JPH06161707A - Character code switching process system - Google Patents

Abstract

PURPOSE:To automatically switch the kind of EBCDIC codes used at a terminal according to an indication from a host. CONSTITUTION:The host 1 is equipped with a program 2 which uses plural kind of EBCDIC codes and the terminal 4 is equipped with a kind decision part 6 which checks the kind of EBCDIC codes that data from the host 1 use. The program 2 informs the kind decision part 6 of the kind of EBCDIC codes as to data that the program itself sends. The kind decision part 6 determines a kind of code conversion to be performed thereafter on the basis of the information and the terminal 4 performs the determined kind of code conversion.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a character code switching processing system, and more particularly to a character code switching processing system in which the host switches the types of EBCDIC codes used in so-called office computers.

EBCDI has historically been used in commercial computers.
Although the C code is used, the EBCDIC code is also used in so-called office computers due to this influence.

[0003]

2. Description of the Related Art FIG. 4 is a diagram for explaining a conventional technique, namely, a so-called office computer, that is, E as its character code.
A data processing device that uses the BCDIC code will be described.

In the data processing apparatus of FIG. 4, the host (or office computer) 1 to the terminal (PC)
The data transmitted to (personal computer) / WS (workstation) 4 conforms to the EBCDIC code. On the other hand, the terminal 4 uses the JIS8 code as a character code system inside thereof. The host 1 side has historically used the EBCDIC code, and the terminal (PC / WS) 4 side has a recent trend of JIS.
8 code (or ASCII code, EUC code) is used.

Therefore, the display emulator 5 is
The EBCDIC code sent from the host 1 is set to JI
After the code conversion into the S8 code, an instruction is given to the display device 10. The display emulator 5 is a program that operates on the terminal 4 for the host 1, and performs the same operation as the display device (actual device) on the terminal 4 such as a PC / WS. Since the programs 11 other than the display emulator 5 originally operate on the terminal 4, the JIS 8 adopted by the terminal 4 is used.
Originally using the code.

By the way, the EBCDIC code contains EB
There are multiple types such as CDIC (kana) code, EBCDIC (lowercase) code, EBCDIC (Spain) code. In these plural types of different EBCDIC codes, uppercase letters and numbers are commonly present, and one character is always assigned the same hexadecimal code.

On the other hand, katakana exists only in the EBCDIC (kana) code, and lowercase letters exist only in the EBCDIC (lowercase) code. Some kind of E like this
For characters that are only present in the BCDIC code (Katakana, lowercase letters, etc.), the same code (1
Hexadecimal number is assigned.

For example, the code "81" is EBCDIC
In the (Kana) code, it means "A" and EBCDI
It means "a" in the C (lowercase) code. That is, in the former case, "a" is displayed or printed, and in the latter case, "a" is displayed or printed.

Now, as shown in FIG. 5, from the host 1 to the terminal 4
Consider a case in which an instruction to display "IUEO" is sent from the first digit of the first line on the screen. This instruction is a control data “xxxx” indicating the first digit of the first line and a code (hexadecimal) corresponding to “aiueo” “81828”.
38485 ".

In the terminal 4 which has received this instruction, the display emulator 5 decodes the code "8182 ..." According to a predetermined rule, and then decodes it according to JIS.
Convert to 8 codes.

If the code transmitted from the host 1 is defined as an EBCDIC (kana) code as a rule, the display emulator 5 converts the EBCDIC (kana) code into a JIS8 code. Be done. That is, the correct conversion is performed.

In this case, as shown in FIG. 5, for example, the code "81" is "A" in the EBCDIC (kana) code.
Meaning "A" in the JIS8 code
Is converted into a code "B1" meaning ". Then, with this code "B1", "A" is displayed in the first digit of the first line. That is, the correct display is performed.

On the other hand, when the code transmitted from the host 1 is defined as the EBCDIC (lowercase) code as a rule and data dependent on the EBCDIC code is transmitted, it is correct. No conversion is done. That is, as shown in FIG.
Although the IC (kana) code should be converted to the JIS8 code, the EBCDIC (lower case) code is converted to the JIS8 code. this is,
This is because the display emulator 5 performs conversion according to the rules.

