diff --git a/include/user/spMcRingBuffer.h b/include/user/spMcRingBuffer.h
index f4a350a..b368af6 100644
--- a/include/user/spMcRingBuffer.h
+++ b/include/user/spMcRingBuffer.h
@@ -10,6 +10,9 @@
 #include <user/stimulusFrame.h>
 #include <user/frameAssemblyDesc.h>
 #include <user/sequenceLock.h>
+#include <user/senseApiDesc.h>
+#define CL_TARGET_OPENCL_VERSION 120
+#include <CL/cl.h>
 
 namespace smo {
 namespace stim_buff {
@@ -31,7 +34,9 @@ public:
 	 * each initialized with a SlotDesc from the FrameAssemblyDesc.
 	 */
 	explicit SpMcRingBuffer(
-		const std::shared_ptr<FrameAssemblyDesc> &frameAssemblyDesc_)
+		const std::shared_ptr<FrameAssemblyDesc> &frameAssemblyDesc_,
+		const SmoCallbacks& callbacks,
+		cl_mem_flags flags)
 	:
 	nBuffers(frameAssemblyDesc_ ? frameAssemblyDesc_->slots.size() : 0),
 	frameAssemblyDesc(frameAssemblyDesc_),
@@ -54,7 +59,8 @@ public:
 		for (size_t i = 0; i < nBuffers; ++i)
 		{
 			slots[i].~StimulusFrame();  // Destroy default-constructed object
-			new (&slots[i]) StimulusFrame(frameAssemblyDesc->slots[i]);
+			new (&slots[i]) StimulusFrame(
+				frameAssemblyDesc->slots[i], callbacks, flags);
 		}
 	}
 
diff --git a/include/user/stimulusBuffer.h b/include/user/stimulusBuffer.h
index 7569954..15750c1 100644
--- a/include/user/stimulusBuffer.h
+++ b/include/user/stimulusBuffer.h
@@ -7,8 +7,11 @@
 #include <user/spMcRingBuffer.h>
 #include <user/stagingBuffer.h>
 #include <user/frameAssemblyDesc.h>
+#include <user/senseApiDesc.h>
 #include "stimulusFrame.h"
 #include "deviceAttachmentSpec.h"
+#define CL_TARGET_OPENCL_VERSION 120
+#include <CL/cl.h>
 
 namespace smo {
 namespace stim_buff {
@@ -31,7 +34,9 @@ public:
 			&deviceAttachmentSpec,
 		int histbuffMs,
 		const StagingBuffer::IOEngineConstraints& inputEngineConstraints,
-		const StagingBuffer::IOEngineConstraints& outputEngineConstraints)
+		const StagingBuffer::IOEngineConstraints& outputEngineConstraints,
+		const SmoCallbacks& callbacks,
+		cl_mem_flags flags)
 	: parent(parent),
 	deviceAttachmentSpec(deviceAttachmentSpec),
 	histbuffMs(histbuffMs),
@@ -39,7 +44,9 @@ public:
 		inputEngineConstraints,
 		outputEngineConstraints,
 		static_cast<size_t>(histbuffMs / CONFIG_STIMBUFF_FRAME_PERIOD_MS)),
-	ringBuffer(static_cast<std::shared_ptr<FrameAssemblyDesc>>(stagingBuffer))
+	ringBuffer(
+		static_cast<std::shared_ptr<FrameAssemblyDesc>>(stagingBuffer),
+		callbacks, flags)
 	{}
 
 	virtual ~StimulusBuffer() = default;
diff --git a/include/user/stimulusFrame.h b/include/user/stimulusFrame.h
index 32caea7..b18cdb7 100644
--- a/include/user/stimulusFrame.h
+++ b/include/user/stimulusFrame.h
@@ -2,8 +2,13 @@
 #define _ATTACHMENT_SUPPORT_STIMULUS_FRAME_H
 
 #include <cstdint>
+#include <memory>
 #include <user/frameAssemblyDesc.h>
 #include <user/sequenceLock.h>
+#include <user/compute.h>
+#include <user/senseApiDesc.h>
+#define CL_TARGET_OPENCL_VERSION 120
+#include <CL/cl.h>
 
 namespace smo {
 namespace stim_buff {
@@ -69,9 +74,30 @@ public:
 	 */
 	StimulusFrame() = default;
 
