JPH026097B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a character processing device for processing sentences.

[Description of the Prior Art and its Problems] Conventionally, there has been a character processing device that can input characters, etc. from a keyboard, create sentences using the input characters, and edit the sentences.

In such a character processing device, the number of characters input becomes large, and it may become impossible to display all of them at once on a display device such as a CRT.
Inevitably, only part of the sentence will be displayed, but there may be times when you want to display the beginning of the sentence on the screen. In this case, the beginning of the sentence must be displayed by using the screen roll-down key or the previous screen key many times, or the beginning of the sentence must be displayed by using the beginning of the sentence key.

[Means and effects for solving the problems] Another object of the present invention is to provide a character processing device that can display the beginning of a sentence without requiring multiple key operations.

Another object of the present invention is to provide a character processing device that can display the beginning of a sentence without providing a new key having an independent function, such as a sentence beginning key.

Another object of the present invention is to provide a display means for displaying information, an instruction means for instructing to display the beginning of an information area where a cursor is located on the display means, and a display means for responding to an instruction from the instruction means. When the cursor is located at a specific position on the display means, the screen is changed to display the beginning of the information area where the cursor is located, and when the cursor is not at a specific position, the cursor is moved to a specified position on the display means. An object of the present invention is to provide a character processing device comprising a control means for moving to a position.

Other objects of the present invention will become clear from the following description of embodiments with reference to the drawings.

[Example] Before describing an example according to the present invention, terms used in this example will first be explained.

1 Left margin code LMM Displayed as a '' mark on the CRT. Displays the leftmost possible input from the keyboard.

2 Right margin code RMM Displayed as a '' mark on the CRT. Displays the rightmost input possible from the keyboard.

Next, an outline of one embodiment according to the present invention will be explained.

The device shown in the embodiment includes a keyboard, a processing section, a display device, and a printer.

All operations are performed using the letter keys or function keys CIK on the keyboard shown in FIG.

First, all the states are initialized by the initialize key INK, and each function of this embodiment becomes executable.

By pressing the initialize key INK,
On the display device, there are left and right margin marks LMM,
RMM will be displayed and everything else will be cleared. The cursor CM is located in the second column of the top row,
It becomes possible to input characters, etc. from the keyboard. Characters and the like entered from the keyboard are entered at the position where the cursor CM is displayed on the display device. The cursor CM advances one by one in accordance with the input of characters, etc. from the keyboard. The cursor CM can be advanced one by one using the cursor key CK. The string that has been input is the print key.
By pressing PK, you can output to the printer. The input/output control described above can be easily realized using known techniques.

The operating methods for the functions of the present invention will be described below.

First, we will explain how to insert a row. cursor
By moving the CM to the left margin code LMM and pressing the insert key there, you can create a line consisting only of spaces immediately before the line where the cursor is located.

This situation will be explained using FIGS. 3a and 3b. Third
As shown in figure a, there are already multiple characters A, B, C, DEF,
Assume that GHI is input. Use the cursor keys to move the cursor CM to the left margin mark of the second line
When you move to LMM and press the insert key, a new blank line will appear between the first and second lines, and the following lines will be moved down one line each to the third line.
It will look like figure b.

Next, we will discuss how to delete lines. cursor
The line where the cursor is located can be deleted by moving the CM to the left margin mark LMM of the line you want to delete and pressing the delete key there.

This situation will be explained using FIGS. 4a and 4b. As shown in Figure 4a, if you want to delete the second line now, move the cursor CM to the left margin mark of the second line.
Move to LMM using the cursor keys. Then, by pressing the delete key, the second line disappears, and each of the following lines moves up one line, as shown in Figure 4b.
It will look like this.

Next, a method of changing the line pitch will be explained using FIGS. 5a, b, and c. Now, if you want to set the line pitch from the second line to the fourth line on the display screen to 5 mm,
Cursor CM to left margin mark LMM on second line
(Figure 5a). If you enter the number 5, 5 will be displayed in the left margin mark LMM, as shown in Figure 5b. Furthermore, in order to return the line pitch from the fourth line to the standard line pitch corresponding to the standard feed number of the printer, which will be described later, move the cursor CM to the left margin mark LMM of the fourth line and input the letter S. Now, only the second to fourth lines will have a line pitch of 5 mm, and the line pitches of the other lines will take the value of the standard line pitch.