Specifically, as shown in FIG. 6, for example, the code "81" is originally transmitted from the host 1 as data meaning "A" in the EBCDIC (kana) code. This is similar to the case of FIG. However,
According to the above-mentioned rules, it is decoded as data in the EBCDIC (English lower case) code. That is, the code "81" in the EBCDIC (English lowercase) code, that is, "a"
The data is decoded as the data representing "1" and converted into the code "61" representing "a" in the JIS8 code. And
This code "61" causes "a" to be displayed in the first digit of the first line. That is, the character originally "a" is displayed as "a".

[0015]

FIG. 7 is a diagram showing the problems of the prior art. Since the setting of the above-mentioned rules (the type of EBCDIC code used in the rules) needs to be performed prior to the transmission / reception of data, it is performed when the (operation) environment is set on the terminal 4 side. That is, when the display emulator 5 is started up, which kind of EBCDIC code is to be used is determined in the environment setting executed by the operator in the initial stage.

For example, when the program on the host 1 side that has requested activation uses the EBCDIC (kana) code, the type of EBCDIC code to be used is set to match this.

However, as described above, the E to be used
Since the type of BCDIC code can be set only in the environment setting, the following problems occur.

If the program 12A using the EBCDIC (kana) code needs to handle English small letters while using the display emulator 5, the operator performs the following operation as shown in FIG. That is, once the display emulation is terminated, the environment of the terminal 4 is newly set, and the character code is changed to EBCDI.
Switch from C (kana) code to EBCDIC (lowercase) code. Then, the display emulation is restarted again. This allows the program 12B using the EBCDIC (lowercase) code to (correctly) use the display emulator 5.

As can be seen from the above, the conventional switching of the character code (type of EBCDIC code) depends on the manual operation of the operator, which is burdensome and troublesome for the operator. In addition, the operator is the EBCDIC required by the program on the host 1 side.
I had to know the type of code in advance, and required a certain amount of knowledge.

On the other hand, when viewed from the host 1 side, EBCDI
It took an extremely long time to switch the type of C code. Further, one program can use only one type of EBCDIC code, which is inconvenient because the program must be divided.

An object of the present invention is to use an EBC used in a terminal.
Another object of the present invention is to provide a character code switching processing system in which the type of DIC code is automatically switched according to an instruction from the host.

[0022]

FIG. 1 is a block diagram showing the principle of the present invention, showing a data processing device according to the present invention. This data processing device uses a host 1 that uses the EBCDIC code.
And a predetermined code other than the EBCDIC code (for example, J
The EBCDIC code data transmitted from the host 1 to the terminal 4 is connected to the terminal 4 using the IS8 code), and the terminal 4 performs code conversion to the predetermined code data.

The host 1 comprises a program 2 which uses a plurality of types of EBCDIC codes. Terminal 4 is host 1
And a type determination unit 6 for checking the type of the EBCDIC code used by the data from.

The program 2 notifies the type determining unit 6 of the type of EBCDIC code for the data transmitted by itself. Upon receiving this notification, the type determination unit 6 determines the type of code conversion to be executed after that point based on the notification, and the terminal 4 performs the code conversion of the determined type.

[0025]

FIG. 2 is an explanatory view of the operation of the present invention. The program 2 existing in the host 1 includes a plurality of types of EBCDIC codes, such as EBCDIC (kana) code and EBCDI.
Use C (lowercase) code and.

First, when the program 2 uses the EBCDIC (kana) code, in the terminal 4, the data from the host 1 or the program 2 may be the EBCDIC (kana) code depending on the environment setting, for example. , Is preset. In this case, the data from the host 1 or program 2 is, for example, katakana "radio".
Is displayed correctly.

Next, when the program 2 sends the data using the EBCDIC (English lower case) code to the terminal 4, the character code switching process is executed prior to the transmission of this data.