-	StimulusFrame(const FrameAssemblyDesc::SlotDesc& slotDesc_)
+	StimulusFrame(
+		const FrameAssemblyDesc::SlotDesc& slotDesc_,
+		const SmoCallbacks& callbacks,
+		cl_mem_flags flags)
 	: slotDesc(slotDesc_)
-	{}
+	{
+		if (!callbacks.ComputeManager_createUseHostPtrBuffer)
+		{
+			throw std::runtime_error(std::string(__func__)
+				+ ": StimulusFrame: ComputeManager_createUseHostPtrBuffer "
+				"callback is null");
+		}
+
+		clBuffer = callbacks.ComputeManager_createUseHostPtrBuffer(
+			slotDesc.vaddr, slotDesc.nBytes, flags);
+
+		if (!clBuffer)
+		{
+			throw std::runtime_error(std::string(__func__)
+				+ ": StimulusFrame: failed to create clBuffer");
+		}
+
+		std::cout << __func__ << ": StimulusFrame: created clBuffer with size " << slotDesc.nBytes << " bytes @ " << (const void*)slotDesc.vaddr << std::endl;
+	}
 
 	~StimulusFrame() = default;
 
@@ -85,6 +111,7 @@ public:
 	SequenceLock lock;
 	SimultaneityStamp simultaneityStamp;
 	FrameAssemblyDesc::SlotDesc slotDesc;
+	std::shared_ptr<smo::compute::ClBuffer> clBuffer;
 };
 
 } // namespace stim_buff
diff --git a/stimBuffApis/livoxGen1/meshStimulusBuffer.h b/stimBuffApis/livoxGen1/meshStimulusBuffer.h
index f5d4a49..b208bd8 100644
--- a/stimBuffApis/livoxGen1/meshStimulusBuffer.h
+++ b/stimBuffApis/livoxGen1/meshStimulusBuffer.h
@@ -23,10 +23,13 @@ public:
 		const std::shared_ptr<device::DeviceAttachmentSpec>& deviceAttachmentSpec,
 		int histbuffMs,
 		const StagingBuffer::IOEngineConstraints& inputEngineConstraints,
-		const StagingBuffer::IOEngineConstraints& outputEngineConstraints)
+		const StagingBuffer::IOEngineConstraints& outputEngineConstraints,
+		const SmoCallbacks& callbacks,
+		cl_mem_flags flags)
 	:	StimulusBuffer(
 			parent, deviceAttachmentSpec, histbuffMs,
-			inputEngineConstraints, outputEngineConstraints)
+			inputEngineConstraints, outputEngineConstraints,
+			callbacks, flags)
 	{}
 
 	~MeshStimulusBuffer() = default;
diff --git a/stimBuffApis/livoxGen1/pcloudAmbienceStimulusBuffer.h b/stimBuffApis/livoxGen1/pcloudAmbienceStimulusBuffer.h
index c10d20d..c5c41c2 100644
--- a/stimBuffApis/livoxGen1/pcloudAmbienceStimulusBuffer.h
+++ b/stimBuffApis/livoxGen1/pcloudAmbienceStimulusBuffer.h
@@ -23,10 +23,13 @@ public:
 		const std::shared_ptr<device::DeviceAttachmentSpec>& deviceAttachmentSpec,
 		int histbuffMs,
 		const StagingBuffer::IOEngineConstraints& inputEngineConstraints,
-		const StagingBuffer::IOEngineConstraints& outputEngineConstraints)
+		const StagingBuffer::IOEngineConstraints& outputEngineConstraints,
+		const SmoCallbacks& callbacks,
+		cl_mem_flags flags)
 	:	StimulusBuffer(
 			parent, deviceAttachmentSpec, histbuffMs,
-			inputEngineConstraints, outputEngineConstraints)
+			inputEngineConstraints, outputEngineConstraints,
+			callbacks, flags)
 	{}
 
