JPS6274125A - Output code control device for terminal equipment - Google Patents

Abstract

PURPOSE:To make it unnecessary to change a code of a user application program by providing a mechanism for converting a processing character code of a host computer to a character code of a terminal equipment, based on a character sequence from the terminal equipment, in the host computer. CONSTITUTION:A host computer 1 for executing a processing by an EBCDIC code, and a terminal 2 for executing an input and an output by an ASCII code are connected, and a communication managing mechanism 3 for controlling the terminal 2, a terminal defining table 4 which is used in that case, and a terminal character control mechanism 5 are provided in the computer 1. Also, an output code type for determining whether the code is converted to the ASCII code with 'Kana' (Japanese syllabary) to the terminal 2, or converted to the ASCII code with a small letter of the alphabet is provided on the table 4, and the table can be changed by detecting an input character code from the terminal 2 by the mechanism 5.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an output code control device when a character code processed by a host computer and a character code unique to a terminal are different.

[Conventional technology]

FIG. 3 shows a conventional example of a conventional output code control device in which the character code to be processed in the host computer is an EBCDIC code, and the character code unique to the terminal is a kana ASCII code or an ASCII code with lowercase letters. In the figure, 1 is the main storage device.

A host computer that includes a central processing unit and processes using EBCD IC code, 2 is an AS that is connected to this host computer #1i1 and serves as a terminal that performs input and output using ASCII code.
CII terminal; 3 is a communication management mechanism that controls the ASCII terminal 2; 4 is a terminal definition table used by the communication management mechanism 3 to control the ASCII terminal;
and the terminal definition table 4 are in the host computer 1.

Next, the operation will be explained. Human data consisting of a kana AS■ code or an English lowercase AS■ code input from an ASC terminal 2 connected to the host computer 1 to the host computer 1 is converted into an EBCDIC code by the communication management mechanism 3, and this converted It is processed within the host computer 1 using the EB''CDIC code.

Conversely, the data consisting of the EBCD IC code processed by the host computer 1 is sent to the pseudonym AS by the communication management mechanism 3.
It is converted into a CII code or an ASIr code with lowercase letters and output to the ASCHp terminal 2.

At this time, the communication management mechanism 3 selects a terminal output code type that has information such as whether the EBCI) IC code output from the terminal definition table 4 is intended for a kana ASCII code or an ASCII code with lowercase letters. Convert to ASC1l code accordingly.

[Problem that the invention seeks to solve]

Conventional devices operate as described above, so when converting output data processed in EBCDIC code to ASCII code for an ASCII terminal, the lowercase English letters and part of the kana in the EBCDIC code are the same code, so the kana material is It must be converted to either ASCII code or ASCII code with English characters. Changing from kana to lowercase English characters or from lowercase English characters to ASCIIJ code with kana characters requires changing the terminal definition table and performing initialization processing. Another problem was that the user application program had to independently convert the output code to an ASC1L code instead of using the communication management mechanism to change the output code.

This invention was made to solve the above problems, and the output code type of the terminal definition table is changed to ASC.
It is an object of the present invention to provide an output code control device that can specify either a kana-attached ASCn code or an English lowercase letter ASCn-go-j-1' based on a character sequence input from a II terminal.

[Step 1 to Solve the Problem] Therefore, the output code control device according to the present invention controls the processing character code in the host computer based on the character sequence specifying the output code type inputted from the terminal. This system is characterized by having a terminal character control mechanism installed in the host computer that converts the characters into a character code specific to the terminal.

[Effect]

The terminal character control number converts the character code processed by the host computer into the character code of the terminal based on a character sequence input from the terminal and specifying an output code type.

This allows the output code type to be freely changed depending on the character sequence input by the operator from the terminal.

〔Example〕

An embodiment of the present invention will be described below based on the drawings.

In this embodiment, the EBCDrC code is used as the character code processed by the host computer, and the kana material ASCII code and the lowercase English character material A are used as the character codes unique to the terminal.
The following description assumes that there are two SCn codes.

