JPS62285126A - Picture output system - Google Patents

Abstract

PURPOSE:To display the same picture without transmitting it to a terminal equipment by storing the picture sent to the terminal equipment in the terminal equipment. CONSTITUTION:An application program 6 produces a picture output request and the picture number given uniquely to a picture 17 stored in a memory 16 set in a terminal equipment is stored to a picture table 5. A picture inquiry program 3 uses the table 5 to check whether the requested picture is stored or not in the memory 16. A picture production program 7 produces the picture to be outputted to the equipment 2 if the requested screen is not stored in the memory 16. A display picture switching part 13 perform the switch between the display of the picture stored in the memory 16 and the display of the picture received from a processor 1. Thus it is possible to reduce the quantity of data received via a communication circuit and also to shorten the data transfer time.

Description

Detailed Description of the Invention 3. Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a screen output method suitable for a high-speed screen output terminal.

[Conventional technology]

The conventional screen output method is r) IITAC Manual Program Product VO53 Data Communication Management System DCCM 3 Explanation p39-p51, as the screen for which a single screen output is requested must be converted to a terminal-specific data format. , it was necessary to send a request to a conversion-only program to convert the data format of the screen.

The converted screen data is sent from the communication control program to the terminal via the communication line. When the terminal receives one screen of data, it outputs the screen.

[The opening point that the invention attempts to solve]

In the conventional methods described above, a screen to be displayed on a terminal always requires processing to convert the screen into a data format specific to the terminal. Therefore, this conversion process.

This has been one of the impediments to increasing the speed of screen transmission processing from the processing device to the terminal.

In addition, the screen data converted into a terminal-specific data format is sent from the processing device to the terminal via the communication circuit.
The amount of screen data was large, and it took time to transfer the data.

An object of the present invention is to speed up the screen transmission process from the processing device to the terminal by reducing the time required for the data format conversion process and data transfer.

[Means for solving problems]

The above purpose is to store the screen numbers of the screens output to the terminal in chronological order in a screen table, check whether the screen number of the screen for which output was specified is stored in the screen table, and check how many screens have been displayed in the past. It has a processing device that has a means to calculate whether the screen is the same as the one displayed, and a memory that can store the screen.
The screen that has been output once to the memory can be stored in chronological order, and by specifying how many screens in the past the screen has been displayed, it has a means for extracting from the memory and outputting one screen to the stored screen. This can be achieved by providing a terminal.

[Effect]

When the terminal displays a screen requested to be output by the processing device, the terminal stores the screen in chronological order in its internal memory, and by specifying how many screens in the past the screen was displayed, It has the ability to retrieve and display a screen stored in memory. In addition, the processing device has a screen table for storing the screen numbers of the screens sent to the terminal, and this screen table allows the processing device to know the screens stored in the terminal, and requests output. If you find out that the screen where the was located is stored in the terminal,
The processing device can display the requested screen by calculating how many screens are the same as the previously displayed screen and sending the calculation result to the terminal. This reduces data format conversion processing unique to the terminal, and also eliminates the need for data to be sent to the terminal, reducing data transfer time and enabling high-speed screen output.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. 1st
The figure shows the overall configuration of an embodiment of the present invention. First, the constituent elements will be explained. 1 is a processing device, 2
are terminals, and they are connected to each other through a communication port Afi21. 6 is an application program that generates a screen output request. 5 is a screen table in which screen numbers of screens (stored screens 17) stored in the terminal internal memory 16 are registered. The screen number is a number uniquely assigned to each screen. 3 is a screen number verification program, which has the function of using the screen table 5 to check whether the screen requested for output is stored in the internal memory 16 of the terminal, and to switch the processing depending on whether or not the screen is stored. 7
is a screen creation program which uses the screen library 8 to create a screen data format that can be output to the terminal when the screen requested for output is not stored in the internal memory of the terminal. 12 is a communication control program that has the function of controlling communication between the processing device and the terminal device via the communication line 21; 13 is a display screen switching unit; It has a function to display or switch the screen sent from the processing device. A single screen extraction unit 15 extracts the screen from the internal memory of the terminal. The display screen switching unit also has a function of passing processing to the screen storage unit 14 when writing a screen to the internal memory of the terminal. Reference numeral 18 denotes a screen display unit, which displays a screen on which an output request is made. Next, the operation of each component will be explained. A screen output request is made by a 5END command written in the application program 6.

The 5END command sends the screen number P to the screen number verification program.

The operation of the screen number verification program will be explained with reference to FIG. The screen verification program that receives the screen number from the application program checks whether the screen number is registered in screen table 5.311 The screen table can register n screen numbers, and the screen output request is If so, it is managed using an algorithm that registers the screen number of the screen for which the screen output was recently requested, instead of the screen number for the screen for which the screen output was requested the oldest.

