diff --git a/src/common/PJoystickHandler.cxx b/src/common/PJoystickHandler.cxx
index 588886760..e6e4cfba2 100644
--- a/src/common/PJoystickHandler.cxx
+++ b/src/common/PJoystickHandler.cxx
@@ -33,7 +33,9 @@ static constexpr char CTRL_DELIM = '^';
 PhysicalJoystickHandler::PhysicalJoystickHandler(
       OSystem& system, EventHandler& handler)
   : myOSystem(system),
-    myHandler(handler)
+    myHandler(handler),
+    myLeftMode(EventMode::kEmulationMode),
+    myRightMode(EventMode::kEmulationMode)
 {
   Int32 version = myOSystem.settings().getInt("event_ver");
   // Load previously saved joystick mapping (if any) from settings
diff --git a/src/common/PKeyboardHandler.cxx b/src/common/PKeyboardHandler.cxx
index 245f32abf..aa68a55a2 100644
--- a/src/common/PKeyboardHandler.cxx
+++ b/src/common/PKeyboardHandler.cxx
@@ -42,7 +42,9 @@ static constexpr int MOD3 = KBDM_ALT;
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 PhysicalKeyboardHandler::PhysicalKeyboardHandler(OSystem& system, EventHandler& handler)
   : myOSystem(system),
-    myHandler(handler)
+    myHandler(handler),
+    myLeftMode(EventMode::kEmulationMode),
+    myRightMode(EventMode::kEmulationMode)
 #ifdef BSPF_UNIX
     , myAltKeyCounter(0)
 #endif
diff --git a/src/common/StaggeredLogger.cxx b/src/common/StaggeredLogger.cxx
index f72fd1a74..5de05e923 100644
--- a/src/common/StaggeredLogger.cxx
+++ b/src/common/StaggeredLogger.cxx
@@ -46,8 +46,10 @@ StaggeredLogger::StaggeredLogger(const string& message, Logger::Level level)
     myCurrentIntervalFactor(1),
     myCooldownTime(1000),
     myTimer(new TimerManager()),
+    myTimerId(0),
     myTimerCallbackId(0)
-{}
+{
+}
 
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 StaggeredLogger::~StaggeredLogger()
diff --git a/src/common/StaggeredLogger.hxx b/src/common/StaggeredLogger.hxx
index 9f59a6f98..2a69e2d82 100644
--- a/src/common/StaggeredLogger.hxx
+++ b/src/common/StaggeredLogger.hxx
@@ -26,13 +26,15 @@
 #include "bspf.hxx"
 #include "TimerManager.hxx"
 #include "Logger.hxx"
+
 /**
  * This class buffers log events and logs them after a certain time window has expired.
  * The timout increases after every log line by a factor of two until a maximum is reached.
  * If no events are reported, the window size decreases again.
  */
 
-class StaggeredLogger {
+class StaggeredLogger
+{
   public:
 
     StaggeredLogger(const string& message, Logger::Level level);
diff --git a/src/common/main.cxx b/src/common/main.cxx
index 3caca17bb..80e14b182 100644
--- a/src/common/main.cxx
+++ b/src/common/main.cxx
@@ -167,7 +167,15 @@ int main(int ac, char* av[])
   if (isProfilingRun(ac, av)) {
     ProfilingRunner runner(ac, av);
 
-    return runner.run() ? 0 : 1;
+    try
+    {
+      return runner.run() ? 0 : 1;
+    }
+    catch(const runtime_error& e)
+    {
+      cerr << e.what() << endl;
+      return 0;
+    }
   }
 
   unique_ptr<OSystem> theOSystem;
diff --git a/src/debugger/gui/TiaZoomWidget.cxx b/src/debugger/gui/TiaZoomWidget.cxx
index f38d0365c..db5425ee4 100644
--- a/src/debugger/gui/TiaZoomWidget.cxx
+++ b/src/debugger/gui/TiaZoomWidget.cxx
@@ -49,7 +49,7 @@ TiaZoomWidget::TiaZoomWidget(GuiObject* boss, const GUI::Font& font,
   myZoomLevel = 2;
   myNumCols = (_w - 4) / myZoomLevel;
   myNumRows = (_h - 4) / myZoomLevel;
-  myOffX = myOffY = 0;
+  myOffX = myOffY = myOffXLo = myOffYLo = 0;
 
