diff --git a/examples/VGA/ClassicRacer/controllers.h b/examples/VGA/ClassicRacer/controllers.h
index 5378faffe..c76e1e8b4 100644
--- a/examples/VGA/ClassicRacer/controllers.h
+++ b/examples/VGA/ClassicRacer/controllers.h
@@ -11,7 +11,7 @@ struct GameController
   int id = 0;     // device number assigned by client
   bool active = false;
 
-  GameController( int id_, gcmode mode_) : id( id_ ), mode(mode_) { }
+  GameController( int id_, gcmode mode_) : mode(mode_), id( id_ )  { }
 
   virtual bool isLeft()     { return false;  };
   virtual bool isRight()    { return false;  };
diff --git a/examples/VGA/ClassicRacer/menu.h b/examples/VGA/ClassicRacer/menu.h
index c84339bff..b68344376 100644
--- a/examples/VGA/ClassicRacer/menu.h
+++ b/examples/VGA/ClassicRacer/menu.h
@@ -20,7 +20,7 @@ struct Menu : public Scene
   
   long menulastactivity = 0;     
   int exitValue = -1;
-  char *textControls[6] = { ".......", " MOUSE ", "JOYSTICK", " ARROWS ", "A S T F ", "Q A O P" };
+  char const *textControls[6] = { ".......", " MOUSE ", "JOYSTICK", " ARROWS ", "A S T F ", "Q A O P" };
   bool lockedControls[6] = { false, false, false, false,false,false };  
     
   void init()  
diff --git a/examples/VGA/ClassicRacer/race.h b/examples/VGA/ClassicRacer/race.h
index 0029bc3c6..893a3a0d7 100644
--- a/examples/VGA/ClassicRacer/race.h
+++ b/examples/VGA/ClassicRacer/race.h
@@ -534,7 +534,7 @@ struct Race : public Scene
     sprintf( buffer, "SCORE:  %4d",      players[player].points );
     slowDrawText( players[player].minx + 2 * 8 + 1, 11 * 8, buffer );
 
-    sprintf( buffer, "TIME : %02d:%02d", (currentTime / 1000) / 60,  (currentTime / 1000) % 60 );
+    sprintf( buffer, "TIME : %02ld:%02ld", (currentTime / 1000) / 60,  (currentTime / 1000) % 60 );
     slowDrawText( players[player].minx + 2 * 8 + 1, 12 * 8, buffer );
 
     sprintf( buffer, "CARS :  %4d", players[player].cars  );
diff --git a/examples/VGA/ClassicRacer/score.h b/examples/VGA/ClassicRacer/score.h
index 06bc1d4e0..be741bd9e 100644
--- a/examples/VGA/ClassicRacer/score.h
+++ b/examples/VGA/ClassicRacer/score.h
@@ -173,7 +173,7 @@ struct Score : public Scene
                                               bitmap_mouse_data, bitmap_joystick_data,
                                               bitmap_keybb_data, bitmap_keyba_data,  bitmap_keybo_data  };
       
-    int nselected = 1;
+    //int nselected = 1;
     
     canvas.setBrushColor(RGB888(0, 0xff, 0));
     canvas.clear();
@@ -310,7 +310,7 @@ struct Score : public Scene
         }
       }
 
-        canvas.setPenColor(millis()%250 > 125 == 0 ? RGB888(0,255,0):scorecolors[editItem] );  
+        canvas.setPenColor( millis() % 250 == 0 ? RGB888(0,255,0) : scorecolors[editItem] );  
         canvas.setBrushColor(RGB888(0,255,0) );             
         canvas.drawChar((9+editInitial)*8, 12*8, top[editItem].initials[editInitial]);      
         canvas.waitCompletion(); 
diff --git a/examples/VGA/ClassicRacer/soundchip.h b/examples/VGA/ClassicRacer/soundchip.h
index 0b6445a13..6e7997994 100644
--- a/examples/VGA/ClassicRacer/soundchip.h
+++ b/examples/VGA/ClassicRacer/soundchip.h
@@ -29,7 +29,7 @@ void iPlaySound( void *pvParameters )
 {
   playsounddata psd = *(playsounddata *)pvParameters;
 