In FIG. 1, 1 includes a main memory and a central processing unit, and E
A host computer that processes in BCD I C code, 2 is an ASCII terminal connected to this host computer 1 and performs input/output in ASCII code, 3 is an ASCII terminal
A communication management mechanism for controlling the terminal 2; 4 a terminal definition table for the communication management mechanism 3 to control the ASCII terminal 2;
5 is a terminal definition table 4 that has an output code type that determines whether to convert the ASCII terminal 2 to an ASCII code with kana characters or to an ASCII code with lowercase letters in the host computer 1. An ASCI I terminal character control mechanism that detects and changes codes. Communication management mechanism 3. A terminal definition table 4 and an ASCII terminal character control mechanism 5 are located within the host computer 1.

Next, the operation will be explained.

ASCII:'17-
ASCn code for lowercase English characters or ASC with lowercase English characters
When changing from II code to kana material ASCII code, a character sequence indicating a change request is input from the ASCII terminal 2.

The ASCII terminal character control mechanism 5 detects the character code based on the above character sequence, and changes the output type code related to the terminal compatible ASCII code in the terminal definition table 4. 6. EBCDIC output output from the host computer 1 after change. The data 61 is converted by the communication management mechanism 3 into an ASCII code with kana characters or an ASCII code with lowercase letters in accordance with the changed output code type of the terminal definition table 4, and output to the ASCII terminal 2.

The procedure of this operation is shown in the flowchart of FIG.

FIG. 2(a) shows the case where the input code from the host computer 1 is converted by the character sequence input from the ASII terminal 2. In FIG. 2(a), step 11 is inputting the character sequence from the ASCII terminal 2. Process, Step 7 12
Step 1 is a process in which the ASCII terminal character control mechanism 5 verifies the input character code based on the above character sequence.
3 is a process in which the ASCII terminal character control mechanism 5 changes the terminal definition table, and step 14 converts the input character code from the Ascn terminal into an EBCD IC code processed by the host computer 1 by changing the terminal definition table. The process, step 14, shows the process of passing the input data input by the input character code to the user application program.

FIG. 2 (bl) shows the flow of converting the output code from the host computer 1 based on the character sequence input to the ASC from the terminal 2.

FIG. 2 (in bl, step 15 is the ASCU terminal 2
step 16 is a process of checking the output code type in the terminal definition table 4 based on the character sequence, and step 17 is a process in which the output code is changed by inputting a character sequence from the host computer 1. In step 18, the EBCDIC code processed by the host computer 1 is converted into an ASCn code with a kana character.
The process of converting to I code, step 19, is based on the output code defined by the terminal definition table 4.
The process of transmitting output data to n terminal 2 is shown.

In addition, in the above embodiment, the cases of ASCII code with kana and ASCII code with lowercase alphabetic characters were explained, but the character code processed by the BOST computer may be dynamically converted into a code specific to the terminal in response to a character code request from the terminal. This embodiment has the same effect as the above embodiment.

〔Effect of the invention〕

As explained above, according to the present invention, the terminal character control converts the character code processed in the host computer into a character code specific to the terminal based on the character sequence input from the terminal and specifying the output code type. Since the mechanism is installed in the host computer, there is no need for unique code conversion in the user application program.
Furthermore, there is an effect that there is no need to perform unnecessary operations on the system such as re-initializing the system when changing between kana and lowercase letters.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram showing one embodiment of the present invention, and FIG. 2 (a
) and FIG. 2 are flowcharts showing the flow of operation of the present invention, and FIG. 3 is a configuration diagram of a conventional output code control device. l...Host computer, 2...12/2 square/one nail ASCU terminal as a terminal, 3...Communication management mechanism, 4...Terminal definition table, 5...ASCII terminal character control mechanism.

Claims (1)

[Scope of Claims] An output code control device for a terminal device that exchanges information between the terminal device and the host computer by converting character codes processed by the host computer into character codes unique to the terminal, comprising: A terminal device characterized in that a terminal character control mechanism is provided in the host computer to convert the character code processed by the host computer into a character code specific to the terminal device based on a character sequence specifying an output code type. Output code control device.