diff --git a/Source/Core/Core/BootManager.cpp b/Source/Core/Core/BootManager.cpp
index 7bf601afbf..ee78f0b17f 100644
--- a/Source/Core/Core/BootManager.cpp
+++ b/Source/Core/Core/BootManager.cpp
@@ -49,7 +49,8 @@ struct ConfigCache
 {
 	bool valid, bCPUThread, bSkipIdle, bEnableFPRF, bMMU, bDCBZOFF, m_EnableJIT, bDSPThread,
 	     bVBeamSpeedHack, bSyncGPU, bFastDiscSpeed, bMergeBlocks, bDSPHLE, bHLE_BS2, bTLBHack, bProgressive;
-	int iCPUCore, Volume;
+	CPUBackend iCPUCore;
+	int Volume;
 	int iWiimoteSource[MAX_BBMOTES];
 	SIDevices Pads[MAX_SI_CHANNELS];
 	unsigned int framelimit, frameSkip;
@@ -154,7 +155,7 @@ bool BootCore(const std::string& _rFilename)
 		core_section->Get("DSPHLE",           &StartUp.bDSPHLE, StartUp.bDSPHLE);
 		core_section->Get("DSPThread",        &StartUp.bDSPThread, StartUp.bDSPThread);
 		core_section->Get("GFXBackend",       &StartUp.m_strVideoBackend, StartUp.m_strVideoBackend);
-		core_section->Get("CPUCore",          &StartUp.iCPUCore, StartUp.iCPUCore);
+		core_section->Get("CPUCore",          (int*)&StartUp.iCPUCore, StartUp.iCPUCore);
 		core_section->Get("HLE_BS2",          &StartUp.bHLE_BS2, StartUp.bHLE_BS2);
 		core_section->Get("ProgressiveScan",  &StartUp.bProgressive, StartUp.bProgressive);
 		if (core_section->Get("FrameLimit",   &SConfig::GetInstance().m_Framelimit, SConfig::GetInstance().m_Framelimit))
diff --git a/Source/Core/Core/ConfigManager.cpp b/Source/Core/Core/ConfigManager.cpp
index 727b1b1f91..03ae5c1079 100644
--- a/Source/Core/Core/ConfigManager.cpp
+++ b/Source/Core/Core/ConfigManager.cpp
@@ -479,11 +479,11 @@ void SConfig::LoadCoreSettings(IniFile& ini)
 
 	core->Get("HLE_BS2",      &m_LocalCoreStartupParameter.bHLE_BS2, false);
 #ifdef _M_X86
-	core->Get("CPUCore",      &m_LocalCoreStartupParameter.iCPUCore, 1);
+	core->Get("CPUCore",      (int*)&m_LocalCoreStartupParameter.iCPUCore, CPU_JIT_X64);
 #elif _M_ARM_32
-	core->Get("CPUCore",      &m_LocalCoreStartupParameter.iCPUCore, 3);
+	core->Get("CPUCore",      (int*)&m_LocalCoreStartupParameter.iCPUCore, CPU_JIT_ARM);
 #else
-	core->Get("CPUCore",      &m_LocalCoreStartupParameter.iCPUCore, 0);
+	core->Get("CPUCore",      (int*)&m_LocalCoreStartupParameter.iCPUCore, CPU_INTERPRETER);
 #endif
 	core->Get("Fastmem",           &m_LocalCoreStartupParameter.bFastmem,      true);
 	core->Get("DSPThread",         &m_LocalCoreStartupParameter.bDSPThread,    false);
diff --git a/Source/Core/Core/Core.cpp b/Source/Core/Core/Core.cpp
index 9e3c1ec808..71291312a6 100644
--- a/Source/Core/Core/Core.cpp
+++ b/Source/Core/Core/Core.cpp
@@ -424,11 +424,16 @@ void EmuThread()
 	CBoot::BootUp();
 
