Video 2000

Even though most Pong machines had all their games built in, a few variants such as Interton's Video 2000 had cartridges to switch between games.

The Interton Video 2000 was an advanced system for its time. Dedicated PONG chips did not exist yet, so CMOS and TTL chips were often used. The main circuit board of this system contains 14 CMOS chips and other discrete components, and can draw any of the basic graphic objects required for any game: one or two players, the central line, the ball. It also generates sound effects.

The main advantage of this system was the use of cartridges (called cassettes), which allowed playing variants of the classic Ball and Paddle game like Super Tennis (Cartridge 5), which even displayed the scores using two rows of squares. More complex games could be played because the cassettes could generate additional graphic objects. This system grades between the Magnavox Odyssey (which uses cartridges to configure its internal circuits) and later advanced systems like the Philips Tele-Spiel ES-2201 whose cartridges contain additional components that add various game features.

Only five cassettes were released, even though the Video 2000 box shows two more games: Car Race and Naval Battle. Being significantly more complex than others, these two games required much more complicated electronic circuits, which could be the reason why they were never released. However, a Video 2000 clone was made in Spain: Tele-Tenis, which also shows these two games, also supposed to be never released.

Technically, the cassettes configure the games by enabling the required graphics and by setting their size. They can also draw additional graphics like scoring. They also configure the game rules, for example the collision management, etc.

The Interton Video 2000 powers automatically when a cassette is inserted. The video signal can even be tuned using a gray knob located near the cartridge slot, thus allowing fine-tuning on the system instead of the TV. Later TV sets which could normally have troubles tuning on these old games can easily catch the video signals with this clever feature (Philips Tele-Spiel systems also had this feature).

The two controllers used two knobs for horizontal and vertical player motion, and a push-button for serving (or shooting in the unreleased games like Naval Battle).