diff --git a/BizHawk.Emulation.Cores/Consoles/Nintendo/GBA/LibVBANext.cs b/BizHawk.Emulation.Cores/Consoles/Nintendo/GBA/LibVBANext.cs
index 7850fe0566..291780a441 100644
--- a/BizHawk.Emulation.Cores/Consoles/Nintendo/GBA/LibVBANext.cs
+++ b/BizHawk.Emulation.Cores/Consoles/Nintendo/GBA/LibVBANext.cs
@@ -140,6 +140,19 @@ namespace BizHawk.Emulation.Cores.Nintendo.GBA
 		[DllImport(dllname, CallingConvention = cc)]
 		public static extern IntPtr GetRegisters(IntPtr g);
 
+		[UnmanagedFunctionPointer(cc)]
+		public delegate void AddressCallback(uint addr);
+
+		[DllImport(dllname, CallingConvention = cc)]
+		public static extern void SetPadCallback(IntPtr g, StandardCallback cb);
+		[DllImport(dllname, CallingConvention = cc)]
+		public static extern void SetFetchCallback(IntPtr g, AddressCallback cb);
+		[DllImport(dllname, CallingConvention = cc)]
+		public static extern void SetReadCallback(IntPtr g, AddressCallback cb);
+		[DllImport(dllname, CallingConvention = cc)]
+		public static extern void SetWriteCallback(IntPtr g, AddressCallback cb);
+
+
 		[StructLayout(LayoutKind.Sequential)]
 		public class MemoryAreas
 		{
diff --git a/BizHawk.Emulation.Cores/Consoles/Nintendo/GBA/VBANext.cs b/BizHawk.Emulation.Cores/Consoles/Nintendo/GBA/VBANext.cs
index 947bfea4ae..5b1f5fd6cd 100644
--- a/BizHawk.Emulation.Cores/Consoles/Nintendo/GBA/VBANext.cs
+++ b/BizHawk.Emulation.Cores/Consoles/Nintendo/GBA/VBANext.cs
@@ -76,6 +76,7 @@ namespace BizHawk.Emulation.Cores.Nintendo.GBA
 				savebuff2 = new byte[savebuff.Length + 13];
 				InitMemoryDomains();
 				InitRegisters();
+				InitCallbacks();
 
 				// todo: hook me up as a setting
 				SetupColors();
@@ -94,6 +95,8 @@ namespace BizHawk.Emulation.Cores.Nintendo.GBA
 			if (Controller["Power"])
 				LibVBANext.Reset(Core);
 
+			SyncCallbacks();
+
 			IsLagFrame = LibVBANext.FrameAdvance(Core, GetButtons(), videobuff, soundbuff, out numsamp, videopalette);
 
 			if (IsLagFrame)
@@ -259,6 +262,27 @@ namespace BizHawk.Emulation.Cores.Nintendo.GBA
 
 		#region Debugging
 
+		LibVBANext.StandardCallback padcb;
+		LibVBANext.AddressCallback fetchcb;
+		LibVBANext.AddressCallback readcb;
+		LibVBANext.AddressCallback writecb;
+
+		void InitCallbacks()
+		{
+			padcb = new LibVBANext.StandardCallback(() => CoreComm.InputCallback.Call());
+			fetchcb = new LibVBANext.AddressCallback((addr) => CoreComm.MemoryCallbackSystem.CallExecute(addr));
+			readcb = new LibVBANext.AddressCallback((addr) => CoreComm.MemoryCallbackSystem.CallRead(addr));
+			writecb = new LibVBANext.AddressCallback((addr) => CoreComm.MemoryCallbackSystem.CallWrite(addr));
+		}
+
+		void SyncCallbacks()
+		{
+			LibVBANext.SetPadCallback(Core, CoreComm.InputCallback.Any() ? padcb : null);
+			LibVBANext.SetFetchCallback(Core, CoreComm.MemoryCallbackSystem.HasExecutes ? fetchcb : null);
+			LibVBANext.SetReadCallback(Core, CoreComm.MemoryCallbackSystem.HasReads ? readcb : null);
+			LibVBANext.SetWriteCallback(Core, CoreComm.MemoryCallbackSystem.HasWrites ? writecb : null);
+		}
+
 		LibVBANext.StandardCallback scanlinecb;
 