 	// Setup our core, but can't use dynarec if we are compare server
-	if (_CoreParameter.iCPUCore && (!_CoreParameter.bRunCompareServer ||
-					_CoreParameter.bRunCompareClient))
+	if (_CoreParameter.iCPUCore != CPU_INTERPRETER &&
+		(!_CoreParameter.bRunCompareServer ||
+		 _CoreParameter.bRunCompareClient))
+	{
 		PowerPC::SetMode(PowerPC::MODE_JIT);
+	}
 	else
+	{
 		PowerPC::SetMode(PowerPC::MODE_INTERPRETER);
+	}
 
 	// Update the window again because all stuff is initialized
 	Host_UpdateDisasmDialog();
diff --git a/Source/Core/Core/CoreParameter.cpp b/Source/Core/Core/CoreParameter.cpp
index 5a213b5e92..10839f5e26 100644
--- a/Source/Core/Core/CoreParameter.cpp
+++ b/Source/Core/Core/CoreParameter.cpp
@@ -65,7 +65,7 @@ void SCoreStartupParameter::LoadDefaults()
 	iGDBPort = -1;
 	#endif
 
-	iCPUCore = 1;
+	iCPUCore = CPU_JIT_X64;
 	bCPUThread = false;
 	bSkipIdle = false;
 	bRunCompareServer = false;
diff --git a/Source/Core/Core/CoreParameter.h b/Source/Core/Core/CoreParameter.h
index 46ec3976fe..adca9de5bc 100644
--- a/Source/Core/Core/CoreParameter.h
+++ b/Source/Core/Core/CoreParameter.h
@@ -83,6 +83,15 @@ enum Hotkey
 	NUM_HOTKEYS,
 };
 
+enum CPUBackend : u8
+{
+	CPU_INTERPRETER = 0,
+	CPU_JIT_X64     = 1,
+	CPU_JIT_IL_X64  = 2,
+	CPU_JIT_ARM     = 3,
+	CPU_JIT_IL_ARM  = 4,
+};
+
 struct SCoreStartupParameter
 {
 	void* hInstance;  // HINSTANCE but we don't want to include <windows.h>
@@ -95,11 +104,7 @@ struct SCoreStartupParameter
 	bool bAutomaticStart;
 	bool bBootToPause;
 
-	// 0 = Interpreter
-	// 1 = Jit
-	// 2 = JitIL
-	// 3 = JIT ARM
-	int iCPUCore;
+	CPUBackend iCPUCore;
 
 	// JIT (shared between JIT and JITIL)
 	bool bJITNoBlockCache, bJITBlockLinking;
diff --git a/Source/Core/Core/Movie.cpp b/Source/Core/Core/Movie.cpp
index 98d8c41e9f..9eb6258d44 100644
--- a/Source/Core/Core/Movie.cpp
+++ b/Source/Core/Core/Movie.cpp
@@ -61,7 +61,7 @@ u64 g_recordingStartTime; // seconds since 1970 that recording started
 bool bSaveConfig = false, bSkipIdle = false, bDualCore = false, bProgressive = false, bDSPHLE = false, bFastDiscSpeed = false;
 bool g_bClearSave = false, bSyncGPU = false, bNetPlay = false;
 std::string videoBackend = "unknown";
-int iCPUCore = 1;
+CPUBackend iCPUCore = CPU_JIT_X64;
 bool g_bDiscChange = false;
 std::string g_discChange = "";
 std::string author = "";
@@ -356,7 +356,7 @@ bool IsFastDiscSpeed()
 	return bFastDiscSpeed;
 }
 
-int GetCPUMode()
+CPUBackend GetCPUMode()
 {
 	return iCPUCore;
 }
diff --git a/Source/Core/Core/Movie.h b/Source/Core/Core/Movie.h
index c2177e4afa..62dc9bdfff 100644
--- a/Source/Core/Core/Movie.h
+++ b/Source/Core/Core/Movie.h
@@ -8,7 +8,7 @@
 
