diff --git a/DCCEXParser.cpp b/DCCEXParser.cpp
index a133a2e..0400ae0 100644
--- a/DCCEXParser.cpp
+++ b/DCCEXParser.cpp
@@ -577,7 +577,7 @@ void DCCEXParser::parseOne(Print *stream, byte *com, RingStream * ringStream)
         {
 	  if (params > 1) break;
 	  if (params==0) { // All
-	    TrackManager::setTrackPower(TRACK_MODE_ALL, POWERMODE::ON);
+	    TrackManager::setTrackPower(TRACK_ALL, POWERMODE::ON);
 	  }
 	  if (params==1) {
 	    if (p[0]=="MAIN"_hk) { // <1 MAIN>
@@ -610,7 +610,7 @@ void DCCEXParser::parseOne(Print *stream, byte *com, RingStream * ringStream)
 	  if (params > 1) break;
 	  if (params==0) { // All
 	    TrackManager::setJoin(false);
-	    TrackManager::setTrackPower(TRACK_MODE_ALL, POWERMODE::OFF);
+	    TrackManager::setTrackPower(TRACK_ALL, POWERMODE::OFF);
 	  }
 	  if (params==1) {
 	    if (p[0]=="MAIN"_hk) { // <0 MAIN>
diff --git a/MotorDriver.cpp b/MotorDriver.cpp
index 749c425..39ec08d 100644
--- a/MotorDriver.cpp
+++ b/MotorDriver.cpp
@@ -576,7 +576,7 @@ void MotorDriver::checkPowerOverload(bool useProgLimit, byte trackno) {
 	DIAG(F("TRACK %c ALERT FAULT"), trackno + 'A');
       }
       setPower(POWERMODE::ALERT);
-      if ((trackMode & TRACK_MODE_AUTOINV) && (trackMode & (TRACK_MODE_MAIN|TRACK_MODE_EXT|TRACK_MODE_BOOST))){
+      if ((trackMode & TRACK_MODIFIER_AUTO) && (trackMode & (TRACK_MODE_MAIN|TRACK_MODE_EXT|TRACK_MODE_BOOST))){
 	DIAG(F("TRACK %c INVERT"), trackno + 'A');
 	invertOutput();
       }
diff --git a/MotorDriver.h b/MotorDriver.h
index 3438c05..269fee7 100644
--- a/MotorDriver.h
+++ b/MotorDriver.h
@@ -29,21 +29,33 @@
 #include <wiring_private.h>
 