   myMouseMoving = false;
   myClickX = myClickY = 0;
diff --git a/src/emucore/CartCDF.cxx b/src/emucore/CartCDF.cxx
index a3b8d92f1..6d8b0dc21 100644
--- a/src/emucore/CartCDF.cxx
+++ b/src/emucore/CartCDF.cxx
@@ -123,7 +123,8 @@ void CartridgeCDF::setInitialState()
   myMode = 0xFF;
 
   myBankOffset = myLDAimmediateOperandAddress = myJMPoperandAddress = 0;
-  myFastJumpActive = 0;
+  myFastJumpActive = myFastJumpStream = 0;
+
 }
 
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
diff --git a/src/emucore/CartDPC.cxx b/src/emucore/CartDPC.cxx
index e25ecf093..759f24324 100644
--- a/src/emucore/CartDPC.cxx
+++ b/src/emucore/CartDPC.cxx
@@ -26,7 +26,8 @@ CartridgeDPC::CartridgeDPC(const ByteBuffer& image, size_t size,
     mySize(size),
     myAudioCycles(0),
     myFractionalClocks(0.0),
-    myBankOffset(0)
+    myBankOffset(0),
+    myDpcPitch(0.0)
 {
   // Make a copy of the entire image
   std::copy_n(image.get(), std::min(myImage.size(), size), myImage.begin());
diff --git a/src/emucore/Console.cxx b/src/emucore/Console.cxx
index ac5a822b9..c45f4644d 100644
--- a/src/emucore/Console.cxx
+++ b/src/emucore/Console.cxx
@@ -821,7 +821,7 @@ void Console::setControllers(const string& romMd5)
     const bool swappedPorts = myProperties.get(PropType::Console_SwapPorts) == "YES";
 
     // Try to detect controllers
-    if(image != nullptr || size != 0)
+    if(image != nullptr && size != 0)
     {
       leftType = ControllerDetector::detectType(image, size, leftType,
           !swappedPorts ? Controller::Jack::Left : Controller::Jack::Right, myOSystem.settings());
diff --git a/src/emucore/EventHandler.cxx b/src/emucore/EventHandler.cxx
index e4f4f9472..333533d4d 100644
--- a/src/emucore/EventHandler.cxx
+++ b/src/emucore/EventHandler.cxx
@@ -242,14 +242,14 @@ void EventHandler::poll(uInt64 time)
       myOSystem.png().updateTime(time);
   #endif
   }
+#ifdef GUI_SUPPORT
   else if(myOverlay)
   {
-  #ifdef GUI_SUPPORT
     // Update the current dialog container at regular intervals
     // Used to implement continuous events
     myOverlay->updateTime(time);
-  #endif
   }
+#endif
 
   // Turn off all mouse-related items; if they haven't been taken care of
   // in the previous ::update() methods, they're now invalid
@@ -902,7 +902,7 @@ void EventHandler::handleEvent(Event::Type event, Int32 value, bool repeated)
   }
 
   // Otherwise, pass it to the emulation core
-  if (!repeated)
+  if(!repeated)
     myEvent.set(event, value);
 }
 
