Diamond Multimedia now ships enhanced Windows NT drivers for Supra NetCommander ISDN adapters.

VANCOUVER, Wash.--(BUSINESS WIRE)--Feb. 18, 1997--

- Supra NetCommander ISDN Now Supports Windows NT 4.0 Operating

System, Estimated Retail Price Reduced To $249.95 -

Diamond Multimedia Systems, Inc. (Nasdaq: DIMD), a leader in the Internet multimedia market, today announced a significant feature enhancement for its award-winning Supra NetCommander(TM) ISDN adapters and a new, more aggressive estimated retail price (ERP) of $249.95.

The driver software, version 4.00, now provides support for Microsoft's Windows NT 4.0 in addition to the Windows 95 operating system. Current Supra NetCommander ISDN customers can download the new driver software free of charge directly from the modem updates section of Diamond Multimedia's Web site (http://www.diamondmm.com).

As Windows NT and Pentium Pro-based workstations continue to gain momentum, this announcement underscores Diamond Multimedia's commitment to provide support for leading operating systems. "The Supra NetCommander ISDN has proven that ISDN can be both easy to install and provide the power necessary for high-speed communications," said Jeff Orr, ISDN product line manager for Diamond Multimedia's Communication Division. "Whether downloading rich multimedia content from the Web, or providing dial-up access for the telecommuter, users can select a Windows operating system and be assured that Supra NetCommander ISDN will add value."

The Supra Netcommander ISDN now joins other products recently announced by Diamond multimedia to support Windows NT 4.0 "PC workstations," including the Fire GL1000 2D/3D and Open GL graphics accelerator, the FirePort 40 Ultra-wide SCSI host adapter and the Stealth 3D 3000 business graphics accelerator.

Diamond's Supra NetCommander ISDN

Awarded PC Magazine's coveted "Editors' Choice" award for the internal ISDN adapter category (for Windows 95), the Supra NetCommander ISDN integrates a 128,000 bps, plug and play ISDN modem with an analog port capable of ringing up to three telephones, fax machines or modems. Diamond's AutoISDN(TM) makes it easy to configure and monitor the Supra NetCommander ISDN's powerful features including device diagnostics and connection logging. In addition, the Supra Netcommander ISDN supports Microsoft's Telephony Application Programming Interface (TAPI) enabling a broad range of exciting applications for users of both telephones and computers.

In the February 4, 1997 issue of PC Magazine, the Supra NetCommander ISDN was noted as a product that "hits all the hot buttons" with "Windows 95 Plug and Play, a full-featured analog port, excellent performance, and innovative software -- all at a show-stopping low list price of $299." Effective immediately, Diamond Multimedia has reduced the ERP of the Supra NetCommander ISDN to $249.95.

Additionally, Diamond Multimedia introduced its ISDN Now! program (http://www.isdnnow.com) to simplify the ordering process of ISDN-related products and services. Designed for resellers and end-users, Diamond's ISDN Now! program enables one-stop, on-line ordering of ISDN and Internet provisioning services, as well as Diamond Multimedia's award-winning Supra NetCommander ISDN modem.

Diamond Multimedia

Diamond Multimedia is driving the Internet multimedia market by providing interactivity and connectivity solutions for home, business and professional desktop computer users, enabling them to create, access and experience compelling new media content from their desktops and through the Internet. Diamond accelerates multimedia from the Internet to the hard drive with products that include the Stealth and Monster series of media accelerators, the Fire series of professional 3D graphics and SCSI I/O data accelerators, and the Supra(R) series of modems and ISDN adapters. Diamond also markets multimedia and video phone upgrade kits.

Headquartered in San Jose, CA, Diamond has sales, marketing and technical support facilities in Vancouver (Wash.), Singapore, Hong Kong, Seoul, Tokyo, Starnberg (Germany), Paris and Winnersh (U.K.). Diamond's products are sold through local and international distributors as well as directly to major retailers, VARs and OEMs worldwide. Diamond's common stock is traded on the Nasdaq Stock Market under the symbol DIMD.

How to Contact Diamond Multimedia

There are many ways to reach Diamond for sales support, technical assistance, driver updates and general information:

-- Internet Web Site: http://www.diamondmm.com -- Diamond Multimedia's Headquarters and Visual Systems 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] -- Support Information Line for Communications: 1-800-774-4965 -- Product Support (Voice), Visual Systems: 408/325-7100;

Communications: 541/967-2450; Europe (Germany) [phone];

Europe (UK) [phone]; ISDN Support Center 408/325-7110;

Fire GL Support Center 408/325-7120 -- Product Support (Fax), Visual Systems: 408/325-7171;

Communications: 541/967-2401; Europe (Germany) [phone];

Europe (UK): [phone]; (France) [phone] -- Pre-sales Information, Visual Systems: 1-800-468-5846;

Communications: 1-800-727-8772 -- Investor Relations: 408/325-7476; Fax-On-Demand: 1-800-346-3329;

International Fax-On-Demand: 201/433-1778 -- 24-Hour Fax-On-Demand Service, Visual Systems: 1-800-380-0030;

Communications: 541/967-0072 -- FTP sites: ftp.diamondmm.com; or Supra: ftp.supra.com -- BBS for Visual Systems 408/325-7080 (to 14.4 Kbps) or 408/325-7175

(to 28.8 Kbps) or 408/383-0551 (ISDN);

Communications BBS: 541/967-2444; Europe (Germany) BBS at

[phone] (to 28.8 Kbps) or [phone] (ISDN);

Europe (UK) at [phone]

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Monster 3D and Supra are either trademarks or registered trademarks of Diamond Multimedia Systems, Inc. All other trademarks referenced are the service mark, trademark or registered trademark of their respective manufacturers. This announcement relates to products whose launch are in the United States of America. The product names 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.

CONTACT: Diamond Multimedia, Communications Division

Tamara Hanna, 360/604-1469 or [e-mail]

Sarah Rades, 360/604-1515 or [e-mail]