That is, the program 2 notifies the type determination unit 6 of the terminal 4, in particular, that the data to be transmitted by itself after that time point uses the EBCDIC (lowercase) code. Upon receiving this notification, the type determination unit 6 determines the type of code conversion to be executed after that point based on this notification. In this case, it was decided that the code conversion from the EBCDIC (kana) code up to that point to a predetermined code (for example, JIS8 code) should be executed, and thereafter, from the EBCDIC (lowercase) code to the JIS.
Specifies that code conversion to 8 codes should be performed. As described above, since the type of code conversion is switched by this notification, this notification is a code (character code) switching request.

The terminal 4 uses this defined EBCDIC.
Performs code conversion from (lowercase) code to JIS8 code. In this case, the data from the host 1 or the program 2 is correctly displayed as “Radio” including, for example, English lowercase letters. The codes of "radio" and "Radio" do not actually match.

As described above, according to the present invention, the character code (the type of EBCDIC code) is automatically switched in the terminal 4. Therefore, there is no burden on the operator, no knowledge is required, and the processing time can be extremely short. Since the code can be switched from the host 1 in the middle of processing, one program 2 can use multiple types of EBCDIC codes, there is no need to divide the program, and the processing time is short. It is possible to continuously perform the work using different character codes.

[0031]

EXAMPLE An example will be described with reference to FIGS. The host 1 is a so-called office computer, which is a data processing device historically using the EBCDIC code. The host 1 comprises a CPU (central processing unit) and a memory.

The program 2 operates on the host 1 and exists in the memory of the host 1. Therefore,
The program 2 naturally uses the EBCDIC code, but uses a plurality of types of EBCDIC codes. Specifically, EBCDIC (kana) code, EBCDIC
(English small letters), EBCDIC (Spain), etc. are used. The following will be described as using the former two, which are general codes.

The program 2 is, as shown in FIG.
Processing unit 2A using DIC (kana) code and EBC
And a processing unit 2B that uses a DIC (English lowercase) code. The processing units 2A and 2B respectively transmit data using the EBCDIC (Kana) code and data using the EBCDIC (English lower case) code.

The program 2 is, as shown in FIG.
It has a type notification unit 3. The type notifying unit 3 is activated, for example, when the processing units 2A and 2B start their respective processes, and when the data by these processes is transmitted or prior to this, the processing units 2A and 2B or their data are transmitted. The type of EBCDIC code used (transmitted) by the terminal 4
(Type determination unit 6) is notified.

For example, when the processing unit 2A that has completed the process activates the processing unit 2B, the processing unit 2B first activates the type notifying unit 3. In response to this, the type notification unit 3
Notifies that the type of code used by the processing unit 2B that has activated itself is an EBCDIC (English lower case) code.

Since the processing unit 2A which operates first performs the same processing, it is not necessary to set the code conversion by the operator in the initial environment setting. Program 2
The data to be transmitted by, for example, "y
y ”,“ xxxx ”, and“ 8182838485 ”.

The data "yy" indicates the type of EBCDIC code. If this is "27E0", EBCDIC
(Kana) code, EBCD if "27E1"
Indicates the IC (lowercase) code. The data “yy” is created by the type notifying unit 3 and added to the beginning of the data.

The data "yy" is added to the head of each page of the screen of the display device 10. Therefore, the EB by each processing unit 2A or 2B corresponds to each page of the screen.
CDIC (kana) code or EBCDIC (lowercase English)
Processing using the code is executed.

The data "xxxx" is the display position control data on the screen, as described above, and indicates, for example, the first digit of the first line. The data “8182 ...” Is data corresponding to “aiueo” or “abcde” as described above. That is, the data "8182 ..."
If it is interpreted as a (kana) code, "aiueo" is displayed, and if it is interpreted as an EBCDIC (English lowercase) code, "a"
bcde ”is displayed.

The terminal 4 is connected to the host 1, but can function as a personal computer (PC) or a workstation (WS) itself. Terminal 4
Is a data processing device that uses JIS8 code or the like as a recent trend.

