Index: sources/update/UpdateProtocol.h
===================================================================
diff -u -r20b370a54d2737831b307a0de82aec9e06e2b772 -r110fa8df5fc77830fa05d04af55b349dd8f9c6d9
--- sources/update/UpdateProtocol.h	(.../UpdateProtocol.h)	(revision 20b370a54d2737831b307a0de82aec9e06e2b772)
+++ sources/update/UpdateProtocol.h	(.../UpdateProtocol.h)	(revision 110fa8df5fc77830fa05d04af55b349dd8f9c6d9)
@@ -55,13 +55,17 @@
  * on each 8 byte transfer... The only way to 100% be sure the
  * streams don't get confused by the "mailbox" system used by
  * TI style CAN bus HW is to make them distinct command IDs.
+ *
+ * The app msgs are < 0x8000. We start there.
  */
 typedef enum SwUpdateCanMsgIds {
-    CommandId = 1,          ///< SwUpdateCommand ID.
-    DataBufferId_FW = 2,    ///< SwUpdateDataBuffer ID for FW.
-    DataBufferId_FPGA = 3,  ///< SwUpdateDataBuffer ID for FPGA.
-    ResponseId = 4,         ///< SwUpdateResponse ID.
-    VerifyId = 5,           ///< SwUpdateResponse ID.
+    CommandId = 0x8001,          ///< SwUpdateCommand ID.
+    DataBufferId_HD_FW = 0x8002,    ///< SwUpdateDataBuffer ID for FW.
+    DataBufferId_HD_FPGA = 0x8003,  ///< SwUpdateDataBuffer ID for FPGA.
+    DataBufferId_DG_FW = 0x8004,    ///< SwUpdateDataBuffer ID for FW.
+    DataBufferId_DG_FPGA = 0x8005,  ///< SwUpdateDataBuffer ID for FPGA.
+    ResponseId = 0x8006,         ///< SwUpdateResponse ID.
+    VerifyId = 0x8007,           ///< SwUpdateResponse ID.
     NumMsgIds               ///< Always last.    
 } SwUpdateCanMsgIds;