JPS6147985A - Character processor - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Field] The present invention relates to a character processing device that displays and edits input characters, and particularly relates to a character processing device that has a tab setting function. A display that can only display strings in rows
There was a character processing device that had a Jt location.

In such a character processing device, when inputting characters using the tab function, it is common to set tabs in advance, then specify tab execution and continue inputting character strings. . At that time, a tab mark was displayed on the display screen to indicate that the character string was input immediately after the tab was executed at the beginning of the character string that was input after the tab execution was specified. In this case, it is difficult to immediately check on the display screen the information about which column from the left margin the tab is set, and it is not easy to edit the string entered using the tab later. It had the following drawback.

〔the purpose〕

SUMMARY OF THE INVENTION In view of the above, an object of the present invention is to provide a character processing device that enables efficient editing of character strings by easily confirming the position where a tab is executed on one display screen.

〔explanation〕

An embodiment of the present invention will be described in detail below with reference to the drawings.

FIG. 1 shows a configuration showing one embodiment of the present invention, in which the CPU is a microprocessor that performs logical judgments and the like. BL is a pass line that serves as an address bus for specifying the address of each input/output memory, a bidirectional data bus used for various data transfers, read/write of each memory, accepts interconnected data, and handles data set. It consists of control lines used to transmit timing and other information. KB is a keyboard through which the operator inputs various characters or gives commands to the device.

KEC is a keyboard controller and keyboard KE
It encodes the data input from the EL and sends an interlaced signal to the pass line EL. The LCD uses a display controller to store character codes to be displayed in the refresh memory RM, and uses a character generator CG to generate patterns using the character codes stored in the refresh memory RM on the r-cD, a liquid crystal display device that can display alphanumeric characters, kana, kanji, etc. It is used to control one display section. The LCD is a liquid crystal display device, and in this embodiment, it is assumed that characters and control symbols can be displayed over 20 columns per row. CG is a character generator and stores character patterns. The ROM is a read-only memory, and the control means shown in the flowcharts of FIGS. 6 and 7 have been confirmed.

RAM is a random access memory and is used for temporary storage of various data. SB is a sentence buffer in which characters and control symbol codes input from the keyboard are sequentially stored. In this embodiment, it is IWXloo.

DP is the display start position pointer and the sentence buffer SH
This is a pointer indicating the beginning of the part to be displayed. (
(Takes a value from 0 to 81) CR is a cursor register that indicates which part of I/CD the cursor is located in. It takes a value of 1 when the cursor is at the left end of the display screen and 20 when it is at the right end) HR is The hair position register stores a value indicating the fold position of the current print head position counting from the left margin. TT is a tab table that stores the number of digits in which tabs are set. The tab table TT is shown in FIG. 4. In this embodiment, the tab table TT consists of 3 words (l word = 16 bits), where 16 bits x 3 words = 48 bits correspond to each digit. If the tab is not set, the content of the corresponding bit is 0", and if the tab is set, the content of the corresponding bit is "1°°9. For example, the 5th digit from the left margin. If a tab is set in the 10th column, the contents of the 5th bit and 10th bit from the beginning of the tab table will be 1'', and the other contents will be 0.
becomes. TP is a tab button table and stores a code corresponding to the number of digits in which a tab is executed. This is shown in 0 in FIG. 5. For example, when tabs are set at the 5th and 10th FT as described above, and input from the tab position at the 5th digit is specified, code α+4 is assigned.

The display patterns corresponding to these codes are shown in the right column of Fig. 5. These patterns are generated by character generator C.
It is stored in G. PT is a pointer indicating the address in the sentence buffer where the tab code is set.

Figure 2 shows a schematic external view of the keyboard KB.

GK is a group of character keys, consisting of alphanumeric characters, special characters, kana characters, kanji keys, etc. FK is a group of functions and balloons, FKI is a cursor right movement key, FK2 is a cursor right movement key, FK3 is a tab set key, and FK4 is a tab execution key.

