diff --git a/Changes.txt b/Changes.txt
index 570dee040..ceb81aac6 100644
--- a/Changes.txt
+++ b/Changes.txt
@@ -27,6 +27,10 @@
     loading a ROM would always point to the last opened ROM, not to the one
     currently selected.
 
+  * Fixed bug in storing ROM properties; in some cases, a copy of the
+    ROM properties was being stored in the external file when it was
+    exactly the same as the internal entry.
+
   * Added more C++11 updates all over the codebase, and ran Stella
     through Coverity for the first time.  I'm proud to say that Stella
     now has a 0.00 defect rate!
diff --git a/docs/index.html b/docs/index.html
index facd6f0e0..2db5110ea 100644
--- a/docs/index.html
+++ b/docs/index.html
@@ -3330,7 +3330,10 @@ Ms Pac-Man (Stella extended codes):
         <tr><td>5 </td><td>Driving 1</td></tr>
         <tr><td>6 </td><td>MindLink 0</td></tr>
         <tr><td>7 </td><td>MindLink 1</td></tr>
-      </table></td>
+      </table>
+      An <I>optional</I> second parameter (default of 100) indicates how much
+      of the paddle range that the mouse should emulate.
+      </td>
     </tr>
 
 <!--
diff --git a/src/common/MouseControl.cxx b/src/common/MouseControl.cxx
index db66ea3f8..ddf20038a 100644
--- a/src/common/MouseControl.cxx
+++ b/src/common/MouseControl.cxx
@@ -19,6 +19,7 @@
 
 #include "Console.hxx"
 #include "Control.hxx"
+#include "Paddles.hxx"
 #include "Props.hxx"
 
 #include "MouseControl.hxx"
@@ -30,17 +31,21 @@ MouseControl::MouseControl(Console& console, const string& mode)
     myRightController(console.rightController()),
     myCurrentModeNum(0)
 {
-  if(BSPF_equalsIgnoreCase(mode, "none"))
+  istringstream m_axis(mode);
+  string m_mode;
+  m_axis >> m_mode;
+
+  if(BSPF_equalsIgnoreCase(m_mode, "none"))
   {
     myModeList.push_back(MouseMode("Mouse input is disabled"));
     return;
   }
-  else if(!BSPF_equalsIgnoreCase(mode, "auto") && mode.length() == 2 &&
-          mode[0] >= '0' && mode[0] <= '8' &&
-          mode[1] >= '0' && mode[1] <= '8')
+  else if(!BSPF_equalsIgnoreCase(m_mode, "auto") && m_mode.length() == 2 &&
+          m_mode[0] >= '0' && m_mode[0] <= '8' &&
+          m_mode[1] >= '0' && m_mode[1] <= '8')
   {
-    Axis xaxis = Axis(int(mode[0]) - '0');
-    Axis yaxis = Axis(int(mode[1]) - '0');
+    Axis xaxis = Axis(int(m_mode[0]) - '0');
+    Axis yaxis = Axis(int(m_mode[1]) - '0');
     ostringstream msg;
     msg << "Mouse X-axis is ";
     Controller::Type xtype = Controller::Joystick, ytype = Controller::Joystick;
@@ -155,6 +160,13 @@ MouseControl::MouseControl(Console& console, const string& mode)
     addLeftControllerModes(noswap);
   }
 
+  // Set range information (currently only for paddles, but may be used
+  // for other controllers in the future)
+  int m_range = 100;
+  if(!(m_axis >> m_range))
+    m_range = 100;
+  Paddles::setPaddleRange(m_range);
+
   // If the mouse isn't used at all, we still need one item in the list
   if(myModeList.size() == 0)
     myModeList.push_back(MouseMode("Mouse not used for current controllers"));
diff --git a/src/gui/GameInfoDialog.cxx b/src/gui/GameInfoDialog.cxx
index ac854db59..3785e7cd7 100644
--- a/src/gui/GameInfoDialog.cxx
+++ b/src/gui/GameInfoDialog.cxx
@@ -248,7 +248,7 @@ GameInfoDialog::GameInfoDialog(
   lwidth = font.getStringWidth("Mouse axis mode: ");
   pwidth = font.getStringWidth("Specific axis");
   items.clear();
-  VarList::push_back(items, "Automatic", "auto");
+  VarList::push_back(items, "Automatic", "AUTO");
   VarList::push_back(items, "Specific axis", "specific");
   myMouseControl =
     new PopUpWidget(myTab, font, xpos, ypos, pwidth, lineHeight, items,
@@ -279,6 +279,18 @@ GameInfoDialog::GameInfoDialog(
                "Y-Axis is: ", lwidth);
   wid.push_back(myMouseY);
 
+  xpos = 10;  ypos += lineHeight + 8;
+  lwidth = font.getStringWidth("Mouse axis range: ");
+  myMouseRange = new SliderWidget(myTab, font, xpos, ypos, 8*fontWidth, lineHeight,
+                                  "Mouse axis range: ", lwidth, kMRangeChanged);
+  myMouseRange->setMinValue(1); myMouseRange->setMaxValue(100);
+  wid.push_back(myMouseRange);
+
+  myMouseRangeLabel = new StaticTextWidget(myTab, font,
+                            xpos + myMouseRange->getWidth() + 4, ypos+1,
+                            3*fontWidth, fontHeight, "", kTextAlignLeft);
+  myMouseRangeLabel->setFlags(WIDGET_CLEARBG);
+
   // Add items for tab 2
   addToFocusList(wid, myTab, tabID);
 