Next, a method of specifying when printing adjacent upper and lower lines without gaps will be explained using FIGS. 6a, b, and c. A special pattern 〓|--| etc. has already been input in the 1st to 4th lines of FIG. 6a, but
When printing these, it is of course necessary to adjust the character pitch in order to connect all the symbols, but this will not be discussed here. To print the upper and lower lines concatenated, first press the left margin mark on the first line.
Move the cursor CM to the LMM (Figure 6a).
If you then input the letter L (L indicates to print without any gaps), the letter L will be displayed in the left margin mark LMM above the cursor CM, as shown in Figure 6b. With this, the character pattern will be printed in a connected manner from the first line to the last line without any vertical gaps. However, if you want to return to the standard line pitch from the 4th line onwards, use the left margin mark LMM for the 4th line.
Move the cursor to CM and enter the letter S.
Then, as shown in Figure 6c, the left margin mark of the 4th line
S is displayed in the LMM, and the fourth and subsequent lines have the standard line pitch.

Next, we will explain how to display the beginning of a sentence. The cursor CM moves to the top of the screen by first operating the screen top key HPK once in the input character string. Then press the top key on the screen again.
When you operate HPK, the text is displayed on the screen from the beginning. That is, if the cursor CM is placed at the top of the screen in advance, it is possible to display the text from the beginning just by operating the screen top key HPK once.

The document that has been input and edited above is output to the printer by pressing the print key.

FIG. 1 is a block diagram showing an embodiment of a character processing device according to the present invention. Each component will be explained below. The KB is a keyboard consisting of text input keys CIK (for example, a group of keys arranged on a JIS keyboard) and a group of function keys for realizing various functions of this device.

As shown in Figure 2, the above function keys include the following function keys: the insert key IK for instructing the insertion or deletion of characters or lines;
It consists of a delete key DK, a cursor key CK for moving the cursor on the CRT, an initialize key INK for instructing to start work, and a print key PK for instructing printing. Further cursor key CK
Contains the screen top key HPK to move the cursor CM to the top of the screen.

The keyboard KB has an encoder function, and the information of the pressed keys is read by the processing unit CPU, which will be described later.

Returning to FIG. 1, CR is a cursor register.
The cursor register is controlled by the processing unit CPU (described later).
Able to read and write the contents of CR. The CRT controller CRTC, which will be described later, has a function of displaying a cursor at a position on the display device CRT corresponding to the address stored here. The information stored in the cursor register CR is a serial number from 1 to 40, and the CRT controller CRTC is
This serial number will be changed to the number of lines and digits and displayed.

DBuF is a data buffer, which is a memory for storing text information input from the keyboard KB, and the information stored here is displayed on the display device CRT by the CRT controller CRTC, which will be described later. Used as refresh memory for CRT display devices. This DBuF can be freely read and written by the CPU.

Data buffer DBuF is 8×10W (W; Word)
(1W; 1 character), of which 8 x 5W
Only the following shall be displayed on the display device CRT.

The display of characters, etc. is 8 characters horizontally and 5 lines vertically.
They are correlated in order with the contents of 40 consecutive words out of the 80 words of the data buffer DBuF.
Furthermore, the data buffers DBuF are numbered sequentially from 1 to 80, with the first data being DBuF(1) and the next data being numbered sequentially from 1 to 80.
DBuF(2), and generally the Nth data is DBuF
Expressed as (N). DR is a display register that instructs from which position in the data buffer DBuF to display on the CRT.As an example, when displaying the following 40 words from the 20th data, that is, DBuF (20), the DR It would be a good idea to set the value to 20. The CRT controller CRTC displays the contents of 40 consecutive words on the CRT from the contents of the data buffer DBuF corresponding to the values stored here.

CRTC is a data buffer using a CRT controller.
Control is performed to display characters, etc. on the display device CRT according to the information stored in the DBuF, and to display a cursor on the display device CRT according to the information stored in the cursor register CR.

