FOR IMMEDIATE RELEASE

RADISYS CORPORATION LENDS $250,000 TO MICROWARE

Hillsboro, OR, August 7, 2001 - RadiSys Corporation (Nasdaq: RSYS) today
announced that it has agreed to lend $250,000 to Microware Systems Corporation
to allow Microware to meet its payroll obligations pending the completion of the
offer by Drake Merger Sub, Inc., a wholly owned subsidiary of RadiSys, to
purchase all of the outstanding shares of Microware's common stock for a
purchase price of $0.68 per share, net to the seller in cash. Microware granted
RadiSys a security interest in all of its personal property assets to secure the
loan.

The expiration date of the offer is 5:00 p.m., New York City time, on Friday,
August 10, 2001. Under the terms of the agreement and plan of merger dated as of
June 29, 2001 among RadiSys, Drake Merger Sub and Microware, Drake Merger Sub is
permitted to extend the offer until the conditions to its purchase of tendered
shares are satisfied or waived. RadiSys expects to complete its acquisition of
Microware as soon as practicable after the expiration of the tender offer,
assuming the requisite number of shares of Microware common stock are tendered
and other closing conditions are satisfied or waived.

RadiSys is a leading provider of building blocks enabling next-generation
Internet and communications systems. The building blocks provided to
telecommunications equipment manufacturers include Intel-architecture embedded
computers, network processors, DSP modules and algorithms, network interfaces
and protocols, high-availability switch-fabric system platforms, and
SS7/signaling blades and gateways. RadiSys' highly differentiated position in
the market is a result of its focus on Intel-based technology, its broad array
of building-block technology, its tight "virtual division" relationships with
its customers, and its use of intellectual property to generate "perfect fit"
solutions for its customers.

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RadiSys is a registered trademark. All other products are trademarks or
registered trademarks of their respective companies.

To obtain copies of this press release and other RadiSys material please visit
our web-site at www.radisys.com or contact investor relations at
investor.relations@radisys.com or call the RadiSys Investor Line at
1-503-615-RSYS.

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