Patent
1989-03-29
1993-03-23
Cosimano, Edward R.
395144, 395145, 395147, 395148, G06F 1520
Patent
active
051971224
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
This invention relates to a data processing system. More particularly this invention relates to a data processing system which comprises a large general-purpose computer having data bases (D/B's) connected thereto, small computers functioning as a terminal device, and medial relaying computers connecting the small computers to the large computer.
This invention relates specifically to a data processing system which automatically converts numerical data introduced therein in specific units into data in other units and handles these data as one set of data.
This invention relates further to a method and apparatus for editing by the use of the data processing system, particularly to a method and apparatus for editing which is capable of quickly and easily accomplishing the editing of handling manuals on automobiles and electric appliances and books, magazines, and newspapers in general (hereinafter referred to simply as "books").
BACKGROUND ART
In a data processing system which comprises a general-purpose computer provided with D/B's and small computers (terminal devices) connected to the general-purpose computer, the terminal devices are used for the traffic of input and output data and the general-purpose computer performs a prescribed processing by using the input data and the data registered in the D/B's and, from the data obtained as the result of the processing, selects only pertinent data and causes them to be registered in the D/B's.
In the data processing system constructed as described above, the general-purpose computer is required to control the D/B's and, at the same time, carried out the data processing. When the general-purpose computer is provided with many terminal devices, therefore, heavy traffic of input and output data through the terminal devices has the possibility of causing temporary congestion of load on the general-purpose computer and consequent impairment of the computer's capacity for data processing.
In recent years, the work of editing a book has come to be carried out by the use of a data processing system which comprises a host computer provided with D/B's and personal computers and work stations (editing devices) connected to the host computer. In this case, the host computer performs a prescribed processing using the input data and the data registered in the D/B's and, from the data obtained by the processing, selects pertinent data and causes the data to be registered in the D/B's.
As described above in the conventional editing apparatus wherein the host computer is provided with many editing devices, heavy traffic of input and output data through the editing devices has the possibility of causing temporary congestion of load on the host computer and consequent impairment of the computer's capacity for data processing.
The drawback mentioned above is eliminated by interposing medial computers between the host computer having the D/B's connected thereto and the small computers handling input and output data, causing the medial computers to control the small computers and carry out data processing, and enabling the host computer to engage exclusively in controlling the input data to and the output data from the D/B's.
An attempt to employ as the host computer a large general-purpose computer which is serving as a common host computer for various data processing systems entails the following problem.
Specifically in the editing apparatus constructed as described above, when the transfer of data between the medial relaying computers and the large computer is effected by a real-time processing, namely a processing which comprises receiving demands or data for processing from time to time, immediately carrying out a processing thereon, and feeding out the result of the processing, the large-scale computer is compelled to stand in a suspended state waiting for the arrival of the input data from the medial computers even when the actual work of editing is not in progress.
The time in which the large computer is held in an idle state is long and, as the result,
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Miyoshi Akito
Terai Hiromitsu
Cosimano Edward R.
Honda Giken Kogyo Kabushiki Kaisha
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