JPH02998A - Character pattern control method - Google Patents

Abstract

PURPOSE:To display a new character by deleting pattern data on characters which are already registered and registering pattern data on read characters there when a RAM for character generation reaches its capacity limit. CONSTITUTION:When pattern data on a new character is further read out of an external storage medium 63 while the RAM 62 for character generation reaches its capacity limit, the oldest character pattern data which is already registered is deleted and the pattern data which is read out of the external storage medium is registered there. Consequently, even when the RAM for character generation reaches the capacity limit, it can be confirmed whether or not the new character is accurately inputted, specially, whether or not KANJI (Chinese character)/KANA (Japanese syllabary) conversion is accurately performed.

Description

[Detailed Description of the Invention] [Summary] Regarding a character pattern management method in a character generation device, even if a character generation RAM reaches its capacity limit, characters corresponding to character pattern data newly read from an external storage medium are normally displayed. The purpose is to provide a character pattern management method that allows you to determine whether or not the desired character has been entered correctly. In the character pattern management method when the desired character is read out to the character generator and displayed on the display device after being registered in the character generation RAM, when the character generation RAM reaches its capacity limit, new characters cannot be added. When the pattern data is read from the external storage medium, the pattern data of the character already registered in the character generation RAM is deleted, and the pattern data of the read character is registered therein, thereby creating a new character. The configuration was designed to display correctly.

[Industrial application field]

The present invention relates to a character pattern management method in a character generation device, and more particularly to a character pattern management method when registering character pattern data from an external storage medium to a character generation RAM.

[Prior art]

FIG. 4 is a block diagram showing an outline of a character generating device used in computers and the like. The character generation ROM 61 stores pattern data and system programs for characters (kana, JIS level 1 kanji, etc.) that are standard for text expression, and the external storage medium 63 stores characters other than the standard characters. pattern data is stored. When the power is turned on, the initial program loader (IP
The system program stored in the external storage medium 63 is loaded into the program RAM 31 by the L-ROM) 30, and the system program is loaded into the program RAM 31 by the microprocessor (MPU) 60.
The system program performs display control as follows.

That is, when a certain reading is input from the keyboard 33 via the I10 control board 32 and a conversion key or a key similar thereto is pressed, the character code 40 of the character corresponding to the reading is as shown in FIG. The character type 35 is registered from the program RAM 31 to the address corresponding to the display position of the screen 11 in the screen buffer 24. Further, the character code 40 and the character type 35 are manually input to the character generator 27 via the register 26, and here, first, using the pattern data corresponding to the character code 40 registered in the character generation ROM 61, A character signal of the desired character is formed, and this character signal is further converted into a video signal by a parallel-to-serial converter 28, input to a display device 29, and displayed on a screen 11.
will be displayed.

On the other hand, if there is no target character pattern data in the character generation ROM 61, the target character pattern data is temporarily stored in the external storage medium 63 such as a floppy.
It is registered in the character generation RAM 62. In this way,
The pattern data registered in the character generation RAM 62 is displayed on the screen 11 of the display device 29 in the same manner as the pattern data registered in the character generation ROM 61 under the control of the character generation RAM management section 10, which will be explained later. Is displayed.

Once the pattern data of a certain character is registered in the character generation RAM 62 in this way, when the same character is to be displayed from now on, the system program will register the pattern data in the character generation RAM 62.
You can display the desired character just by accessing 2.

In the system program, there is R for character generation as shown above.
In order to manage the pattern data registered in the AM62, a character generation RAM management unit (hereinafter referred to as RAM
10 (referred to as a management department) is provided. The RAM management unit 10 has areas corresponding to the number of pattern data that can be registered simultaneously in the character generation RAM 62, and each area contains the character code 40 of each character displayed on the screen 11 and the character code 40 of each character displayed on the screen 11. The display number 51 is registered as a pair.

Thereby, it can be determined whether or not the character code 40 corresponding to the character inputted from the keyboard 33 is registered in the character generation RAM 62, and subsequent display processing etc. can be performed.

The display number 51 mentioned above is used to judge whether or not the corresponding character is displayed on the screen 11. For example, even if the character code 40 is registered in the RAM management unit IO, the display number 51 is If 5I is zero, a new character code 40 can be written in that area.

It should be noted that in the data in the drawing buffer 24 shown in FIG.
This data indicates whether the pattern is registered in any of the above, or whether it is the same specific pattern as will be described later. Further, the display timing of the display device 29 or the transmission timing of display data (pattern data, etc.) is determined by a CRT controller (CRTC) 25. Further, a multiplexer (MPX) 23 switches between the address from the address bus input to the screen buffer 24 and the address from the CRT controller 25.

