MOUNTAIN VIEW, Calif., Jul 9, 2004 /PRNewswire-FirstCall via COMTEX/ — Synopsys, Inc.
(Nasdaq: SNPS) and Monolithic System Technology, Inc. (MoSys) (Nasdaq: MOSY)
today announced the settlement of their litigation relating to the termination
by Synopsys of the merger agreement dated February 23, 2004 between the
parties. Under the terms of their settlement agreement, Synopsys and MoSys
agreed to settle the merger termination lawsuit filed by MoSys without further
liability or payment to one another, and MoSys agreed to dismiss its lawsuit.

The complete settlement agreement will be included as an exhibit to the
Current Report on Form 8-K to be filed by each of Synopsys and MoSys with the
Securities and Exchange Commission.

About Synopsys

Synopsys, Inc. is the world leader in EDA software for semiconductor
design. The company delivers technology-leading semiconductor design and
verification platforms and IC manufacturing software products to the global
electronics market, enabling the development and production of complex
systems-on-chips (SoCs). Synopsys also provides intellectual property and
design services to simplify the design process and accelerate time-to-market
for its customers. Synopsys is headquartered in Mountain View, California, and
has more than 60 offices located throughout North America, Europe, Japan and
Asia. Visit Synopsys online at http://www.synopsys.com.

Synopsys is a registered trademark of Synopsys, Inc. All other trademarks
mentioned in this release are the intellectual property of their respective
owners.

SOURCE Synopsys, Inc.

INVESTORS, Jessica Kourakos of Synopsys, Inc., +1-650-584-1901;
or, EDITORIAL, Dushka Zapata of Edelman, +1-650-429-2726, for Synopsys, Inc.

http://www.synopsys.com