Sega Saturn

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The Sega Saturn (セガサターン, Sega Satān^?) is a 32-bit video game console, first released on November 22, 1994 in Japan, May 11, 1995 in North America and July 8, 1995 in Europe.

The system was supported in North America and Europe until late 1998, and in Japan until the end of 2000. The last official game for the system, Yukyu Gensokyoku Perpetual Collection, was released by Mediaworks in December of that year.

Development

Sega's 27-member Away Team, comprising employees from every aspect of hardware engineering, product development and marketing, worked exclusively for two years to ensure the Sega Saturn's hardware and design met the precise needs of both the U.S. and Japanese markets. The Saturn was a powerful machine for the time, but its design, with two CPUs and 6 other processors, made harnessing its power extremely difficult. Many of the ancillary chips in the system were "off of the shelf" components. This increased the complexity of the design since less custom hardware was used. Rumours suggest that the original design called for a single central processor (making for an excellent 2D gaming experience but with very limited 3D capability), but a second processor was added late in development to increase 3D performance.

Third-party development was further hindered by the initial lack of useful software libraries and development tools, requiring developers to write in assembly language to achieve decent performance. Programmers would often utilize only one CPU to simplify development in titles such as Alien Trilogy.

The main disadvantage of the dual CPU architecture was that both processors shared the same bus, and besides 4K of on-chip memory, all data and program code for both CPUs were located in the same shared 2 MB of main memory. This meant that without very careful division of processing, the second CPU would often have to wait while the first CPU was working, reducing its processing ability.

The hardware also lacked light sourcing and hardware video decompression support. Nevertheless, when properly utilized, the dual processors in the Saturn could produce impressive results such as the 1997 ports of Quake and Duke Nukem 3D by Lobotomy Software, and later games like Burning Rangers were able to achieve true transparency effects on hardware that used simple polygon stipples as a replacement for transparency effects in the past.

Read more at Wikipedia.org