In such a configuration and display procedure, the character generation RAM
If the conversion key or a key similar thereto is pressed while the character 62 has reached its capacity limit, new pattern data from the external storage medium 63 cannot be registered in the character generation RAM 62. In order to notify the operator of this, newly displayed characters are displayed in the same specific pattern (patterns that clearly indicate that they are not normal characters, such as solid black), and by erasing characters, etc. When the capacity of the RAM 62 becomes free, pattern data is registered at the empty address and displayed on the display device 29.

[Problem to be solved by the invention]

In the conventional method described above, when the character generation RAM 62 reaches its capacity limit, all the characters read out from the external storage medium 63 and newly displayed are displayed in the same specific pattern, so that the desired character cannot be input correctly. whether or not
In particular, when performing kana-kanji conversion, it was not possible to determine whether or not the conversion was correct.

This invention has been proposed in view of the above-mentioned conventional circumstances, and even if the character generation RAM 62 reaches its capacity limit, characters corresponding to pattern data newly read from the external storage medium 63 are normally displayed. To provide a character pattern management method capable of determining whether or not a target character has been input correctly, particularly whether a converted character is correct or incorrect during kana-kanji conversion.

[Means to solve the problem]

In order to solve the above problems, the present invention employs the following means. That is, referring to FIG. 4, after registering the character pattern data stored in the external storage medium 63 in the character generation RAM 62, the character pattern data is sequentially outputted to the character generator 27, and the desired character is displayed on the display device 29. In the character pattern management method when displaying, the above-mentioned character generation RAM 6
2 has reached its capacity limit, and when new character pattern data is read from the external storage medium 63,
By deleting the character pattern data already registered in the character generation RAM 62 and registering the newly read character pattern data therein, the display device 29
This is to ensure that the display is performed correctly.

The above method can be implemented by providing a character code management section 20 in which character codes 40 corresponding to pattern data are registered in the system program, and having the character code management section 20 manage the registration order.

[For production]

With reference to the principle explanatory diagram of FIG.
Characters A, B, and C are already displayed in 1, so naturally, the pattern data for the characters A, B, and C is R for character generation.
It is registered in AM62.

Here, it is assumed that the character generation RAM 62 has reached its capacity limit with the pattern data of the characters A, B, and C registered therein. In this state, the character generation RAM 6
2, for example, the letter A as shown in FIG. 1(a), it goes without saying that it can be displayed normally using the same procedure as before. At this time, the character generation RAM 62 is the same as before.
It is under the control of the Management Department IO, but furthermore,
It is also managed by the character code management unit 20 shown in FIG. 2, which will be explained in detail later, and in the character code management unit 20, when the character A is displayed, the registration order of the character code 40 is changed to that shown in FIG. 2(b). As in, it comes at the end.

Next, a character other than the above characters A, B, and C, which is not registered in the character generation ROM 61, is also a character generation R.
When a new character that has not yet been registered in AM62 is about to be displayed, the character code management unit 20 displays the first character in the registration order, that is, the character B, in a specific same pattern (black solid BL2), and displays the new character. Display the following information. This display is displayed in the character code management section 2, as will be explained in detail later.
This is possible by deleting the character code 40 corresponding to the character B in 0, and thereby the character generation RAM 6
Even if 2 is at the capacity limit, it can be determined whether or not the desired character has been correctly input. In addition, the above 1st
In the figure, black solid BLI represents a black solid corresponding to a character that has already been erased through the above procedure.

〔Example〕

In order to implement the above procedure, a RAM management section 10 similar to the conventional system program is provided, and a character code management section 20 is also provided.

As shown in FIG. 2 <a>, the character code management section 20 has areas corresponding to the number of pattern data that can be registered simultaneously in the character generation RAM 62, and each area has areas for each character displayed on the screen 11. character code 40 and character generation RAM 6
The address where each character pattern data of 2 is registered and the character occurrence number 41 which corresponds on a 1:1 basis are registered as a pair. Moreover, the registration order is the order in which they are used for display.

Above, the character occurrence number 41 is from the character code management section 2.
0, and when a character code 40 is stored in a certain area, the character code 40 is stored in the RAM using the character occurrence number 41 allocated to that area.
The pattern data is registered in the corresponding area of the management section 10 and in the corresponding address of the character generation RAM 62. Therefore, when the kana-kanji conversion key or a similar key on the keyboard 33 is pressed, new pattern data is transferred from the external storage medium 63 to the character generation RAM.
62, the character code 40 and character occurrence number 41 corresponding to that character are stored in the character code management section 2.
Of course, it is registered at the end of 0, but it is also registered when the pattern data of the character in the character generation RAM 62 is accessed in order to display the character that has already been displayed in the next position, or when the pattern data of the character is deleted. When the character code 40 and character occurrence number 41 of the corresponding character are accessed for the purpose, the character code 40 and character occurrence number 41 of the corresponding character are moved from the already placed position to the end of the character code management section 20, as shown in FIG. 2(b). It has become.