-  WaveformGenerator *pwave;
+  WaveformGenerator *pwave = nullptr;
   if ( psd.wave == WAVE_SQUARE)   pwave = new SquareWaveformGenerator();
   if ( psd.wave == WAVE_SINE)     pwave = new SineWaveformGenerator();
   if ( psd.wave == WAVE_TRIANGLE) pwave = new TriangleWaveformGenerator();
diff --git a/examples/VGA/DirectVGA_ElMuro/controllers.h b/examples/VGA/DirectVGA_ElMuro/controllers.h
index 5378faffe..8c16968ca 100644
--- a/examples/VGA/DirectVGA_ElMuro/controllers.h
+++ b/examples/VGA/DirectVGA_ElMuro/controllers.h
@@ -11,7 +11,7 @@ struct GameController
   int id = 0;     // device number assigned by client
   bool active = false;
 
-  GameController( int id_, gcmode mode_) : id( id_ ), mode(mode_) { }
+  GameController( int id_, gcmode mode_) : mode(mode_), id( id_ ) { }
 
   virtual bool isLeft()     { return false;  };
   virtual bool isRight()    { return false;  };
diff --git a/examples/VGA/DirectVGA_ElMuro/soundchip.h b/examples/VGA/DirectVGA_ElMuro/soundchip.h
index 7e390ffe3..f62b9d71c 100644
--- a/examples/VGA/DirectVGA_ElMuro/soundchip.h
+++ b/examples/VGA/DirectVGA_ElMuro/soundchip.h
@@ -29,7 +29,7 @@ void iPlaySound( void *pvParameters )
 {
   playsounddata psd = *(playsounddata *)pvParameters;
 
-  WaveformGenerator *pwave;
+  WaveformGenerator *pwave = nullptr;
   if ( psd.wave == WAVE_SQUARE)   pwave = new SquareWaveformGenerator();
   if ( psd.wave == WAVE_SINE)     pwave = new SineWaveformGenerator();
   if ( psd.wave == WAVE_TRIANGLE) pwave = new TriangleWaveformGenerator();
diff --git a/examples/VGA/Songs/Songs.ino b/examples/VGA/Songs/Songs.ino
index 3148a9f63..498320a1d 100644
--- a/examples/VGA/Songs/Songs.ino
+++ b/examples/VGA/Songs/Songs.ino
@@ -63,7 +63,7 @@ void iPlaySound( void *pvParameters )
 {
   playsounddata psd = *(playsounddata *)pvParameters;
 
-  WaveformGenerator *pwave;
+  WaveformGenerator *pwave = nullptr;
   if ( psd.wave == WAVE_SQUARE)   pwave = new SquareWaveformGenerator();
   if ( psd.wave == WAVE_SINE)     pwave = new SineWaveformGenerator();
   if ( psd.wave == WAVE_TRIANGLE) pwave = new TriangleWaveformGenerator();
@@ -200,7 +200,7 @@ char const * noteToDelayEx(char const * note, int * delayMS)
   if (val > 0)
     *delayMS = 250 * val;
 
-  while (*note && isdigit(*note) || *note == '.')
+  while ((*note && isdigit(*note)) || *note == '.')
     ++note;
     
   return note;
diff --git a/examples/VGA/VIC20/VIC20.ino b/examples/VGA/VIC20/VIC20.ino
index 288a641ae..504bba32f 100644
--- a/examples/VGA/VIC20/VIC20.ino
+++ b/examples/VGA/VIC20/VIC20.ino
@@ -351,6 +351,9 @@ class Menu : public uiApp {
         case VirtualKey::VK_F12:
           runVIC20();
           break;
+        // just to avoid compiler warning
+        default:
+          break;
       }
     };
 
@@ -372,6 +375,9 @@ class Menu : public uiApp {
             updateFreeSpaceLabel();
           }
           break;
+        // just to avoid compiler warning
+        default:
+          break;
       }
     };
 
