diff --git a/src/debugger/gui/DataGridWidget.cxx b/src/debugger/gui/DataGridWidget.cxx
index d11375d29..9e75a955f 100644
--- a/src/debugger/gui/DataGridWidget.cxx
+++ b/src/debugger/gui/DataGridWidget.cxx
@@ -583,13 +583,14 @@ int DataGridWidget::getToolTipIndex(Common::Point pos) const
 string DataGridWidget::getToolTip(Common::Point pos) const
 {
   const Int32 val = _valueList[getToolTipIndex(pos)];
-  const string hex = Common::Base::toString(val, Common::Base::Fmt::_16);
-  const string dec = Common::Base::toString(val, Common::Base::Fmt::_10);
-  const string bin = Common::Base::toString(val, Common::Base::Fmt::_2);
   ostringstream buf;
 
-  // TODO: time leading spaces and zeroes
-  buf << "$" << hex << " = #" << dec << " = %" << bin;
+  buf << _toolTipText
+    << "$" << Common::Base::toString(val, Common::Base::Fmt::_16)
+    << " = #" << val;
+  if(val < 0x100)
+    buf << " = %" << Common::Base::toString(val, Common::Base::Fmt::_2);
+
   return buf.str();
 }
 
diff --git a/src/debugger/gui/DebuggerDialog.cxx b/src/debugger/gui/DebuggerDialog.cxx
index b8c0662ee..07e530ac6 100644
--- a/src/debugger/gui/DebuggerDialog.cxx
+++ b/src/debugger/gui/DebuggerDialog.cxx
@@ -18,6 +18,7 @@
 #include "Cart.hxx"
 #include "Widget.hxx"
 #include "Dialog.hxx"
+#include "ToolTip.hxx"
 #include "Settings.hxx"
 #include "StellaKeys.hxx"
 #include "EventHandler.hxx"
@@ -406,6 +407,7 @@ void DebuggerDialog::createFont()
         break;
     }
   }
+  tooltip().setFont(*myNFont);
 }
 
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
diff --git a/src/debugger/gui/RomListWidget.cxx b/src/debugger/gui/RomListWidget.cxx
index 58d392ee9..e595fc6aa 100644
--- a/src/debugger/gui/RomListWidget.cxx
+++ b/src/debugger/gui/RomListWidget.cxx
@@ -442,6 +442,69 @@ void RomListWidget::lostFocusWidget()
   abortEditMode();
 }
 
+// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+Common::Point RomListWidget::getToolTipIndex(Common::Point pos) const
+{
+  const Common::Rect& r = getEditRect();
+  const int col = (pos.x - r.x() - getAbsX()) / _font.getMaxCharWidth();
+  const int row = (pos.y - getAbsY()) / _lineHeight;
+
+  if(col < 0)
+    return Common::Point(-1, -1);
+  else
+    return Common::Point(col, row + _currentPos);
+}
+
+// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+string RomListWidget::getToolTip(Common::Point pos) const
+{
+  const Common::Point idx = getToolTipIndex(pos);
+
+  if(idx.y == -1)
+    return EmptyString;
+
+  const string bytes = myDisasm->list[idx.y].bytes;
+
+  if(bytes.length() < idx.x + 1)
+    return EmptyString;
+
+  Int32 val;
+  if(bytes.length() == 8 && bytes[2] != ' ')
+  {
+    // Binary value
+    val = stol(bytes, 0, 2);
+  }
+  else
+  {
+    // hex 1..3 values
+    if(idx.x % 3 == 2)
+      // Skip gaps between hex values
+      return EmptyString;
+
+    // Get one hex byte
+    const string valStr = bytes.substr((idx.x / 3) * 3, 2);
+
+    val = stol(valStr, 0, 16);
+
+  }
+  ostringstream buf;
+
+  buf << _toolTipText
+    << "$" << Common::Base::toString(val, Common::Base::Fmt::_16)
+    << " = #" << val;
+  if(val < 0x100)
+    buf << " = %" << Common::Base::toString(val, Common::Base::Fmt::_2);
+
+  return buf.str();
+}
+
+// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+bool RomListWidget::changedToolTip(Common::Point oldPos, Common::Point newPos) const
+{
+  return getToolTipIndex(oldPos) != getToolTipIndex(newPos);
+}
+
+
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 void RomListWidget::drawWidget(bool hilite)
 {
diff --git a/src/debugger/gui/RomListWidget.hxx b/src/debugger/gui/RomListWidget.hxx
index 37473d12f..3f26d217f 100644
--- a/src/debugger/gui/RomListWidget.hxx
+++ b/src/debugger/gui/RomListWidget.hxx
@@ -56,6 +56,9 @@ class RomListWidget : public EditableWidget
     void setSelected(int item);
     void setHighlighted(int item);
 
