USPTO Awards ARC International Key Patent On Configurable Processor Technology

Patent Rights Granted Based on the Company's Pioneering Work in The Field of SoC Configurability and Extendibility

ELSTREE, United Kingdom, March 1, 2005 – ARC International (LSE: ARK), the world leader in low-power, high performance 32-bit configurable CPU/DSP processor cores and application subsystems, today announced that the United States Patent and Trademark Office (USPTO) has awarded the company a fundamental patent relating to configurable processor technology. U.S. Patent Number 6,862,563, entitled "Method and Apparatus for Managing the Configuration and Functionality of a Semiconductor Design," details processes and systems used to generate a description language model of a processor core using libraries containing prototype and extension logic descriptions, as well as user inputs relating to the desired core configuration and extension features.

One practical implementation of this technology is ARC International's proprietary ARChitect™ processor configurator. Used by all of ARC's processor licensees, ARChitect is a Java-based design tool that greatly simplifies the core design process, and enables SoC designers to create chips that precisely meet application requirements of high-volume markets. Using the ARChitect configurator, SoC designers can easily lower the gate count and power consumption of processors by automatically configuring, customizing, extending and testing them in a software environment that resides on the user's desktop.

"This USPTO action underscores ARC's position as the industry leader in configurable technology," said Carl Schlachte, ARC's president and CEO. "Configurability is bringing about a revolution in SoC design. The patent award strengthens ARC's efforts to broadly market the benefits of configurable technology to the semiconductor industry. Already millions of ARC-Based chips are shipping to market in high-volume applications. As the acknowledged pioneer of configurable SoC technology, ARC can now bring the benefits of configurability to more markets and applications."

About the ARChitect™ Processor Configurator
The ARChitect configurator provides a comprehensive set of tools and resources to easily customize an ARC core and integrate peripherals and other IP using a drag-and-drop GUI. The ARChitect configurator also provides guidelines for final silicon area and memory requirements. Included is the ability to configure features around the core such as type and size of caches, interrupts, DSP subsystem, timers and debug components, as well as features within the core such as type and size of core registers, address widths and instruction set options. Performance and die size tradeoffs are quickly accomplished, resulting in an optimized solution. Invariably the ARC core will be smaller and lower power than non-ARC cores with fixed configurations.

About ARC International plc

ARC International is the world leader in low-power, high-performance 32-bit configurable CPU/DSP processor cores, subsystems, real-time operating systems and development tools for embedded system design. ARC's configurable and extendible cores assist customers in the development of next generation digital media, consumer and communications devices, resulting in lower cost, higher performance SoC products.

ARC International maintains a worldwide presence with corporate offices in San Jose, California, USA and Elstree, UK. The company has research and development offices located in England and the United States. For more information please visit the ARC website at: www.ARC.com. ARC International is listed on the London Stock Exchange as ARC International plc (LSE: ARK).

ARC, the ARC logo and ARC-Based are trademarks or registered trademarks of ARC International. All other brands or product names contained herein are the property of their respective owners. This press release may contain certain "forward-looking statements" that involve risks and uncertainties. For factors that could cause actual results to differ, visit the company's website as well as the listing particulars filed with the United Kingdom Listing Authority and the Registrar of Companies in England and Wales.