SUNNYVALE, Calif., Aug. 25 /PRNewswire-FirstCall/ — MoSys, Inc.,
(Nasdaq: MOSY), a leading provider of high-density system-on-ship (SoC) memory
and analog/mixed-signal intellectual property (IP), today announced the
appointment of Dave DeMaria as its Vice President of Business Operations. Mr.
DeMaria is a successful executive who brings over 25 years of experience in
the electronics industry to MoSys.

Prior to MoSys, Mr. DeMaria was CEO of Optimal Corporation, and electronic
design automation (EDA) company, which he helped grow and merge with Apache
Design Solutions, where he served as a senior vice president. Previously, he
held a number of executive positions in leading product lifecycle management
(PLM) and EDA companies. He spent eight years at Cadence Design Systems, where
he served as executive vice president of the Systems business unit and as
senior vice president of worldwide marketing and strategy.

“I am pleased to welcome Dave to the MoSys executive team,” stated Len
Perham, President and CEO of MoSys. “Dave joins MoSys with extensive
experience in the electronics industry and a very successful track record of
helping to grow companies.”

As an inducement material to Mr. DeMaria’s employment, in accordance with
NASDAQ Stock Market Marketplace Rule 4350(i)(l)(A)(iv), the Company has
granted him a stock option to purchase 275,000 shares of common stock at an
exercise price of $4.57 per share, which equals the closing price of a share
of MoSys common stock on the NASDAQ Global Market on August 18, 2008.

About MoSys, Inc.

Founded in 1991, MoSys (Nasdaq: MOSY), develops, markets and licenses
innovative embedded memory and analog/mixed-signal intellectual property (IP)
technologies for advanced SoCs used in a variety of home entertainment, mobile
consumer, networking and storage applications. MoSys’ patented 1T-SRAM and
1T-FLASH technologies offer a combination of high density, low power
consumption, high speed and low cost unmatched by other available memory
technologies. MoSys’ advanced analog/mixed-signal technologies include highly
integrated Blu-ray DVD, Gibabit Ethernet, Serial ATA, and a range of high
speed phase lock loop and analog-to-digital converter IP. MoSys’ embedded
memory IP has been included in more than 160 million devices demonstrating
silicon-proven manufacturability in a wide range of processes and
applications. MoSys is headquartered at 755 N. Mathilda Avenue, Sunnyvale,
California 94085. More information is available on MoSys’ website at
http://www.mosys.com.

MoSys and 1T-SRAM are registered trademarks of MoSys, Inc. 1T-FLASH(TM) is
a trademark of MoSys, Inc.

SOURCE MoSys, Inc.

CONTACT:
Jim Sullivan,
CFO of MoSys, Inc.,
+1-408-731-1800,
jsullivan@mosys.com;
or
Beverly Twing,
Sr. Acct. Manager
of Shelton Group,
Investor Relations,
+1-972-239-5119, ext. 126,
btwing@sheltongroup.com,
for
MoSys, Inc.

Web site: http://www.mosys.com