diff --git a/Source/Core/Core/Src/HW/Memmap.h b/Source/Core/Core/Src/HW/Memmap.h
index 720e39359b..703fd6c399 100644
--- a/Source/Core/Core/Src/HW/Memmap.h
+++ b/Source/Core/Core/Src/HW/Memmap.h
@@ -128,6 +128,10 @@ namespace Memory
 	u32 Read_U32(const u32 _Address);
 	u64 Read_U64(const u32 _Address);
 
+	// used by JIT. Return zero-extended 32bit values
+	u32  Read_U8_ZX(const u32 _Address);
+	u32 Read_U16_ZX(const u32 _Address);
+
 	void Write_U8(const u8 _Data, const u32 _Address);
 	void Write_U16(const u16 _Data, const u32 _Address);
 	void Write_U32(const u32 _Data, const u32 _Address);
diff --git a/Source/Core/Core/Src/HW/MemmapFunctions.cpp b/Source/Core/Core/Src/HW/MemmapFunctions.cpp
index ccbcc3bdcf..b21a81fc94 100644
--- a/Source/Core/Core/Src/HW/MemmapFunctions.cpp
+++ b/Source/Core/Core/Src/HW/MemmapFunctions.cpp
@@ -368,6 +368,15 @@ u64 Read_U64(const u32 _Address)
 	return _var;
 }
 
+u32 Read_U8_ZX(const u32 _Address)
+{
+	return (u32)Read_U8(_Address);
+}
+
+u32 Read_U16_ZX(const u32 _Address)
+{
+	return (u32)Read_U16(_Address);
+}
 
 void Write_U8(const u8 _Data, const u32 _Address)	
 {
diff --git a/Source/Core/Core/Src/PowerPC/Jit64IL/IR.h b/Source/Core/Core/Src/PowerPC/Jit64IL/IR.h
index ff1468883e..f2f77263af 100644
--- a/Source/Core/Core/Src/PowerPC/Jit64IL/IR.h
+++ b/Source/Core/Core/Src/PowerPC/Jit64IL/IR.h
@@ -167,7 +167,10 @@ enum Opcode {
 	// reference directly; this is a size optimization
 	Tramp,
 	// "Opcode"s representing the start and end
-	BlockStart, BlockEnd
+	BlockStart, BlockEnd,
+
+	// used for debugging
+	Int3
 };
 
 typedef unsigned Inst;
@@ -505,6 +508,10 @@ public:
 	InstLoc EmitStoreSRR(InstLoc op1, unsigned srr) {
 		return FoldUOp(StoreSRR, op1, srr);
 	}
+	InstLoc EmitINT3()
+	{
+		return FoldZeroOp(Int3, 0);
+	}
 
 	void StartBackPass() { curReadPtr = &InstList[InstList.size()]; }
 	void StartForwardPass() { curReadPtr = &InstList[0]; }
diff --git a/Source/Core/Core/Src/PowerPC/Jit64IL/IR_X86.cpp b/Source/Core/Core/Src/PowerPC/Jit64IL/IR_X86.cpp
index d045da4cd9..0cefd13e34 100644
--- a/Source/Core/Core/Src/PowerPC/Jit64IL/IR_X86.cpp
+++ b/Source/Core/Core/Src/PowerPC/Jit64IL/IR_X86.cpp
@@ -470,8 +470,8 @@ static void regEmitMemLoad(RegInfo& RI, InstLoc I, unsigned Size) {
 	switch (Size)
 	{
 	case 32: RI.Jit->ABI_CallFunctionR(thunks.ProtectFunction((void *)&Memory::Read_U32, 1), ECX); break;
-	case 16: RI.Jit->ABI_CallFunctionR(thunks.ProtectFunction((void *)&Memory::Read_U16, 1), ECX); break;
-	case 8:  RI.Jit->ABI_CallFunctionR(thunks.ProtectFunction((void *)&Memory::Read_U8, 1), ECX);  break;
+	case 16: RI.Jit->ABI_CallFunctionR(thunks.ProtectFunction((void *)&Memory::Read_U16_ZX, 1), ECX); break;
+	case 8:  RI.Jit->ABI_CallFunctionR(thunks.ProtectFunction((void *)&Memory::Read_U8_ZX, 1), ECX);  break;
 	}
 	if (reg != EAX) {
 		RI.Jit->MOV(32, R(reg), R(EAX));
@@ -665,7 +665,8 @@ static void DoWriteCode(IRBuilder* ibuild, Jit64* Jit, bool UseProfile, bool Mak
 		case SystemCall:
 		case RFIExit:
 		case InterpreterBranch:		
-		case ShortIdleLoop:		
+		case ShortIdleLoop:
+		case Int3:
 		case Tramp:
 			// No liveness effects
 			break;
@@ -1590,6 +1591,10 @@ static void DoWriteCode(IRBuilder* ibuild, Jit64* Jit, bool UseProfile, bool Mak
 			Jit->WriteRfiExitDestInEAX();
 			break;
 		}
+		case Int3: {
+			Jit->INT3();
+			break;
+		}
 		case Tramp: break;
 		case Nop: break;
 		default:
diff --git a/Source/Core/Core/Src/PowerPC/JitCommon/Jit_Util.cpp b/Source/Core/Core/Src/PowerPC/JitCommon/Jit_Util.cpp
index 3eadc2a34e..f05b404448 100644
--- a/Source/Core/Core/Src/PowerPC/JitCommon/Jit_Util.cpp
+++ b/Source/Core/Core/Src/PowerPC/JitCommon/Jit_Util.cpp
@@ -85,8 +85,8 @@ void Jit64::SafeLoadRegToEAX(X64Reg reg, int accessSize, s32 offset, bool signEx
 	switch (accessSize)
 	{
 	case 32: ABI_CallFunctionR(thunks.ProtectFunction((void *)&Memory::Read_U32, 1), reg); break;
-	case 16: ABI_CallFunctionR(thunks.ProtectFunction((void *)&Memory::Read_U16, 1), reg); break;
-	case 8:  ABI_CallFunctionR(thunks.ProtectFunction((void *)&Memory::Read_U8, 1), reg);  break;
+	case 16: ABI_CallFunctionR(thunks.ProtectFunction((void *)&Memory::Read_U16_ZX, 1), reg); break;
+	case 8:  ABI_CallFunctionR(thunks.ProtectFunction((void *)&Memory::Read_U8_ZX, 1), reg);  break;
 	}
 	if (signExtend && accessSize < 32) {
 		// Need to sign extend values coming from the Read_U* functions.