Mercury Computer Systems and Tundra Unveil Serial RapidIO AdvancedTCA Development Platform

Ensemble Platform Enables Telecom OEMs to Evaluate RapidIO Embedded Fabric Architecture, Reducing Integration Costs and Shortening Time to Market

DALLAS, Texas - April 27, 2004 - Mercury Computer Systems, Inc. (NASDAQ: MRCY) and Tundra Semiconductor Corporation (TSX: TUN) today announced Ensemble, a serial RapidIO® Advanced Telecom Computing Architecture (AdvancedTCA®) development system. Demonstrated for the first time during the keynote address at the Motorola Smart Network Developers Forum (SNDF), the Ensemble platform leverages industry standards including the high-bandwidth, scalable serial RapidIO switch fabric, and AdvancedTCA, to enable telecom equipment manufacturers to start their next-generation infrastructure designs.

“Increased competition in the telecommunications market is forcing service providers to introduce more sophisticated and user-friendly services at an accelerated pace. The market wants a cost-effective and low-risk solution for the required underlying technology,” said Mark Skalabrin, vice president and general manager, OEM Solutions at Mercury Computer Systems. “Mercury developed the Ensemble platform to put the power and functionality of serial RapidIO into the hands of the equipment providers. Ensemble will enable telecom equipment manufacturers to gain valuable application-specific insights into the capabilities of RapidIO as an embedded fabric architecture that will reduce integration costs and shorten time to market.”

The Ensemble platform combines Mercury’s serial RapidIO technology and system-level expertise with Tundra’s parallel RapidIO Tsi500™ Multiport Switch, resulting in reduced integration costs, improved efficiency, and minimal risk for customers as they design and test their next-generation applications. Additionally, because Ensemble is standards-based, it is easily deployed and shortens time to market. Ensemble is an off-the-shelf, multipoint-to-multipoint (full-mesh) architecture. It is capable of supporting the running of up to 15 RapidIO endpoints, such as the Motorola PowerQUICC III processors, switched over RapidIO.

“Our customers want a standards-based prototyping platform where they can benchmark real applications. Ensemble features new technology in a form factor that enables OEMs to readily evaluate the performance and take their products to market,” said Jim Roche, president and CEO of Tundra. “Ensemble demonstrates that RapidIO is the next-generation embedded switch fabric for communications applications.”

About Ensemble
Ensemble’s RapidIO embedded fabric is formed by five mesh-enabled carrier boards, each with onboard aggregate bandwidth of 100 Gbps. Each AdvancedTCA carrier board has three parallel interfaces and one serial interface brought to three mezzanine sites for processor XMCs or front-panel I/O. The mezzanine sites accept IEEE 1386.1 standard PMCs or XMC cards. (The pending VITA 42 standard addresses XMC cards with RapidIO communications.) A fully configured system can encompass 15 mezzanine modules per chassis and as many as 20 separate endpoints, enabling scalability to support application benchmarking tasks.

In addition to the built-in performance and flexibility of the hardware, Mercury makes available a Linux-based software suite for Ensemble to exploit RapidIO’s rich in-band management features. It enables customers to monitor real-time performance, trap on certain events in the switch complex, and detect and mitigate the effects of errors. Ensemble exposes these features to customers, so that in the early deployment phases of RapidIO, customers can experiment and tune applications to the underlying performance characteristics of the network.

Availability
Ensemble will be in testing with beta customers in June, and is expected to be generally available in August 2004.

About Mercury Computer Systems, Inc.
Mercury Computer Systems, Inc. (NASDAQ: MRCY) is the leading supplier of high-performance embedded, real-time digital signal and image processing computer systems. Mercury’s products play a critical role in a wide range of applications, transforming sensor data to information for analysis and interpretation. In military reconnaissance and surveillance platforms the company’s systems process real-time radar, sonar, and signals intelligence data. Mercury’s systems are also used in state-of-the-art medical diagnostic imaging devices including MRI, PET, and digital X-ray, and in semiconductor imaging applications including photomask generation and wafer inspection.

Based in Chelmsford, Massachusetts, Mercury serves customers in North America, Europe and Asia through its direct sales force and a network of subsidiaries and distributors. Visit Mercury on the web: www.mc.com/ensemble.

About Tundra Tundra Semiconductor Corporation designs, develops, and markets standards-based System Interconnect for use by the world's leading communications and storage system companies. Tundra supports RapidIO, VME, and PCI standards. Tundra System Interconnect is a vital communications technology that enables customers to connect critical system components while compressing development cycles and maximizing performance. Applications include wireless infrastructure, storage networking, network access, military technology, and industrial automation. Tundra headquarters are located in Ottawa, Ontario, Canada. The Company also has a design center in South Portland, Maine, and sales offices in the U.K., across the U.S. and in Asia. Tundra sells its products worldwide through a network of direct sales personnel, independent distributors and manufacturers' representatives. Tundra employs about 200 employees worldwide. Visit Tundra at www.tundra.com.

Forward Looking Statement
This press release contains certain forward-looking statements, as that term is defined in the Private Securities Litigation Reform Act of 1995, including those relating to Ensemble. You can identify these statements by our use of the words “may,” “will, ” “should, ” “plans, ” “expects, ” “anticipates, ” “continue, ” “estimate, ” “project, ” “intend, ” and similar expressions. These forward-looking statements involve risks and uncertainties that could cause actual results to differ materially from those projected or anticipated. Such risks and uncertainties include, but are not limited to, general economic and business conditions, conditions in the telecommunications market, competition, changes in technology, delays in completing engineering and manufacturing programs, continued success in technological advances and delivering technological innovations, market acceptance of Ensemble and the Company’s other products, shortages in components, and production delays due to performance quality issues with outsourced components. These risks and uncertainties also include such additional risk factors as are discussed in the Company’s recent filings with the U.S. Securities and Exchange Commission, including its Annual Report on Form 10-K for the fiscal year ended June 30, 2003. The Company cautions readers not to place undue reliance upon any such forward-looking statements, which speak only as of the date made. The Company undertakes no obligation to update any forward-looking statement to reflect events or circumstances after the date on which such statement is made.

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Contacts: Kathy Donahue Inc.
Mercury Computer Systems,
978-967-1126

Stacey Diffin-Lafleur
Tundra Semiconductor Corporation
613-592-0859 ext. 1820

Tom Yates
Coltrin & Associates
212-221-1616

Barbara Kalkis
Maestro PR
408-996-9975

Product and company names mentioned may be trademarks and/or registered trademarks of their respective holders. TUNDRA is a registered trademark and Tsi500 is a trademark of Tundra Semiconductor Corporation (Canada, U.S. and U.K.). Other registered and unregistered trademarks are the property of their respective owners.