The CRT controller CRTC will be explained in more detail using FIG. 15. FIG. 15 is a block diagram illustrating a method of sequentially displaying 40 characters of information in the data buffer DBuF on a display device CRT using the value stored in the display register DR as a bias value. (However, since the method of displaying the cursor is well known, it will be omitted.) By inputting the timing signal H from the display device CRT, the character number D to be displayed on the display device CRT (in this example, 0 to
Value up to 39) and row number F of the character to be displayed
A controller CONT outputs various timing signals (not shown) for display, and a character number D output from the controller.
and output signal A from display register DR.
It consists of an adder circuit ADDR that performs addition with , and a shift register SR that converts parallel pattern information E output from character generator CG into a serial signal G.

The display number A indicates the first address in the data buffer of the character to be displayed on the display device CRT, and the output signal B of the adder circuit ADDR is the sum of that value and the character number D.
indicates the address within the data buffer of the character to be displayed on the display device CRT at that time. The output signal C of the data buffer DBuF, which is output as a result of accessing the output signal B as an address, becomes the code signal of the character to be displayed on the display device CRT at that time. The character generator CG receives the code signal C and the low number F from the controller CONT as input signals, and outputs a character pattern signal E (parallel information) of the corresponding low number of the corresponding character. The character pattern information E is converted into a serial signal G via the shift register SR and output to the display device CRT, so that the corresponding character is displayed.

When displaying characters, etc., character codes are changed into character patterns with reference to a character generator CG, which will be described later.

Returning to Figure 1, CRT is a display device,
Characters and cursor can be displayed using the CRT controller CRTC.

CG is a character generator and is used to display characters on a display device CRT and output characters to a printer PRT. CRT controller
CRTC and printer controller (described later)
Used by PRTC.

PRTC is a printer controller, converts character code information from a processing unit CPU (described later) into a pattern by referring to a character generator CG, and outputs the pattern to the printer PRT.

However, the left margin mark LMM and right margin mark RMM are not printed.

The printer controller PRTC also has the function of converting a ruled line code into a ruled line pattern and outputting it.

PRT is a printer which includes a thermal head 101, a carriage 102, a carriage drive belt 103, a carriage guide 104, as shown in FIG. 7a.
It consists of a printer mechanical section including a printing paper 105, a platen 106, a printing paper guide 108, etc., and a known control section (not shown) that controls these. The thermal head 101 consists of a 9×1 dot thermal element. In printing, it is possible to print a 9×7 dot matrix character pattern as shown in FIG. 7b.

The signal sent from the microprocessor CPU when feeding the printer is set so that the signal is fed by 1 mm per transmission of line feed information. This setting is due to restrictions imposed by the mechanical part of the printer.

Returning to FIG. 1, PHS is a head detection device of the printer, and is set in the carriage 102. The details will be explained using FIGS. 8a, b, and c. In FIG. 8a, 201 is a support plate that supports the head. 202 is the contact point with the head,
Connected to power. 203 is also connected to a detection circuit, which will be described later, through a contact point with the head. 204 is also a contact point with the head and is grounded. 205 is a detection circuit which includes an address decoder and a bus driver. AB, DB, and CB are address buses, data buses, and control buses, which will be described later. 206 is a head with vertical 3 mm letters, and 208 is a contact point with the head support plate. 20
7 is a head with vertical 4 mm letters, and 209 is a contact point with the head support plate. 210 is a screw and 211 is a screw hole. When the 10-point head shown in FIG. 8B is set on the head support plate 201, the contacts 203 and 204 are electrically connected, and the contact 203 is grounded.

Also, the 12-point head shown in Figure 8c is
When set on the head support plate 01, contacts 202 and 203 are electrically connected, and contact 203 is connected to the power source. That is, since the potential of the contact 203 changes by switching the head, the detection circuit 20
The signal given to 5 also changes. Which head was set by this will be explained later.
You can find out from the CPU.

The CPU is a microprocessor that performs calculations, logical judgments, etc. Controls buses AB, CB, and DB, which will be described later.

AB is an address bus that transfers signals indicating the control target.

CB is a control bus that applies control signals to various control targets.

DB is a data bus that transfers various data.

