Accelerated Technology Announces Upgrade for Networking Software, Nucleus NET 5.2

MOBILE, Ala., July 13, 2004 - Accelerated Technology®, the Embedded Systems Division of Mentor Graphics Corporation (Nasdaq: MENT), today announced the Nucleus® NET 5.2 software, a major upgrade of the Nucleus networking protocol stack. This release of the Nucleus NET software will give developers a networking stack with advanced features including hardware checksum offloading, support for Internet Group Multicast Protocol version 3 (IGMP), dynamic removal of network interfaces and virtual Local Area Network (VLAN) support.

The new features are in addition to those protocols already supported by the Nucleus NET software including TCP, UDP, IP, ICMP, IGMP, ARP, RARP, DNS resolver, DHCP client, BOOTP client, RIP/RIP II and TFTP client.

Hardware checksum offloading has been provided for the Nucleus NET 5.2 software in order to increase the speed and performance of networked applications. In addition, the Nucleus NET 5.2 software now adheres to IGMPv3 support, the protocol governing the management of multicast groups in a TCP/IP network. This new protocol increases the Nucleus NET stack's interoperability with the latest network equipment on the market.

Other changes made to the Nucleus NET 5.2 software include the dynamic removal of network interfaces. This feature paves the way for networking developers to use hot-swappable network devices with the Nucleus NET protocol stack such as 802.11 (or Ethernet), PCMCIA card or CompactFlash cards and 802.11 (or Ethernet) over Universal Serial Bus (USB). Many new products are adding support for this type of removable media and the Nucleus NET 5.2 software opens the door for the Nucleus developers to enhance their products with these emerging technologies.

The Nucleus NET stack upgrade also offers VLAN support. Applications such as Voice over Internet Protocol (VoIP) that require quality of service (QoS) support from the network often need VLAN support with priority tagging. In the office setting, large corporations use VLAN for their local network to improve overall network performance. Additionally, customers that create network-enabled devices, e.g. a printer, to be used in this type of environment will need VLAN support in order for their device to function on the local network.

"The networking world is constantly changing to keep up with new technology and to meet market demands. Because of this, the Nucleus NET software has also evolved to meet this challenge. The Nucleus NET 5.2 software is the latest installment of our core networking support, adding new features that meet the demands of today's applications," said Robert Day, director of marketing, Embedded Systems Division, Mentor Graphics.

Pricing and Availability
The Nucleus embedded software is sold in source code format and without royalty fees. Licenses for the Nucleus NET begin at $14,495. For more information, please contact Accelerated Technology at 800-468-6853.

About Mentor Graphics
Mentor Graphics Corporation (Nasdaq: MENT) is a world leader in electronic hardware and software design solutions, providing products, consulting services and award-winning support for the world's most successful electronics and semiconductor companies. Established in 1981, the company reported revenues over the last 12 months of about $675 million and employs approximately 3,700 people worldwide. Corporate headquarters are located at 8005 S.W. Boeckman Road, Wilsonville, Oregon 97070-7777; Silicon Valley headquarters are located at 1001 Ridder Park Drive, San Jose, California 95131-2314. World Wide Web site: http://www.mentor.com/.

Accelerated Technology, Embedded Systems Division of Mentor Graphics Corporation, is located in Mobile, Alabama with sales offices and distributors worldwide. By providing embedded systems developers with a focus on service, well-documented source code and industry-leading non-royalty-based Real-Time Operating Systems (RTOS) software including kernels, middleware, prototyping software, development tools and modeling software, AT's suite of products shorten time-to-market and provide a complete solution for engineers. For more information, please visit www.acceleratedtechnology.com .

Mentor Graphics, Accelerated Technology and Nucleus are registered trademarks of Mentor Graphics Corporation. All other company or product names are the registered trademarks or trademarks of their respective owners.

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