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SECTION 3
3.1
GENERAL CONCEPTS
COMPUTER
North Star HSIO-4
IMPLEMENTING HSIO-4 FEATURES
This section provides an overview of serial
data communication between computers and other
electronic devices; it also provides detailed
instructions on how to use the HSIO-4 to
establish communication links between the
computer and a variety of periperal devices.
As supplied, the HSIO-4 is ready for immediate
connection to four asynchronous RS-232
terminals or printers. Connection to most
asynchronous terminals and printers usually
requires no configuration changes to the
HSIO-4. Reading through the discussion that
follows can help you to determine what, if
any, changes are required by the particular
hardware and software you are using. Once you
have identified the needed modifications, you
should consult the appropriate subsection for
specific, detailed instructions.
In order to transmit data between a computer
and another electronic device, a communication
link must be established. Such a communication
link is usually comprised of a cable with a
connecting plug at each end. One plug is
connected to an Input/Output (I/O) port in the
computer; the other is connected to an I/O
port in the electronic device.
TRANSM ITTER
I/O PORT
RECEIVER
Figure 3-1
14
RECEIVER
I/O PORT
TRANSM ITTER
User/Technical Manual
DEVICE
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