ProSystem is Atari 7800 emulator for Microsoft Windows. The value of the Atari 7800 varies based on condition and games just like any Atari console will. The Atari 7800 was discontinued January 1, 1992 and succeeded by Atari XEGS. The Atari 7800 ProSystem is a third-generation video game system introduced in June, 1984 as Atari’s premiere 8-Bit console for the 1980s. The Atari 7800 ProSystem was the first game system from Atari Inc. Price guides, Atari 7800 Rarity Guides and Rarity Lists for Atari 7800 Game Cartridges. Please note that overview provided is actually for the variant Atari 7800 ProSystem . View Variant Page The Atari 7800 was released in January 1986 as a successor to the Atari 5200, and was designed by second-party developer General Computer in late 1983. Sadly due to low sales, the general release was stopped. The 7800 features 2-button digital joysticks, near arcade-quality gaming style and graphics, and out-of-the-box compatibility with Atari 2600 games. The value of this console is typically $100-$150 for the console by itself in normal condition. It is written in C++ using the Windows and DirectX API's and allows you to play your favorite Atari 7800 games on PC. The source code is available on GitHub and is maintained by gstanton. The system was designed by an outside company, General Computer Corporation (GCC) in 1983 through 1984 with an intended mass market rollout in June 1984, but was cancelled shortly thereafter due to the sale of the company to Tramiel Technology Ltd on July 2, 1984. Atari 7800 ProSystem.