ARC International and Green Hills Software Announce Enhanced MULTI Development Environment for Configurable ARC Processors

Optimized Compiler and Debug Software for ARC Processor Core Families Lower Development Times and Speed Time-to-Market

TOKYO, March 31, 2005 -- ARC International (LSE: ARK) the leader in configurable processor technology, and Green Hills Software, Inc., the technology leader in embedded software development tools and real-time operating systems, today announced the availability of enhanced versions of Green Hills Software's MULTIR Integrated Development Environment (IDE) for the ARC? 600 and 700 families of configurable processors.

Green Hills Software's enhanced MULTI IDE provides improved hardware breakpoint support for more efficient debug on ARC's cores, a new X/Y memory viewer that provides access to all the ARC architecture's X/Y memory banks through MULTI's memview, and an updated connection editor for the Green Hills ARCserv software simulator. ARC's recently released MetaWareR Toolkit 7.1 is fully supported, as is support for ARC's Cycle Accurate Simulator (CAS), which enables software engineers to easily debug and profile their code without having to connect to target hardware.

"Our expanding Green Hills Software relationship continues to provide engineers using ARC's patented configurable processor technology with one of the most comprehensive tool suites available on the market today," said Derek Meyer, vice president of marketing at ARC. "The newly optimized MULTI integrated design environment will help our customers to more easily design their ARC-Based chips using tools and platforms that have been pre-verified and tested by both ARC and Green Hills Software."

"Green Hills Software has developed our ARC toolkit to meet the needs of a growing number of customers using ARC's patented configurable technology," said Craig Franklin, vice president of advanced products at Green Hills Software. "With this introduction, we took the most potent development tools available today and put them into the hands of engineers designing with ARC cores. This solution has been adopted by customers resulting in optimized consumer products."

ARC 600 and ARC 700 Core Families

The ARC 600 core family offers a variety of CPU and DSP cores that deliver high performance in a small silicon area with minimal power consumption. The ARC 700 core family features the smallest 32-bit 400 MHz processor available today, and provides support for complex applications with an MMU and processing modes that enable feature-rich and secure operating systems. Both the ARC 600 and ARC 700 core families are DSP-enhanced and eliminate the need for additional signal processing engines.

MULTI Integrated Development Environment

The MULTI IDE provides a complete, tightly integrated set of tools for the rapid development, debugging and optimization of embedded software. The MULTI IDE is tightly integrated with ARC's MetaWare C/C++ compiler and instruction set simulators, and supports target connections using Green Hills Software's Green Hills or Slingshot JTAG processor probes or the MetaWare parallel port interface.

Availability

The Green Hills MULTI integrated development environment optimized for the ARC 600 and 700 core families is available for licensing from Green Hills Software.

About Green Hills Software

Founded in 1982, Green Hills Software, Inc. is the technology leader for real-time operating systems and software development tools for 32- and 64-bit embedded systems. Our royalty-free INTEGRITY RTOS, velOSity microkernel, compilers, MULTI and AdaMULTI Integrated Development Environments and TimeMachine debugger, offer a complete development solution that addresses both deeply embedded and high-reliability applications. Green Hills Software is headquartered in Santa Barbara, CA, with European headquarters in the United Kingdom. Visit Green Hills Software on the web at www.ghs.com.

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).

Green Hills Software, the Green Hills logo, MULTI, INTEGRITY, velOSity, AdaMULTI, and TimeMachine, are trademarks or registered trademarks of Green Hills Software, Inc. in the U.S. and/or internationally. All other trademarks are the property of their respective owners.

ARC, the ARC logo, MetaWare 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.