JPH01276857A - Data transmitting system - Google Patents

Abstract

PURPOSE:To attain data transmission between different machine types by transmitting the contents of a code converting table from a host computer to a terminal when the code, which cannot be identified by a terminal, is present, loading this to a converting table provided at the terminal and referring to and translating the code converting table. CONSTITUTION:A code converting table 12 to make a code, which cannot be identified out of the codes to arrive at a communication line 10, into an address value is provided at a terminal 11 connected to a host computer 1 by a communication line 10. At the host computer 1, a means to transmit the data corresponding to the code, which cannot be identified in accordance with the request from the terminal 11, to the terminal is provided, and further, the data transmitted by the means to the terminal 11 are stored into the said address of the table 12. Thus, even when the host computer and the terminal are mutually the different machine type, a normal data transmission can be executed without a program loading.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention is used for data transmission between a host computer and a terminal.

The present invention is used when the host computer and terminal are of different models or are models of different manufacturers.

〔overview〕

The present invention is a data transmission method in which data is transmitted between a host computer and a terminal using a basic protocol, and when there is a code that cannot be identified by the terminal, the contents of a code conversion table are transmitted from the host computer to the terminal,
By loading this into a conversion table provided on the terminal and translating it by referring to this code conversion table, data can be transmitted normally even if the host computer and terminal are of different models or models of different manufacturers. This is what I did.

[Conventional technology]

Conventionally, in this type of data transmission, a program for the host computer was also created in the terminal, and the terminal was activated, input/output processing was performed by the peripheral device, and data was received from the host computer.

[Problem that the invention seeks to solve]

In the conventional data transmission described above, it is necessary to load and execute the terminal program by starting it from the host computer, and it takes time and effort to load the terminal program on the terminal every time data is transmitted. In addition, because programs for host computers and terminals are created in languages for different operating systems, it is not possible to centrally manage source programs, and furthermore, data transmission between host computers and terminals using the basic protocol is The disadvantage is that codes that cannot be identified cannot be transmitted.

The purpose of the present invention is to eliminate such drawbacks, and to provide a method that allows normal data transmission without program loading even if the host computer and terminal are of different models or models of different manufacturers. do.

[Means for solving problems]

The present invention provides a data transmission system comprising a host computer and a terminal connected to the host computer via a communication line, and including means for communicating via the communication line according to the host computer and terminal Niha basic protocol. , the terminal is provided with a code conversion table whose address value is a code that cannot be identified by the means among the codes that arrive on the communication line, and the host computer converts the unidentifiable code in accordance with a request from the terminal. The present invention is characterized in that the terminal includes means for transmitting data corresponding to the data to the terminal, and further includes means for storing the data transmitted by the means at the corresponding address in the table.

[Effect]

When using the basic protocol, if there is a host computer code that cannot be identified by the terminal, data cannot be transmitted to the terminal, so the position of the code that cannot be identified in block units and the code converted value are converted in advance. Store it in a table, and first pad each address with dummy data.

If there is a code that cannot be identified, a certain content will be read without this padding, so the correct data is requested from the host computer. In response to this request, the host computer transmits the correct data along with the code to the terminal.

After transmitting the code and table, the terminal replaces the contents stored in the table with padded dummy data. This translates the code into an identifiable code.

In this way, data transmission can be performed normally even if the host computer and the terminal are of different models or models of different manufacturers.

〔Example〕

Next, an embodiment of the present invention will be explained based on the drawings. FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention.

The embodiment system of the present invention includes a host computer 1 and a terminal 11 connected to the host computer 1 through a communication line 10.
means for communicating via the communication line 10 according to the basic protocol, a code conversion table 2.12 whose address value is a code that cannot be identified by the above means among the codes arriving at the communication line 10, and this code conversion table 2. The host computer 1 is provided with means for transmitting data corresponding to an unidentifiable code to the terminal 11 in accordance with a request from the terminal 11, and furthermore, the host computer 1 is provided with means for transmitting data corresponding to an unidentifiable code to the terminal 11 in accordance with a request from the terminal 11. includes means for storing the data transmitted by this means in the corresponding address of the code conversion table 12.

The operation of the system according to the embodiment of the present invention configured as described above will be explained. FIG. 2 is a flowchart showing the flow of operations.

From the host computer 1 to the terminal 1 via the communication line 10
1, if there is a code that cannot be identified by the terminal 11, the terminal 11 notifies the host computer 1 that the code is unidentifiable.

Upon receiving this notification, the host combination coater 1 reads the contents of the code conversion table 2 and transmits the address value of the conversion table corresponding to the unidentifiable code to the terminal 11. The terminal 11 identifies it by this address value and stores the transmitted data in the code conversion table 12.

Due to this operation, when a program for data transmission using the basic protocol is executed on the host computer 1, the code that arrives because the host computer 1 and the terminal 11 are different models from each other, or because they are models from other manufacturers, is prevented. Data can be transmitted normally even with unidentifiable codes.

〔Effect of the invention〕

As explained above, according to the present invention, when a data transmission program is executed on a host computer using a basic protocol, if there is a code that cannot be identified on the terminal, by using a code conversion table,
This has the effect of allowing normal data transmission even if the host computer and terminal are of different models or models of different manufacturers.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention. FIG. 2 is a flowchart showing the operation flow of the embodiment of the present invention. 1...Host computer, 2.12 River code conversion table novel 3.13...Data file, 1o...Communication line, 11...Terminal. Patent applicant: NEC Corporation, agent: Naotaka Ide, patent attorney

Claims (1)

[Claims] 1. A host computer, and a terminal connected to the host computer via a communication line, and the host computer and the terminal are provided with means for communicating via the communication line according to a basic protocol. In the data transmission method, the terminal is provided with a code conversion table whose address value is a code that cannot be identified by the means among the codes arriving on the communication line, and the host computer is configured to respond to requests from the terminal. Therefore, the data transmission is characterized in that it includes means for transmitting data corresponding to the unidentifiable code to the terminal, and further includes means for storing the data transmitted by the means in the corresponding address in the table. method.