diff --git a/doc/CHANGELOG.md b/doc/CHANGELOG.md
index 37c6c5fc..868dbed6 100644
--- a/doc/CHANGELOG.md
+++ b/doc/CHANGELOG.md
@@ -47,13 +47,17 @@ The full set of tests is only run for tagged releases.
 - add pdp11_dmpcnt: performance counters
 
 ### Changes
-- use for C++ compiles also `-Wpedantic`
 - sys_w11_n4: reduce cache from 64 to 32 kB to keep timing closure
+- changes for DM_STAT_* signals (debug and monitoring)
+  - DM_STAT_SE: add cpbusy and idec
 - RtclRw11Unit: fix for clang: M_virt() now public
 - backend code review:
+  - use for C++ compiles also `-Wpedantic`
   - fixes for uninitialized variables (coverity, all uncritical)
-  - now -Wunused-parameter clean (comment unused params)
-  - now -Wunused-variable clean (comment so far unused code)
+  - now -Wunused-parameter clean (comment out unused params)
+  - now -Wunused-variable clean (comment out so far unused code)
+  - some selected clang -Weverything aspects
+    - now -Wdocumentation clean (some wrong doxygen trailing comments)
 
 ### Bug Fixes
 - RtclArgs.hpp: BUGFIX: get *_min limits correct (gcc -Wpedantic)
diff --git a/tools/src/librlink/RlinkPacketBufRcv.hpp b/tools/src/librlink/RlinkPacketBufRcv.hpp
index a2fa1c7c..90bc9437 100644
--- a/tools/src/librlink/RlinkPacketBufRcv.hpp
+++ b/tools/src/librlink/RlinkPacketBufRcv.hpp
@@ -1,4 +1,4 @@
-// $Id: RlinkPacketBufRcv.hpp 983 2018-01-02 20:35:59Z mueller $
+// $Id: RlinkPacketBufRcv.hpp 1052 2018-09-30 08:10:52Z mueller $
 //
 // Copyright 2014-2017 by Walter F.J. Mueller <W.F.J.Mueller@gsi.de>
 //
@@ -47,10 +47,10 @@ namespace Retro {
       void          FlushRaw();
 
       enum pkt_state {
-        kPktPend=0,                         //<! pending, still being filled
-        kPktResp,                           //<! response packet (SOP+EOP)
-        kPktAttn,                           //<! attn notify packet (ATTN+EOP)
-        kPktError                           //<! errorous packet
+        kPktPend=0,                         //!< pending, still being filled
+        kPktResp,                           //!< response packet (SOP+EOP)
+        kPktAttn,                           //!< attn notify packet (ATTN+EOP)
+        kPktError                           //!< errorous packet
       };
       pkt_state     PacketState();
 
diff --git a/tools/src/librlink/RlinkPort.hpp b/tools/src/librlink/RlinkPort.hpp
index 284fb551..66ed9f8b 100644
--- a/tools/src/librlink/RlinkPort.hpp
+++ b/tools/src/librlink/RlinkPort.hpp
@@ -1,4 +1,4 @@
-// $Id: RlinkPort.hpp 983 2018-01-02 20:35:59Z mueller $
+// $Id: RlinkPort.hpp 1052 2018-09-30 08:10:52Z mueller $
 //
 // Copyright 2011-2017 by Walter F.J. Mueller <W.F.J.Mueller@gsi.de>
 //
@@ -85,9 +85,9 @@ namespace Retro {
                          int detail=0) const;
 
     // some constants (also defined in cpp)
-      static const int  kEof  =  0;         //<! return code: end-of-file 
-      static const int  kTout = -1;         //<! return code: time out
-      static const int  kErr  = -2;         //<! return code: IO error
+      static const int  kEof  =  0;         //!< return code: end-of-file 
+      static const int  kTout = -1;         //!< return code: time out
+      static const int  kErr  = -2;         //!< return code: IO error
 
