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Today's increasing abundance of different types of computer terminals(1)
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(1)See attached list.
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bodes well for the satisfaction of the diverse needs and
desires of computer terminal users.(2)
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(2)Footnote...
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Before any new terminal can be connected
to a computer system,
however,
an appropriate interface must exist.\"xxx
This interface, inevitably involving both system hardware
and software,
must cope with the terminal's
speed, character set, line discipline, special features,
lack of features, and other idiosyncrasies.(3)
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(3)See reference (3) for a more complete description of terminal
differences.
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In many cases, the physical association of such an
interface with a terminal is dynamic;
most general-purpose time-sharing systems are accessed
via switched telephone lines.
Although dedicating certain access lines
to each terminal type is the simplest approach,
economy dictates that as many terminal types as possible
be served by each group of dedicated lines.
The greatest economy occurs when all terminals
can use the same group of lines.
If different terminal types are to use the same
access lines, it is necessary for the system to be able to identify
the terminal type.
This paper addresses the terminal-type identification
problem.
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TERMINAL PROPERTIES
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While it is the differences between types that brings about
the need for identification,
it is often these differences that permit identification.
The properties and abilities of terminals may be classified
and examined for their effect on the necessity for and the possibility of
type indentification.
The concern here is with typewriter-like terminals
employing asynchronous character communications.
The first properties to be enumerated are fundamental
ones;
i. e, properties that cannot be ignored when
communicating with the terminal.
Character code and format.
In addition to the character - bit-pattern
relationship, this includes(end)