Sega Dreamcast, with a zip drive, will bow in Sept.

The launch of a new generation of game systems will begin in the U.S. on September 9, when Sega brings its new Dreamcast video game console, already available in Japan, to North America. The 128-bit system, which has already sold more than 1 million units in Japan, will carry a surprisingly low retail price of$199.

Sega will begin selling the next-generation unit well in advance, with a $100 million marketing and advertising campaign, hoping that a bombastic launch will firmly establish...