JPS5939770B2 - Data transfer method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to data transfer between a solid device and a terminal device in an electronic computer system.

Conventionally, when data related to one process is divided and transferred from a solid device to a terminal device, the terminal side requests the solid device to transfer the subsequent data after the output processing of that data is completed. It was being done. In order for a solid device to send one data to a terminal device and then send the next data, state information of the terminal device may be necessary. This information becomes new status information after the output (printout) of the sent data is completed, so after the output is completed, it is added to the above-mentioned request and sent to the solid device. Although state information may not be necessary for a solid device, the terminal device cannot know this, so the control is always to add state information and send a request after output is completed. Therefore, terminal device operators are spending a lot of time on their devices. Next, a specific example will be explained.

Here, a system including a bank terminal device and a central processing unit will be taken as an example. The data sent from the solid device is information such as the current balance of the account. This will be printed on your passbook. The passbook is inserted between the platen of the printing device and the print head with the page to be printed open, so once the opened page is fully printed, the operator must print a new page. The next print data must be printed after the paper is turned over and inserted again. For this reason, after printing of certain data is completed, terminal status information indicating whether there is a print margin is sent, and the solid device uses this to control whether to send the next data or wait for a while. In this case, it is necessary for the solid device to receive the terminal status information. However, in some cases, the terminal device side prints on continuous paper and there is no need to worry about the printed information overflowing the paper, and in this case there is no need to transfer the terminal status information, but the same processing is performed. FIG. 1 shows a conventional processing procedure. An output message 1 is sent from the solid device, and when the terminal device receives it, it performs output processing, and when the process is completed, it sends an output request 4 with status information attached. The solid device receives this and sends the next output message 1. In this way, the output request 4 is always made after the output processing is completed.
Therefore, an object of the present invention is to eliminate unnecessary transfer of terminal status information and reduce the time required.

The gist of the present invention is to achieve the above object,
When transferring data from a solid device, information is added that instructs whether to request the next data transfer when the data is received or wait until the output processing is completed, and the terminal device follows that information. The purpose of the present invention is to configure the system so that a transfer request is made. FIG. 4 shows the configuration of the present invention.

20 is a terminal device connected to the solid device via a communication path 50.

31 is a transmitting/receiving circuit for transfer with the solid device, 32 is a program control mechanism for controlling the terminal device, 40 is an output device, and 33 is a buffer for output data from the solid device.

An outline of the processing of the program control mechanism is shown in the flowchart of FIG. In the present invention, the output data from the solid device consists of output messages and control bits as shown in FIG.

The control bits indicate whether the terminal needs to send status information. Such output data is received by the transmitting/receiving circuit 31 through the communication path 50.
Receiver 31 sends a message reception report to program control mechanism 32 via signal line 53.

When the program control mechanism 32 receives the report, it checks the usage status of the output buffer 33, and if it is not in use, immediately, or if it is in use, it waits for the end and sets the signal line 54 to the true value to activate the AND gate 34. open. As a result, the output message is transmitted from the receiver 31 to the signal line 51 to the AND circuit 34.
, are stored in the output buffer 33 via the signal line 52. Further, the program control mechanism 32 controls the output buffer 33
When the reception of the output message to is completed, the program shown in FIG. 5 is started, and the output data is first output to the output device. At this time, if the output device 40 is capable of outputting data, the output device 40 waits for the output to become possible (this state is called an output state, and when this state is released, the program is activated again), sets the signal line 55 to the true value, and outputs the output data 2 from the output buffer 33 to the output device 40 via the signal line 56, the AND circuit 35, and the signal line 58. The solid device has a control bit at the beginning of the output message as shown in FIG.

When the control bit is ``O'', it indicates a normal message, that is, a mode that requires the transfer of terminal status information, and when it is ``1'', it indicates a special message, that is, a mode that does not require the transfer of terminal status information.Special message For example, this refers to the reception of a money order telegram at a bank, and this type of data is usually printed on continuous forms.The program control mechanism 32 reads control bits at the same time as the above operations.

When the output of the output data from the output device 40 is finished, the program control mechanism 32 checks the control bit, and if it is O'', sends the output processing completion report from the output device 40 via the signal line 57 without doing anything. Go into a state where you are waiting to receive it.

If it is 1'', the signal line 5 indicates the preceding processing state and sends an output request 4 requesting the output of the next data to the solid device.
3. The data is transmitted to the solid device 10 via the transmitter 31 and the communication path 50, and enters a state in which it waits to receive a report on the reception of the next data or a report on the completion of output processing of the output data. FIG. 2 shows the processing in the above-mentioned preceding processing state,
Output data 1 is sent from the solid device to the terminal device, and as soon as the terminal device sends the data to the output device 40, an output request 4 for the next data is sent.

Accordingly, the next output data is transferred from the solid device. During this time, the output device 40 is printing the previous data. As soon as the printing of the previous data is completed, the next data can be output immediately. Program control mechanism 3
2 transmits the output processing completion report from the output device 40 to the signal line 5.
7, the program shown in FIG. The data is transmitted to the solid device 10 via the path 50, and the processing is completed. Further, if it is in the preceding processing state, the preceding processing state is canceled. Here, if the next data has already been received in the output buffer 33, the program shown in FIG. 51 is restarted to process the next data. Moreover, if it has not been received, the process ends. Since the configuration is as described above, the following effects can be obtained in the present invention.

(1) In a solid device, it is possible to specify the time point at which the terminal control device makes an output request for the next output data. can be removed or reduced if it is not needed. (5) Since the holding time T1 can be removed or reduced, the time required for processing the divided and output data in the terminal device can be shortened.

011) If the output time is longer than the holding time T1, even in systems where the communication line speed is slow, or even if the line traffic increases, the increase in output data processing time due to this can be eliminated. It is possible.

4v) Since the solid device only needs to add the message type to specify the time point at which it makes the output request, it is easier to migrate from the terminal control method of the current system.

[Brief explanation of the drawing]

Figure 1 is a time chart of conventional message transfer;
The figure is a time chart of message transfer according to the present invention, and FIG. 3 is a diagram showing the message format according to the present invention.
FIG. 4 is a block diagram of the terminal device of the present invention, and FIG. 5 is a flowchart showing control of the program control mechanism of FIG. 4. 31...Transmitter/receiver, 32...
...Program control mechanism, 33...Output buffer, 34, 35...AND circuit, 20...
...Terminal device, 40... Output device, 50.
...Communication channel.

Claims (1)

[Claims] 1. In a data transfer method in which data is transferred from a central device to a terminal device and output to an output means provided in the terminal device, the central device indicates whether or not to have the status information of the terminal device transferred to the central device. Control information is attached to the data and transferred to a terminal device, and the terminal device includes a control means for determining the control information, and when the control means determines that the control information is a predetermined value. A data transfer method characterized by issuing a request to a central device to transfer the next data.