Dedicted Pong Unit
PONG, a video game that simulates a game of Ping-Pong between two players, has a long and pervasive history, and is said to be the first video game ever created.Here is a dual player mode, two-dimensional PONG unit. This unit sends a black and white NTSC video signal to a television and includes two separate control units for each player.The control pads include a linear position slider and a knob to control y- and x-axis movements of the PONG paddle, as well as an LED scoring and winning indicator.
   Dedicted Pong Unit
More detail on Dedicted Pong Unit website
instruct1.cit.cornell.edu