4. OPERATION
4.1 Overview
The GT200 Network is a shared-memory system. Every computer on the network has a
local copy of all global data, which is passed to all the network computers anytime a
write occurs. The network protocol is implemented in the GT200 hardware and therefore
no software overhead is required to retrieve this information from the network.
The protocol is transparent to the computer. This frees computer processor time for
application algorithm execution and other real-time tasks. Since any computer on the
network has access to data in the shared memory, any computer can read or modify the
shared data and thereby communicate with the other computers on the network.
The GT200 software is designed to help facilitate application software development. The
software consists of a device driver, an API library, and a set of utility applications. See
the GT200 (SCRAMNet GT) API Guide for more information.
4.2 Network Hardware
4.2.1 Network Paradigm
The GT200 Network is a connectionless-broadcast shared-memory network. Each host
processor on the network has access to its own local copy of shared memory that is
updated over a high-speed, serial-ring network. The network is optimized for the high-
speed transfer of data among multiple, real-time computers that are all solving portions of
the same real-time problem
Copyright 2005 4-1 GT200 Hardware Reference
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