JPS624740B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a data transfer control system for transferring data from a terminal to a processing device.

In a processing system in which a terminal device and a processing device are connected, such as a commercial transaction system (hereinafter referred to as a POS system), the data transferred from the terminal device includes general sales data and data that requires urgent processing such as credit processing. There are two types of data: , and data whose processing priority is higher than that of sales data. In the case of the former general data, the number of interrupts to the processing device can be reduced by transferring n pieces of data input from the keyboard of each terminal to the processing device in blocks, but in the latter case, the number of interruptions to the processing device can be reduced. In the case of urgent data, it is necessary to transfer the data to the processing device and interrupt it as soon as the data is generated. For this reason, in the conventional system, the number of interrupts to the processing device increases accordingly, and there is a drawback that the load required for interrupt processing on the processing device cannot be reduced.

The present invention was made to solve the above-mentioned drawbacks, and an object of the present invention is to provide a data transfer control method that improves data transfer efficiency.

In the present invention, when a terminal device having an input section and a processing device are connected, and the input data from the input section reaches a predetermined amount, the input data is blocked and first interrupt request information requesting data transfer is sent. A system for determining the occurrence of second interrupt request information having a higher order than the first interrupt request information; The terminal device is provided with means for blocking and transmitting the interrupt request information and input data that has already been input, and the processing device is provided with means for identifying the input data in the blocked data and the second movement request information. When the second interrupt request information is generated while inputting data from the input section of the terminal device, the second interrupt request information and the input data that have already been input are blocked, and the first interrupt request is processed. This is a data transfer control method characterized by issuing information and sending the blocked data to a processing device.

Hereinafter, the present invention will be explained with reference to the drawings. The drawing is a block diagram illustrating an embodiment of the present invention.
1 is a keyboard, which corresponds to a terminal (cash register) in, for example, a POS system, 2 is a control section, 3 is a discrimination section, 4 is a storage device, 5 is a buffer, 6 is a communication line, 7 is a processing device, 8 is an identification section, 9 is a processing section, 10 is a data section,
11 is an interrupt data section, 12 is a main storage device, A is interrupt information, B ₁ , B ₂ , B ₃ are input data, and n is the number of data. Although only one keyboard 1 is shown, in reality, a plurality of keyboards are connected to the control unit 2. Control unit 2 and keyboard 1 in the drawing
and the storage device 4 constitute a terminal device side system. In the drawing, input key 1 on keyboard 1
The input data B ₁ to Bn from the controller 3 are sent to the storage device 4 via the contact C of the switching unit 14 by the determining unit 3 of the control unit 2 and stored in the buffer 5 . Immediately after input data B ₃ is input, for example, when emergency interrupt information (second interrupt request) A is input using the interrupt control key 15, the determination unit 3 determines whether this interrupt information A , the input data in buffer 5
Store after B ₃ . Thereafter, the determining section 3 issues a control signal E to switch the contact of the switching section 14 to the d side, and also issues a control signal F to start up the transmission control section 16. Note that this control signal F is normally as follows:
It is issued when the number of input data B reaches a predetermined value n (for example, n=10). Upon receiving the control signal F, the transmission control section 16 blocks the data in the buffer 5, that is, the input data _B1 to _B3 and the interrupt information A, into one block data. Next, the transmission control unit 16 issues a data transfer request (first interrupt request) R to the processing device 7, and then sends the blocked data S ₁ , S ₂ , S ₃ , A to the processing device 7. . The identification section 8 identifies the received data in blocks, and stores the input data B ₁ to B ₃ in the data section 10 and the interrupt information A in the interrupt data section 11 .
Next, the processing section 9 takes out the interrupt information A from the interrupt data section 11 and performs the required interrupt processing. Furthermore, the processing unit 9 inputs the input data B ₁ to B in the data unit 10.
B Perform the process in ₃ . Note that in the embodiment, interrupt information A
In this example, the interrupt information A is input from the keyboard 1, but the interrupt information A may also be generated by the control unit 2 itself, for example, in the course of a control operation. As described above, in the present invention, when an emergency interrupt (second interrupt request) occurs during data input, this interrupt information is sent as a block together with the input data, so that the processing device 7 The number of interrupt acceptance processes can be reduced.

As described above, the present invention has the advantage that the transfer efficiency of a communication channel and the processing efficiency of a processing device can be significantly improved by blocking emergency data such as interrupt information and transmitting the block together with general data.

[Brief explanation of the drawing]

The drawing is a block diagram illustrating an embodiment of the present invention, and the symbols used in the drawing are as follows. 1 is a keyboard, 2 is a control unit, 3 is a determination unit, 4
is a storage device, 5 is a buffer, 6 is a communication line, 7 is a processing device, 8 is an identification section, 9 is a processing section, 10 is data, 11 is an interrupt data section, 12 is a main storage device,
13 is an input key, 14 is a switching unit, 15 is an interrupt control key, 16 is a transmission control unit, A is interrupt information,
B ₁ , B ₂ , B ₃ are input data, c, d are contacts, E,
F indicates a control signal, and R indicates a data transfer request.

Claims (1)

[Claims] 1. When a terminal device having an input section and a processing device are connected, and the input data from the input section reaches a predetermined amount, the input data is blocked and the first interrupt request information requesting data transfer is issued. In a system that sends blocked data to a processing device, the first
A means for determining the occurrence of second interrupt request information having a higher order than that of the interrupt request information, and a block for transmitting the second interrupt request information generated during data input and input data that has already been input. means is provided in the terminal device, and means for identifying the input data in the blocked data and the second movement request information is provided in the processing device. When interrupt request information is generated, the second interrupt request information and the input data that have already been input are blocked, the first interrupt request information is issued, and the blocked data is sent to the processing device. Characteristic data transfer control method.