JPS6353554B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a terminal device having a CRT display and a keyboard, and more particularly to a terminal device that can switch and display different processing data on one terminal device.

Generally, a terminal device that has a CRT display and a keyboard and is connected to a host computer stores display data sent from the host computer in a screen memory, and uses this stored display data on the CRT using a character display device. Key input data displayed on the display or input using the keyboard is sent to the host computer via the screen memory.

Conventionally, when a host computer processes two different types of work at the same time, for example, in an insurance claim processing system, counter work that requires daily input, and monthly work such as issuing receipts and statistical data. At the end of the month or at the beginning of the month, the daily work (counter work) and the monthly work overlap, and when processing these at the same time, one terminal is used for each work. It was necessary. In addition, when trying to output or input data for two types of jobs using one terminal device, a new program for screen switching is installed on the host computer, and the data or data displayed while processing one job is added to the host computer. It is necessary to add more memory to store data, and the process for switching screens becomes longer, reducing the time available for processing the original business, increasing the burden on the host computer. There were flaws.

The present invention has been made in view of the above-mentioned points, and it provides a terminal device with a screen switching function, so that it can simultaneously display two screens without imposing a burden on the host computer.
The present invention provides a terminal device that is capable of executing two tasks. The present invention will be described in detail below with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of the present invention, in which 1 is a CRT, 2 is a display driving means, 3 is a front screen memory, 4 is a back screen memory, 5 is a third screen memory, and 6 is a screen switch. 7 is a keyboard, 8 is a keyboard control means, 9 is a key input data processing means, 10 is a screen switching information storage means, 11 is a data transfer control means, and 12 is a host computer.

The display driving means 2 has a built-in character generator, a display control circuit, etc., and displays characters, etc. on the CRT 1 based on the applied display data. The front screen memory 3 and the back screen memory 4 have exactly the same capacity, and are each composed of main screen memories 3', 4' and auxiliary screen memories 3'', 4''. One screen of CRT1 is the third screen memory 5
and either the front screen memory 3 or the back screen memory 4, for example, the second
As shown in the figure, when the display screen is divided into areas A, B, and C, the display data stored in either the main screen memory 3' or 4' is switched and displayed in area A, and in area B. One screen is arranged so that the display data stored in either of the auxiliary screen memories 3'' and 4'' is switched and displayed, and the display data stored in the third screen memory 5 is always displayed in the C area. It is divided. The display data stored in the front screen memory 3, back screen memory 4, and third screen memory 5 is converted into a dot pattern for displaying characters by a character generator built in the display driving means 2. The address of each screen memory 3, 4, 5 is accessed by the display control circuit of the display driving means 2, and the stored display data is output. The display data output of the third screen memory 5 is directly applied to the display driving means 2, but the display data output of the front screen memory 3 and the back screen memory 4
The display data outputs are applied to the screen switching means 6, and one of them is applied to the display driving means 2.

On the other hand, the keyboard 7 includes character keys, number keys,
It consists of a key group 13 consisting of symbol keys, function keys, etc., and a screen switching key 14, and is controlled by a keyboard control means 8. Data keyed in from the keyboard 7 is converted into JIS code by the keyboard control means 8 and applied to the key input data processing means 9. On the other hand, the signal of the screen switching key 14 is applied from the keyboard control means 8 to the screen switching information storage means 10. The screen switching information storage means 10 is composed of, for example, a flip-flop, and depending on its contents, it controls the screen switching means 6 and the key input data processing means 9, and also controls the screen switching means 6 and the key input data processing means 9 via the data transfer control means 11 to display the screen on the host computer 12. Let us know which state you are in. The screen switching means 6 drives the display data of the front screen memory 3 when the screen switching information storage means 10 is, for example, "0", and the display data of the back screen memory 4 when the screen switching information storage means 10 is "1". On the other hand, the key input data processing means 9 transfers the key input data to the front screen memory 3 when the displayed screen memory, that is, the screen switching information storage means 10 is "0". In addition, in the case of "1", the key input data is applied to the back screen memory 4, and the key input data is displayed on the screen and sent to the host computer 12 via the screen memory in the processing state.

The terminal device is host computer 12 and line 1
5, and a data transfer control means 11 is provided between each screen memory 3, 4, and 5. Display and data writing to each screen memory 3, 4, and 5 is performed via this data transfer control means 11.
That is, the display data sent from the host computer 12 has a format determined in advance to indicate which one of the screen memories 3, 4, and 5 should be written depending on the content of the work, and the data transfer control means 11 decodes the data format and sends the display data to the corresponding screen memory,
The data is stored at an address specified by the host computer 12.