 	~PcloudAmbienceStimulusBuffer() = default;
diff --git a/stimBuffApis/livoxGen1/pcloudIntensityStimulusBuffer.h b/stimBuffApis/livoxGen1/pcloudIntensityStimulusBuffer.h
index 8aa10ef..e978f30 100644
--- a/stimBuffApis/livoxGen1/pcloudIntensityStimulusBuffer.h
+++ b/stimBuffApis/livoxGen1/pcloudIntensityStimulusBuffer.h
@@ -24,10 +24,13 @@ public:
 			&deviceAttachmentSpec,
 		int histbuffMs,
 		const StagingBuffer::IOEngineConstraints& inputEngineConstraints,
-		const StagingBuffer::IOEngineConstraints& outputEngineConstraints)
+		const StagingBuffer::IOEngineConstraints& outputEngineConstraints,
+		const SmoCallbacks& callbacks,
+		cl_mem_flags flags)
 	:	StimulusBuffer(
 			parent, deviceAttachmentSpec, histbuffMs,
-			inputEngineConstraints, outputEngineConstraints)
+			inputEngineConstraints, outputEngineConstraints,
+			callbacks, flags)
 	{}
 
 	~PcloudIntensityStimulusBuffer() = default;
diff --git a/stimBuffApis/livoxGen1/pcloudStimulusProducer.cpp b/stimBuffApis/livoxGen1/pcloudStimulusProducer.cpp
index bb202b5..5517e49 100644
--- a/stimBuffApis/livoxGen1/pcloudStimulusProducer.cpp
+++ b/stimBuffApis/livoxGen1/pcloudStimulusProducer.cpp
@@ -83,10 +83,12 @@ collationBuffer(
 	StagingBuffer::IOEngineConstraints::openClInputConstraints,
 	nDgramsPerStagingBufferFrame),
 tempStimulusFrameMem(0),
-tempStimulusFrame(FrameAssemblyDesc::SlotDesc{
-	0,
-	reinterpret_cast<uint8_t*>(&tempStimulusFrameMem),
-	sizeof(tempStimulusFrameMem)})
+tempStimulusFrame(
+	FrameAssemblyDesc::SlotDesc{
+		0,
+		reinterpret_cast<uint8_t*>(&tempStimulusFrameMem),
+		sizeof(tempStimulusFrameMem)},
+	*smoHooksPtr, 0)
 {
 	if (smoHooksPtr->OptionParser_getOptions().verbose)
 	{
@@ -236,7 +238,8 @@ PcloudStimulusProducer::getOrCreateAttachedStimulusBuffer(
 std::cout << __func__ << ": $$$$$$$ Creating MeshStimulusBuffer" << std::endl;
 		auto meshBuffer = std::make_shared<MeshStimulusBuffer>(
 			*this, deviceAttachmentSpec, histbuffMs,
-			openClMeshInputConstraints, openClMeshInputConstraints);
+			openClMeshInputConstraints, openClMeshInputConstraints,
+			*smoHooksPtr, CL_MEM_READ_WRITE);
 
 std::cout << __func__ << ": $$$$$$$ Created MeshStimulusBuffer" << std::endl;
 		meshStimulusBuffer = meshBuffer;
@@ -256,7 +259,8 @@ std::cout << __func__ << ": $$$$$$$ Created MeshStimulusBuffer" << std::endl;
 std::cout << __func__ << ": $$$$$$$ Creating PcloudIntensityStimulusBuffer" << std::endl;
 		auto intensityBuffer = std::make_shared<PcloudIntensityStimulusBuffer>(
 			*this, deviceAttachmentSpec, histbuffMs,
-			openClIntensityInputConstraints, openClIntensityInputConstraints);
+			openClIntensityInputConstraints, openClIntensityInputConstraints,
+			*smoHooksPtr, CL_MEM_READ_WRITE);
 
 std::cout << __func__ << ": $$$$$$$ Created PcloudIntensityStimulusBuffer" << std::endl;
 		intensityStimulusBuffer = intensityBuffer;
@@ -275,7 +279,8 @@ std::cout << __func__ << ": $$$$$$$ Created PcloudIntensityStimulusBuffer" << st
 
 		auto ambienceBuffer = std::make_shared<PcloudAmbienceStimulusBuffer>(
 			*this, deviceAttachmentSpec, histbuffMs,
-			openClAmbienceInputConstraints, openClAmbienceInputConstraints);
+			openClAmbienceInputConstraints, openClAmbienceInputConstraints,
+			*smoHooksPtr, CL_MEM_READ_WRITE);
 
 std::cout << __func__ << ": $$$$$$$ Created PcloudAmbienceStimulusBuffer" << std::endl;
 		ambienceStimulusBuffer = ambienceBuffer;