The Atari 7800 ProSystem, or simply the Atari 7800, is a home video game console officially released by the Atari Corporation in 1986. It is almost fully backward-compatible with the Atari 2600, the first console to have backward compatibility without the use of additional modules.

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The 7800 has significantly improved graphics hardware over the 2600, but uses the same audio chip. It also shipped with a different model of joystick from the 2600-standard CX40.

 

The 1986 launch is sometimes referred to as a "re-release" or "relaunch" because the Atari 7800 had originally been announced on May 21, 1984, to replace Atari Inc.'s Atari 5200, but a general release was shelved due to the sale of the company.

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