Global.Config.RamSearchPreviousAs)
+			{
+				case 0:
+					previous = "Last Search";
+					break;
+				case 1:
+					previous = "Original";
+					break;
+			}
+			searchList.Sort((x, y) => x.CompareTo(y, columnName, previous) * (sortReverse ? -1 : 1));
 			sortedCol = columnName;
 			sortReverse = !(sortReverse);
 			SearchListView.Refresh();
diff --git a/BizHawk.MultiClient/tools/RamWatch.cs b/BizHawk.MultiClient/tools/RamWatch.cs
index c0d555c721..a7c735b183 100644
--- a/BizHawk.MultiClient/tools/RamWatch.cs
+++ b/BizHawk.MultiClient/tools/RamWatch.cs
@@ -1318,7 +1318,7 @@ namespace BizHawk.MultiClient
 			string columnName = WatchListView.Columns[columnToOrder].Text;
 			if (sortedCol.CompareTo(columnName) != 0)
 				sortReverse = false;
-			watchList.Sort((x, y) => x.CompareTo(y, columnName) * (sortReverse ? -1 : 1));
+			watchList.Sort((x, y) => x.CompareTo(y, columnName, "Last Frame") * (sortReverse ? -1 : 1));
 			sortedCol = columnName;
 			sortReverse = !(sortReverse);
 			WatchListView.Refresh();
diff --git a/BizHawk.MultiClient/tools/Watch.cs b/BizHawk.MultiClient/tools/Watch.cs
index 82882eb759..6b9052f51e 100644
--- a/BizHawk.MultiClient/tools/Watch.cs
+++ b/BizHawk.MultiClient/tools/Watch.cs
@@ -23,6 +23,9 @@ namespace BizHawk.MultiClient
 			notes = "";
 			changecount = 0;
 			prev = 0;
+			original = 0;
+			lastchange = 0;
+			lastsearch = 0;
 		}
 
 		public Watch(Watch w)
@@ -35,6 +38,9 @@ namespace BizHawk.MultiClient
 			notes = w.notes;
 			changecount = w.changecount;
 			prev = w.prev;
+			original = w.original;
+			lastchange = w.lastchange;
+			lastsearch = w.lastsearch;
 		}
 
 		public Watch(int Address, int Value, atype Type, asigned Signed, bool BigEndian, string Notes)
@@ -47,10 +53,16 @@ namespace BizHawk.MultiClient
 			notes = Notes;
 			changecount = 0;
 			prev = 0;
+			original = value;
+			lastchange = 0;
+			lastsearch = value;
 		}
 		public int address { get; set; }
 		public int value { get; set; }         //Current value
 		public int prev { get; set; }
+		public int original { get; set; }
+		public int lastchange { get; set; }
+		public int lastsearch { get; set; }
 		public atype type { get; set; }        //Address type (byte, word, dword, etc
 		public asigned signed { get; set; }    //Signed/Unsigned?
 		public bool bigendian { get; set; }
@@ -177,7 +189,10 @@ namespace BizHawk.MultiClient
 			}
 
 			if (value != prev)
+			{
+				lastchange = prev;
 				changecount++;
+			}
 		}
 
 		private void PokeByte(MemoryDomain domain)
@@ -243,82 +258,79 @@ namespace BizHawk.MultiClient
 
 			StringBuilder str = new StringBuilder(notes);
 			str.Append(": ");
-			str.Append(ValueToString());
+			str.Append(ValToString(value));
 			return str.ToString();
 		}
 
+		public string ValToString(int val)
+		{
+			if (type == atype.SEPARATOR)
+				return "";
+			else
+			{
+				switch (signed)
+				{
+					case asigned.HEX:
+						switch (type)
+						{
+							default:
+							case atype.BYTE:
+								return String.Format("{0:X2}", val);
+							case atype.WORD:
+								return String.Format("{0:X4}", val);
+							case atype.DWORD:
+								return String.Format("{0:X8}", val);
+						}
+					case asigned.SIGNED:
+						switch (type)
+						{
+							default:
+							case atype.BYTE:
+								return ((sbyte)val).ToString();
+							case atype.WORD:
+								return ((short)val).ToString();
+							case atype.DWORD:
+								return ((int)val).ToString();
+						}
+					default:
+					case asigned.UNSIGNED:
+						switch (type)
+						{
+							default:
+							case atype.BYTE:
+								return ((byte)val).ToString();
+							case atype.WORD:
+								return ((ushort)val).ToString();
+							case atype.DWORD:
+								return ((uint)val).ToString();
+						}
+				}
+			}
+		}
+
 		public string ValueToString()
 		{
-			if (type == atype.SEPARATOR)
-				return "";
-			else
-			{
-				switch (signed)
-				{
-					case asigned.HEX:
-						switch (type)
-						{
-							default:
-							case atype.BYTE:
-								return String.Format("{0:X2}", value);
-							case atype.WORD:
-								return String.Format("{0:X4}", value);
-							case atype.DWORD:
-								return String.Format("{0:X8}", value);
-						}
-					case asigned.SIGNED:
-						switch (type)
-						{
-							default:
-							case atype.BYTE:
-								return ((sbyte)value).ToString();
-							case atype.WORD:
-								return ((short)value).ToString();
-							case atype.DWORD:
-								return ((int)value).ToString();
-						}
-					default:
-					case asigned.UNSIGNED:
-					switch (type)
-					{
-						default:
-							case atype.BYTE:
-								return ((byte)value).ToString();
-							case atype.WORD:
-								return ((ushort)value).ToString();
-							case atype.DWORD:
-								return ((uint)value).ToString();
-					}
-				}
-			}
+			return ValToString(value);
 		}
 
