Altera Comments on Stock Price Movement.

Business Editors

SAN JOSE, Calif.--(BUSINESS WIRE)--Oct. 10, 2000

In reaction to significant downward stock price movement and high trading volume, Altera Corporation (Nasdaq:ALTR) today commented it has provided no update to its previous guidance either formally or informally.

The company's last update of third quarter guidance, available to investors via the internet or audio replay, was made available Aug. 31. At that time, the company reaffirmed its guidance for 15% sequential topline growth. The company has not offered any analysts or investors updates to that guidance previously issued.

The company will announce complete third quarter results on Oct. 16 after the market close, followed by a conference call at 2:00 pm Pacific Daylight Time. A live webcast and replay of the call will be available on the company's web site, www.altera.com. For those without access to the Internet, the live call may be accessed telephonically. Further details are available through the company's investor relations information hotline at 408/544-7707.

About Altera

Altera Corporation, The Programmable Solutions Company(R), was founded in 1983 and is a leading supplier of programmable logic devices (PLDs). Altera's CMOS-based PLDs are user-programmable semiconductor chips that enhance flexibility and reduce time-to-market for companies in the communications, computer peripheral, and industrial markets. By using high performance devices, software development tools, and sophisticated intellectual property cores, system-on-a-programmable-chip (SOPC) solutions can be created with embedded processors, memory, and other complex logic together on a single PLD. Altera common stock is traded on The Nasdaq Stock Market under the symbol ALTR. More information on Altera is available on the Internet at http://www.altera.com.