diff --git a/bin/GameIndex.dbf b/bin/GameIndex.dbf
index 8310f96f82..7f429e6cf1 100644
--- a/bin/GameIndex.dbf
+++ b/bin/GameIndex.dbf
@@ -9269,6 +9269,7 @@ Serial = SLUS-21735
 Name   = Mana Khemia - Alchemists of Al-Revis
 Region = NTSC-U
 Compat = 5
+DMABusyHack = 1
 ---------------------------------------------
 Serial = SLUS-21736
 Name   = Wall-E
diff --git a/pcsx2/Config.h b/pcsx2/Config.h
index 1eeddf48e1..0209dc62e9 100644
--- a/pcsx2/Config.h
+++ b/pcsx2/Config.h
@@ -51,6 +51,7 @@ enum GamefixId
 	Fix_EETiming,
 	Fix_SkipMpeg,
 	Fix_OPHFlag,
+	Fix_DMABusy,
 
 	GamefixId_COUNT
 };
@@ -339,7 +340,8 @@ struct Pcsx2Config
 				IPUWaitHack     :1,		// FFX FMV, makes GIF flush before doing IPU work. Fixes bad graphics overlay.
 				EETimingHack	:1,		// General purpose timing hack.
 				SkipMPEGHack	:1,		// Skips MPEG videos (Katamari and other games need this)
-				OPHFlagHack		:1;		// Skips MPEG videos (Katamari and other games need this)
+				OPHFlagHack		:1,		// Bleach Blade Battlers
+				DMABusyHack		:1;		// Denies writes to the DMAC when it's busy. This is correct behaviour but bad timing can cause problems.
 		BITFIELD_END
 
 		GamefixOptions();
@@ -483,7 +485,8 @@ TraceLogFilters&				SetTraceConfig();
 #define CHECK_IPUWAITHACK			(EmuConfig.Gamefixes.IPUWaitHack)	 // Special Fix For FFX
 #define CHECK_EETIMINGHACK			(EmuConfig.Gamefixes.EETimingHack)	 // Fix all scheduled events to happen in 1 cycle.
 #define CHECK_SKIPMPEGHACK			(EmuConfig.Gamefixes.SkipMPEGHack)	 // Finds sceMpegIsEnd pattern to tell the game the mpeg is finished (Katamari and a lot of games need this)
-#define CHECK_OPHFLAGHACK			(EmuConfig.Gamefixes.OPHFlagHack)
+#define CHECK_OPHFLAGHACK			(EmuConfig.Gamefixes.OPHFlagHack)	 // Bleach Blade Battlers
+#define CHECK_DMABUSYHACK			(EmuConfig.Gamefixes.DMABusyHack)    // Denies writes to the DMAC when it's busy. This is correct behaviour but bad timing can cause problems.
 
 //------------ Advanced Options!!! ---------------
 #define CHECK_VU_OVERFLOW			(EmuConfig.Cpu.Recompiler.vuOverflow)
diff --git a/pcsx2/Pcsx2Config.cpp b/pcsx2/Pcsx2Config.cpp
index 0402d37fe8..ffbf76e410 100644
--- a/pcsx2/Pcsx2Config.cpp
+++ b/pcsx2/Pcsx2Config.cpp
@@ -251,7 +251,8 @@ const wxChar *const tbl_GamefixNames[] =
 	L"IpuWait",
 	L"EETiming",
 	L"SkipMpeg",
-	L"OPHFlag"
+	L"OPHFlag",
+	L"DMABusy"
 };
 
 const __fi wxChar* EnumToString( GamefixId id )
@@ -308,6 +309,7 @@ void Pcsx2Config::GamefixOptions::Set( GamefixId id, bool enabled )
 		case Fix_EETiming:		EETimingHack		= enabled;	break;
 		case Fix_SkipMpeg:		SkipMPEGHack		= enabled;	break;
 		case Fix_OPHFlag:		OPHFlagHack			= enabled;  break;
+		case Fix_DMABusy:		DMABusyHack			= enabled;  break;
 
 		jNO_DEFAULT;
 	}
@@ -328,6 +330,7 @@ bool Pcsx2Config::GamefixOptions::Get( GamefixId id ) const
 		case Fix_EETiming:		return EETimingHack;
 		case Fix_SkipMpeg:		return SkipMPEGHack;
 		case Fix_OPHFlag:		return OPHFlagHack;
+		case Fix_DMABusy:		return DMABusyHack;
 		
 		jNO_DEFAULT
 	}
@@ -348,6 +351,7 @@ void Pcsx2Config::GamefixOptions::LoadSave( IniInterface& ini )
 	IniBitBool( EETimingHack );
 	IniBitBool( SkipMPEGHack );
 	IniBitBool( OPHFlagHack );
+	IniBitBool( DMABusyHack );
 }
 
