diff --git a/desmume/ChangeLog b/desmume/ChangeLog
index 5fc72ea33..1fe3b459b 100644
--- a/desmume/ChangeLog
+++ b/desmume/ChangeLog
@@ -28,6 +28,7 @@
  - Add RTC implementations (not fully) [CrazyMax]
  - Rewrite VRAM mapping control and render (old save states broken) [CrazyMax]
  - Add a GUI hud system; start adding some HUD elements
+ - Add functions for a lid open/close. Holding key (default "Backspace" in Windows port) while game is freeze/non freeze. [CrazyMax]
  Mac OS X port:
  - Fixed: Filenames and paths with unicode characters now work. [Jeff]
  - Fixed: Load state from file button works again. [Jeff]
diff --git a/desmume/src/NDSSystem.cpp b/desmume/src/NDSSystem.cpp
index 6e7b51851..1bfb977c1 100644
--- a/desmume/src/NDSSystem.cpp
+++ b/desmume/src/NDSSystem.cpp
@@ -33,10 +33,15 @@
 #include "ROMReader.h"
 #include "gfx3d.h"
 
+#include "debug.h"
+
 #ifdef _WIN32
 #include "./windows/disView.h"
 #endif
 
+static BOOL LidClosed = FALSE;
+static u8 LidKeyCount = 0;
+
 /* the count of bytes copied from the firmware into memory */
 #define NDS_FW_USER_SETTINGS_MEM_BYTE_COUNT 0x70
 
@@ -489,6 +494,9 @@ void NDS_Reset( void)
    MMU_write16(1, 0x04000130, 0x3FF);
    MMU_write8(1, 0x04000136, 0x43);
 
+    LidClosed = FALSE;
+	LidKeyCount = 0;
+
    /*
     * Setup a copy of the firmware user settings in memory.
     * (this is what the DS firmware would do).
@@ -1590,7 +1598,7 @@ u32 NDS_exec(s32 nb)
 			}
 		}
 		
-		if(MMU.reg_IE[0]&(1<<21))
+		if(MMU.reg_IE[ARMCPU_ARM9]&(1<<21))
 			NDS_makeARM9Int(21);		// GX geometry
 
 		if((MMU.reg_IF[0]&MMU.reg_IE[0]) && (MMU.reg_IME[0]))
@@ -1641,12 +1649,13 @@ void NDS_setPadFromMovie(u16 pad)
 		FIX(pad,9),
 		FIX(pad,10),
 		FIX(pad,11),
-		FIX(pad,12)
+		FIX(pad,12),
+		FIX(pad,13)
 		);
 	#undef FIX
 }
 
-void NDS_setPad(bool R,bool L,bool D,bool U,bool T,bool S,bool B,bool A,bool Y,bool X,bool W,bool E,bool G)
+void NDS_setPad(bool R,bool L,bool D,bool U,bool T,bool S,bool B,bool A,bool Y,bool X,bool W,bool E,bool G, bool F)
 {
 	
 	//this macro is the opposite of what you would expect
@@ -1665,6 +1674,7 @@ void NDS_setPad(bool R,bool L,bool D,bool U,bool T,bool S,bool B,bool A,bool Y,b
 	int w = FIX(W);
 	int e = FIX(E);
 	int g = FIX(G);
+	int f = FIX(F);
 	
 	u16	pad	= (0 |
 					((a) >> 7) |
@@ -1681,17 +1691,31 @@ void NDS_setPad(bool R,bool L,bool D,bool U,bool T,bool S,bool B,bool A,bool Y,b
 	((u16 *)ARM9Mem.ARM9_REG)[0x130>>1] = (u16)pad;
 	((u16 *)MMU.ARM7_REG)[0x130>>1] = (u16)pad;
 
-	u16 padExt = (((u16 *)MMU.ARM7_REG)[0x136>>1] & 0x00F0) |
+	u16 padExt = (((u16 *)MMU.ARM7_REG)[0x136>>1] & 0x0070) |
 						((x) >> 7) |
 						((y) >> 6) |
 						((g) >> 4) |
 						0x0034;
+
+	// todo: mute sound when Lided close
+	if (!f) 
+	{
+		LidKeyCount++;
+		if (LidKeyCount > 50)
+		{
+			LidKeyCount = 0;
+			LidClosed = (!LidClosed) & 0x01;
+			if (!LidClosed) 
+				NDS_makeARM7Int(22);
+		}
+	} else LidKeyCount = 0;
+
+	if (LidClosed) padExt |= 1 << 7;
 	
 	((u16 *)MMU.ARM7_REG)[0x136>>1] = (u16)padExt;
-
 	
 	//put into the format we want for the movie system
-	//RLDUTSBAYXWEG
+	//RLDUTSBAYXWEGF
 	#undef FIX
 	#define FIX(b) (b?1:0)
 