The ROM is a control memory that stores the control means shown in FIG. 9 and subsequent figures, the printer's standard feed number SN, etc.

The RAM is a random access memory and is used for temporary storage of various data such as the insertion mode flag INFG, data number DN, feed number FN, etc. The insert mode flag INFG is automatically cleared to 0 when the power is turned on, and when the insert key is pressed after that, it has a value of 1, and when the insert mode is entered and a character is input, the character is inserted at the current cursor position. It will happen. When you press the insert key again, the insert mode flag INFG is cleared to 0, and from now on, even if you enter a character, it will only overwrite the character at the current cursor.

Next, the operation of this embodiment will be explained.

In this example, the insertion flag is automatically set when the power is turned on.
INFG is cleared to 0 and keyboard processing is configured to operate.

Each process will be specifically explained below with reference to the flowcharts from FIG. 9 onwards.

First, when a key on the keyboard KB is operated, the operated key is determined according to the following order, processing is performed for each key, and then the system enters a key wait state.

In step KB1, determine whether there is an input from the keyboard KB. If there is no input, the process returns to waiting for a key, and if there is input, the program moves to step KB2 and takes in the data from the keyboard KB.

In step KB3, it is determined whether the captured data is the cursor key CK. If YES, perform the cursor movement processing in step KB4, and if NO, proceed to the next step KB5.

In step KB4, the input cursor key CK
Move the cursor CM on the CRT screen according to the instructions.
When this process is completed, the process returns to waiting for a key.

In step KB5, it is determined whether or not the character key CIK has been operated. If YES, the process moves to step KB6 and displays the character input at the position of the cursor CM. When this process is completed, the process returns to waiting for key input. If step KB5 is NO, step KB7
Proceed to and determine whether the insert key IK was operated,
If YES, proceed to step KB8, perform insertion processing, and then proceed to wait for a key. If NO, next step
Moving to KB9, it is determined whether or not the deletion key DK has been operated. If YES, the program moves to step KB10, performs deletion processing, and then waits for a key. If the answer is NO, the process moves to the next step KB11, and it is determined whether or not the print key PK has been operated. If YES, step
Move to KB12 and print the created text. When this process is completed, the process goes to wait for a key. If NO, move to step KB15.

Next step KB4, KB6, KB8,
The details of KB10 and KB12 will be explained.

First, the process of step KB4 will be explained with reference to the flowchart of FIG. (This is cursor key input processing.) Step 4.1 Is the first key on the screen HPK? Step 4.2 Is the current cursor position at the top of the screen? Step 4.3 Move the cursor Step 4.4 Display the text on the screen from the beginning.
That is, the value of the display register DR is set to 1.

Step 4.5 Display the cursor commercial at the top of the screen. That is, the value of the cursor register CR is set to 1.

Next, the processing of step KB6 will be explained with reference to FIG. (This is character key input processing.) Step 6.1 Is the current cursor position at the left margin mark LMM? Step 6.2 The input character key code is 0,
1, 2, 3, 4, 5, 6, 7, 8, 9, S, L
Is it either? Step 6.3 Save the new character code corresponding to the input character key code to the data buffer DBuF.
(CR). For example, if the number 1 is input now, 1 will be displayed on the screen. For that purpose, use the character code 1 as a data buffer.
It is a good idea to store it in DBuF (CR). Here, the conversion from the character code 1 to the character code 1 can be easily obtained by mathematical processing.

Step 6.4 Is the insertion flag INFG 0? Step 6.5 Store the input character code to the data buffer DBuF (CR).

Step 6.6 The input character is inserted at the current cursor position. That is, the contents of the data buffer DBuF corresponding to the current cursor position are shifted backward one word at a time until the last data is reached. However, the positions of the left margin code and right margin code will not change. As a result, the contents of the last data buffer DBuF (79) containing the character word will be erased.

Next, insert processing step KB8 will be explained with reference to FIG.

