Minor documentation/commenting update for Paddle class.

Changes.txt

@@ -33,7 +33,7 @@
     files before starting another instance of the same ROM, when the ROM
     was opened in the ROM launcher.
 
-  * Various improvements to the debugger prompt:
+  * Various improvements to the debugger and command prompt:
     - The 'cls' command now only clears the screen, not the history
     - The 'help' command now accepts other commands, and gives extra
       information about the command (ie, 'help breakif' prints extended
@@ -48,7 +48,9 @@
       and 'trapwrite'
     - Command completion now works with internal functions and pseudo-ops
       (basically, anything starting with the '_' character)
-    - In general, input error checking is much more strictly enforced.
+    - In general, input error checking is much more strictly enforced
+    - Read-only UI items now have a different background color, to
+      clearly indicate if an item can be modified.
 
   * Mouse grabbing is now enabled in windowed mode only when the ROM is
     using a virtual analog controller (paddles, trakball, etc).

src/emucore/Paddles.cxx

@@ -26,7 +26,9 @@ Paddles::Paddles(Jack jack, const Event& event, const System& system,
     myMPaddleIDX(-1),
     myMPaddleIDY(-1)
 {
-  myAnalogPinValue[Nine] = myAnalogPinValue[Five] = 0;
+  // We must start with minimum resistance; see commit
+  // 38b452e1a047a0dca38c5bcce7c271d40f76736e for more information
+  myAnalogPinValue[Nine] = myAnalogPinValue[Five] = minimumResistance;
 
   // The following logic reflects that mapping paddles to different
   // devices can be extremely complex