     // statistics counter indices
       enum stats {
diff --git a/tools/src/librlink/RlinkServer.hpp b/tools/src/librlink/RlinkServer.hpp
index c1ca81db..98d05c84 100644
--- a/tools/src/librlink/RlinkServer.hpp
+++ b/tools/src/librlink/RlinkServer.hpp
@@ -1,4 +1,4 @@
-// $Id: RlinkServer.hpp 983 2018-01-02 20:35:59Z mueller $
+// $Id: RlinkServer.hpp 1052 2018-09-30 08:10:52Z mueller $
 //
 // Copyright 2013-2017 by Walter F.J. Mueller <W.F.J.Mueller@gsi.de>
 //
@@ -54,10 +54,10 @@ namespace Retro {
     public:
 
       struct AttnArgs {
-        uint16_t    fAttnPatt;              //<! in: current attention pattern
-        uint16_t    fAttnMask;              //<! in: handler attention mask
-        uint16_t    fAttnHarvest;           //<! out: harvested attentions
-        bool        fHarvestDone;           //<! out: set true when harvested
+        uint16_t    fAttnPatt;              //!< in: current attention pattern
+        uint16_t    fAttnMask;              //!< in: handler attention mask
+        uint16_t    fAttnHarvest;           //!< out: harvested attentions
+        bool        fHarvestDone;           //!< out: set true when harvested
                     AttnArgs();
                     AttnArgs(uint16_t apatt, uint16_t amask);
       };
@@ -117,9 +117,9 @@ namespace Retro {
         kStatNEloopPoll,                    //!< event loop turns (poll)
         kStatNWakeupEvt,                    //!< Wakeup events
         kStatNRlinkEvt,                     //!< Rlink data events
-        kStatNAttnHdl,                      //<! Attn handler calls
-        kStatNAttnNoti,                     //<! Attn notifies processed
-        kStatNAttnHarv,                     //<! Attn handler restarts
+        kStatNAttnHdl,                      //!< Attn handler calls
+        kStatNAttnNoti,                     //!< Attn notifies processed
+        kStatNAttnHarv,                     //!< Attn handler restarts
         kStatNAttn00,                       //!< Attn bit  0 set
         kStatNAttn01,                       //!< Attn bit  1 set
         kStatNAttn02,                       //!< Attn bit  2 set
diff --git a/tools/src/librlinktpp/RtclRlinkServer.hpp b/tools/src/librlinktpp/RtclRlinkServer.hpp
index c835079c..6d980db9 100644
--- a/tools/src/librlinktpp/RtclRlinkServer.hpp
+++ b/tools/src/librlinktpp/RtclRlinkServer.hpp
@@ -1,4 +1,4 @@
-// $Id: RtclRlinkServer.hpp 983 2018-01-02 20:35:59Z mueller $
+// $Id: RtclRlinkServer.hpp 1052 2018-09-30 08:10:52Z mueller $
 //
 // Copyright 2013-2015 by Walter F.J. Mueller <W.F.J.Mueller@gsi.de>
 //
@@ -65,7 +65,7 @@ namespace Retro {
       typedef alist_t::iterator           alist_it_t;
 
       boost::shared_ptr<RlinkConnect> fspConn;
-      alist_t       fAttnHdl; //<! list of attn handlers
+      alist_t       fAttnHdl; //!< list of attn handlers
       RtclGetList   fGets;
       RtclSetList   fSets;
   };
diff --git a/tools/src/librtcltools/RtclClassBase.hpp b/tools/src/librtcltools/RtclClassBase.hpp
index b37f7215..3e616093 100644
--- a/tools/src/librtcltools/RtclClassBase.hpp
+++ b/tools/src/librtcltools/RtclClassBase.hpp
@@ -1,4 +1,4 @@
-// $Id: RtclClassBase.hpp 983 2018-01-02 20:35:59Z mueller $
+// $Id: RtclClassBase.hpp 1052 2018-09-30 08:10:52Z mueller $
 //
 // Copyright 2011-2013 by Walter F.J. Mueller <W.F.J.Mueller@gsi.de>
 //
@@ -42,8 +42,8 @@ namespace Retro {
       Tcl_Command        Token() const;
 
     // some constants (also defined in cpp)
-      static const int kOK  = TCL_OK;       //<!
-      static const int kERR = TCL_ERROR;    //<!
+      static const int kOK  = TCL_OK;       //!<
+      static const int kERR = TCL_ERROR;    //!<
 
     protected:
       void          SetType(const std::string& type);
diff --git a/tools/src/librtcltools/RtclCmdBase.hpp b/tools/src/librtcltools/RtclCmdBase.hpp
index 5a7d77b1..a698c802 100644
--- a/tools/src/librtcltools/RtclCmdBase.hpp
+++ b/tools/src/librtcltools/RtclCmdBase.hpp
@@ -1,4 +1,4 @@
-// $Id: RtclCmdBase.hpp 983 2018-01-02 20:35:59Z mueller $
+// $Id: RtclCmdBase.hpp 1052 2018-09-30 08:10:52Z mueller $
 //
 // Copyright 2013-2017 by Walter F.J. Mueller <W.F.J.Mueller@gsi.de>
 //
@@ -58,8 +58,8 @@ namespace Retro {
       bool          TstMeth(const std::string& name);
         