FIG. 3 is a flowchart showing the procedure of the present invention using the character code management unit 20 as described above and the conventional RAM management unit 10. When the Kana-Kanji conversion key or a key similar to it is pressed, first the character code 40 already managed in each area in the character code management section 20 is
It is determined whether or not the character code 40 of the character to be newly displayed is the same (Fl-F2. or F2:N-F
5: repeat to F2 via N). If the character code 40 of the character to be newly displayed in step F2 above has already been registered in the character code management section 20, (F2
:Y), as described above, the corresponding character code 40 and character occurrence number 41 in the character code management section 20 are moved to the position of the latest registered character (F21), and the character occurrence number 41 is read ( F22), the character occurrence number 41
The display number 51 of the area of the RAM management unit 10 corresponding to is increased by one (F23).

If the character code 40 of the character to be newly displayed in step F2 is not yet under the control of the character code management unit 20, the character code to be newly displayed in the unregistered area of the character code management unit 20 is 40 (F3:N-F16). Furthermore, RAM620 for character generation
Reads the character occurrence number 41, registers the character code 40 in the RAM management unit 10 corresponding to the character occurrence number 41, and sets the display number 51 to 1 (F18, F19),
Furthermore, the pattern data successively output from the external storage medium 63 is stored in the address corresponding to the character generation number 41 in the character generation RAM 62 (F20).

The judgments in steps F2 and F3 above are made for each area of the character code management section 20, and in the end, if a new character exceeds the capacity limit of the character code management section 20, that is, the capacity limit of the character generation RAM 62, and a new character is registered. Then (F5:Y), as described above (see Figure 2 (b))
The character code 40 and character occurrence number 41 located at the top position of the character code management section 20 are moved to the latest registered position (F6), and the character code 40 and character occurrence number 41 are read from the area (F6). F7, F8). Based on this character occurrence number 41, the display number 51 is also read out from the RAM management section 10 (F9). Then, based on the character code 40 read out as described above, the character code 40 in the same screen buffer 24 is searched, and its character type 3 is searched.
5 to the specific same pattern, and the display number 51 is decreased by one. This procedure is for the number of displays to be deleted: 5
This continues until 1 becomes zero (repetition of Fil to F15).

In this way, when the display number 51 in the character generation RAM 62 becomes zero, pattern data of a new character to be displayed can be registered in the target character generation number 41. Therefore, in the steps F16 to F20 described above, new characters are placed under the control of the RAM management unit IO and the character code management unit 20, and the character generation RAM
New character pattern data is registered in 62, thereby allowing normal display on the display device 29.

In the above, the data structure of the RAM management unit 10 is exactly the same as the conventional one, but the display number 51 is in steps F11 to F15.
In the data deletion process, the remaining number to be displayed as a specific identical pattern is also calculated. Therefore, the above Fit
- There is no need to compare the character code 40 registered in all addresses of the screen buffer 24 with the character code 40 of the character to be deleted in step F15, and the character code 40 will be deleted as soon as the displayed number 51 becomes zero. Work can be finished.

There are various means for restoring the characters expressed in the same specific pattern on the screen to their original normal state as described above, but since they are outside the scope of this invention, their explanation will be omitted here.

〔Effect of the invention〕

As explained above, the present invention, when the character generation RAM reaches its capacity limit, erases the first registered character pattern data and newly reads it from an external storage medium. Since the pattern data entered is registered, even if the character generation RAM is at its capacity limit, it is possible to check whether new characters have been entered correctly, especially whether kana-kanji conversion has been performed correctly. It can be performed.

FIG. 4 is a block diagram of the character generator, FIG. 5 is a data structure diagram of the RAM management section, and FIG. 6 is a data structure diagram of the screen buffer.

In the figure, 20...Character code management department 27...Character generator 29...Display device 40...Character code 62...RAM for character generation 63...External storage medium.

[Brief explanation of the drawing]

FIG. 1 is a diagram explaining the invention in detail, FIG. 2(a) is a data structure diagram of the character code management section used in the invention,
Figure 2 (mountain) is an operational diagram of the character code management unit, Figure 3 is a flowchart showing the procedure of this invention, (a) (b) 11: Screen: Screen Figure 2 shows the data structure of the code management unit used in the present invention. Figure 2 (a
) Operation explanatory diagram of the code management section Figure 2 (b) Funeral diagram

Claims (1)

[Scope of Claims] [1] After registering the character pattern data stored in the external storage medium (63) in the character generation RAM (62), it is read out to the character generator (27) and displayed on the display device ( 2
9), when the character generation RAM (62) reaches its capacity limit, new character pattern data is generated from the external storage medium (63). When read, it is already in the character generation RAM.
(62) A character pattern management method characterized in that a new character is displayed normally by deleting the pattern data of the character registered in the field and registering the pattern data of the read character therein. . [2] Character code management section (2) in which the character code (40) corresponding to the pattern data is registered in the system program.
0), and the character code management unit (20) manages the registration order of the character code, thereby deleting the character from the character pattern data corresponding to the character code (40) at the head of the order. Pattern management method.