The programs operating on the terminal 4 (excluding the display emulator 5) naturally use the JIS8 code, and therefore, the display device 10 which also uses the JIS8 code can directly request the display. .
A program (not shown) excluding the display emulator 5 performs a desired display on the screen of the display device 10 via a display processing unit (not shown) of the terminal 4.

On the other hand, the program 2 of the host 1
Since the EBCDIC code is used, display can be requested to the display device 10 only through the display emulator 5. The display emulator 5 is a program which operates on behalf of the host 1 on the terminal 4, and after transcoding the data received from the host 1,
The display device 10 is requested to display in a predetermined data format.

For this purpose, the display emulator 5
Is a type determination unit 6, a code conversion unit 7 (7A, 7B,
...), and has a display processing unit 9. Further, a conversion table 8 (8A, 8B, for converting codes used by the code converting unit 7
…) Is provided.

The type judging unit 6 receives the notification from (the type notifying unit 3 of) the program 2, and based on this, the code conversion to be executed by the display emulator 5 (code converting unit 7) after that point. Determine the type of. That is, which of the code conversion units 7A, 7B, ...
Select whether to start and then start this.

The code conversion unit 7 includes a plurality of code conversion units 7.
It consists of A, 7B, .... Code conversion units 7A, 7B, ...
Performs the predetermined code conversion using the predetermined conversion tables 8A, 8B, .... Conversion table 8A, 8
.. are provided corresponding to the code conversion units 7A, 7B, ..., respectively, and define the contents of code conversion executed by the corresponding code conversion units 7A, 7B ,.

For example, the code conversion unit 7A uses the EBCDI
C (kana) code data is converted to JIS8 code (code used by the terminal 4) data. Code converter 7
B uses EBCDIC (English lowercase) code data as JI
Convert to S8 code data. This allows host 1
The data from is the data that can be used by the terminal 4.

The display processing unit 9 executes the processing necessary for displaying this on the screen of the display device 10 on the basis of the code-converted data (JIS8 code data) from the code conversion unit 7, and displays it. The device 10 is caused to display this data.

Now, it is assumed that the data "yyxx ..." Is transmitted from the program 2 to the terminal 4 as shown in FIG.
In the terminal 4 which has received this data, since the data has been received from the host 1, the display emulator 5 is activated.

In the display emulator 5, first, the type determination unit 6 takes in the leading data "yy" of the data. The data “yy” is a code switching request created by the type notifying unit 3 and added to the beginning of the data.
The type determination unit 6 interprets the data “yy” and activates the code conversion units 7A, 7B, ...

For example, if the data "yy" is "27E1", the EBCDIC (English lower case) code is instructed, and the code conversion unit 7B for converting this to the JIS8 code is activated.

The activated code conversion section 7B takes in the data "8182 ..." Of the data. Then, using the first two hexadecimal numbers “81”, the conversion table 8B corresponding to the self is referred to, and “6” in the JIS8 code corresponding to “81” in the EBCDIC (lowercase) code is referred to.
1 ”. The codes “81” and “61” both mean the lowercase letter “a”. That is, the code is correctly converted.

Similarly, the hexadecimal number "8283 ..."
See the conversion table 8B by dividing the code "6263".
… ”Is obtained. These represent the small letters "bcde". After that, the display processing unit 9 displays the JIS8 code “6162 ...”.
Is received, and a predetermined process is performed on the received message to cause the display device 10 to execute the display of English lowercase letters "abcde". At this time, the display processing unit 9 determines that the data “xx
xx ”is taken in, it is interpreted, and it is known that the display from the first column of the first line of the screen is instructed. Therefore, the display processing unit 9 instructs the display device 10 to display, for example, the lowercase letter "a" in the first digit of the first line.

On the other hand, if the data "yy" is "27E0", it means that the EBCDIC (kana) code is instructed, so that the code converting section 7A is activated. The code converting unit 7A obtains the code "B1" corresponding to the code "81", for example, by referring to the conversion table 8A. Both of these mean "a". Similarly, "8283 ..."
"B2B3 ..." is obtained from. That is, the correct code that means "Iueo" is obtained.

