diff --git a/desmume/src/MMU.cpp b/desmume/src/MMU.cpp
index 047a4f42e..9e3b75650 100644
--- a/desmume/src/MMU.cpp
+++ b/desmume/src/MMU.cpp
@@ -1429,7 +1429,7 @@ u32 MMU_readFromGC()
 		// --- Ninja SD commands end ---------------------------------
 
 		default:
-			INFO("READ CARD command: %02X%02X%02X%02X%02X%02X%02X%02X\t", 
+			INFO("READ CARD command: %02X%02X%02X%02X% 02X%02X%02X%02X\t", 
 					card.command[0], card.command[1], card.command[2], card.command[3],
 					card.command[4], card.command[5], card.command[6], card.command[7]);
 			INFO("FROM: %08X\n", (PROCNUM ? NDS_ARM7:NDS_ARM9).instruct_adr);
@@ -2398,6 +2398,7 @@ void FASTCALL _MMU_ARM9_write08(u32 adr, u8 val)
 			case REG_AUXSPIDATA:
 				if(val!=0) MMU.AUX_SPI_CMD = val & 0xFF;
 				T1WriteWord(MMU.MMU_MEM[ARMCPU_ARM9][(REG_AUXSPIDATA >> 20) & 0xff], REG_AUXSPIDATA & 0xfff, MMU_new.backupDevice.data_command((u8)val,ARMCPU_ARM9));
+				MMU.AUX_SPI_CNT &= ~0x80; //remove busy flag
 				return;
 
 			case REG_WRAMCNT:	
@@ -2741,6 +2742,7 @@ void FASTCALL _MMU_ARM9_write16(u32 adr, u16 val)
 
 				//T1WriteWord(MMU.MMU_MEM[ARMCPU_ARM7][(REG_AUXSPIDATA >> 20) & 0xff], REG_AUXSPIDATA & 0xfff, bm_transfer(&MMU.bupmem, val));
 				T1WriteWord(MMU.MMU_MEM[ARMCPU_ARM9][(REG_AUXSPIDATA >> 20) & 0xff], REG_AUXSPIDATA & 0xfff, MMU_new.backupDevice.data_command((u8)val,ARMCPU_ARM9));
+				MMU.AUX_SPI_CNT &= ~0x80; //remove busy flag
 				return;
 
 			case REG_DISPA_BG0CNT :
@@ -3691,6 +3693,7 @@ void FASTCALL _MMU_ARM7_write08(u32 adr, u8 val)
 			case REG_AUXSPIDATA:
 				if(val!=0) MMU.AUX_SPI_CMD = val & 0xFF;
 				T1WriteWord(MMU.MMU_MEM[ARMCPU_ARM7][(REG_AUXSPIDATA >> 20) & 0xff], REG_AUXSPIDATA & 0xfff, MMU_new.backupDevice.data_command((u8)val,ARMCPU_ARM7));
+				MMU.AUX_SPI_CNT &= ~0x80; //remove busy flag
 				return;
 		}
 		MMU.MMU_MEM[ARMCPU_ARM7][adr>>20][adr&MMU.MMU_MASK[ARMCPU_ARM7][adr>>20]]=val;
@@ -3774,6 +3777,7 @@ void FASTCALL _MMU_ARM7_write16(u32 adr, u16 val)
 
 				//T1WriteWord(MMU.MMU_MEM[ARMCPU_ARM7][(REG_AUXSPIDATA >> 20) & 0xff], REG_AUXSPIDATA & 0xfff, bm_transfer(&MMU.bupmem, val));
 				T1WriteWord(MMU.MMU_MEM[ARMCPU_ARM7][(REG_AUXSPIDATA >> 20) & 0xff], REG_AUXSPIDATA & 0xfff, MMU_new.backupDevice.data_command((u8)val,ARMCPU_ARM7));
+				MMU.AUX_SPI_CNT &= ~0x80; //remove busy flag
 			return;
 
 			case REG_SPICNT :
diff --git a/desmume/src/mc.cpp b/desmume/src/mc.cpp
index b9b291172..33b2bb078 100644
--- a/desmume/src/mc.cpp
+++ b/desmume/src/mc.cpp
@@ -458,6 +458,7 @@ u8 BackupDevice::data_command(u8 val, int cpu)
 				ensure(addr+1);
 				if(com == BM_CMD_READLOW)
 				{
+					//printf("READ ADR: %08X\n",addr);
 					val = data[addr];
 					//flushPending = true; //is this a good idea? it may slow stuff down, but it is helpful for debugging
 					lazyFlushPending = true; //lets do this instead
@@ -465,9 +466,13 @@ u8 BackupDevice::data_command(u8 val, int cpu)
 				}
 				else 
 				{
-					data[addr] = val;
-					flushPending = true;
-					//printf("writ: %08X\n",addr);
+					if(write_enable)
+					{
+						//printf("WRITE ADR: %08X\n",addr);
+						data[addr] = val;
+						flushPending = true;
+						//printf("writ: %08X\n",addr);
+					}
 				}
 				addr++;
 
