Index: firmware/App/Services/SystemCommMessages.c
===================================================================
diff -u -r8ea2ea3096334f18a1bd38018bc4359e16374d83 -r35c07199fda6ba28c7ee417105a16ea3d14a2ad6
--- firmware/App/Services/SystemCommMessages.c	(.../SystemCommMessages.c)	(revision 8ea2ea3096334f18a1bd38018bc4359e16374d83)
+++ firmware/App/Services/SystemCommMessages.c	(.../SystemCommMessages.c)	(revision 35c07199fda6ba28c7ee417105a16ea3d14a2ad6)
@@ -20,9 +20,9 @@
 #include "reg_system.h"
 
 #include "Accel.h"
+#include "Compatible.h"
 #include "ConcentratePumps.h"
 #include "ConductivitySensors.h"
-#include "Fans.h"
 #include "FPGA.h"
 #include "Heaters.h"
 #include "ModeFlush.h"
@@ -363,7 +363,6 @@
     return result;
 }
 
-
 // ***********************************************************************
 // **************** Message Handling Helper Functions ********************
 // ***********************************************************************
@@ -453,6 +452,7 @@
     payload.minor = (U08)DG_VERSION_MINOR;
     payload.micro = (U08)DG_VERSION_MICRO;
     payload.build = (U16)DG_VERSION_BUILD;
+    payload.compatibilityRev = (U32)SW_COMPATIBILITY_REV;
     getFPGAVersions( &payload.fpgaId, &payload.fpgaMajor, &payload.fpgaMinor, &payload.fpgaLab );
 
     // create a message record
@@ -3047,37 +3047,6 @@
 }
 
 /*********************************************************************//**
- * @brief
- * The handleFansRPMOverride function handles a request to override a fans RPM value.
- * @details Inputs: none
- * @details Outputs: message handled
- * @param message a pointer to the message to handle
- * @return none
- *************************************************************************/
-void handleFansRPMOverride( MESSAGE_T *message )
-{
-    TEST_OVERRIDE_ARRAY_PAYLOAD_T payload;
-    BOOL result = FALSE;
-
-    // verify payload length
-    if ( sizeof(TEST_OVERRIDE_ARRAY_PAYLOAD_T) == message->hdr.payloadLen )
-    {
-        memcpy( &payload, message->payload, sizeof(TEST_OVERRIDE_ARRAY_PAYLOAD_T) );
-        if ( FALSE == payload.reset )
-        {
-            result = testSetFanRPMOverride( payload.index, payload.state.f32 );
-        }
-        else
-        {
-            result = testResetFanRPMOverride( payload.index );
-        }
-    }
-
-    // respond to request
-    sendTestAckResponseMsg( (MSG_ID_T)message->hdr.msgID, result );
-}
-
-/*********************************************************************//**
 * @brief
 * The handleStopDGRTCClock function handles a request to stop the RTC clock.
 * @details Inputs: none
@@ -3251,10 +3220,41 @@
 
 /*********************************************************************//**
  * @brief
- * The handleTestFansRPMAlarmStartTimeOffsetRequest function handles a
- * request to set the fans RPM alarm start time offset.
+ * The handleFansRPMOverride function handles a request to override a fans RPM value.
  * @details Inputs: none
  * @details Outputs: message handled
+ * @param message a pointer to the message to handle
+ * @return none
+ *************************************************************************/
+void handleFansRPMOverride( MESSAGE_T *message )
+{
+    TEST_OVERRIDE_ARRAY_PAYLOAD_T payload;
+    BOOL result = FALSE;
+
+    // verify payload length
+    if ( sizeof(TEST_OVERRIDE_ARRAY_PAYLOAD_T) == message->hdr.payloadLen )
+    {
+        memcpy( &payload, message->payload, sizeof(TEST_OVERRIDE_ARRAY_PAYLOAD_T) );
+        if ( FALSE == payload.reset )
+        {
+            result = testSetFanRPMOverride( payload.index, payload.state.f32 );
+        }
+        else
+        {
+            result = testResetFanRPMOverride( payload.index );
+        }
+    }
+
+    // respond to request
+    sendTestAckResponseMsg( (MSG_ID_T)message->hdr.msgID, result );
+}
+
+/*********************************************************************//**
+ * @brief
+ * The handleTestFansRPMAlarmStartTimeOverrideRequest function handles a
+ * request to override the fan RPM alarm start time.
+ * @details Inputs: none
+ * @details Outputs: message handled
  * @param message : a pointer to the message to handle
  * @return none
  *************************************************************************/
@@ -3372,4 +3372,36 @@
     sendTestAckResponseMsg( (MSG_ID_T)message->hdr.msgID, status );
 }
 
+/*********************************************************************//**
+ * @brief
+ * The handleTestHDCommunicationStatusOverrideRequest function handles a request 
+ * request to override the HD Communication Status.
+ * @details Inputs: none
+ * @details Outputs: message handled
+ * @param message a pointer to the message to handle
+ * @return none
+ *************************************************************************/
+void handleTestHDCommunicationStatusOverrideRequest(MESSAGE_T *message)
+{
+    TEST_OVERRIDE_PAYLOAD_T payload;
+    BOOL result = FALSE;
+
+    // verify payload length
+    if ( sizeof( BOOL ) == message->hdr.payloadLen )
+    {
+
+        memcpy( &payload.reset, message->payload, sizeof( BOOL ) );
+        if ( FALSE == payload.reset )
+        {
+            result = testSetHDCommunicationStatus();
+        }
+        else
+        {
+            result = testResetHDCommuncationStatus();
+        }
+    }
+
+    // respond to request
+    sendTestAckResponseMsg( (MSG_ID_T)message->hdr.msgID, result );
+}
 /**@}*/