8/ UsingtheRS-232-C Interface
Whatis an Interface?
It's
a generalized means
of
communication between your
TRS-80
and some external
device, providing the necessary conventions regarding data-identification,
transmission rates, send-receive sequences, error-checking techniques, etc.
However, an Interface does
notprovide the programming necessary to
use
any
particularTRS-8o/ external device system.
For
example, having the Interface installed does not automatically enable you to
send
BASIC
programs from one
TRS-80
to another; to output to a line printervia the
Interface; etc. Such applications
require'
'driverprograms" which must be
custom-designedfor the equipmentyou intend to use.
The Radio Shack
RS-232-C
Interface is designed to meetthe
EIA
standards.
However, we cannotguarantee that it will work with all so-called"
RS-
232-C
compatible" devices. Nor do wecommitourselves to provide engineering and
programming support for such applications,
or
otherspecial custom-use situations.
We
do, however, guaranteethatourInterface will function correctly with all our
own
RS-232-C
equipment.
The
term
RS-232-C
refers to a specific
EIA
(Electronics Industries Association)
standardwhich defines a widely accepted method for interfacing data terminal
equipmentwith data communicationsequipment. The
RS-232-C
Interface is by far
the most universally used standard for interfacing data processing equipment. Most
video terminals, modems, card readers, line printers, mini-microcomputers,
etc.,
utilize the
RS-232-C
standard for data interchange between devices.
Adding the
RS-232-C
to yourModel III
TRS-80
opens up a whole new world
of
compatibility.
The
Computercan then
be
programmed to communicatewith a
serial printer, telephone modem, serial display terminal
~
almost any
RS
232-C
device.
Note:
The
following information applies only
if
your Model III
TRS-80
is equipped
with the
RS-232-C
Interface.
8/1
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