Editing Commodore 64 (section)

=== Joysticks, mice, and paddles ===
{{multiple image|perrow=2|total_width=275
 | align  = right
 | image1 = Commodore CX-40-style white and black joystick.jpg <!-- Optional image: https://en.wikipedia.org/wiki/File:Commodore_Joystick_model_1311.jpg -->
 | alt1   = Original Commodore white and black joystick
 | image2 = Commodore-Paddles.JPG
 | alt2   = Commodore analog paddles
 | image3 = Commodore blockomaus.jpg
 | alt3   = Commodore mouse
 | image4 = Joystick Eingänge C64.jpg
 | alt4   = The DE-9 Atari-style joystick ports
 | footer = ''(from top)'' Commodore's version of the Atari joystick; a set of analog paddles; a 1350/1351 mouse, and DE-9 Atari-style joystick ports
}}
The C64 retained the VIC-20's [[D-subminiature|DE-9]] [[Atari joystick port]] and added another; any Atari-specification game controller can be used on a C64. The joysticks are read from the registers at {{mono|$DC00}} and {{mono|$DC01}}, and most software is designed to use a joystick in port 2 for control rather than port 1; the upper bits of {{mono|$DC00}} are used by the keyboard, and an I/O conflict can result. Although it is possible to use [[Sega]] [[gamepad]]s on a C64, it is not recommended; their slightly different signal can damage the [[MOS Technology CIA|CIA]] chip. The [[MOS Technology 6581|SID chip]]'s register {{mono|$D419}}, used to control paddles, is an analog input. A handful of games, primarily released early in the computer's life cycle, can use paddles. In 1986, Commodore released two mice for the C64 and C128: the 1350 and [[Commodore 1351|1351]]. The 1350 is a digital device read from the joystick registers, and can be used with any program supporting joystick input. The 1351 is an analog [[potentiometer]]-based mouse, read with the SID's [[analog-to-digital converter]].