joypad clear buttons fn

src/processor/memory/mmio/joypad.rs

@@ -63,18 +63,7 @@ impl Joypad {
         gamepads: ConnectedGamepadsIterator,
     ) -> bool {
         let old = *self;
-        *self = Joypad {
+        self.clear_buttons();
-            sel_action: self.sel_action,
-            sel_direction: self.sel_direction,
-            down: false,
-            up: false,
-            left: false,
-            right: false,
-            start: false,
-            select: false,
-            b: false,
-            a: false,
-        };
         for (_, pad) in gamepads {
             self.down |= pad.is_pressed(Button::DPadDown);
             self.up |= pad.is_pressed(Button::DPadUp);
@@ -95,6 +84,17 @@ impl Joypad {
         self.b |= keys.contains(&Key::Semicolon);
         *self != old
     }
+
+    fn clear_buttons(&mut self) {
+        self.down = false;
+        self.up = false;
+        self.left = false;
+        self.right = false;
+        self.start = false;
+        self.select = false;
+        self.a = false;
+        self.b = false;
+    }
 }
 
 impl Default for Joypad {