     // some constants (also defined in cpp)
-      static const int kOK  = TCL_OK;       //<!
-      static const int kERR = TCL_ERROR;    //<!
+      static const int kOK  = TCL_OK;       //!<
+      static const int kERR = TCL_ERROR;    //!<
 
     protected:
       bool          GetArgsDump(RtclArgs& args, int& detail);
diff --git a/tools/src/librw11/Rw11CntlPC11.hpp b/tools/src/librw11/Rw11CntlPC11.hpp
index b1596f53..27b7fff5 100644
--- a/tools/src/librw11/Rw11CntlPC11.hpp
+++ b/tools/src/librw11/Rw11CntlPC11.hpp
@@ -1,4 +1,4 @@
-// $Id: Rw11CntlPC11.hpp 983 2018-01-02 20:35:59Z mueller $
+// $Id: Rw11CntlPC11.hpp 1052 2018-09-30 08:10:52Z mueller $
 //
 // Copyright 2013-2017 by Walter F.J. Mueller <W.F.J.Mueller@gsi.de>
 //
@@ -59,8 +59,8 @@ namespace Retro {
       static const uint16_t kPCSR = 004;  //!< PCSR reg offset
       static const uint16_t kPBUF = 006;  //!< PBUF reg offset
 
-      static const uint16_t kUnit_PR   = 0;   //<! unit number of paper reader 
-      static const uint16_t kUnit_PP   = 1;   //<! unit number of paper puncher 
+      static const uint16_t kUnit_PR   = 0;   //!< unit number of paper reader 
+      static const uint16_t kUnit_PP   = 1;   //!< unit number of paper puncher 
 
       static const uint16_t kProbeOff = kRCSR; //!< probe address offset (rcsr)
       static const bool     kProbeInt = true;  //!< probe int active
diff --git a/tools/src/librw11/Rw11UnitTape.hpp b/tools/src/librw11/Rw11UnitTape.hpp
index 57ea4d10..49dad357 100644
--- a/tools/src/librw11/Rw11UnitTape.hpp
+++ b/tools/src/librw11/Rw11UnitTape.hpp
@@ -1,4 +1,4 @@
-// $Id: Rw11UnitTape.hpp 983 2018-01-02 20:35:59Z mueller $
+// $Id: Rw11UnitTape.hpp 1052 2018-09-30 08:10:52Z mueller $
 //
 // Copyright 2015-2017 by Walter F.J. Mueller <W.F.J.Mueller@gsi.de>
 //
@@ -76,7 +76,7 @@ namespace Retro {
       std::string   fType;                  //!< drive type
       bool          fEnabled;               //!< unit enabled
       bool          fWProt;                 //!< unit write protected
-      size_t        fCapacity;              //<! capacity in byte (0=unlimited)
+      size_t        fCapacity;              //!< capacity in byte (0=unlimited)
   };
   
 } // end namespace Retro
diff --git a/tools/src/librw11/Rw11UnitTerm.hpp b/tools/src/librw11/Rw11UnitTerm.hpp
index c13abd91..42d58b05 100644
--- a/tools/src/librw11/Rw11UnitTerm.hpp
+++ b/tools/src/librw11/Rw11UnitTerm.hpp
@@ -1,4 +1,4 @@
-// $Id: Rw11UnitTerm.hpp 983 2018-01-02 20:35:59Z mueller $
+// $Id: Rw11UnitTerm.hpp 1052 2018-09-30 08:10:52Z mueller $
 //
 // Copyright 2013-2017 by Walter F.J. Mueller <W.F.J.Mueller@gsi.de>
 //
@@ -80,15 +80,15 @@ namespace Retro {
       virtual void  AttachDone();
 
