Diamond Multimedia Adds New Software Titles to Its Award-winning SupraExpress 56 Modem Line.

VANCOUVER, Wash.--(BUSINESS WIRE)--April 27, 1999--

Diamond Multimedia Systems, Inc. (Nasdaq:DIMD), a leader in PC multimedia and Internet connectivity, today announced the addition of several new software titles to the CD-ROM that ships with its award-winning SupraExpress(TM) line of PC-based 56Kbps (kilobits per second) modems.

The new titles, with an estimated retail value of $49, include Surf Monkey(TM) from MediaLive, Inc., WebChaperone(TM) from RuleSpace, Inc. and CheckIt NetOptimizer from TouchStone Software Corporation (Nasdaq:TSSW).

"We are pleased to add these new software titles to extend the value proposition of our SupraExpress 56 modem line," said Jim Cady, president of Diamond Multimedia's Communications Division. "Consumers can enhance their Internet experience by using these popular software applications and enjoy the fast, dependable connections delivered by our SupraExpress modems."

MediaLive's Surf Monkey

Surf Monkey is a talking, animated Web browser and online service created exclusively for children ages 6 and up. Surf Monkey's free "Rocketship" browser offers children an entertaining and educational Internet experience by enabling them to surf the Web, exchange multimedia e-mail and enjoy comic chat rooms.

"Surf Monkey is sure to be a big hit with kids that surf with a SupraExpress 56 modem," said Andrew Neff, vice president of marketing and business development for MediaLive, Inc. "Diamond Multimedia continues to demonstrate its market leadership role by providing its customers with unique packages that offer added value."

RuleSpace's WebChaperone

WebChaperone is an advanced child-protection/parental-control software application that helps parents protect their children from mature content on the World Wide Web. With proprietary intelligent Content Recognition Technology (iCRT), WebChaperone checks every Web page as it is being downloaded and denies access to pages that are inappropriate. Parents can select different maturity levels (i.e. child, pre-teen, teenager) from minimum to maximum protection and there is no limit to the number of users.

"Diamond Multimedia's inclusion of WebChaperone with its SupraExpress 56 modems shows its commitment to providing parents with the most effective technology, combining the hottest modems with the best protection, for children to explore the Internet," said Adrian Russell-Falla, chairman and founder, RuleSpace, Inc.

TouchStone's CheckIt NetOptimizer

CheckIt NetOptimizer is an innovative software application designed to optimize and troubleshoot Internet connections for maximum possible performance. The software also acts as a diagnostic tool to quickly and easily correct modem problems, such as data initialization, port problems as well as the resolution of IRQ conflicts. In addition, CheckIt NetOptimizer provides the ability to monitor both download and connection speeds and provides an alert when these connections are at below average speeds.

"The pairing of CheckIt NetOptimizer with Diamond Multimedia's SupraExpress 56 modems provides consumers with an outstanding solution for maximizing the overall speed and performance of their Internet experience, including activities such as Internet surfing, downloading, gaming and chatting," said Pierre A. Narath, president and CEO of TouchStone Software Corporation.

SupraExpress 56 Series

Priced between $79.95 and $99.95, the Diamond SupraExpress 56 modem line consists of the following models, each of which include the family software bundle:

SupraExpress 56 Modem Description Estimated

Retail Price

SupraExpress 56i Sp (PC) Internal 56K V.90 modem $79.95

SupraExpress 56e (PC) External 56K V.90 modem $99.95

About Diamond Multimedia

Diamond Multimedia is a leader in PC multimedia and Internet connectivity, providing advanced products that enable desktop computer users to create, access and experience compelling new media content from their PC's and through the Internet. Products include the Rio series of Internet audio appliances, the Stealth and Viper(R) series of video accelerators, the Monster series of 3D gaming accelerators, the Fire series of professional graphics accelerators, the Supra(R) series of modems, and the HomeFree line of home networking products. Diamond's common stock is traded on the NASDAQ under the symbol DIMD, and its web site address is http://www.diamondmm.com. The Company's Internet music portal site is at http://www.RioPort.com.

How to Contact Diamond Multimedia

There are many ways to reach Diamond for sales support, technical assistance, driver updates and general information: Internet Web Sites: http://www.diamondmm.com and http://www.RioPort.com

Diamond Multimedia's Headquarters and Multimedia Division:

408/325-7000; Fax: [phone] Communications Division (Supra brand modems) Main Phone Number:

360/604-1400; Fax: [phone] European Division (Germany): [phone]; (UK): [phone];

(France) [phone] Korean Office (Seoul): [phone]; Fax: [phone] Japanese Office (Tokyo): [phone]; Fax: [phone] ASEAN Office (Singapore): [phone]; Fax: [phone] Hong Kong Office: [phone]; Fax: [phone] Australian Office (Sydney): [phone]; Fax [phone] Latin America Office (Miami): 305/593-8777; Fax: [phone] Mexico Office (Guadalajara):523-110-1144; Fax: [phone] Product Support (Voice), United States: 541/967-2450; Europe (Germany)

[phone]; Europe (UK) [phone]; Europe (France) [phone]; TDD/TTY

Support 541-967-2451 Product Support (Fax), United States: 541/967-2401; Europe (Germany)

[phone]; Europe (UK): [phone]; (France) [phone] Pre-sales Information: 800/468-5846 24-Hour Fax-On-Demand Service: 800/380-0030 Investor Relations: 408/325-7476; 888/474-3463 (U.S. and Canada) FTP site: ftp.diamondmm.com BBS: Europe (Germany) BBS at [phone] (to 28.8 Kbps) or

[phone] (ISDN); Europe (UK) at [phone] (to 33.6

Kbps)

HomeFree, Monster 3D, Rio, Shotgun, SpeedStar and SupraSonic are either trademarks or registered trademarks of Diamond Multimedia Systems, Inc. Monster(TM) is a registered trademark of Monster Cable. Viper(R) is a registered trademark of Directed Electronics, Inc., Used under License. All other trademarks referenced are the service mark, trademark or registered trademark of their respective manufacturers. This announcement relates to products whose introductions are in North America. The product name, contents, prices and availability may differ elsewhere in the world according to local factors and requirements.

Except for historical information contained herein, the matters set forth in this press release, such as statements relating to the Company's ability to successfully exploit technological and market developments, the timing and success of new product introductions by the Company and its competitors, and the Company's ability to invest in new technologies and to enhance its existing systems are forward-looking statements that are subject to risks and uncertainties, including the impact of competitive products and pricing and alternative technological advances, the timely and successful development and market acceptance of new products and upgrades to existing products, and other risks as detailed from time to time in Diamond Multimedia's SEC filings, including its most recent Forms 10-K and 10-Q.