FK5 is a printer head left movement key, FK6 is a printer head right movement key, and FK7 is a print start key. Furthermore, in this embodiment, the number of characters that can be printed in one line is up to 48 characters.

Tab input processing according to the present invention configured as described above will be explained. Character strings input from the keyboard are input sequentially from the left end of the display screen as shown in FIG. 3(1). If 16 or more characters are entered, they will be scrolled and displayed. In Figure 3 (1), CM represents a cursor, and CR is a control symbol representing a line feed.0 When creating a document, as shown in Figure 3 (2), a specific digit (for example, the third line of the second line) and 8th line), use the tab function to input characters. In this embodiment, 3 and 8 shown in FIG. 3 (1) are control symbols representing tabs, and the 3rd line and This indicates that printing will start from the 8th line.

Next, the tab setting method and execution method will be described.

To set a tab, the operator moves the printer head to the desired position using the printer head movement keys FK5 and FK6 and presses the tab set key FK3.0For example, in the example shown in FIG. Move to the third line using movement keys FK5 and FK6. It is assumed that the printer head is moved in units of one digit to be printed using the printer head movement keys FK5 and FK6. After moving, the tab is set on the third fold by pressing the tab set key FK3. bl and move the printer head again to the 8th line using the same operation and press the tab set key FK3 Complete the tab setting with 0 or more Finished entering characters? Enter &CR (career return - line feed) to start inputting the characters on the second line. Here, I want to start inputting the second line from the third line, so press the tab execution key FK
Press 4. At this point, a tab mark 3 is displayed on the display screen and the screen waits for the next character to be input. So rQJ rl
(I want to input the three characters J riJ and then start inputting from the 8th line, so I press the tab execution key FK4 again.

Then, by continuing to input the desired characters, a display screen as shown in Figure 3 (1) is obtained. By pressing the print key FK7 next, the screen shown in Figure 3 (2) is displayed. You can get the best printing results.

The above operation will be further explained in detail with reference to the drawings.

FIG. 6 is a flowchart showing head movement processing.

FIG. 6(1) is a diagram showing head right movement processing.

FIG. 6(2) is a diagram showing head left movement processing. Here, it is assumed that after the power is turned on, the head is set on the left margin and l is set in the head position register HR.

When the head right movement key FK6 is pressed, the processing from step 7.1.1 is executed.

In step 7.1.1, the value of the head position register HR is compared with the number of digits (48) of the right margin, and if the value of HR is small, the process goes to step 7.1.2, otherwise the process returns. In step 7.1.2, a command is sent to the printer controller PRC to move the head one digit to the right. The PRC controls the printer PR according to this command and the printer head moves to the window by one digit.

In step 7.1.3, the value of the head position register HR is incremented by 1 and the process returns.

When the head left movement key FK5 is pressed, the processing from step 7.2.1 is executed.

In step 7.2.1, the value of the head position register HR is compared with the number of digits (1) of the left margin, and if the value of HR is large, the process goes to step 7.2.1; otherwise, the process returns. In step 7.2.2 the printer controller PR
Sends a command to move the head one digit to the left to C. The PRC controls the printer PR according to this command and the printer head moves to the window by one digit.

In steps 7 and 2.3, the head position register HR is decremented by 1 and the process returns.

Next, the tab set process is executed by pressing the tab set key FK3. That is, the program returns after setting the contents of the bits of the tab table TT corresponding to the value of the head position register HR to 1". It is assumed that the tab table TT is cleared after the power is turned on and contains all "0"s.

Next, the tab execution process will be explained with reference to FIG.

The tab execution process is performed according to the following steps when the tab execution key FK4 is pressed.

In step 8.1, search the sentence buffer SB from the beginning to find the end address of the input character string. Next, go to steps 8 and 2 aV. In step 8.2, search the sentence buffer SB address where the tab code will be placed. This is the process of setting the search pointer FT. Here, the result of the search in step 8.1 is sentence 87ASB.
If no character has been input, set the relative address O from sentence buffer sB to the two pointers and proceed to step 8.3. Otherwise, enter the last character found in step 8.1. If the character is a tab code, the tab execution process ends; if not, the end address +1 obtained in step 8.1 is stored in the pointer PT, and the process proceeds to step 8.3.