     protected:
-      bool          fTo7bit;                //<! discard parity bit on output
-      bool          fToEnpc;                //<! escape non-printables on output
-      bool          fTi7bit;                //<! discard parity bit on input
-      std::deque<uint8_t>  fRcvQueue;       //<! input queue
-      std::string   fLogFname;              //<! log file name
-      std::ofstream fLogStream;             //<! log file stream
-      bool          fLogOptCrlf;            //<! log file: crlf option given
-      bool          fLogCrPend;             //<! log file: cr pending
-      bool          fLogLfLast;             //<! log file: lf was last char
+      bool          fTo7bit;                //!< discard parity bit on output
+      bool          fToEnpc;                //!< escape non-printables on output
+      bool          fTi7bit;                //!< discard parity bit on input
+      std::deque<uint8_t>  fRcvQueue;       //!< input queue
+      std::string   fLogFname;              //!< log file name
+      std::ofstream fLogStream;             //!< log file stream
+      bool          fLogOptCrlf;            //!< log file: crlf option given
+      bool          fLogCrPend;             //!< log file: cr pending
+      bool          fLogLfLast;             //!< log file: lf was last char
   };
   
 } // end namespace Retro
diff --git a/tools/src/librw11/Rw11Virt.hpp b/tools/src/librw11/Rw11Virt.hpp
index 4a780c27..65b469b3 100644
--- a/tools/src/librw11/Rw11Virt.hpp
+++ b/tools/src/librw11/Rw11Virt.hpp
@@ -1,4 +1,4 @@
-// $Id: Rw11Virt.hpp 983 2018-01-02 20:35:59Z mueller $
+// $Id: Rw11Virt.hpp 1052 2018-09-30 08:10:52Z mueller $
 //
 // Copyright 2013-2017 by Walter F.J. Mueller <W.F.J.Mueller@gsi.de>
 //
@@ -69,10 +69,10 @@ namespace Retro {
       };    
 
     protected:
-      Rw11Unit*     fpUnit;                 //<! back ref to unit
+      Rw11Unit*     fpUnit;                 //!< back ref to unit
       RparseUrl     fUrl;
-      bool          fWProt;                 //<! write protected
-      Rstats        fStats;                 //<! statistics
+      bool          fWProt;                 //!< write protected
+      Rstats        fStats;                 //!< statistics
   };
   
 } // end namespace Retro
diff --git a/tools/src/librw11/Rw11VirtDisk.hpp b/tools/src/librw11/Rw11VirtDisk.hpp
index 785a0409..80432b04 100644
--- a/tools/src/librw11/Rw11VirtDisk.hpp
+++ b/tools/src/librw11/Rw11VirtDisk.hpp
@@ -1,4 +1,4 @@
-// $Id: Rw11VirtDisk.hpp 983 2018-01-02 20:35:59Z mueller $
+// $Id: Rw11VirtDisk.hpp 1052 2018-09-30 08:10:52Z mueller $
 //
 // Copyright 2013-2017 by Walter F.J. Mueller <W.F.J.Mueller@gsi.de>
 //
@@ -67,11 +67,11 @@ namespace Retro {
       };    
 
     protected:
-      size_t        fBlkSize;               //<! block size in byte
-      size_t        fNBlock;                //<! disk size in blocks
+      size_t        fBlkSize;               //!< block size in byte
+      size_t        fNBlock;                //!< disk size in blocks
     
     protected:
-      static std::string sDefaultScheme;     //<! default scheme
+      static std::string sDefaultScheme;     //!< default scheme
   };
   
 } // end namespace Retro
diff --git a/tools/src/librw11/Rw11VirtEthTap.hpp b/tools/src/librw11/Rw11VirtEthTap.hpp
index a74504af..8ff36a6f 100644
--- a/tools/src/librw11/Rw11VirtEthTap.hpp
+++ b/tools/src/librw11/Rw11VirtEthTap.hpp
@@ -1,4 +1,4 @@
-// $Id: Rw11VirtEthTap.hpp 983 2018-01-02 20:35:59Z mueller $
+// $Id: Rw11VirtEthTap.hpp 1052 2018-09-30 08:10:52Z mueller $
 //
 // Copyright 2014-2017 by Walter F.J. Mueller <W.F.J.Mueller@gsi.de>
 //
@@ -49,7 +49,7 @@ namespace Retro {
       int           RcvPollHandler(const pollfd& pfd);
 
     protected:
-      int           fFd;                    //<! fd for pty master side 
+      int           fFd;                    //!< fd for pty master side 
   };
   