In the above-mentioned terminal device, for example, when the host computer 12 executes a program for performing counter operations and a program for performing monthly operations, the display data for counter operations will be displayed in the data format. Depending on the mat, front screen memory 3
The display data indicating the processing status of the counter business is stored in the auxiliary screen memory 4'' of the back screen memory 4, depending on the data format. The display data for this purpose is stored in the main screen memory 4' of the back screen memory 4 depending on its data format, and the display data indicating the monthly business processing status is stored in the front screen memory 3 depending on its data format. It is stored in the auxiliary screen memory 3''. Further, in the third screen memory 5, predetermined display data is stored, for example, as a display of an emergency message or a system management program.

Now, the content of the screen switching information storage means 10 is "0"
Assuming that, the screen switching means 6 applies the display data of the front screen memory 3 to the display driving means 2, so that the A area of the screen of the CRT 1 displays a display for counter operations, and the B area displays the monthly display data. The processing status of the next task is displayed. Of course, the display data of the third screen memory 5 is always displayed in the C area. on the other hand,
Since the screen switching information storage means 10 is "0", the keyboard control means 8 performs the function for counter operations, and the keyed-in data is converted into JIS code, and the key input data control means 9 is connected to the key input data control means 9. ,
The data is stored in the main screen memory 3' of the front screen memory 3, and is also sent to the host computer 12 via the data transfer control means 11. The host computer 12 executes the prescribed counter business processing based on the input data, writes the display data to the main screen memory 3' of the front screen memory 3, and displays the processing status on the back screen as necessary. The host computer 12 executes the monthly business process in parallel with the counter business process, and writes display data such as the processing results to the main screen memory of the back screen memory 4. 4', and also writes the processing situation to the auxiliary screen memory 3'' of the front screen memory 3. Therefore, even though the counter business data is displayed on the CRT 1, the display data generated due to the monthly business processing is stored one after another in the back screen memory 4, and the processing status is You can also learn about this while working at the counter.

When switching the display from counter operations to monthly operations,
Press the screen switching key 14 once. Then, the screen switching information storage means 10 becomes "1", and the screen switching means 6 converts the output from the front screen memory 3 into the back screen memory 4.
The output is switched to the output and applied to the display driving means 2.
Therefore, on the CRT 1, the display data stored in the back screen memory 4, that is, the monthly business data is displayed in area A, and the processing status of counter business is displayed in area B. On the other hand, the keyboard control means 8 switches to the function for monthly business, and the key input data control means 9 transfers the key input data converted into JIS code by key-in to the currently displayed back screen memory 4. It is output to the main screen memory 4' and stored.
The stored key input data is transferred to the host computer 1 via the data transfer control means 11 as described above.
2, and the host computer 12 executes the predetermined monthly business based on the input data. Display data generated due to processing of monthly business is written to the main screen memory 4' of the back side memory 4 and displayed, and processing status is written to the auxiliary screen memory 3 of the front screen memory 3. Furthermore, counter operations are executed in parallel with the monthly operations, and the display data resulting from the processing is written to the main screen memory 3', the processing status is written to the auxiliary screen memory 4'', and the counter operations are executed during the monthly operations. The processing status of counter operations is displayed.

Next, when the screen switching key 14 is pressed, the screen switching information storage means 10 becomes "0" again, and the screen returns to the counter service display.

As described above, according to the present invention, when a host computer is made to execute a plurality of different programs, data can be input/output for processing each program using one terminal device, which is different from conventional methods. Since it has the functions of two terminal devices, it is very advantageous in terms of cost, and the terminal device is easy to operate and use.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, and FIG. 2 is a diagram showing an example of CRT screen division. 1... CRT, 2... Display driving means, 3... Front screen memory, 4... Back screen memory, 5... Third screen memory, 6... Screen switching means, 7... Keyboard, 8... Keyboard control means, 9...Key input data processing means, 10...Screen switching information storage means, 11...Data transfer control means, 12...Host computer.

Claims (1)

[Scope of Claims] 1. In a terminal device connected to a host computer having a display device and an input device and capable of processing different first and second tasks in parallel,
and a front screen memory and a back screen memory respectively allocated to correspond to the second task, a manually operable screen switching instruction means for instructing screen switching, and storing screen switching information instructed by the means. screen switching information storage means; screen switching means for selectively applying display data in the front screen memory or back screen memory to a display driving means to display it on the display device according to the screen switching information; input data processing means for writing input data into the front screen memory or back screen memory according to the screen switching information; and sending the screen switching information and input data from the input device to the host computer;
and data transfer control means for transferring data from the host computer to a corresponding front screen memory or back screen memory according to the format, and the data transfer control means controls data input/output for a plurality of parallel processing operations of the host computer. A terminal device characterized in that it can be switched and executed by operating a screen switching instruction means. 2. In claim 1, the front screen memory and the back screen memory each have an auxiliary screen memory, and the auxiliary screen memory in one screen memory includes the screen memory corresponding to the other screen memory. A terminal device characterized in that display data indicating the processing progress of a first or second task of a host computer is stored.