@@ -1006,43 +1006,55 @@ bool EventHandler::changeStateByEvent(Event::Type type)
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 void EventHandler::setActionMappings(EventMode mode)
 {
-  int listsize = 0;
-  ActionList* list = nullptr;
-
   switch(mode)
   {
     case EventMode::kEmulationMode:
-      listsize = EMUL_ACTIONLIST_SIZE;
-      list     = ourEmulActionList;
+      // Fill the EmulActionList with the current key and joystick mappings
+      for(auto& item: ourEmulActionList)
+      {
+        Event::Type event = item.event;
+        item.key = "None";
+        string key = myPKeyHandler->getMappingDesc(event, mode);
+
+    #ifdef JOYSTICK_SUPPORT
+        string joydesc = myPJoyHandler->getMappingDesc(event, mode);
+        if(joydesc != "")
+        {
+          if(key != "")
+            key += ", ";
+          key += joydesc;
+        }
+    #endif
+
+        if(key != "")
+          item.key = key;
+      }
       break;
     case EventMode::kMenuMode:
-      listsize = MENU_ACTIONLIST_SIZE;
-      list     = ourMenuActionList;
+      // Fill the MenuActionList with the current key and joystick mappings
+      for(auto& item: ourMenuActionList)
+      {
+        Event::Type event = item.event;
+        item.key = "None";
+        string key = myPKeyHandler->getMappingDesc(event, mode);
+
+    #ifdef JOYSTICK_SUPPORT
+        string joydesc = myPJoyHandler->getMappingDesc(event, mode);
+        if(joydesc != "")
+        {
+          if(key != "")
+            key += ", ";
+          key += joydesc;
+        }
+    #endif
+
+        if(key != "")
+          item.key = key;
+      }
       break;
     default:
       return;
   }
-
-  // Fill the ActionList with the current key and joystick mappings
-  for(int i = 0; i < listsize; ++i)
-  {
-    Event::Type event = list[i].event;
-    list[i].key = "None";
-    string key = myPKeyHandler->getMappingDesc(event, mode);
-
-#ifdef JOYSTICK_SUPPORT
-    string joydesc = myPJoyHandler->getMappingDesc(event, mode);
-    if(joydesc != "")
-    {
-      if(key != "")
-        key += ", ";
-      key += joydesc;
-    }
-#endif
-
-    if(key != "")
-      list[i].key = key;
-  }
 }
 
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
@@ -1222,12 +1234,12 @@ StringList EventHandler::getActionList(EventMode mode) const
   switch(mode)
   {
     case EventMode::kEmulationMode:
-      for(uInt32 i = 0; i < EMUL_ACTIONLIST_SIZE; ++i)
-        l.push_back(EventHandler::ourEmulActionList[i].action);
+      for(const auto& item: ourEmulActionList)
+        l.push_back(item.action);
       break;
     case EventMode::kMenuMode:
-      for(uInt32 i = 0; i < MENU_ACTIONLIST_SIZE; ++i)
-        l.push_back(EventHandler::ourMenuActionList[i].action);
+      for(const auto& item: ourMenuActionList)
+        l.push_back(item.action);
       break;
     default:
       break;
@@ -1288,21 +1300,21 @@ StringList EventHandler::getActionList(const Event::EventSet& events, EventMode
   switch(mode)
   {
     case EventMode::kMenuMode:
-      for(uInt32 i = 0; i < MENU_ACTIONLIST_SIZE; ++i)
+      for(const auto& item: ourMenuActionList)
         for(const auto& event : events)
-          if(EventHandler::ourMenuActionList[i].event == event)
+          if(item.event == event)
           {
-            l.push_back(EventHandler::ourMenuActionList[i].action);
+            l.push_back(item.action);
             break;
           }
       break;
 
     default:
-      for(uInt32 i = 0; i < EMUL_ACTIONLIST_SIZE; ++i)
+      for(const auto& item: ourEmulActionList)
         for(const auto& event : events)
-          if(EventHandler::ourEmulActionList[i].event == event)
+          if(item.event == event)
           {
-            l.push_back(EventHandler::ourEmulActionList[i].action);
+            l.push_back(item.action);
             break;
           }
   }
@@ -1317,7 +1329,7 @@ VariantList EventHandler::getComboList(EventMode /**/) const
   ostringstream buf;
 
