KR940009451B1 - Korean character code exchange method - Google Patents

Abstract

The method converts a combination type to a completion type in a korean alphabet code. The method is realized by binary searching an inputted combination code within a predetermined area, after a combination code table and an index table are stored in a font ROM and an index table ROM, respectively. According to this invention, the code of the combination type is converted into the code of completion type, quickly.

Description

How to convert Korean code

1 is an explanatory diagram showing a 94 × 25 integer table.

2 is an explanatory diagram showing a Hangul alphabet corresponding to a partial bit structure in a 16 unit code.

3 is a conventional code conversion signal flow diagram.

4 is a control block diagram of a printer to which the present invention is applied.

5 is an exemplary combination code table according to the present invention.

6 is an exemplary view of an index table according to the present invention.

7 is a signal flow diagram according to the Hangul code conversion method of the present invention.

* Explanation of symbols for main parts of the drawings

1: central processing unit 2: system ROM

3: Font ROM 4: Index Table ROM

5: Image Generator

The present invention relates to a Hangul code conversion method in a personal computer peripheral device such as a printer, and more particularly, to a Hangul code conversion method capable of reducing the search time required to convert a Hangul combination code into a Hangul complete code. .

The Korean code system used in domestic personal computers is largely divided into a complete code system and a combined code system. The complete code system is assigned one code for each letter of the Hangul as in the first degree, and the combined code system is used as the second degree. Each code is given to the consonants and vowels of Hangul, and the codes are combined to complete the Hangul characters.

On the other hand, in print, etc., the characters corresponding to the completed codes are memorized due to the limitation of memory. When a personal computer sends a combined code, it must be read and interpreted and changed to the code system that the printer has.

This code conversion method is a form of searching for the content of the combined code lowered in the framework of the complete code.

That is, a 94 × 25 integer array of Korean characters is created based on FIG. 1, and the values of the combined codes as shown in FIG. 2 are stored in the array contents corresponding to each letter. Create an integer table.

In reading the information stored in the font ROM, as shown in the signal flow diagram of FIG. 3, first, the combined code inputted as an integer is read, and the combined code inputted from the 94 × 25 integer table is binary. After searching, find the index of the searched place, and obtain the completion code corresponding to the completion code corresponding to the row index and the column index of the 94 × 25 integer table one-to-one from the index. It is.

However, in the conventional Hangul code conversion method, when searching for a combined code in a 94 × 25 integer table, it takes a long time to search the entire table with binary search, and even after obtaining a complete code, There was a flaw such that another separate program was required to find the corresponding letter.

SUMMARY OF THE INVENTION In view of the above-mentioned deficiencies, the present invention devises a binary search using only the range of the combined code input after storing the combined code table and the index table in the font ROM and the index table ROM. When described in detail with reference to the accompanying drawings as follows.

4 is a block diagram of a control unit of a printer to which the present invention is applied. As shown therein, a central processing unit 1 for controlling the overall operation, a system ROM 2 storing system programs, and font data are shown. A font ROM 3 stored therein, an index table ROM 4 having an index table stored therein, and an image generator 5 which generates an image according to the font data.

When saving the font, save it in the font ROM (3) in the order of the characters as shown in Fig. 1, and find out the number of the letters to be printed in the complete code table, and then easily insert the corresponding letters in the font ROM (3). I can find it.

Also, if necessary, the letters of the complete code table are classified into two or three types. For example, some of them are stored as pure bitmaps and some are compressed. Even when saving as a bitmap can be easily applied.

To this end, first, a combination code table and an index table of one-dimensional dimensions as shown in Figs.

5 is an illustration of a combination code table according to the present invention. As shown in FIG. 5, indexes are assigned in the order of the characters of the FIG. 1 completed code table, and the combination code values of FIG. 2 corresponding to the letters are recorded for each index. To configure. For example, in the case of the Hangul "I" character, the combination code is "352", and the completion code corresponding to the "I" is "250". Therefore, the "250" is an index, and the combination code value "352". &Quot; and the combination code is " 300 " for the Korean " Gee ", and the order of the completed code corresponding to the " G " is " 230 " "300" is recorded.

On the other hand, all code values configurable with the combined code as shown in FIG. 2 are in the range of "0000 (hexadecimal)" to "FFFF (hexadecimal)", and this range is an arbitrary interval value. When divided by, there is necessarily one complete code that matches the first letter of each segment. Using this principle, an index table is constructed as shown in FIG. For example, in the case of the Korean character "G", the combination code is "300", and when the interval value is "100", the combination code "300" is divided by the interval value "100", and the quotient is "3". Becomes the first letter. Therefore, using the quotient "3" as an index, "230" which is an index of the fifth degree combination code "300" is recorded therein.

The conversion of the Korean code using the table constructed as described above is performed as shown in the flowchart of FIG.

If a combination code input from a personal computer is read and the combination code is divided into intervals, the share represents the index of the FIG. 6 index table. Therefore, the index finds the index i of the index table of the index table ROM 4, and adds "1" to this index i (i + 1). The contents of the indices (i) and (i + 1) thus obtained are read, and the indices (I) and (J) of the fifth degree code table are obtained from the contents. When searching only between the indexes (I) and (J) of the obtained assembly code table, the assembly code corresponding to the input assembly code can be found, and the index of the assembly code found in this way corresponds to that of the font ROM (3). Since it is in alphabetical order, it is possible to calculate the complete code.

For example, when the combination code "352" of Korean "I" is inputted as described above, when the combination code "352" is divided by the interval value "100", the quotient becomes "3". The index i is obtained by "3", and when "1" is added to the index i, the index i + 1 is obtained by "4". The index of the combination code table can be found by reading the contents of the indexes "3" and "4" thus obtained. That is, the index "230" of the combination code table can be found from the index "3" of the index table, and the index of the corresponding combination code table from the index "4" of the index table (for example, "270"). ) Can be searched for, and by searching only the index "230" to the index "270" of the combination code table, the index "250" corresponding to the combination code "352" of the Hangul "I" character can be found.

As described in detail above, the present invention configures a combination code table and an index table and stores them in a font ROM and an index table ROM, and converts the combined code inputted using the table into a complete code after binary searching only a certain range. As a result, binary search of the entire range is performed in a binary manner, and thus the time required for converting the combined code into the complete code is reduced, and the process of interpreting the completed code in printing the corresponding font is required. The effect becomes unnecessary.

Claims (1)

The combination code table and the index table are classified and stored in the font ROM 3 and the index table ROM 4, and the combination codes input from the personal computer are read, and the combination codes are divided into intervals, and the index table ROM ( Obtaining the index i of 4) and adding "1" to the index i to obtain the index i + 1 of the index table 4, and the index of the index table ROM 4 i) reading the contents of (i + 1) to obtain the index (I) (J) of the combination code table, and performing binary search between the index (I) (J) of the combination code table, Hangul code conversion method comprising the steps of finding and reading the index corresponding to the combination code.

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