Namco System 11

The is a 32-bit arcade system board developed jointly by Namco and Sony Computer Entertainment. Released in December 1994, it is a successor to the Namco System 22, the company's first 3D arcade system. The System 11 is directly based on the PlayStation, Sony's first home video game console, using a 512 KB operating system and several custom processors. "Tekken" was the first game to use the System 11. The is an upgraded version of the System 11 that was released in 1996, featuring faster processing power.
History.
Although the System 11 was technically inferior to Sega's Model 2 arcade board, its lower price made it an attractive prospect for smaller arcades. According to the June 1995 issue of "Edge":