 // use powers of two so we can do logical and/or on the track modes in if clauses.
-// RACK_MODE_DCX is (TRACK_MODE_DC|TRACK_MODE_INV)
+// For example TRACK_MODE_DC_INV is (TRACK_MODE_DC|TRACK_MODIFIER_INV)
 template<class T> inline T operator~ (T a) { return (T)~(int)a; }
 template<class T> inline T operator| (T a, T b) { return (T)((int)a | (int)b); }
 template<class T> inline T operator& (T a, T b) { return (T)((int)a & (int)b); }
 template<class T> inline T operator^ (T a, T b) { return (T)((int)a ^ (int)b); }
-enum TRACK_MODE : byte {TRACK_MODE_NONE = 1, TRACK_MODE_MAIN = 2, TRACK_MODE_PROG = 4,
-                        TRACK_MODE_DC = 8, TRACK_MODE_EXT = 16,
+enum TRACK_MODE : byte {
+  // main modes
+  TRACK_MODE_NONE = 1, TRACK_MODE_MAIN = 2, TRACK_MODE_PROG = 4,
+  TRACK_MODE_DC = 8, TRACK_MODE_EXT = 16,
+  // modifiers
+  TRACK_MODIFIER_INV = 64, TRACK_MODIFIER_AUTO = 128,
 #ifdef ARDUINO_ARCH_ESP32
-			TRACK_MODE_BOOST = 32,
+  TRACK_MODE_BOOST = 32,
+  TRACK_MODE_BOOST_INV = TRACK_MODE_BOOST|TRACK_MODIFIER_INV,
+  TRACK_MODE_BOOST_AUTO = TRACK_MODE_BOOST|TRACK_MODIFIER_AUTO,
 #else
-			TRACK_MODE_BOOST = 0,
+  TRACK_MODE_BOOST = 0,
+  TRACK_MODE_BOOST_INV = 0,
+  TRACK_MODE_BOOST_AUTO = 0,
 #endif
-                        TRACK_MODE_ALL = TRACK_MODE_MAIN|TRACK_MODE_PROG|TRACK_MODE_DC|TRACK_MODE_EXT|TRACK_MODE_BOOST,
-                        TRACK_MODE_INV = 64,
-			TRACK_MODE_DCX = TRACK_MODE_DC|TRACK_MODE_INV, TRACK_MODE_AUTOINV = 128};
+  // derived modes; TRACK_ALL is calles that so it does not match TRACK_MODE_*
+  TRACK_ALL = TRACK_MODE_MAIN|TRACK_MODE_PROG|TRACK_MODE_DC|TRACK_MODE_EXT|TRACK_MODE_BOOST,
+  TRACK_MODE_MAIN_INV  =  TRACK_MODE_MAIN|TRACK_MODIFIER_INV,
+  TRACK_MODE_MAIN_AUTO =  TRACK_MODE_MAIN|TRACK_MODIFIER_AUTO,
+  TRACK_MODE_DC_INV =  TRACK_MODE_DC|TRACK_MODIFIER_INV,
+  TRACK_MODE_DCX = TRACK_MODE_DC_INV // DCX is other name for historical reasons
+};
 
 #define setHIGH(fastpin)  *fastpin.inout |= fastpin.maskHIGH
 #define setLOW(fastpin)   *fastpin.inout &= fastpin.maskLOW
@@ -273,7 +285,7 @@ class MotorDriver {
 #endif
   inline void setMode(TRACK_MODE m) {
     trackMode = m;
-    invertOutput(trackMode & TRACK_MODE_INV);
+    invertOutput(trackMode & TRACK_MODIFIER_INV);
   };
   inline void invertOutput() {               // toggles output inversion
     invertPhase = !invertPhase;
diff --git a/TrackManager.cpp b/TrackManager.cpp
index ba9776b..a164142 100644
--- a/TrackManager.cpp
+++ b/TrackManager.cpp
@@ -387,11 +387,15 @@ bool TrackManager::parseEqualSign(Print *stream, int16_t params, int16_t p[])
     if (params>1 && (p[0]<0 || p[0]>=MAX_TRACKS)) 
         return false;
     
-    if (params==2  && p[1]=="MAIN"_hk) // <= id MAIN>
+    if (params==2  && p[1]=="MAIN"_hk)                     // <= id MAIN>
         return setTrackMode(p[0],TRACK_MODE_MAIN);
+    if (params==2  && p[1]=="MAIN_INV"_hk)                 // <= id MAIN_INV>
+        return setTrackMode(p[0],TRACK_MODE_MAIN_INV);
+    if (params==2  && p[1]=="MAIN_AUTO"_hk)                // <= id MAIN_AUTO>
+        return setTrackMode(p[0],TRACK_MODE_MAIN_AUTO);
     
 #ifndef DISABLE_PROG
-    if (params==2  && p[1]=="PROG"_hk) // <= id PROG>
+    if (params==2  && p[1]=="PROG"_hk)                     // <= id PROG>
         return setTrackMode(p[0],TRACK_MODE_PROG);
 #endif
     