 		GBAGPUMemoryAreas IGBAGPUViewable.GetMemoryAreas()
diff --git a/output/dll/libvbanext.dll b/output/dll/libvbanext.dll
index 2fabdcb1e6..22be59b15f 100644
Binary files a/output/dll/libvbanext.dll and b/output/dll/libvbanext.dll differ
diff --git a/vbanext/instance.cpp b/vbanext/instance.cpp
index ebd854dbe1..6d6d962c81 100644
--- a/vbanext/instance.cpp
+++ b/vbanext/instance.cpp
@@ -2922,6 +2922,9 @@ int timer3ClockReload  ;
 
 INLINE u32 CPUReadMemory(u32 address)
 {
+	if (readCallback)
+		readCallback(address);
+
 	u32 value;
 	switch(address >> 24)
 	{
@@ -2947,7 +2950,11 @@ INLINE u32 CPUReadMemory(u32 address)
 		case 0x04:
 			/* I/O registers */
 			if (address == 0x4000130)
+			{
+				if (padCallback)
+					padCallback();
 				lagged = false;
+			}
 			if((address < 0x4000400) && ioReadable[address & 0x3fc])
 			{
 				if(ioReadable[(address & 0x3fc) + 2])
@@ -3010,8 +3017,10 @@ unreadable:
 
 INLINE u32 CPUReadHalfWord(u32 address)
 {
-	u32 value;
+	if (readCallback)
+		readCallback(address);
 
+	u32 value;
 	switch(address >> 24)
 	{
 		case 0:
@@ -3033,7 +3042,11 @@ INLINE u32 CPUReadHalfWord(u32 address)
 			break;
 		case 4:
 			if (address == 0x4000130)
+			{
+				if (padCallback)
+					padCallback();
 				lagged = false;
+			}
 
 			if((address < 0x4000400) && ioReadable[address & 0x3fe])
 			{
@@ -3115,6 +3128,9 @@ INLINE u16 CPUReadHalfWordSigned(u32 address)
 
 INLINE u8 CPUReadByte(u32 address)
 {
+	if (readCallback)
+		readCallback(address);
+
 	switch(address >> 24)
 	{
 		case 0:
@@ -3132,7 +3148,11 @@ INLINE u8 CPUReadByte(u32 address)
 			return internalRAM[address & 0x7fff];
 		case 4:
 			if (address == 0x4000130 || address == 0x4000131)
+			{
+				if (padCallback)
+					padCallback();
 				lagged = false;
+			}
 
 			if((address < 0x4000400) && ioReadable[address & 0x3ff])
 				return ioMem[address & 0x3ff];
@@ -3185,6 +3205,9 @@ unreadable:
 
 INLINE void CPUWriteMemory(u32 address, u32 value)
 {
+	if (writeCallback)
+		writeCallback(address);
+
 	switch(address >> 24)
 	{
 		case 0x02:
@@ -3230,6 +3253,9 @@ INLINE void CPUWriteMemory(u32 address, u32 value)
 
 INLINE void CPUWriteHalfWord(u32 address, u16 value)
 {
+	if (writeCallback)
+		writeCallback(address);
+
 	switch(address >> 24)
 	{
 		case 2:
@@ -3276,6 +3302,9 @@ INLINE void CPUWriteHalfWord(u32 address, u16 value)
 
 INLINE void CPUWriteByte(u32 address, u8 b)
 {
+	if (writeCallback)
+		writeCallback(address);
+
 	switch(address >> 24)
 	{
 		case 2:
@@ -5576,6 +5605,8 @@ int armExecute (void)
 		int oldArmNextPC = bus.armNextPC;
 
 		bus.armNextPC = bus.reg[15].I;
+		if (fetchCallback)
+			fetchCallback(bus.armNextPC);
 		bus.reg[15].I += 4;
 		ARM_PREFETCH_NEXT;
 
