Index: MemoryWindow.cpp
===================================================================
--- MemoryWindow.cpp	(revision 3883)
+++ MemoryWindow.cpp	(working copy)
@@ -60,7 +60,8 @@
 
 CMemoryWindow::CMemoryWindow(wxWindow* parent, wxWindowID id,
 		const wxString& title, const wxPoint& pos, const wxSize& size, long style)
-	: wxFrame(parent, id, title, pos, size, style)
+	: wxFrame(parent, id, title, pos, size, style),
+	init(false)
 {    
 	wxBoxSizer* sizerBig   = new wxBoxSizer(wxHORIZONTAL);
 	wxBoxSizer* sizerRight = new wxBoxSizer(wxVERTICAL);
@@ -217,6 +218,34 @@
 	case 0:
 	default:
 		{
+			int n, i;
+			if (!init) {
+				for (n = 0; n < 0x13FFFF; n++) {
+					diffMemory[n] = true;
+				}
+			}
+			FILE* pDumpFile = fopen("MemDiff.txt", "w");
+			for (n = 0; n < 0x13FFFF; n++) {
+				i = Memory::m_pRAM[n*4] << 24;
+				i += Memory::m_pRAM[n*4+1] << 16;
+				i += Memory::m_pRAM[n*4+2] << 8;
+				i += Memory::m_pRAM[n*4+3];
+				if (init & diffMemory[n]) {
+					if (oldMemory[n] == i) {
+						diffMemory[n] = false;
+					}
+					else {
+						fprintf(pDumpFile, "%08X:%08X->%08X\n", n*4, oldMemory[n], i);
+					}
+				}
+				oldMemory[n] = i;
+			}
+			fclose(pDumpFile);
+			if (!init) {
+				init = true;
+			}
+			
+			/*
 			FILE* pDumpFile = fopen(MAINRAM_DUMP_FILE, "wb");
 			if (pDumpFile)
 			{
@@ -227,6 +256,7 @@
 				fclose(pDumpFile);
 				delete pDumpFile;
 			}
+			*/
 		}
 		break;
 
Index: MemoryWindow.h
===================================================================
--- MemoryWindow.h	(revision 3883)
+++ MemoryWindow.h	(working copy)
@@ -69,6 +69,10 @@
 		void OnHostMessage(wxCommandEvent& event);
 		void SetMemoryValue(wxCommandEvent& event);
 		void OnDumpMemory(wxCommandEvent& event);
+
+		u32 oldMemory[0x13FFFF];
+		bool diffMemory[0x13FFFF];
+		bool init;
 };
 
 #endif /*MEMORYWINDOW_*/