@@ -402,20 +406,27 @@ bool TrackManager::parseEqualSign(Print *stream, int16_t params, int16_t p[])
         return setTrackMode(p[0],TRACK_MODE_EXT);
 #ifdef BOOSTER_INPUT
     if (TRACK_MODE_BOOST != 0 &&        // compile time optimization
-	params==2  && p[1]=="BOOST"_hk) // <= id BOOST>
+	params==2  && p[1]=="BOOST"_hk)                    // <= id BOOST>
         return setTrackMode(p[0],TRACK_MODE_BOOST);
+    if (TRACK_MODE_BOOST_INV != 0 &&        // compile time optimization
+	params==2  && p[1]=="BOOST_INV"_hk)                // <= id BOOST_INV>
+        return setTrackMode(p[0],TRACK_MODE_BOOST_INV);
+    if (TRACK_MODE_BOOST_AUTO != 0 &&        // compile time optimization
+	params==2  && p[1]=="BOOST_AUTO"_hk)               // <= id BOOST_AUTO>
+        return setTrackMode(p[0],TRACK_MODE_BOOST_AUTO);
 #endif
-    if (params==2  && p[1]=="AUTO"_hk) // <= id AUTO>
-      return setTrackMode(p[0], track[p[0]]->getMode() | TRACK_MODE_AUTOINV);
+    if (params==2  && p[1]=="AUTO"_hk)                     // <= id AUTO>
+      return setTrackMode(p[0], track[p[0]]->getMode() | TRACK_MODIFIER_AUTO);
 
-    if (params==2  && p[1]=="INV"_hk) // <= id INV>
-      return setTrackMode(p[0], track[p[0]]->getMode() | TRACK_MODE_INV);
+    if (params==2  && p[1]=="INV"_hk)                      // <= id INV>
+      return setTrackMode(p[0], track[p[0]]->getMode() | TRACK_MODIFIER_INV);
 
-    if (params==3  && p[1]=="DC"_hk && p[2]>0) // <= id DC cab>
+    if (params==3  && p[1]=="DC"_hk && p[2]>0)             // <= id DC cab>
         return setTrackMode(p[0],TRACK_MODE_DC,p[2]);
     
-    if (params==3  && p[1]=="DCX"_hk && p[2]>0) // <= id DCX cab>
-        return setTrackMode(p[0],TRACK_MODE_DC|TRACK_MODE_INV,p[2]);
+    if (params==3  && (p[1]=="DC_INV"_hk ||                // <= id DC_INV cab>
+		       p[1]=="DCX"_hk) && p[2]>0)          // <= id DCX cab>
+        return setTrackMode(p[0],TRACK_MODE_DC_INV,p[2]);
 
     return false;
 }
@@ -424,9 +435,9 @@ const FSH* TrackManager::getModeName(TRACK_MODE tm) {
   const FSH *modename=F("---");
   
   if (tm & TRACK_MODE_MAIN) {
-    if(tm & TRACK_MODE_AUTOINV)
+    if(tm & TRACK_MODIFIER_AUTO)
       modename=F("MAIN A");
-    else if (tm & TRACK_MODE_INV)
+    else if (tm & TRACK_MODIFIER_INV)
       modename=F("MAIN I>\n");
     else
       modename=F("MAIN");
@@ -440,15 +451,15 @@ const FSH* TrackManager::getModeName(TRACK_MODE tm) {
   else if(tm & TRACK_MODE_EXT)
     modename=F("EXT");
   else if(tm & TRACK_MODE_BOOST) {
-        if(tm & TRACK_MODE_AUTOINV)
+        if(tm & TRACK_MODIFIER_AUTO)
       modename=F("BOOST A");
-    else if (tm & TRACK_MODE_INV)
+    else if (tm & TRACK_MODIFIER_INV)
       modename=F("BOOST I");
     else
       modename=F("BOOST");
   }
   else if (tm & TRACK_MODE_DC) {
-    if (tm & TRACK_MODE_INV)
+    if (tm & TRACK_MODIFIER_INV)
       modename=F("DCX");
     else
       modename=F("DC");