 } // end namespace Retro
diff --git a/tools/src/librw11/Rw11VirtStream.hpp b/tools/src/librw11/Rw11VirtStream.hpp
index 19c4f257..59c31fce 100644
--- a/tools/src/librw11/Rw11VirtStream.hpp
+++ b/tools/src/librw11/Rw11VirtStream.hpp
@@ -1,4 +1,4 @@
-// $Id: Rw11VirtStream.hpp 983 2018-01-02 20:35:59Z mueller $
+// $Id: Rw11VirtStream.hpp 1052 2018-09-30 08:10:52Z mueller $
 //
 // Copyright 2013-2017 by Walter F.J. Mueller <W.F.J.Mueller@gsi.de>
 //
@@ -64,9 +64,9 @@ namespace Retro {
       };    
 
     protected:
-      bool          fIStream;               //<! is input (read only) stream
-      bool          fOStream;               //<! is output (write only) stream
-      FILE*         fFile;                  //<! file ptr
+      bool          fIStream;               //!< is input (read only) stream
+      bool          fOStream;               //!< is output (write only) stream
+      FILE*         fFile;                  //!< file ptr
   };
   
 } // end namespace Retro
diff --git a/tools/src/librw11/Rw11VirtTape.hpp b/tools/src/librw11/Rw11VirtTape.hpp
index bfd5df5a..a6fa6132 100644
--- a/tools/src/librw11/Rw11VirtTape.hpp
+++ b/tools/src/librw11/Rw11VirtTape.hpp
@@ -1,4 +1,4 @@
-// $Id: Rw11VirtTape.hpp 983 2018-01-02 20:35:59Z mueller $
+// $Id: Rw11VirtTape.hpp 1052 2018-09-30 08:10:52Z mueller $
 //
 // Copyright 2015-2017 by Walter F.J. Mueller <W.F.J.Mueller@gsi.de>
 //
@@ -86,22 +86,22 @@ namespace Retro {
 
     // operation code
       enum OpCode {
-        kOpCodeOK = 0,                      //<! operation OK
-        kOpCodeBot,                         //<! ended at BOT
-        kOpCodeEof,                         //<! ended at EOF
-        kOpCodeEom,                         //<! ended at EOM
-        kOpCodeRecLenErr,                   //<! record length error
-        kOpCodeBadParity,                   //<! record with parity error
-        kOpCodeBadFormat                    //<! file format error
+        kOpCodeOK = 0,                      //!< operation OK
+        kOpCodeBot,                         //!< ended at BOT
+        kOpCodeEof,                         //!< ended at EOF
+        kOpCodeEom,                         //!< ended at EOM
+        kOpCodeRecLenErr,                   //!< record length error
+        kOpCodeBadParity,                   //!< record with parity error
+        kOpCodeBadFormat                    //!< file format error
       };
 
     protected:
-      size_t        fCapacity;              //<! capacity in byte (0=unlimited)
-      bool          fBot;                   //<! tape at bot
-      bool          fEot;                   //<! tape beyond eot
-      bool          fEom;                   //<! tape beyond medium
-      int           fPosFile;               //<! tape pos: #files  (-1=unknown)
-      int           fPosRecord;             //<! tape pos: #record (-1=unknown)
+      size_t        fCapacity;              //!< capacity in byte (0=unlimited)
+      bool          fBot;                   //!< tape at bot
+      bool          fEot;                   //!< tape beyond eot
+      bool          fEom;                   //!< tape beyond medium
+      int           fPosFile;               //!< tape pos: #files  (-1=unknown)
+      int           fPosRecord;             //!< tape pos: #record (-1=unknown)
   };
   
 } // end namespace Retro
diff --git a/tools/src/librw11/Rw11VirtTermPty.hpp b/tools/src/librw11/Rw11VirtTermPty.hpp
index bbe2657a..4cf6b698 100644
--- a/tools/src/librw11/Rw11VirtTermPty.hpp
+++ b/tools/src/librw11/Rw11VirtTermPty.hpp
@@ -1,4 +1,4 @@
-// $Id: Rw11VirtTermPty.hpp 983 2018-01-02 20:35:59Z mueller $
+// $Id: Rw11VirtTermPty.hpp 1052 2018-09-30 08:10:52Z mueller $
 //
 // Copyright 2013-2017 by Walter F.J. Mueller <W.F.J.Mueller@gsi.de>
 //
@@ -50,7 +50,7 @@ namespace Retro {
       int           RcvPollHandler(const pollfd& pfd);
 
     protected:
-      int           fFd;                    //<! fd for pty master side 
+      int           fFd;                    //!< fd for pty master side 
   };
   
 } // end namespace Retro