Step 8.3 is a process to find out what digit, counting from the left margin, the position of pointer FT set in step 8.2 is. (new line)
-F- Or search all the way to the beginning and use the relative position from there to find out what digit the pointer PT indicates from the left margin.0 Next, proceed to step 8.4.In step 8.4, first, the tab table TT is searched, and if no tab is set at all, the tab execution process is terminated. If a tab is set, compare the value of the tab digit set in the tab teaser TT with the number of digits obtained in steps 8 and 3, and check whether it is greater than the number of digits obtained in step I 8.3. Or a tab table TT with a smaller number of equal digits
The value of is set as the tab execution digit, and the process then proceeds to step 8.4. If the digit of the above condition is not set in the tab table TT, the tab execution processing is terminated.

In step 8.5, the code corresponding to the tab execution digit obtained in step 8.4 is obtained by referring to the tab button table TP, and the code corresponding to the tab execution digit obtained in step 8.4 is obtained in step 8.
Insert the pointer FT obtained in step 2 into the position of 0. Next, proceed to step 8.6. In step 8.6, put the value 1 into the cursor register CR to move the cursor to the next position where the tab code was input. Proceed to step 8.7.

In step 8.7, the value of the pointer PT obtained in step 8.2 is stored in the display start position pointer @DP so that the tab code position is at the left end of the display screen, and the display process is performed and the tab execution process is ended. do.

Regarding the m-specific processing to obtain the print result shown in FIG. 4 (2) for the tab code set as above, for example, when a tab code is detected, the tab button table TP is referred to and the code is This can be easily realized by replacing the number of digits corresponding to the number of digits with spaces.

[Other Examples]

In addition, in this embodiment, regarding the specification of the setting position of the tab,
Although the digits are designated by moving the printer head, other methods may be used, such as inputting the number of S digits from the keyboard.

Further, in this embodiment, the display screen is a one-line display device, but even if the display screen is a display device that can display multiple lines, such as a CRT display, the indentation setting digit can be confirmed at a glance, so the gist of the present invention is not impaired. do not have.

〔effect〕

As described above, according to the present invention, the tab execution position can be easily confirmed on both sides of the display, making it possible to efficiently create documents.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the configuration of the character processing device of the present invention, and FIG. 2 is a schematic external view of the keyboard KB shown in FIG. 1. FIG. 3(1) is a diagram showing a specific example of a part of a display device or a sentence buffer corresponding thereto. FIG. 3(2) is a diagram showing a specific example of the print result corresponding to FIG. 3(1), and FIG. 4 is a diagram showing a specific example of the tab table TT. FIG. 5 is an explanatory diagram illustrating the tab pattern table TP. FIG. 6 is a diagram showing a control procedure for printer head movement processing. FIG. 7 is a flowchart showing the control procedure for tab execution processing. CPU... Microprocessor BL...
・ Pass line WBC... Keyboard controller KB...
・Keyboard LCD...Display controller LCD
... Display device RM ... Refresh memory CG ...
・Character generator ROM...Control memory RAM...Random access memory SB
... Sentence buffer DP ... Display position start pointer CR ... Cursor register HR ... Head position register TT ... Tab table TP ... Tab button table PRC ...
Printer controller PR... Printer criminal Canon Co., Ltd. Figure 6 (7) (Z)

Claims (1)

[Claims] an input means for inputting character data; a storage means for storing data input from the input means; a display means for displaying data stored in the storage means; a tab setting instruction means for instructing tab settings; A tab is set by a tab position specifying means for specifying a setting position of the tab, a tab execution means for instructing execution of a tab, a tab is set by the tab setting instruction means, and a tab is set by the tab position specifying means, and a tab is set by the tab execution means. A character processing device characterized in that, when an instruction to execute a tab is given, a tab code symbol having tab function information and tab position information corresponding to the set tab position is displayed on the display means.