@@ -337,7 +349,7 @@ GameInfoDialog::GameInfoDialog(
   wid.push_back(myPPBlend);
 
   myPPBlendLabel = new StaticTextWidget(myTab, font,
-                                        xpos + lwidth + myPhosphor->getWidth() + 10 + \
+                                        xpos + lwidth + myPhosphor->getWidth() + 10 +
                                         myPPBlend->getWidth() + 4, ypos+1,
                                         3*fontWidth, fontHeight, "", kTextAlignLeft);
   myPPBlendLabel->setFlags(WIDGET_CLEARBG);
@@ -419,8 +431,12 @@ void GameInfoDialog::loadView()
   myP0Controller->setSelected(myGameProperties.get(Controller_Left), "JOYSTICK");
   myP1Controller->setSelected(myGameProperties.get(Controller_Right), "JOYSTICK");
   mySwapPaddles->setSelected(myGameProperties.get(Controller_SwapPaddles), "NO");
-  const string& mcontrol = myGameProperties.get(Controller_MouseAxis);
-  bool autoAxis = BSPF_equalsIgnoreCase(mcontrol, "auto");
+
+  // MouseAxis property (potentially contains 'range' information)
+  istringstream m_axis(myGameProperties.get(Controller_MouseAxis));
+  string m_control, m_range;
+  m_axis >> m_control;
+  bool autoAxis = BSPF_equalsIgnoreCase(m_control, "AUTO");
   if(autoAxis)
   {
     myMouseControl->setSelectedIndex(0);
@@ -430,11 +446,21 @@ void GameInfoDialog::loadView()
   else
   {
     myMouseControl->setSelectedIndex(1);
-    myMouseX->setSelected(mcontrol[0] - '0');
-    myMouseY->setSelected(mcontrol[1] - '0');
+    myMouseX->setSelected(m_control[0] - '0');
+    myMouseY->setSelected(m_control[1] - '0');
   }
   myMouseX->setEnabled(!autoAxis);
   myMouseY->setEnabled(!autoAxis);
+  if(m_axis >> m_range)
+  {
+    myMouseRange->setValue(atoi(m_range.c_str()));
+    myMouseRangeLabel->setLabel(m_range);
+  }
+  else
+  {
+    myMouseRange->setValue(100);
+    myMouseRangeLabel->setLabel("100");
+  }
 
   // Display properties
   myFormat->setSelected(myGameProperties.get(Display_Format), "AUTO");
@@ -479,10 +505,15 @@ void GameInfoDialog::saveConfig()
   myGameProperties.set(Console_SwapPorts,
     myLeftPort->getSelectedTag().toString() == "L" ? "NO" : "YES");
   myGameProperties.set(Controller_SwapPaddles, mySwapPaddles->getSelectedTag().toString());
+
+  // MouseAxis property (potentially contains 'range' information)
   string mcontrol = myMouseControl->getSelectedTag().toString();
-  if(mcontrol != "auto")
+  if(mcontrol != "AUTO")
     mcontrol = myMouseX->getSelectedTag().toString() +
                myMouseY->getSelectedTag().toString();
+  string range = myMouseRangeLabel->getLabel();
+  if(range != "100")
+    mcontrol += " " + range;
   myGameProperties.set(Controller_MouseAxis, mcontrol);
 
   // Display properties
@@ -498,10 +529,9 @@ void GameInfoDialog::saveConfig()
   else
     instance().propSet().insert(myGameProperties);
 
-  // In any event, inform the Console and save the properties
+  // In any event, inform the Console
   if(instance().hasConsole())
     instance().console().setProperties(myGameProperties);
-  instance().propSet().save(instance().propertiesFile());
 }
 
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
@@ -553,6 +583,10 @@ void GameInfoDialog::handleCommand(CommandSender* sender, int cmd,
       myPPBlendLabel->setValue(myPPBlend->getValue());
       break;
 
+    case kMRangeChanged:
+      myMouseRangeLabel->setValue(myMouseRange->getValue());
+      break;
+
     case kMCtrlChanged:
     {
       bool state = myMouseControl->getSelectedTag().toString() != "auto";
diff --git a/src/gui/GameInfoDialog.hxx b/src/gui/GameInfoDialog.hxx
index 74db9f7af..46aa40651 100644
--- a/src/gui/GameInfoDialog.hxx
+++ b/src/gui/GameInfoDialog.hxx
@@ -66,14 +66,16 @@ class GameInfoDialog : public Dialog, public CommandSender
     PopUpWidget* myTVType;
 
     // Controller properties
-    PopUpWidget* myP0Controller;
-    PopUpWidget* myP1Controller;
-    PopUpWidget* mySwapPaddles;
-    PopUpWidget* myLeftPort;
-    PopUpWidget* myRightPort;
-    PopUpWidget* myMouseControl;
-    PopUpWidget* myMouseX;
-    PopUpWidget* myMouseY;
+    PopUpWidget*      myP0Controller;
+    PopUpWidget*      myP1Controller;
+    PopUpWidget*      mySwapPaddles;
+    PopUpWidget*      myLeftPort;
+    PopUpWidget*      myRightPort;
+    PopUpWidget*      myMouseControl;
+    PopUpWidget*      myMouseX;
+    PopUpWidget*      myMouseY;
+    SliderWidget*     myMouseRange;
+    StaticTextWidget* myMouseRangeLabel;
 
     // Display properties
     PopUpWidget*      myFormat;
@@ -86,6 +88,7 @@ class GameInfoDialog : public Dialog, public CommandSender
     enum {
       kLeftCChanged    = 'LCch',
       kRightCChanged   = 'RCch',
+      kMRangeChanged   = 'MRch',
       kPhosphorChanged = 'PPch',
       kPPBlendChanged  = 'PBch',
       kMCtrlChanged    = 'MCch'