@@ -6469,7 +6500,9 @@ DEFINE_IMM3_INSN(SUB_RD_RS_O3,1E)
 	if (bus.busPrefetchCount == 0)
 		bus.busPrefetch = bus.busPrefetchEnable;
 	u32 address = (bus.reg[15].I & 0xFFFFFFFC) + ((opcode & 0xFF) << 2);
-	bus.reg[regist].I = CPUReadMemoryQuick(address);
+	// why quick?
+	// bus.reg[regist].I = CPUReadMemoryQuick(address);
+	bus.reg[regist].I = CPUReadMemory(address);
 	bus.busPrefetchCount=0;
 	int dataticks_value = DATATICKS_ACCESS_32BIT(address);
 	DATATICKS_ACCESS_BUS_PREFETCH(address, dataticks_value);
@@ -6664,7 +6697,9 @@ DEFINE_IMM3_INSN(SUB_RD_RS_O3,1E)
 	if (bus.busPrefetchCount == 0)
 		bus.busPrefetch = bus.busPrefetchEnable;
 	u32 address = bus.reg[13].I + ((opcode&255)<<2);
-	bus.reg[regist].I = CPUReadMemoryQuick(address);
+	// why quick?
+	// bus.reg[regist].I = CPUReadMemoryQuick(address);
+	bus.reg[regist].I = CPUReadMemory(address);
 	int dataticks_value = DATATICKS_ACCESS_32BIT(address);
 	DATATICKS_ACCESS_BUS_PREFETCH(address, dataticks_value);
 	clockTicks = 3 + dataticks_value + codeTicksAccess(bus.armNextPC, BITS_16);
@@ -7169,6 +7204,9 @@ int thumbExecute (void)
 		u32 oldArmNextPC = bus.armNextPC;
 
 		bus.armNextPC = bus.reg[15].I;
+		if (fetchCallback)
+			fetchCallback(bus.armNextPC);
+
 		bus.reg[15].I += 2;
 		THUMB_PREFETCH_NEXT;
 
@@ -12941,6 +12979,12 @@ bool lagged;
 void (*scanlineCallback)();
 int scanlineCallbackLine;
 
+void (*fetchCallback)(u32 addr);
+void (*writeCallback)(u32 addr);
+void (*readCallback)(u32 addr);
+
+void (*padCallback)();
+
 void systemDrawScreen (void)
 {
 	// upconvert 555->888 (TODO: BETTER)
@@ -13365,6 +13409,30 @@ template<bool isReader>bool SyncBatteryRam(NewState *ns)
 		return &bus.reg[0].I;
 	}
 
+	void SetPadCallback(void (*cb)())
+	{
+		// before each read of the pad regs
+		padCallback = cb;
+	}
+
+	void SetFetchCallback(void (*cb)(u32 addr))
+	{
+		// before each opcode fetch
+		fetchCallback = cb;
+	}
+
+	void SetReadCallback(void (*cb)(u32 addr))
+	{
+		// before each read, not including opcodes, including pad regs
+		readCallback = cb;
+	}
+
+	void SetWriteCallback(void (*cb)(u32 addr))
+	{
+		// before each write
+		writeCallback = cb;
+	}
+
 }; // class Gigazoid
 
 // zeroing mem operators: these are very important
@@ -13516,4 +13584,10 @@ EXPORT u32 *GetRegisters(Gigazoid *g)
 	return g->GetRegisters();
 }
 
+EXPORT void SetPadCallback(Gigazoid *g, void (*cb)()) { g->SetPadCallback(cb); }
+EXPORT void SetFetchCallback(Gigazoid *g, void (*cb)(u32 addr)) { g->SetFetchCallback(cb); }
+EXPORT void SetReadCallback(Gigazoid *g, void (*cb)(u32 addr)) { g->SetReadCallback(cb); }
+EXPORT void SetWriteCallback(Gigazoid *g, void (*cb)(u32 addr)) { g->SetWriteCallback(cb); }
+
+
 #include "optable.inc"