 #include "Common/ChunkFile.h"
 #include "Common/Common.h"
-
+#include "Core/CoreParameter.h"
 #include "InputCommon/GCPadStatus.h"
 
 namespace WiimoteEmu
@@ -99,7 +99,7 @@ struct DTMHeader
 	bool bProgressive;
 	bool bDSPHLE;
 	bool bFastDiscSpeed;
-	u8  CPUCore;            // 0 = interpreter, 1 = JIT, 2 = JITIL
+	CPUBackend CPUCore;
 	bool bEFBAccessEnable;
 	bool bEFBCopyEnable;
 	bool bCopyEFBToTexture;
@@ -144,7 +144,7 @@ bool IsProgressive();
 bool IsSkipIdle();
 bool IsDSPHLE();
 bool IsFastDiscSpeed();
-int  GetCPUMode();
+CPUBackend GetCPUMode();
 bool IsStartingFromClearSave();
 bool IsUsingMemcard(int memcard);
 bool IsSyncGPU();
diff --git a/Source/Core/Core/NetPlayClient.cpp b/Source/Core/Core/NetPlayClient.cpp
index f15837116d..83f9adb08a 100644
--- a/Source/Core/Core/NetPlayClient.cpp
+++ b/Source/Core/Core/NetPlayClient.cpp
@@ -266,7 +266,7 @@ unsigned int NetPlayClient::OnData(sf::Packet& packet)
 			std::lock_guard<std::recursive_mutex> lkg(m_crit.game);
 			packet >> m_current_game;
 			packet >> g_NetPlaySettings.m_CPUthread;
-			packet >> g_NetPlaySettings.m_CPUcore;
+			packet >> (u8&)g_NetPlaySettings.m_CPUcore;
 			packet >> g_NetPlaySettings.m_DSPEnableJIT;
 			packet >> g_NetPlaySettings.m_DSPHLE;
 			packet >> g_NetPlaySettings.m_WriteToMemcard;
diff --git a/Source/Core/Core/NetPlayProto.h b/Source/Core/Core/NetPlayProto.h
index 14eb998f68..3a9982b6ec 100644
--- a/Source/Core/Core/NetPlayProto.h
+++ b/Source/Core/Core/NetPlayProto.h
@@ -6,13 +6,13 @@
 
 #include "Common/Common.h"
 #include "Common/CommonTypes.h"
-
+#include "Core/CoreParameter.h"
 #include "Core/HW/EXI_Device.h"
 
 struct NetSettings
 {
 	bool m_CPUthread;
-	int m_CPUcore;
+	CPUBackend m_CPUcore;
 	bool m_DSPHLE;
 	bool m_DSPEnableJIT;
 	bool m_WriteToMemcard;
@@ -28,7 +28,7 @@ struct Rpt : public std::vector<u8>
 
 typedef std::vector<u8> NetWiimote;
 
-#define NETPLAY_VERSION  "Dolphin NetPlay 2014-01-08"
+#define NETPLAY_VERSION  "Dolphin NetPlay 2014-06-13"
 
 const int NETPLAY_INITIAL_GCTIME = 1272737767;
 
diff --git a/Source/Core/Core/NetPlayServer.cpp b/Source/Core/Core/NetPlayServer.cpp
index 7d153a1a00..8658f9714a 100644
--- a/Source/Core/Core/NetPlayServer.cpp
+++ b/Source/Core/Core/NetPlayServer.cpp
@@ -548,7 +548,7 @@ bool NetPlayServer::StartGame(const std::string &path)
 	spac << (MessageId)NP_MSG_START_GAME;
 	spac << m_current_game;
 	spac << m_settings.m_CPUthread;
-	spac << m_settings.m_CPUcore;
+	spac << (u8)m_settings.m_CPUcore;
 	spac << m_settings.m_DSPEnableJIT;
 	spac << m_settings.m_DSPHLE;
 	spac << m_settings.m_WriteToMemcard;
diff --git a/Source/Core/Core/PowerPC/PowerPC.cpp b/Source/Core/Core/PowerPC/PowerPC.cpp
index 22182104aa..6b03f4bd04 100644
--- a/Source/Core/Core/PowerPC/PowerPC.cpp
+++ b/Source/Core/Core/PowerPC/PowerPC.cpp
@@ -135,7 +135,7 @@ void Init(int cpu_core)
 