   VarList::push_back(l, "None", "-1");
-  for(uInt32 i = 0; i < EMUL_ACTIONLIST_SIZE; ++i)
+  for(uInt32 i = 0; i < ourEmulActionList.size(); ++i)
   {
     Event::Type event = EventHandler::ourEmulActionList[i].event;
     // exclude combos events
@@ -1342,7 +1354,7 @@ StringList EventHandler::getComboListForEvent(Event::Type event) const
     for(uInt32 i = 0; i < EVENTS_PER_COMBO; ++i)
     {
       Event::Type e = myComboTable[combo][i];
-      for(uInt32 j = 0; j < EMUL_ACTIONLIST_SIZE; ++j)
+      for(uInt32 j = 0; j < ourEmulActionList.size(); ++j)
       {
         if(EventHandler::ourEmulActionList[j].event == e)
         {
@@ -1366,10 +1378,10 @@ void EventHandler::setComboListForEvent(Event::Type event, const StringList& eve
   {
     assert(events.size() == 8);
     int combo = event - Event::Combo1;
-    for(int i = 0; i < 8; ++i)
+    for(uInt32 i = 0; i < 8; ++i)
     {
-      int idx = atoi(events[i].c_str());
-      if(idx >= 0 && idx < EMUL_ACTIONLIST_SIZE)
+      uInt32 idx = atoi(events[i].c_str());
+      if(idx < ourEmulActionList.size())
         myComboTable[combo][i] = EventHandler::ourEmulActionList[idx].event;
       else
         myComboTable[combo][i] = Event::NoType;
@@ -1385,7 +1397,7 @@ int EventHandler::getEmulActionListIndex(int idx, const Event::EventSet& events)
   //   ordered by 'ourEmulActionList'!
   Event::Type event = Event::NoType;
 
-  for(uInt32 i = 0; i < EMUL_ACTIONLIST_SIZE; ++i)
+  for(uInt32 i = 0; i < ourEmulActionList.size(); ++i)
   {
     for(const auto& item : events)
       if(EventHandler::ourEmulActionList[i].event == item)
@@ -1399,7 +1411,7 @@ int EventHandler::getEmulActionListIndex(int idx, const Event::EventSet& events)
       break;
   }
 
-  for(uInt32 i = 0; i < EMUL_ACTIONLIST_SIZE; ++i)
+  for(uInt32 i = 0; i < ourEmulActionList.size(); ++i)
     if(EventHandler::ourEmulActionList[i].event == event)
       return i;
 
@@ -1457,13 +1469,13 @@ Event::Type EventHandler::eventAtIndex(int idx, Event::Group group) const
   switch(group)
   {
     case Event::Group::Menu:
-      if(index < 0 || index >= MENU_ACTIONLIST_SIZE)
+      if(index < 0 || index >= int(ourMenuActionList.size()))
         return Event::NoType;
       else
         return ourMenuActionList[index].event;
 
     default:
-      if(index < 0 || index >= EMUL_ACTIONLIST_SIZE)
+      if(index < 0 || index >= int(ourEmulActionList.size()))
         return Event::NoType;
       else
         return ourEmulActionList[index].event;
@@ -1478,13 +1490,13 @@ string EventHandler::actionAtIndex(int idx, Event::Group group) const
   switch(group)
   {
     case Event::Group::Menu:
-      if(index < 0 || index >= MENU_ACTIONLIST_SIZE)
+      if(index < 0 || index >= int(ourMenuActionList.size()))
         return EmptyString;
       else
         return ourMenuActionList[index].action;
 
     default:
-      if(index < 0 || index >= EMUL_ACTIONLIST_SIZE)
+      if(index < 0 || index >= int(ourEmulActionList.size()))
         return EmptyString;
       else
         return ourEmulActionList[index].action;
@@ -1499,13 +1511,13 @@ string EventHandler::keyAtIndex(int idx, Event::Group group) const
   switch(group)
   {
     case Event::Group::Menu:
-      if(index < 0 || index >= MENU_ACTIONLIST_SIZE)
+      if(index < 0 || index >= int(ourMenuActionList.size()))
         return EmptyString;
       else
         return ourMenuActionList[index].key;
 
     default:
-      if(index < 0 || index >= EMUL_ACTIONLIST_SIZE)
+      if(index < 0 || index >= int(ourEmulActionList.size()))
         return EmptyString;
       else
         return ourEmulActionList[index].key;
@@ -1710,7 +1722,7 @@ void EventHandler::exitEmulation()
 }
 