+    string getToolTip(Common::Point pos) const override;
+    bool changedToolTip(Common::Point oldPos, Common::Point newPos) const override;
+
   protected:
     void handleMouseDown(int x, int y, MouseButton b, int clickCount) override;
     void handleMouseUp(int x, int y, MouseButton b, int clickCount) override;
@@ -77,11 +80,15 @@ class RomListWidget : public EditableWidget
     void endEditMode() override;
     void abortEditMode() override;
     void lostFocusWidget() override;
+
+    bool hasToolTip() const override { return true; }
+
     void scrollToSelected()    { scrollToCurrent(_selectedItem);    }
     void scrollToHighlighted() { scrollToCurrent(_highlightedItem); }
 
   private:
     void scrollToCurrent(int item);
+    Common::Point getToolTipIndex(Common::Point pos) const;
 
   private:
     unique_ptr<RomListSettings> myMenu;
diff --git a/src/debugger/gui/ToggleWidget.cxx b/src/debugger/gui/ToggleWidget.cxx
index 60f4ee154..e20544783 100644
--- a/src/debugger/gui/ToggleWidget.cxx
+++ b/src/debugger/gui/ToggleWidget.cxx
@@ -223,6 +223,7 @@ string ToggleWidget::getToolTip(Common::Point pos) const
 {
   const int idx = getToolTipIndex(pos);
   Int32 val = 0;
+  ostringstream buf;
 
   if(_swapBits)
     for(int col = _cols - 1; col >= 0; --col)
@@ -238,13 +239,12 @@ string ToggleWidget::getToolTip(Common::Point pos) const
     }
   val <<= _shiftBits;
 
-  const string hex = Common::Base::toString(val, Common::Base::Fmt::_16);
-  const string dec = Common::Base::toString(val, Common::Base::Fmt::_10);
-  const string bin = Common::Base::toString(val, Common::Base::Fmt::_2);
-  ostringstream buf;
+  buf << _toolTipText
+    << "$" << Common::Base::toString(val, Common::Base::Fmt::_16)
+    << " = #" << val;
+  if(val < 0x100)
+    buf << " = %" << Common::Base::toString(val, Common::Base::Fmt::_2);
 
-  // TODO: time leading spaces and zeroes
-  buf << "$" << hex << " = #" << dec << " = %" << bin;
   return buf.str();
 }
 
diff --git a/src/gui/LauncherDialog.cxx b/src/gui/LauncherDialog.cxx
index 9c140e15c..5092299ec 100644
--- a/src/gui/LauncherDialog.cxx
+++ b/src/gui/LauncherDialog.cxx
@@ -30,6 +30,7 @@
 #include "StellaSettingsDialog.hxx"
 #include "WhatsNewDialog.hxx"
 #include "MessageBox.hxx"
+#include "ToolTip.hxx"
 #include "OSystem.hxx"
 #include "FrameBuffer.hxx"
 #include "FBSurface.hxx"
@@ -56,8 +57,7 @@
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 LauncherDialog::LauncherDialog(OSystem& osystem, DialogContainer& parent,
                                int x, int y, int w, int h)
-  : Dialog(osystem, parent, osystem.frameBuffer().launcherFont(), "",
-           x, y, w, h)
+  : Dialog(osystem, parent, x, y, w, h)
 {
   myUseMinimalUI = instance().settings().getBool("minimal_ui");
 
@@ -80,6 +80,8 @@ LauncherDialog::LauncherDialog(OSystem& osystem, DialogContainer& parent,
   const string& lblAllFiles = "Show all files";
   const string& lblFound = "XXXX items found";
 