(Screen registration algorithm) If the screen number for which the screen output request was made is registered in this screen table, calculate how many screens ago the same screen was in the past.33゜This can be easily derived from the 1-screen number registration algorithm. Can be done. The fact that the screen table has been registered means that the screen for which the output request was made is stored in the internal memory 16 of the terminal.

Therefore, in the screen control code used when displaying the screen on the terminal to retrieve the stored screen from the terminal memory,
At 34°38, set the storage screen retrieval request code.
In accordance with the screen registration colgorism (described above), after registering the screen number, the screen control code and PL are sent to the communication control program at 39, and this information is sent to the terminal 2. The control code is the ESC command (hexadecimal I) as shown in Figure 3.
B) is added to the beginning 41, and then the stored screen retrieval request code is set in 16 bits 42°, and 5 is added to 43.
Set R1, which is the value calculated in step 2.

If the screen number of the screen for which the output request is made is not registered in the screen table at 32, the screen number is registered in the screen table according to the screen registration algorithm 36, and the screen number is sent to the screen creation program 7.37 Here, The screen creation program retrieves the screen corresponding to the screen number requested for output from the screen library 8 and converts the screen into a data format specific to the terminal. This will create a screen that can be output to the terminal. After that, the process moves to the screen number verification program, and the screen created by the one-screen creation program is sent to the terminal device 2 via the communication system 821 by being transferred to the communication control program.

As mentioned above, screen data sent from a communication line to a terminal includes data in which a control code and screen number are set, and data in which screen data is sent directly. The display screen data switching section 13 is.

The screen displayed on the terminal device is switched according to these two types of data. The display screen data switching unit will be explained with reference to FIG. It is checked 51 whether the retrieval request code on the storage screen 7 is set in the control code of the screen data sent from the communication line, and if the retrieval request code is set, the communication line is sent to the screen retrieval unit 15. 52. Then, by setting the mode to display the retrieved screen, the screen will be displayed on the screen display section. The 53° output screen that is sent and displayed is stored in the internal memory of the terminal using the same algorithm as the screen number registration in the screen table 5.55. On the other hand, if the stored screen retrieval request code is not detected in 51, it is determined that the data sent from the 1 communication line is screen output image data, and the mode is set to display the sent data on the screen display section. do. As a result, the screen data sent from the communication line is displayed on the screen display section. The displayed screen is then stored in the internal memory of the terminal according to the screen number registration algorithm.

As described above, according to the present embodiment, up to three screen strokes of a screen that has been edited once can be stored in the terminal. Therefore, when an application program issues a screen output request, if the screen has been displayed within the past n screens, the terminal will receive information about how many screens have been displayed in the past and the stored screen from the terminal's internal memory. It can be displayed simply by sending the retrieval request code. Therefore, it is possible to reduce the processing that was essential with conventional technology, such as retrieving a screen from a library and converting data formats specific to the terminal.6 Furthermore, data transfer via a single communication line can also be
In the present invention, since less data is required to be transferred, the transfer time can be significantly reduced compared to the prior art. Also, the screen table and the registration algorithm in the terminal's internal memory.

In addition to the algorithm shown in this embodiment, there is also an algorithm that keeps the frequently used one and replaces the least frequently used one with the newest one.

〔Effect of the invention〕

According to the present invention, it is possible to reduce data format conversion processing unique to a terminal when outputting a screen to a terminal, which was impossible with conventional technology, and the amount of data sent via a communication line can be reduced, so that data cannot be transferred. The time required for this can be reduced.

[Brief explanation of the drawing]

FIG. 1 is an overall configuration diagram of an embodiment of the present invention, and FIG.
The operation flowchart of the screen matching program in Figure 3 is the data format sent from the processing device to the terminal when the six screens requested to be output are stored in the internal memory of the terminal.
The figure shows the display screen switching section of FIG. 1. 3...Screen number verification program, 5...Screen table.

Claims (1)

[Claims] 1. In a system in which a terminal device and a processing device are connected by a line, and a screen corresponding to the screen number is output to the terminal device by specifying a screen number from the processing device, the processing device: Store the screen numbers of the screens output to the terminal device in chronological order in a screen table, check whether the screen number of the screen for which output was specified is stored in the screen table, and determine how many screens in the past the two sides are the same. The terminal device is equipped with a memory capable of storing the screen, stores the screen once output in the memory in chronological order, and specifies how many screens in the past the screen is. , has a means for retrieving the stored screen from the memory and outputting the screen, and the terminal device stores the stored screen in the terminal device based on information about how many screens in the past the screen is the same as calculated by the processing device. A screen output method characterized by extracting the displayed screen and outputting it on the screen.