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
-EventHandler::ActionList EventHandler::ourEmulActionList[EMUL_ACTIONLIST_SIZE] = {
+EventHandler::EmulActionList EventHandler::ourEmulActionList = { {
   { Event::Quit,                    "Quit",                                  "" },
   { Event::ReloadConsole,           "Reload current ROM/load next game",     "" },
   { Event::ExitMode,                "Exit current Stella menu/mode",         "" },
@@ -1887,10 +1899,10 @@ EventHandler::ActionList EventHandler::ourEmulActionList[EMUL_ACTIONLIST_SIZE] =
   { Event::Combo14,                 "Combo 14",                              "" },
   { Event::Combo15,                 "Combo 15",                              "" },
   { Event::Combo16,                 "Combo 16",                              "" }
-};
+} };
 
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
-EventHandler::ActionList EventHandler::ourMenuActionList[MENU_ACTIONLIST_SIZE] = {
+EventHandler::MenuActionList EventHandler::ourMenuActionList = { {
   { Event::UIUp,              "Move Up",              "" },
   { Event::UIDown,            "Move Down",            "" },
   { Event::UILeft,            "Move Left",            "" },
@@ -1913,7 +1925,7 @@ EventHandler::ActionList EventHandler::ourMenuActionList[MENU_ACTIONLIST_SIZE] =
   { Event::UIPrevDir,         "Parent directory",     "" },
   { Event::ToggleFullScreen,  "Toggle fullscreen",    "" },
   { Event::Quit,              "Quit",                 "" }
-};
+} };
 
 // Event groups
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
diff --git a/src/emucore/EventHandler.hxx b/src/emucore/EventHandler.hxx
index daf267cc8..f0604f515 100644
--- a/src/emucore/EventHandler.hxx
+++ b/src/emucore/EventHandler.hxx
@@ -388,18 +388,6 @@ class EventHandler
     void removePhysicalJoystick(int index);
 
   private:
-    static constexpr Int32
-      COMBO_SIZE           = 16,
-      EVENTS_PER_COMBO     = 8,
-    #ifdef PNG_SUPPORT
-      PNG_SIZE             = 2,
-    #else
-      PNG_SIZE             = 0,
-    #endif
-      EMUL_ACTIONLIST_SIZE = 139 + PNG_SIZE + COMBO_SIZE,
-      MENU_ACTIONLIST_SIZE = 18
-    ;
-
     // Define event groups
     static const Event::EventSet MiscEvents;
     static const Event::EventSet AudioVideoEvents;
@@ -449,9 +437,6 @@ class EventHandler
     // all possible controller modes
     unique_ptr<MouseControl> myMouseControl;
 
-    // The event(s) assigned to each combination event
-    Event::Type myComboTable[COMBO_SIZE][EVENTS_PER_COMBO];
-
     // Indicates the current state of the system (ie, which mode is current)
     EventHandlerState myState;
 
@@ -469,9 +454,28 @@ class EventHandler
     // of the 7800 (for now, only the switches are notified)
     bool myIs7800;
 
+    // These constants are not meant to be used elsewhere; they are only used
+    // here to make it easier for the reader to correctly size the list(s)
+    static constexpr Int32
+      COMBO_SIZE           = 16,
+      EVENTS_PER_COMBO     = 8,
+    #ifdef PNG_SUPPORT
+      PNG_SIZE             = 3,
+    #else
+      PNG_SIZE             = 0,
+    #endif
+      EMUL_ACTIONLIST_SIZE = 138 + PNG_SIZE + COMBO_SIZE,
+      MENU_ACTIONLIST_SIZE = 18
+    ;
+
+    // The event(s) assigned to each combination event
+    Event::Type myComboTable[COMBO_SIZE][EVENTS_PER_COMBO];
+
     // Holds static strings for the remap menu (emulation and menu events)
-    static ActionList ourEmulActionList[EMUL_ACTIONLIST_SIZE];
-    static ActionList ourMenuActionList[MENU_ACTIONLIST_SIZE];
+    using EmulActionList = std::array<ActionList, EMUL_ACTIONLIST_SIZE>;
+    static EmulActionList ourEmulActionList;
+    using MenuActionList = std::array<ActionList, MENU_ACTIONLIST_SIZE>;
+    static MenuActionList ourMenuActionList;
 