 	switch (cpu_core)
 	{
-		case 0:
+		case CPU_INTERPRETER:
 		{
 			cpu_core_base = interpreter;
 			break;
diff --git a/Source/Core/DolphinWX/ConfigMain.cpp b/Source/Core/DolphinWX/ConfigMain.cpp
index c74400a73f..47beeb8d0a 100644
--- a/Source/Core/DolphinWX/ConfigMain.cpp
+++ b/Source/Core/DolphinWX/ConfigMain.cpp
@@ -32,6 +32,7 @@
 
 #include "Core/ConfigManager.h"
 #include "Core/Core.h"
+#include "Core/CoreParameter.h"
 #include "Core/Movie.h"
 #include "Core/NetPlayProto.h"
 #include "Core/HW/EXI.h"
@@ -57,17 +58,17 @@
 
 struct CPUCore
 {
-	int CPUid;
+	CPUBackend CPUid;
 	const char *name;
 };
 const CPUCore CPUCores[] = {
-	{0, wxTRANSLATE("Interpreter (VERY slow)")},
+	{CPU_INTERPRETER, wxTRANSLATE("Interpreter (VERY slow)")},
 #ifdef _M_ARM
-	{3, wxTRANSLATE("Arm JIT (experimental)")},
-	{4, wxTRANSLATE("Arm JITIL (experimental)")},
+	{CPU_JIT_ARM, wxTRANSLATE("Arm JIT (experimental)")},
+	{CPU_JIT_IL_ARM, wxTRANSLATE("Arm JITIL (experimental)")},
 #else
-	{1, wxTRANSLATE("JIT Recompiler (recommended)")},
-	{2, wxTRANSLATE("JITIL Recompiler (slower, experimental)")},
+	{CPU_JIT_X64, wxTRANSLATE("JIT Recompiler (recommended)")},
+	{CPU_JIT_IL_X64, wxTRANSLATE("JITIL Recompiler (slower, experimental)")},
 #endif
 };
 
@@ -907,7 +908,7 @@ void CConfigMain::CoreSettingsChanged(wxCommandEvent& event)
 		SConfig::GetInstance().m_LocalCoreStartupParameter.iCPUCore = CPUCores[CPUEngine->GetSelection()].CPUid;
 		if (main_frame->g_pCodeWindow)
 			main_frame->g_pCodeWindow->GetMenuBar()->Check(IDM_INTERPRETER,
-				SConfig::GetInstance().m_LocalCoreStartupParameter.iCPUCore?false:true);
+				SConfig::GetInstance().m_LocalCoreStartupParameter.iCPUCore == CPU_INTERPRETER);
 		break;
 	case ID_NTSCJ:
 		SConfig::GetInstance().m_LocalCoreStartupParameter.bForceNTSCJ = _NTSCJ->IsChecked();
diff --git a/Source/Core/DolphinWX/Debugger/CodeWindow.cpp b/Source/Core/DolphinWX/Debugger/CodeWindow.cpp
index b8185a85cc..234f798aa5 100644
--- a/Source/Core/DolphinWX/Debugger/CodeWindow.cpp
+++ b/Source/Core/DolphinWX/Debugger/CodeWindow.cpp
@@ -369,7 +369,7 @@ void CCodeWindow::CreateMenu(const SCoreStartupParameter& _LocalCoreStartupParam
 		" and stepping to work as explained in the Developer Documentation. But it can be very"
 		" slow, perhaps slower than 1 fps."),
 		wxITEM_CHECK);
-	interpreter->Check(_LocalCoreStartupParameter.iCPUCore == 0);
+	interpreter->Check(_LocalCoreStartupParameter.iCPUCore == CPU_INTERPRETER);
 	pCoreMenu->AppendSeparator();
 
 	pCoreMenu->Append(IDM_JITBLOCKLINKING, _("&JIT Block Linking off"),