Properly emulate no joysticks available

ioC0Page.go

@@ -38,7 +38,7 @@ type SpeakerProvider interface {
 // JoysticksProvider declares de the joysticks
 type JoysticksProvider interface {
 	ReadButton(i int) bool
-	ReadPaddle(i int) uint8
+	ReadPaddle(i int) (uint8, bool)
 }
 
 // See https://www.kreativekorp.com/miscpages/a2info/iomemory.shtml

softSwitches2.go

@@ -154,9 +154,12 @@ const paddleToCyclesFactor = 11
 func getPaddleSoftSwitch(i int) softSwitchR {
 	return func(io *ioC0Page) uint8 {
 		if io.joysticks == nil {
-			return 127
+			return 255 // Capacitors never discharge if there is not joystick
+		}
+		reading, hasData := io.joysticks.ReadPaddle(i)
+		if !hasData {
+			return 255 // Capacitors never discharge if there is not joystick
 		}
-		reading := io.joysticks.ReadPaddle(i)
 		cyclesNeeded := uint64(reading) * paddleToCyclesFactor
 		cyclesElapsed := io.apple2.cpu.GetCycles() - io.paddlesStrobeCycle
 		if cyclesElapsed < cyclesNeeded {