     // Following constructors and assignment operators not supported
     EventHandler() = delete;
diff --git a/src/emucore/FrameBuffer.cxx b/src/emucore/FrameBuffer.cxx
index 32bffafe9..1fcabaff7 100644
--- a/src/emucore/FrameBuffer.cxx
+++ b/src/emucore/FrameBuffer.cxx
@@ -56,7 +56,8 @@ FrameBuffer::FrameBuffer(OSystem& osystem)
     myGrabMouse(false),
     myHiDPIAllowed(false),
     myHiDPIEnabled(false),
-    myCurrentModeList(nullptr)
+    myCurrentModeList(nullptr),
+    myTIAMaxZoom(1.0)
 {
 }
 
diff --git a/src/emucore/ProfilingRunner.cxx b/src/emucore/ProfilingRunner.cxx
index a0e8ce7ca..72d68ed30 100644
--- a/src/emucore/ProfilingRunner.cxx
+++ b/src/emucore/ProfilingRunner.cxx
@@ -178,7 +178,7 @@ bool ProfilingRunner::runOne(const ProfilingRun run)
 
   EmulationTiming emulationTiming(frameLayout, consoleTiming);
   uInt64 cycles = 0;
-  uInt64 cyclesTarget = run.runtime * emulationTiming.cyclesPerSecond();
+  uInt64 cyclesTarget = uInt64(run.runtime) * emulationTiming.cyclesPerSecond();
 
   DispatchResult dispatchResult;
   dispatchResult.setOk(0);
diff --git a/src/emucore/tia/frame-manager/FrameLayoutDetector.cxx b/src/emucore/tia/frame-manager/FrameLayoutDetector.cxx
index bc6173367..b1f1f573e 100644
--- a/src/emucore/tia/frame-manager/FrameLayoutDetector.cxx
+++ b/src/emucore/tia/frame-manager/FrameLayoutDetector.cxx
@@ -44,7 +44,10 @@ FrameLayout FrameLayoutDetector::detectedLayout() const{
 
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 FrameLayoutDetector::FrameLayoutDetector()
-  : myState(State::waitForVsyncStart)
+  : myState(State::waitForVsyncStart),
+    myNtscFrames(0),
+    myPalFrames(0),
+    myLinesWaitingForVsyncToStart(0)
 {
   reset();
 }
diff --git a/src/emucore/tia/frame-manager/YStartDetector.cxx b/src/emucore/tia/frame-manager/YStartDetector.cxx
index 5c9e4d60c..bf8d79ab3 100644
--- a/src/emucore/tia/frame-manager/YStartDetector.cxx
+++ b/src/emucore/tia/frame-manager/YStartDetector.cxx
@@ -50,6 +50,11 @@ enum Metrics: uInt32 {
 YStartDetector::YStartDetector()
   : myState(State::waitForVsyncStart),
     myVblankMode(VblankMode::floating),
+    myLinesWaitingForVsyncToStart(0),
+    myCurrentVblankLines(0),
+    myLastVblankLines(0),
+    myVblankViolations(0),
+    myStableVblankFrames(0),
     myVblankViolated(false)
 {
   reset();
diff --git a/src/gui/EventMappingWidget.cxx b/src/gui/EventMappingWidget.cxx
index 6ead20b9c..7be04ed0f 100644
--- a/src/gui/EventMappingWidget.cxx
+++ b/src/gui/EventMappingWidget.cxx
@@ -39,7 +39,7 @@ EventMappingWidget::EventMappingWidget(GuiObject* boss, const GUI::Font& font,
                                        int x, int y, int w, int h,
                                        EventMode mode)
   : Widget(boss, font, x, y, w, h),
-  CommandSender(boss),
+    CommandSender(boss),
     myFilterPopup(nullptr),
     myComboDialog(nullptr),
     myEventMode(mode),
@@ -51,6 +51,8 @@ EventMappingWidget::EventMappingWidget(GuiObject* boss, const GUI::Font& font,
     myLastAxis(JoyAxis::NONE),
     myLastDir(JoyDir::NONE),
     myLastHatDir(JoyHatDir::CENTER),
+    myMod(0),
+    myLastKey(0),
     myLastButton(JOY_CTRL_NONE),
     myFirstTime(true)
 {