@@ -430,7 +436,7 @@ class Menu : public uiApp {
 
     // RAM expansion options
     y += 50;
-    auto lbl = new uiLabel(rootWindow(), "RAM Expansion:", Point(150, y), Size(0, 0), true, STYLE_LABELGROUP);
+    new uiLabel(rootWindow(), "RAM Expansion:", Point(150, y), Size(0, 0), true, STYLE_LABELGROUP);
     RAMExpComboBox = new uiComboBox(rootWindow(), Point(158, y + 20), Size(75, 19), 130, true, STYLE_COMBOBOX);
     char const * RAMOPTS[] = { "Unexpanded", "3K", "8K", "16K", "24K", "27K (24K+3K)", "32K", "35K (32K+3K)" };
     for (int i = 0; i < 8; ++i)
@@ -442,7 +448,7 @@ class Menu : public uiApp {
 
     // joystick emulation options
     y += 50;
-    lbl = new uiLabel(rootWindow(), "Joystick:", Point(150, y), Size(0, 0), true, STYLE_LABELGROUP);
+    new uiLabel(rootWindow(), "Joystick:", Point(150, y), Size(0, 0), true, STYLE_LABELGROUP);
     new uiLabel(rootWindow(), "None", Point(180, y + 21), Size(0, 0), true, STYLE_LABEL);
     auto radioJNone = new uiCheckBox(rootWindow(), Point(158, y + 20), Size(16, 16), uiCheckBoxKind::RadioButton, true, STYLE_CHECKBOX);
     new uiLabel(rootWindow(), "Cursor Keys", Point(180, y + 41), Size(0, 0), true, STYLE_LABEL);
@@ -464,7 +470,7 @@ class Menu : public uiApp {
     updateFreeSpaceLabel();
 
     // "Download From" label
-    auto downloadFromLbl = new uiLabel(rootWindow(), "Download From:", Point(5, 326), Size(0, 0), true, STYLE_LABELGROUP);
+    new uiLabel(rootWindow(), "Download From:", Point(5, 326), Size(0, 0), true, STYLE_LABELGROUP);
 
     // Download List button (download programs listed and linked in LIST_URL)
     auto downloadProgsBtn = new uiButton(rootWindow(), "List", Point(13, 345), Size(27, 20), uiButtonKind::Button, true, STYLE_BUTTON);
@@ -893,4 +899,3 @@ void loop()
   auto menu = new Menu;
   menu->run(&DisplayController);
 }
-
diff --git a/src/devdrivers/keyboard.cpp b/src/devdrivers/keyboard.cpp
index 5295bb823..e413d885d 100644
--- a/src/devdrivers/keyboard.cpp
+++ b/src/devdrivers/keyboard.cpp
@@ -45,8 +45,8 @@ int Keyboard::scancodeToVirtualKeyTaskStackSize = FABGLIB_DEFAULT_SCODETOVK_TASK
 
 Keyboard::Keyboard()
   : m_keyboardAvailable(false),
-    m_lastDeadKey(VK_NONE),
-    m_scancodeSet(2)
+    m_scancodeSet(2),
+    m_lastDeadKey(VK_NONE)
 {
 }
 
@@ -560,6 +560,8 @@ VirtualKey Keyboard::scancodeToVK(uint8_t scancode, bool isExtended, KeyboardLay
       case VK_KP_PAGEUP:
         vk = VK_KP_9;
         break;
+      default:
+        break;
     }
   }
 
diff --git a/src/dispdrivers/vgadirectcontroller.cpp b/src/dispdrivers/vgadirectcontroller.cpp
index cfdb6091d..5d4199841 100755
--- a/src/dispdrivers/vgadirectcontroller.cpp
+++ b/src/dispdrivers/vgadirectcontroller.cpp
@@ -64,10 +64,10 @@ bool                     VGADirectController::s_VSync;
 
 
 VGADirectController::VGADirectController(bool autoRun)
-  : m_drawScanlineCallback(nullptr),
-    m_autoRun(autoRun),
-    m_linesCount(2),
-    m_lines(nullptr)
+  : m_linesCount(2),
+    m_lines(nullptr),
+    m_drawScanlineCallback(nullptr),
+    m_autoRun(autoRun)
 {
   s_instance = this;
 }