Systran Corp. announced it has expanded the number of interface boards that
connect computers to its real-time, fiber-optic, replicated shared-memory
network, SCRAMNet. Now, companies requiring true real-time (150 MBit/sec.)
network performance can add MULTIBUS- and Encore's SelBUS-based system
nodes. MULTIBUS-based computers, from companies such as Silicon Graphics,
Concurrent Computer Corp., and Intel; and SelBUS-based computers from
Encore Computer Corp. (formerly Gould CSD), can now be connected for
real-time applications ranging from aircraft simulation to telemetry. The
new boards bring the total number of SCRAMNet-supported backplane busses
to eight.

The SelBUS-based board, the SCRAMNet Model SE1000, is particularly useful
for telemetry applications, where Encore computers have a large installed
base and where real-time speeds are necessary for receiving and
transmitting radio data for control purposes. The SCRAMNet Model Ml 100,
based on MULTIBUS, allows systems integrators to connect Silicon Graphics
series 2000 and 3000, Concurrent's 5000 line and Intel 310 AP or 320
systems equipped with a 386 processor to SCRAMNet networks.

Said W. Lynn Trainor, president of Systran, "SCRAMNet's forte is
transferring data among different vendors' computers at the speed of
light. With the introduction of the SelBUS and MULTIBUS boards, we've
substantially increased the variety of networkable computers, furthering
SCRAMNet's position as a standard in the realm of real-time applications,
and allowing our customers to use whatever computer technology they need
in their high-end data transfer applications."

SCRAMNet Designed for Simplicity, Speed 

With SCRAMNet's replicated shared-memory design, all computer nodes on the
network are equipped with identical computer-addressable memories. Every
change to the replicated shared-memory at one node is immediately and
automatically replicated in all nodes on the network in microseconds,
causing all computers to appear to real-time applications as one large
virtual multi-processor. Featuring fiber-optic technology, a sophisticated
interrupt structure, data filtering and a programmable byte swapper, the
SCRAMNet network avoids the limitations of physical shared-memory
architecture and message-passing LANs to deliver true real-time speed,
predictable performance, positive system control and with no software
overhead.

SelBUS--An Efficient Link to SCRAMNet 

The Model SE1000 provides a transparent, efficient link between the
SCRAMNet network and SelBUS-based computer systems. Like all Systran
boards, it features the SCRAMNet simplicity, where all data is replicated
in SelBUS memory as it occurs, with no protocol conversions. Features
include:

 Economical single board design that plugs into any SelBUS D.I. slot.

 Efficient memory scheme that eliminates additional memory costs while
keeping SelBUS-resident caching devices current with network memory
updates.

 Powerful interrupt on memory update capabilities.

 Status postings for generating error conditions and for generating
externally accessible interrupt pulses per event.

 Flexible byte-swapping that uses two separate swapping matrices for
network transmissions and network receptions.

 Effective data-integrity control.

MULTIBUS Board Merges Reliability, Performance 

One of the most recent additions to the SCRAMNet network family, the Model
M1100 features total compliance with the MULTIBUS I standard, efficient
network writes, broad memory-mapping capabilities, and installation and
verification software. It merges the performance provided by SCRAMNet with
the proven reliability of MULTIBUS I-based systems for applications
ranging from process control to aircraft simulation.

Price and Availability 

Both the Model SE 1000 and the M1100 are available now, at prices per node
ranging from $6,900 to $12,900, depending on configuration.

An established research and development firm headquartered in Dayton, Ohio,
Systran Corp. specializes in simulation, artificial intelligence and
defense-related hardware/software research and development. The company's
SCRAMNet network is the leading real-time network, with hundreds of nodes
in use at aerospace, corporate and U.S. military installations. For more
information, contact Systran at 4126 Linden Ave., Dayton, OH 45432-3068.
Telephone: 1-800 252-5601.

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