Here, it is assumed that in the program 2, the processing unit 2A has previously processed and transmitted the data to the terminal 4. In this case, the code conversion unit 7A is activated. That is, the display emulator 5 is in a state of executing the process of converting the EBCDIC (kana) code into the JIS8 code.

In this state, when the processing unit 2A finishes the processing and the processing unit 2B is activated, the processing unit 2B sets 1 of the screen data for displaying the screen used by itself on the display device 10.
The page portion is transmitted to the terminal 4. Along with this, the processing unit 2B
Sends the screen data with "27E1" being the above-mentioned data "yy" added to the beginning.

As a result, the display emulator 5
Then, the code conversion unit 7B is activated in place of the code conversion unit 7A up to that point. That is, the display emulator 5 uses the EBCDIC instead of the code conversion used up to that point.
(Lowercase letters) The code is converted to the JIS8 code.

Therefore, the display emulator 5 is
The type of code used by the data from the host 1 is recognized by the notification from the host 1 (the type notifying unit 3 or the program 2), and the type of code conversion is switched according to this. In other words, the character code used by the data sent from the host 1 to the terminal 4 is switched by the notification from the host 1.

The EBCDIC code is EBCDIC.
Needless to say, the present invention can be applied to a (Spain) code or the like. Further, the type notifying unit 3 may be provided outside the program 2, and the display emulator 5
May exclude the display processing unit 9.

The program 2 may be composed of a plurality of programs. For example, the first and second programs are EBCDIC (kana) code and EBCD, respectively.
It may be configured to use an IC (lowercase) code. This corresponds to the case where the processing units 2A and 2B in FIG. 2 are configured as independent programs.
That is, the host 1 may include a plurality of programs 2 each of which uses different EBCDIC code.

Alternatively, the first program is EBCDI
The C (kana) code and the EBCDIC (lowercase letter) code may be used, and the second program may use the EBCDIC (kana) code (or the EBCDIC (lowercase letter) code). That is, the host 1 has a plurality of programs 2, and each program 2 has one or more EBs.
The CDIC code may be used, and the EBCDIC code used by each program 2 may be wholly or partially different.

[0061]

As described above, according to the present invention,
In the character code switching process, the host notifies the terminal of the type of the EBCDIC code used by the host, so that the character code can be automatically switched in accordance with the type of the code in the terminal. Can be eliminated, and the processing time can be shortened. On the other hand, processing using different character codes can be continuously performed from the host side.

[Brief description of drawings]

FIG. 1 is a principle configuration diagram of the present invention.

FIG. 2 is an explanatory view of the operation of the present invention.

FIG. 3 is an explanatory view of an embodiment.

FIG. 4 is a diagram illustrating a conventional technique.

FIG. 5 is a diagram illustrating a problem of the conventional technique.

FIG. 6 is a diagram illustrating a problem of the conventional technique.

FIG. 7 is a diagram illustrating a problem of the conventional technique.

[Explanation of symbols]

 1 office computer (host) 2 program 3 type notification unit 4 terminal (PC / WS) 5 display emulator 6 type determination unit 7, 7A, 7B code conversion unit 8, 8A, 8B conversion table 9 display processing unit 10 display device

Claims (1)

[Claims] 1. A host using EBCDIC code.
(1) and a terminal (4) using a predetermined code other than the EBCDIC code are connected, and the EBCDIC code data transmitted from the host (1) to the terminal (4) is
In a data processing device for converting data of the predetermined code in the terminal (4), a program (2) using a plurality of types of the EBCDIC code is stored in the host.
In preparation for (1), the terminal (4) is equipped with a type determination unit (6) for checking the type of the EBCDIC code used by the data from the host (1), and the data transmitted by the program (2) itself. About the type of the EBCDIC code to the type determination unit (6), the type determination unit (6) determines the code conversion to be executed based on the notification, and the terminal (4) is determined. Character code switching method characterized by performing code conversion.