Diamond Multimedia joins with Pacific Bell Internet to promote SupraExpress modems.

VANCOUVER, Wash.--(BUSINESS WIRE)--June 30, 1997--

PBI Customers Can Now Connect with Faster Modems From Diamond

Diamond Multimedia Systems, Inc., (Nasdaq: DIMD), a leader in Internet multimedia acceleration, today announced a joint promotion with Pacific Bell Internet (PBI).

PBI subscribers can purchase a Diamond SupraExpress 336 modem and receive a special money-back mail-in rebate from Diamond. The special offer is available on both internal and external modems for Windows-based PCs, as well as external modems for Macintosh.

PBI is encouraging their customers to take advantage of this special modem offer and is contacting them by email. Additional details of the promotion are available on the PBI web site at http://www.public.pacbell.net, or by calling 1-800-708-4638. The modem upgrade program is one of several other initiatives planned by Pacific Bell Internet and Diamond Multimedia to encourage more widespread use of Internet connectivity. "Diamond's partnership with PBI allows users to upgrade to faster modems and immediately realize the benefits of faster Internet access, reduced access times and fees," said Roland Rice, Director of North American Sales for Diamond Multimedia. "Whether you're cruising the Internet, transferring large files, or broadcasting a fax across the country, the SupraExpress is an ideal solution for the home or office."

Diamond SupraExpress 336 Modems

SupraExpress 336 modems meet the demands of cost-conscious users. These reliable modems offer transmission speeds up to 33.6 Kbps and are compatible with Windows 3.1 or 3.11, as well as Windows 95. The SupraExpress 336i (internal), SupraExpress 336i Sp (internal with speakerphone) and SupraExpress 336e (external for PC or Mac) are certified by Microsoft Compatibility Labs for Windows 95 and have estimated street prices ranging from $69.95 to $119.95.

The entire line of SupraExpress 336 modems includes top-rated fax, data and Internet software and is backed by a five-year limited warranty.

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 series of media accelerators, the Monster series of entertainment 3D and sound accelerators, the Fire series of professional 3D and SCSI accelerators, and the Supra(r) series of modems. Diamond also markets DVD and video phone kits. Diamond's common stock is traded on the Nasdaq Stock Market under the symbol DIMD, and its web site address is www.diamondmm.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 Site: http://www.diamondmm.com

-- Diamond Multimedia's Headquarters and Audio-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), Audio-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; TDD/TTY Support 541-967-2451

-- Product Support (Fax), Audio-Visual Systems: 408-325-7171;

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

Europe (UK): [phone]; (France) [phone]

-- Pre-sales Information, Audio-Visual Systems: 1-800-468-5846;

Communications: 1-800-727-8772

-- Investor Relations: 888-474-3463

-- 24-Hour Fax-On-Demand Service, Audio-Visual Systems:

1-800-380-0030; Communications: 541-967-0072

-- FTP sites: ftp.diamondmm.com; or Supra: ftp.supra.com

-- BBS for Audio-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] (to 33.6 Kbps)

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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.

CONTACT: Diamond Multimedia

Communications Division

Tamara Hanna/Sarah Rades

360/604-1469; 604-1515

[e-mail]; [e-mail]