 		public string PrevToString()
 		{
-			if (type == atype.SEPARATOR)
-				return "";
-			else
-			{
-				switch (signed)
-				{
-					case asigned.HEX:
-						switch (type)
-						{
-							default:
-							case atype.BYTE:
-								return String.Format("{0:X2}", prev);
-							case atype.WORD:
-								return String.Format("{0:X4}", prev);
-							case atype.DWORD:
-								return String.Format("{0:X8}", prev);
-						}
-					case asigned.SIGNED:
-						return ((sbyte)prev).ToString();
-					default:
-					case asigned.UNSIGNED:
-						return prev.ToString();
-				}
-			}
+			return ValToString(prev);
+		}
+
+		public string OriginalToString()
+		{
+			return ValToString(original);
+		}
+
+		public string LastChangeToString()
+		{
+			return ValToString(lastchange);
+		}
+
+		public string LastSearchToString()
+		{
+			return ValToString(lastsearch);
 		}
 
 		private int CompareAddress(Watch Other)
@@ -351,6 +363,36 @@ namespace BizHawk.MultiClient
 				return 0;
 		}
 
+		private int CompareOriginal(Watch Other)
+		{
+			if (this.original < Other.original)
+				return -1;
+			else if (this.original > Other.original)
+				return 1;
+			else
+				return 0;
+		}
+
+		private int CompareLastChange(Watch Other)
+		{
+			if (this.lastchange < Other.lastchange)
+				return -1;
+			else if (this.lastchange > Other.lastchange)
+				return 1;
+			else
+				return 0;
+		}
+
+		private int CompareLastSearch(Watch Other)
+		{
+			if (this.lastsearch < Other.lastsearch)
+				return -1;
+			else if (this.lastsearch > Other.lastsearch)
+				return 1;
+			else
+				return 0;
+		}
+
 		private int CompareChanges(Watch Other)
 		{
 			if (this.changecount < Other.changecount)
@@ -373,7 +415,7 @@ namespace BizHawk.MultiClient
 				return this.notes.CompareTo(Other.notes);
 		}
 
-		public int CompareTo(Watch Other, string parameter)
+		public int CompareTo(Watch Other, string parameter, string previous)
 		{
 			int compare = 0;
 			if (parameter == "Address")
@@ -387,7 +429,19 @@ namespace BizHawk.MultiClient
 						compare = CompareChanges(Other);
 						if (compare == 0)
 						{
-							compare = ComparePrev(Other);
+							switch (previous)
+							{
+								case "Last Search":
+									compare = CompareLastSearch(Other);
+									break;
+								case "Original":
+									compare = CompareOriginal(Other);
+									break;
+								case "Last Frame":
+								default:
+									compare = ComparePrev(Other);
+									break;
+							}
 							if (compare == 0)
 								compare = CompareNotes(Other);
 						}
@@ -406,7 +460,19 @@ namespace BizHawk.MultiClient
 						compare = CompareChanges(Other);
 						if (compare == 0)
 						{
-							compare = ComparePrev(Other);
+							switch (previous)
+							{
+								case "Last Search":
+									compare = CompareLastSearch(Other);
+									break;
+								case "Original":
+									compare = CompareOriginal(Other);
+									break;
+								case "Last Frame":
+								default:
+									compare = ComparePrev(Other);
+									break;
+							}
 							if (compare == 0)
 								compare = CompareNotes(Other);
 						}
@@ -416,7 +482,19 @@ namespace BizHawk.MultiClient
 
 			else if (parameter == "Prev")
 			{
-				compare = ComparePrev(Other);
+				switch (previous)
+				{
+					case "Last Search":
+						compare = CompareLastSearch(Other);
+						break;
+					case "Original":
+						compare = CompareOriginal(Other);
+						break;
+					case "Last Frame":
+					default:
+						compare = ComparePrev(Other);
+						break;
+				}
 				if (compare == 0)
 				{
 					compare = CompareAddress(Other);
@@ -444,7 +522,19 @@ namespace BizHawk.MultiClient
 						compare = CompareValue(Other);
 						if (compare == 0)
 						{
-							compare = ComparePrev(Other);
+							switch (previous)
+							{
+								case "Last Search":
+									compare = CompareLastSearch(Other);
+									break;
+								case "Original":
+									compare = CompareOriginal(Other);
+									break;
+								case "Last Frame":
+								default:
+									compare = ComparePrev(Other);
+									break;
+							}
 							if (compare == 0)
 								compare = CompareNotes(Other);
 						}
@@ -465,7 +555,19 @@ namespace BizHawk.MultiClient
 						{
 							compare = CompareChanges(Other);
 							if (compare == 0)
-								compare = ComparePrev(Other);
+								switch (previous)
+								{
+									case "Last Search":
+										compare = CompareLastSearch(Other);
+										break;
+									case "Original":
+										compare = CompareOriginal(Other);
+										break;
+									case "Last Frame":
+									default:
+										compare = ComparePrev(Other);
+										break;
+								}
 						}
 					}
 				}