diff --git a/src/debugger/gui/QuadTariWidget.cxx b/src/debugger/gui/QuadTariWidget.cxx
new file mode 100644
index 000000000..aca263a86
--- /dev/null
+++ b/src/debugger/gui/QuadTariWidget.cxx
@@ -0,0 +1,73 @@
+//============================================================================
+//
+//   SSSS    tt          lll  lll
+//  SS  SS   tt           ll   ll
+//  SS     tttttt  eeee   ll   ll   aaaa
+//   SSSS    tt   ee  ee  ll   ll      aa
+//      SS   tt   eeeeee  ll   ll   aaaaa  --  "An Atari 2600 VCS Emulator"
+//  SS  SS   tt   ee      ll   ll  aa  aa
+//   SSSS     ttt  eeeee llll llll  aaaaa
+//
+// Copyright (c) 1995-2020 by Bradford W. Mott, Stephen Anthony
+// and the Stella Team
+//
+// See the file "License.txt" for information on usage and redistribution of
+// this file, and for a DISCLAIMER OF ALL WARRANTIES.
+//============================================================================
+
+#include "OSystem.hxx"
+#include "Console.hxx"
+#include "TIA.hxx"
+#include "QuadTari.hxx"
+#include "JoystickWidget.hxx"
+#include "NullControlWidget.hxx"
+#include "QuadTariWidget.hxx"
+
+// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+QuadTariWidget::QuadTariWidget(GuiObject* boss, const GUI::Font& font,
+                               int x, int y, Controller& controller)
+  : ControllerWidget(boss, font, x, y, controller)
+{
+  string label = (isLeftPort() ? "Left" : "Right") + string(" (QuadTari)");
+  StaticTextWidget* t = new StaticTextWidget(boss, font, x, y + 2, label);
+  QuadTari& qt = dynamic_cast<QuadTari&>(controller);
+
+  x += font.getMaxCharWidth() * 2;
+  y = t->getBottom() + font.getFontHeight() * 1.25;
+
+  // TODO: support multiple controller types
+  switch(qt.myFirstController->type())
+  {
+    case Controller::Type::Joystick:
+      myFirstControl = new JoystickWidget(boss, font, x, y, *qt.myFirstController, true);
+      x = myFirstControl->getRight() - font.getMaxCharWidth() * 8;
+      break;
+
+    default:
+      myFirstControl = new NullControlWidget(boss, font, x, y, *qt.myFirstController);
+      x += font.getMaxCharWidth() * 8;
+      break;
+  }
+
+  switch(qt.mySecondController->type())
+  {
+    case Controller::Type::Joystick:
+      mySecondControl = new JoystickWidget(boss, font, x, y, *qt.mySecondController, true);
+      break;
+
+    default:
+      mySecondControl = new NullControlWidget(boss, font, x, y, *qt.mySecondController);
+      break;
+  }
+
+  myPointer = new StaticTextWidget(boss, font,
+                                   x - font.getMaxCharWidth() * 5, y, "  ");
+}
+
+// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+void QuadTariWidget::loadConfig()
+{
+  bool first = !(instance().console().tia().registerValue(VBLANK) & 0x80);
+
+  myPointer->setLabel(first ? "<-" : "->");
+}
diff --git a/src/debugger/gui/QuadTariWidget.hxx b/src/debugger/gui/QuadTariWidget.hxx
new file mode 100644
index 000000000..cccdf1575
--- /dev/null
+++ b/src/debugger/gui/QuadTariWidget.hxx
@@ -0,0 +1,52 @@
+//============================================================================
+//
+//   SSSS    tt          lll  lll
+//  SS  SS   tt           ll   ll
+//  SS     tttttt  eeee   ll   ll   aaaa
+//   SSSS    tt   ee  ee  ll   ll      aa
+//      SS   tt   eeeeee  ll   ll   aaaaa  --  "An Atari 2600 VCS Emulator"
+//  SS  SS   tt   ee      ll   ll  aa  aa
+//   SSSS     ttt  eeeee llll llll  aaaaa
+//
+// Copyright (c) 1995-2020 by Bradford W. Mott, Stephen Anthony
+// and the Stella Team
+//
+// See the file "License.txt" for information on usage and redistribution of
+// this file, and for a DISCLAIMER OF ALL WARRANTIES.
+//============================================================================
+
+#ifndef QUADTARI_WIDGET_HXX
+#define QUADTARI_WIDGET_HXX
+
+#include "Control.hxx"
+#include "ControllerWidget.hxx"
+
+class QuadTariWidget: public ControllerWidget
+{
+  public:
+    QuadTariWidget(GuiObject* boss, const GUI::Font& font, int x, int y,
+                   Controller& controller);
+    ~QuadTariWidget() override = default;
+
+  protected:
+    virtual string getHeader()
+    {
+      return (isLeftPort() ? "Left (" : "Right (") + string("QuadTari)");
+    }
+
+  private:
+    ControllerWidget* myFirstControl{nullptr};
+    ControllerWidget* mySecondControl{nullptr};
+    StaticTextWidget* myPointer{nullptr};
+
+    void loadConfig() override;
+
+    // Following constructors and assignment operators not supported
+    QuadTariWidget() = delete;
+    QuadTariWidget(const QuadTariWidget&) = delete;
+    QuadTariWidget(QuadTariWidget&&) = delete;
+    QuadTariWidget& operator=(const QuadTariWidget&) = delete;
+    QuadTariWidget& operator=(QuadTariWidget&&) = delete;
+};
+
+#endif