@@ -1708,6 +1732,7 @@ void NDS_setPad(bool R,bool L,bool D,bool U,bool T,bool S,bool B,bool A,bool Y,b
 	w = FIX(W);
 	e = FIX(E);
 	g = FIX(G);
+	f = FIX(F);
 	
 
 	nds.pad =
@@ -1723,7 +1748,8 @@ void NDS_setPad(bool R,bool L,bool D,bool U,bool T,bool S,bool B,bool A,bool Y,b
 		(FIX(x)<<9)|
 		(FIX(w)<<10)|
 		(FIX(e)<<11)|
-		(FIX(g)<<12);
+		(FIX(g)<<12)|
+		(FIX(f)<<13);
 	
 	// TODO: low power IRQ
 }
diff --git a/desmume/src/NDSSystem.h b/desmume/src/NDSSystem.h
index 217486496..f12175f83 100644
--- a/desmume/src/NDSSystem.h
+++ b/desmume/src/NDSSystem.h
@@ -189,7 +189,7 @@ NDS_header * NDS_getROMHeader(void);
  
 void NDS_setTouchPos(u16 x, u16 y);
 void NDS_releaseTouch(void);
-void NDS_setPad(bool R,bool L,bool D,bool U,bool T,bool S,bool B,bool A,bool Y,bool X,bool W,bool E,bool G);
+void NDS_setPad(bool R,bool L,bool D,bool U,bool T,bool S,bool B,bool A,bool Y,bool X,bool W,bool E,bool G, bool F);
 void NDS_setPadFromMovie(u16 pad);
 
 int NDS_LoadROM(const char *filename, int bmtype, u32 bmsize,
diff --git a/desmume/src/windows/inputdx.cpp b/desmume/src/windows/inputdx.cpp
index 0fe73a9a9..3166d9772 100644
--- a/desmume/src/windows/inputdx.cpp
+++ b/desmume/src/windows/inputdx.cpp
@@ -188,6 +188,8 @@ const	char	*DIJoyNames[0x04] = { "JUp", "JDown", "JLeft", "JRight" };
 #define KEY_X 10
 #define KEY_Y 11
 #define KEY_DEBUG 12
+#define KEY_FOLD 13
+#define KEY_POWER 14
 
 
 char	*keyPadNames [MAXKEYPAD] = { "A", "B", "SELECT", "START", 
@@ -415,8 +417,9 @@ void NDS_inputPost(BOOL paused, LPSTR buf)
 	bool W = (buf[keyPad[KEY_L]] & 0x80)!=0;
 	bool E = (buf[keyPad[KEY_R]] & 0x80)!=0;
 	bool G = (buf[keyPad[KEY_DEBUG]] & 0x80)!=0;
+	bool F = (buf[keyPad[KEY_FOLD]] & 0x80)!=0;
 
-	NDS_setPad( R, L, D, U, T, S, B, A, Y, X, W, E, G);
+	NDS_setPad( R, L, D, U, T, S, B, A, Y, X, W, E, G, F);
 }
 
 // TODO
diff --git a/desmume/src/windows/resources.rc b/desmume/src/windows/resources.rc
index f2dccb8d3..7cac1fd72 100644
--- a/desmume/src/windows/resources.rc
+++ b/desmume/src/windows/resources.rc
@@ -1267,7 +1267,7 @@ BEGIN
     EDITTEXT        IDC_EDIT10,268,7,50,14,ES_CENTER | ES_AUTOHSCROLL | ES_READONLY
     EDITTEXT        IDC_EDIT11,248,30,34,14,ES_CENTER | ES_AUTOHSCROLL | ES_READONLY
     EDITTEXT        IDC_EDIT12,285,30,30,14,ES_CENTER | ES_AUTOHSCROLL | ES_READONLY
-    EDITTEXT        IDC_EDIT13,7,127,26,14,ES_CENTER | ES_AUTOHSCROLL | ES_READONLY | WS_DISABLED
+    EDITTEXT        IDC_EDIT13,7,127,26,14,ES_CENTER | ES_AUTOHSCROLL | ES_READONLY
     EDITTEXT        IDC_EDIT14,95,127,26,14,ES_CENTER | ES_AUTOHSCROLL | ES_READONLY | WS_DISABLED
     EDITTEXT        IDC_EDIT15,28,30,34,14,ES_CENTER | ES_AUTOHSCROLL | ES_READONLY | WS_DISABLED
     PUSHBUTTON      "OK",IDOK,205,127,50,14
@@ -1287,7 +1287,7 @@ BEGIN
     LTEXT           "L",IDC_STATIC,60,10,8,8
     LTEXT           "right",IDC_STATIC,63,73,16,8
     LTEXT           "power",IDC_STATIC,36,46,21,8,WS_DISABLED
-    LTEXT           "open/close fold",IDC_STATIC,36,129,50,8,WS_DISABLED
+    LTEXT           "open/close lid",IDC_STATIC,36,129,44,8
     CONTROL         "",IDC_STATIC,"Static",SS_ETCHEDFRAME,95,41,141,77
     LTEXT           "debug",IDC_STATIC,123,129,21,8,WS_DISABLED
 END