@@ -477,8 +482,8 @@ u8 BackupDevice::data_command(u8 val, int cpu)
 	else if(com == BM_CMD_READSTATUS)
 	{
 		//handle request to read status
-		//LOG("Backup Memory Read Status: %02X\n", mc->write_enable << 1);
-		return (write_enable << 1);
+		LOG("Backup Memory Read Status: %02X\n", mc->write_enable << 1);
+		return (write_enable << 1) | (3<<2);
 	}
 	else
 	{
@@ -488,15 +493,16 @@ u8 BackupDevice::data_command(u8 val, int cpu)
 			case 0: break; //??
 
 			case 8:
+				printf("COMMAND%c: Unverified Backup Memory command: %02X FROM %08X\n",(cpu==ARMCPU_ARM9)?'9':'7',val, (cpu==ARMCPU_ARM9)?NDS_ARM9.instruct_adr:NDS_ARM7.instruct_adr);
 				val = 0xAA;
 				break;
-			
+
 			case BM_CMD_WRITEDISABLE:
 				write_enable = FALSE;
 				break;
 							
 			case BM_CMD_READSTATUS:
-				com = BM_CMD_READSTATUS;
+				com = (write_enable << 1) | (3<<2);
 				break;
 
 			case BM_CMD_WRITEENABLE:
diff --git a/desmume/src/windows/DeSmuME_2010.vcxproj b/desmume/src/windows/DeSmuME_2010.vcxproj
index 1ebf88efb..8b8b32f63 100644
--- a/desmume/src/windows/DeSmuME_2010.vcxproj
+++ b/desmume/src/windows/DeSmuME_2010.vcxproj
@@ -419,6 +419,7 @@
   </ItemDefinitionGroup>
   <ItemGroup>
     <ClCompile Include="..\addons.cpp" />
+    <ClCompile Include="..\addons\piano.cpp" />
     <ClCompile Include="..\aggdraw.cpp" />
     <ClCompile Include="..\arm_instructions.cpp" />
     <ClCompile Include="..\armcpu.cpp" />
diff --git a/desmume/src/windows/gbaslot_config.cpp b/desmume/src/windows/gbaslot_config.cpp
index 30dfdb725..f73830577 100644
--- a/desmume/src/windows/gbaslot_config.cpp
+++ b/desmume/src/windows/gbaslot_config.cpp
@@ -256,7 +256,7 @@ INT_PTR CALLBACK GbaSlotGBAgame(HWND dialog, UINT msg,WPARAM wparam,LPARAM lpara
 
 							// TODO: add another gba file formats and archs (??wtf??)
 							const char* fileFilter =	"GameBoy Advance ROM (*.gba)\0*.gba\0"
-														"NDS ROM (for nitroFS roms) (*.nds)\0*.nds\0"
+														"NDS ROM (for nitroFS roms) (*.nds,*.srl)\0*.nds;*.srl\0"
 														"Any file (*.*)\0*.*\0";
 							
                             ofn.lpstrFilter = fileFilter;
diff --git a/desmume/src/windows/main.cpp b/desmume/src/windows/main.cpp
index 7487a2234..81ba24429 100644
--- a/desmume/src/windows/main.cpp
+++ b/desmume/src/windows/main.cpp
@@ -3304,8 +3304,8 @@ LRESULT OpenFile()
 	ofn.hwndOwner = hwnd;
 
 	ofn.lpstrFilter = 
-		"All Usable Files (*.nds, *.ds.gba, *.zip, *.7z, *.rar, *.bz2)\0*.nds;*.ds.gba;*.zip;*.7z;*.rar;*.bz2\0"
-		"NDS ROM file (*.nds)\0*.nds\0"
+		"All Usable Files (*.nds, *.ds.gba, *.srl, *.zip, *.7z, *.rar, *.bz2)\0*.nds;*.ds.gba;*.srl;*.zip;*.7z;*.rar;*.bz2\0"
+		"NDS ROM file (*.nds,*.srl)\0*.nds;*.srl\0"
 		"NDS/GBA ROM File (*.ds.gba)\0*.ds.gba\0"
 		"Zipped NDS ROM file (*.zip)\0*.zip\0"
 		"7Zipped NDS ROM file (*.7z)\0*.7z\0"