ADAPTEC SHIPS ITS AHA-1542CP BUS MASTERING ISA-TO-FAST SCSI HOST ADAPTER IN
A RETAIL KIT

Adaptec's New SCSI Master Kit Combines SCSI Performance and Compatibility
With Complete Plug and Play Support

MILPITAS, Calif. -- June 19, 1995 -- Adaptec (NASDAQ:ADPT), an industry
leader in input/output (I/O) technology, today announced that it is
shipping its newest host adapter, the AHA-1542CP, in a retail kit -- the
SCSI Master kit. The AHA-1542CP is the industry's first ISA-to-Small
Computer System Interface (SCSI) host adapter with bus mastering that is
fully Plug and Play (PnP)-compliant.

Adaptec's AHA-1542CP SCSI host adapter unleashes the true multitasking
capability found in operating systems such as Microsoft Windows 95,
enabling higher overall system performance, making the user more
productive.

Multitasking is an inherent characteristic of SCSI technology. The
AHA-1542CP SCSI host adapter, therefore, allows users to run more than one
application that requires I/O, such as installing CD-ROM-based software,
downloading a file, receiving a fax and editing a document all at the same
time. This benefits applications such as desktop publishing, document
imaging and multimedia authoring which manipulate large graphics, audio
and video data files. The AHA-1542CP takes performance one step further by
providing a bus mastering architecture for optimal multitasking
performance.

Bus mastering Direct Memory Access (DMA) reduces the burden on the central
processing unit (CPU), freeing up processing power and leaving the CPU
available to handle other tasks. The result is greater overall
productivity on the desktop.

The AHA-1542CP, as with all products in the industry-standard AHA-1540
family, offers unmatched compatibility with major operating systems,
third-party software and peripheral devices.

"Microsoft is pleased that Adaptec supports Windows 95 and its Plug and
Play and multitasking features," said Carl Stork, director of Windows
Hardware Programs at Microsoft Corp. "Because SCSI is a multitasking
interface, it is an ideal solution for Windows 95 users. Windows 95
combined with Adaptec's new SCSI Master kit will help improve connectivity
and compatibility, making the users experience even easier."

"Adaptec's AHA-1542 family of adapters has continued to evolve to offer end
users superior compatibility and ease of use," said S. Sundaresh, vice
president and general manager of Adaptec's Personal I/O Business Unit.
"The new SCSI Master kit provides multitasking SCSI performance while
increasing the simplicity of installation through Plug and Play."

Installation and Configuration Made Easy With Plug and Play

Adaptec's new AHA-1542CP adapter is fully compliant with both the Industry
Standard Architecture (ISA) and SCSI PnP specifications.

ISA Plug and Play manages installation of the host adapter itself onto the
ISA bus. ISA PnP automatically assigns system resources such as the
interrupt request line, DMA channel and port address. This relieves users
from having to make potentially difficult resource allocation decisions
when installing a board.

Under the SCSI PnP protocol, the AHA-1542CP adapter automatically locates
all connected SCSI devices and resolves SCSI resource conflicts in
seconds. SCSI PnP manages these issues during the boot-up cycle by
assigning IDs and determining termination requirements without user
intervention.

Adaptec's SCSISelect optimization software enhances Plug and Play ease of
use by eliminating many of the difficulties end users encounter during
configuration. SCSISelect software allows users to quickly modify their
host adapter's configuration settings from the keyboard to maximize device
performance.

Adaptec EZ-SCSI software supports most popular SCSI peripherals and
includes the following I/O applications: 32-Bit Disk Access, Advanced
Power Management, Graphical Disk Partitioning, SCSI Tape Backup, SCSI
Benchmark, CD Player, Photo CD Viewer, SCSITutor and SCSI Scanner.

Pricing and Availability

The SCSI Master kit includes the AHA-1542CP host adapter, SCSISelect
optimization software, Adaptec EZ-SCSI software and all necessary
documentation. The new SCSI Master Kit is available now through
distributors at a manufacturer's suggested retail price of $339.

Adaptec, Inc., designs, manufactures and markets IOware solutions to
eliminate performance bottlenecks between microcomputers, networks, and
peripherals. Solutions range from simple connectivity products for
single-user and small-office desktops, to intelligent subsystem,
high-performance SCSI, RAID and ATM products for enterprise-wide computing
and networked environments. Adaptec I/O solutions are incorporated into
the products of virtually all the major computer and peripheral
manufacturers around the world.

Founded in 1981 and headquartered in Milpitas, Calif., Adaptec is a
recognized market leader in high-performance I/O technology. Adaptec
currently employs approximately 1,700 people, and with its global
distribution network, serves customers worldwide. Adaptec's World Wide Web
home page address is http://www.adaptec.com.

Adaptec
691 South Milpitas, Blvd
Milpitas, CA 95035
408-945-8600,  fax 408-262-2533

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