Doing battle in the $9 billion Unix server market is not for the timid. Designing a competitive microprocessor is a costly business, and with the Unix market seemingly in permanent decline it's easy to see why smaller players might drop out. But Fujitsu says it's in it for the long haul. Despite its small market share, the company is committed to developing its Sparc64 chip, and it thinks it has a role to play in keeping IBM from becoming too powerful, said Noriyuki Toyoki, Fujitsu corporate senior vice president and the head of its server division.