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For a concept search, you can enter phrases, sentences, or full paragraphs in English. For example, copy and paste the abstract of a patent application or paragraphs from an article.
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A method is described which allows applications to define signals that are not character-based for use with programmable communication subsystems, in digital communication systems.
English (United States)
This text was extracted from a PDF file.
This is the abbreviated version, containing approximately
92% of the total text.
Page 1 of 1
Enhanced Break Signalling On a Personal Computer
A method is described which allows applications to define signals that are not
character-based for use with programmable communication subsystems, in
digital communication systems.
Asynchronous communication is one of the most common forms of digital
communications in use today. Almost every host and PC supports this form of
communication. However, its use has been primarily interactive (in the form of
preprogrammed terminals) to hosts. With the advent of PCs, the use of
asynchronous communications has been dramatically increased (as evidenced
by the number of multimillion dollar software vendors, who specialize in
asynchronous communications). Due to the infancy of the computer age, no
general programming interface has been defined for such communications in
Generations and occurrences of BREAK signals on lines have been used to
digitally communicate between applications. However, BREAK has been
traditionally defined as "continuous, uninterrupted LOW signals for longer time
than a possibly configurable period." However, this concept can be generalized
to accommodate and define more than just one signal. The application
programming interface for implementing this concept is the basis for this method
and is called "Enhanced BREAK Signalling."
Applications can keep the line in a BREAK state for longer time than that
required for the traditional definition of the break signal as shown in Fig...