 Pcsx2Config::Pcsx2Config()
diff --git a/pcsx2/System/SysCoreThread.cpp b/pcsx2/System/SysCoreThread.cpp
index e5c3a29acb..0a9a600b61 100644
--- a/pcsx2/System/SysCoreThread.cpp
+++ b/pcsx2/System/SysCoreThread.cpp
@@ -246,7 +246,7 @@ void SysCoreThread::DoCpuExecute()
 
 void SysCoreThread::ExecuteTaskInThread()
 {
-	Threading::EnableHiresScheduler();
+	Threading::EnableHiresScheduler(); // Note that *something* in SPU2-X and GSdx also set the timer resolution to 1ms.
 	m_sem_event.WaitWithoutYield();
 
 	m_mxcsr_saved.bitmask = _mm_getcsr();
diff --git a/pcsx2/gui/Panels/GameFixesPanel.cpp b/pcsx2/gui/Panels/GameFixesPanel.cpp
index 60cb67d958..e7f02a045f 100644
--- a/pcsx2/gui/Panels/GameFixesPanel.cpp
+++ b/pcsx2/gui/Panels/GameFixesPanel.cpp
@@ -83,6 +83,13 @@ Panels::GameFixesPanel::GameFixesPanel( wxWindow* parent )
 				L" * Growlanser II and III\n"
 				L" * Wizardry"
 			)
+		},
+		{
+			_("Ignore DMAC writes when it is busy."),
+			pxEt( "!ContextTip:Gamefixes:DMA Busy hack",
+				L"Known to affect following games:\n"
+				L" * Mana Khemia 1 (Going \"off campus\")\n"
+			)
 		}
 	};
 
diff --git a/pcsx2/ps2/LegacyDmac.cpp b/pcsx2/ps2/LegacyDmac.cpp
index a0ce46eb8d..931dbd5a5e 100644
--- a/pcsx2/ps2/LegacyDmac.cpp
+++ b/pcsx2/ps2/LegacyDmac.cpp
@@ -429,12 +429,13 @@ __fi bool dmacWrite32( u32 mem, mem32_t& value )
 		}
 	}
 
-	//DMA Writes are invalid to everything except the STR on CHCR when it is busy
-	if((mem & 0xf0))
+	// DMA Writes are invalid to everything except the STR on CHCR when it is busy
+	// There's timing problems with many games. Gamefix time!
+	if( CHECK_DMABUSYHACK && (mem & 0xf0) )
 	{	
 		if((psHu32(mem & ~0xff) & 0x100) && dmacRegs.ctrl.DMAE && !psHu8(DMAC_ENABLER+2)) 
 		{
-			//DevCon.Warning("Write to DMA addr %x while STR is busy! Ignoring", mem);
+			DevCon.Warning("Gamefix: Write to DMA addr %x while STR is busy! Ignoring", mem);
 			return false;
 		}
 	}
diff --git a/pcsx2/windows/DwmSetup.cpp b/pcsx2/windows/DwmSetup.cpp
index 75246ac9e9..9c3c048d7c 100644
--- a/pcsx2/windows/DwmSetup.cpp
+++ b/pcsx2/windows/DwmSetup.cpp
@@ -44,6 +44,7 @@ void pxDwm_Load()
 	{
 		Console.WriteLn( "[Dwm] Desktop Window Manager detected." );
 
+		// Seems to set the Windows timer resolution to 10ms
 		if(FAILED(pDwmEnableMMCSS(TRUE)))
 			Console.WriteLn("[Dwm] DwmEnableMMCSS returned a failure code.");
 	}