+  tooltip().setFont(font);
+
   lwidth = font.getStringWidth(lblRom);
   lwidth2 = font.getStringWidth(lblAllFiles) + CheckboxWidget::boxSize(font);
   int lwidth3 = font.getStringWidth(lblFilter);
diff --git a/src/gui/ToolTip.cxx b/src/gui/ToolTip.cxx
index 36c8b1b20..85f5bedf4 100644
--- a/src/gui/ToolTip.cxx
+++ b/src/gui/ToolTip.cxx
@@ -32,16 +32,24 @@
 // + disable when in edit mode
 // - option to disable tips
 // - multi line tips
-// - nicer formating of DataDridWidget tip
-// - allow reversing ToogleWidget (TooglePixelWidget)
-// - shift checkbox bits
+// + nicer formating of DataDridWidget tip
+// + allow reversing ToogleWidget (TooglePixelWidget)
+// + shift checkbox bits
 // - RomListWidget (hex codes, maybe disassembly operands)
 
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 ToolTip::ToolTip(Dialog& dialog, const GUI::Font& font)
-  : myDialog(dialog),
-    myFont(font)
+  : myDialog(dialog)
 {
+  myScale = myDialog.instance().frameBuffer().hidpiScaleFactor();
+
+  setFont(font);
+}
+
+// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+void ToolTip::setFont(const GUI::Font& font)
+{
+  myFont = &font;
   const int fontWidth = font.getMaxCharWidth(),
     fontHeight = font.getFontHeight();
 
@@ -51,7 +59,6 @@ ToolTip::ToolTip(Dialog& dialog, const GUI::Font& font)
   myHeight = fontHeight + myTextYOfs * 2;
 
   mySurface = myDialog.instance().frameBuffer().allocateSurface(myWidth, myHeight);
-  myScale = myDialog.instance().frameBuffer().hidpiScaleFactor();
 }
 
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
@@ -86,7 +93,7 @@ void ToolTip::release()
 {
   if(myTipShown)
   {
-    myTimer = DELAY_TIME;
+    myTimer = DELAY_TIME - 1;
 
     myTipShown = false;
     myDialog.setDirtyChain();
@@ -118,7 +125,16 @@ void ToolTip::show()
   const uInt32 V_GAP = 1;
   const uInt32 H_CURSOR = 18;
   string text = myTipWidget->getToolTip(myPos);
-  uInt32 width = std::min(myWidth, myFont.getStringWidth(text) + myTextXOfs * 2);
+
+  myTipShown = true;
+  if(text.empty())
+  {
+    release();
+    return;
+  }
+
+  uInt32 width = std::min(myWidth, myFont->getStringWidth(text) + myTextXOfs * 2);
+  //uInt32 height = std::min(myHeight, font.getFontHeight() + myTextYOfs * 2);
   // Note: The rects include HiDPI scaling
   const Common::Rect imageRect = myDialog.instance().frameBuffer().imageRect();
   const Common::Rect dialogRect = myDialog.surface().dstRect();
@@ -142,7 +158,7 @@ void ToolTip::show()
 
   mySurface->frameRect(0, 0, width, myHeight, kColor);
   mySurface->fillRect(1, 1, width - 2, myHeight - 2, kWidColor);
-  mySurface->drawString(myFont, text, myTextXOfs, myTextYOfs,
+  mySurface->drawString(*myFont, text, myTextXOfs, myTextYOfs,
                         width - myTextXOfs * 2, myHeight - myTextYOfs * 2, kTextColor);
 
   myTipShown = true;
diff --git a/src/gui/ToolTip.hxx b/src/gui/ToolTip.hxx
index b3bbf547a..879200c06 100644
--- a/src/gui/ToolTip.hxx
+++ b/src/gui/ToolTip.hxx
@@ -40,6 +40,8 @@ class ToolTip
     ToolTip(Dialog& dialog, const GUI::Font& font);
     ~ToolTip() = default;
 
+    void setFont(const GUI::Font& font);
+
     /**
       Request a tooltip display.
     */
@@ -73,7 +75,7 @@ class ToolTip
     static constexpr uInt32 DELAY_TIME = 45; // display delay
 
     Dialog& myDialog;
-    const GUI::Font& myFont;
+    const GUI::Font* myFont{nullptr};
     const Widget* myTipWidget{nullptr};
     const Widget* myFocusWidget{nullptr};