In comparison to multiple microprocessor controlled TV games, the game dedicated ICs differ quite a lot. The video game IC discussed here is a fine example of game IC which provides a selection of tennis, soccer, squash, practice, and two rifle shooting games. It can be a surprising fact that this multi-feature IC is the simplest form of game dedicated IC, available on the market. To add more, second IC can be included in the circuit to provide a colorful impact on the game.
The video game circuit offers two ports for input of two players in tennis, soccer and squash, and separate inputs for the rifle game. The game control inputs permit the player to select the game features such as size of the racket or the width of the soccer player, the speed of the ball, the rebound angles of the ball, and either automatic or manual ball service. To extend the entertainment feature, an audio output is also fitted at the external portion such that it produces sounds at the TV set in correspondence to the particular action sequence of the game. The sync output provides the horizontal synchronizing signal, and separate video outputs indicate the position of the two players, the ball and an outline of the field and the display of the score. In this circuit, the only electronic input signal required is a suitable clock. This clock input must be synchronized to 3.58 MHz .i.e. the color subcarrier frequency, if it is to be used with a color generator IC.IC of this types are employed along with a video modulator so as to produce an RF signal, which can be connected to the TV set through the antenna terminals and the user can enjoy the game flawlessly.
The basic key parameters of video game circuit are discussed hereby:
There are no specified terms to describe the working units of this project. Even, the manufacturers don’t offer specified list of electrical equipments. Some features every specialized game circuit posses can be listed in points below:
- Battery powered,
- Operated at room temperature,
- Generate audio, video and sync signals that are within the standard American TV signal specifications.
Applications of video game circuit
As stated above, this type of IC is employed in dedicated TV games.
In addition to the simple ball and paddle game IC described above, other ICs are available for such games as road race, warfare, wipeout, shooting gallery, battle, motorcycle, etc. Such ICs are produced in large quantity by different manufacturer, and are not interchangeable with another IC. For detailed information, consult manufacturer data.