Step 8.1 Current cursor is left margin mark
Is it in the LMM position? Step 8.2 Move all the contents of the data buffer DBuF after the current cursor position to the backward data buffer DBuF by 8 words each, and add a left margin mark code and a space code of 6 to the 8 words from the data buffer DBuF (CR) corresponding to the current cursor position. Word and right margin mark code are stored in this order. By the above procedure, one line consisting of only the left margin mark LMM and right margin mark RMM will be inserted into the current cursor line, and subsequent lines will be displayed so as to be shifted downward one line at a time. Also, by this operation, data that protrudes from the data buffer DBuF will be automatically deleted.

Step 8.3 Is the insertion flag INFG 0? Step 8.4 Set the insertion flag INFG to 1.

Step 8.5 Clear the insertion flag INFG to 0.

Next, the deletion key input processing step KB10 will be explained with reference to FIG.

Step 10.1 Current cursor is left margin mark
Is it in the LMM position? Step 10.2 Delete the line where the current cursor is located. In other words, the contents subsequent to the data buffer DBuF (CR+8) at the beginning of the line following the above line are each shifted forward by 8 words. accordingly
Transfer DBuF(CR+8) to DBuF(CR), then
The operation of moving DBuF (CR+9) to DBuF (CR+1) is performed until the last data DBuF (80).
Also, a space code is inserted into the contents of the 8 words from the last data DBuF (72) to the data buffer DBuF (80).

Step 10.3 Delete the character where the current cursor is located, leave the data buffer DBuF containing the right margin mark RMM and left margin mark LMM as is, and move all other contents one word back. shift. The last data buffer that contained a character word is replaced with a space code.

Step KB12 of the print process will be explained with reference to FIG. 14a.

Step 12.1 Set data number DN to 1.

Step 12.2 Is the content of the data buffer DBuF (DN) corresponding to the data number DN a space code? Step 12.3 Print 8 consecutive words, ie, 1 line, in the data buffer DBuF (DN).

Step 12.4 Data buffer DBuF (DN) is L
Is it the code? Step 12.5 The type of head set in the printer carriage is determined from the output of the detector 205, and the vertical size of the character corresponding to that head is set to the feed number FN.

Step 12.6 Data buffer DBuF (DN) is S
Is it the code? Step 12.7 Set standard feed number SN to feed number FN.

Step 12.8 Data buffer DBuF (DN) is 0, 1, 2, 3, 4, 5, 6, 7,
Is it one of the 8 or 9 codes? Step 12.9 Enter the numerical values displayed in the special character codes 0, 1,...9 as the feed number FN.
Set to .

Step 12.10 Feed the printer as many times as feed number FN. The printer's feed amount at one time is 1mm, so it will be FNmm feed. Furthermore, the data number DN is 8
and sets the number corresponding to the first character of the next line. After completing this process, repeat the steps.
Return to 12.2.

In step 12.5 described above, further Figure 14b
This will be explained in detail with reference to .

Step 12.5.1 The vertical size of the text on the head set in the printer cartridge is 3 mm.
mosquito? Step 12.5.2 Set feed number FN to 3.

Step 12.5.3 Set feed number FN to 4.

Control as described above is performed for each operation key.

[Effects of the Invention] If the cursor is not at the beginning of the text in the input character string, by operating the screen top key HPK once, cursor processing is started and the cursor CM is moved to the top of the screen. Furthermore, if you operate the screen start key HPK again, the screen will be displayed from the beginning of the text due to cursor processing.

Furthermore, if the cursor CM is placed at the top of the screen in advance, it is possible to display the text from the beginning just by operating the screen top key HPK once.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention. FIG. 2 is a detailed diagram of the keyboard KB shown in FIG. 1. FIGS. 3a and 3b are diagrams illustrating row insertion. FIGS. 4a and 4b are diagrams illustrating line deletion. Figure 5 a, b, c
is a diagram explaining the specification of line pitch. Figure 6 a, b,
c is a diagram illustrating the specification of line pitch according to character size. Figure 7a is the printer in Figure 1.
Detailed diagram of PRT. FIG. 7b is a diagram showing an example of the dot structure of characters printed by the printer. FIG. 8a is a detailed view of the carriage in the printer. Figures 8b and 8c are detailed views of the head. FIG. 9 is a diagram showing a control procedure showing key processing. 10th
The figure shows cursor keys. FIG. 11 is a diagram showing character key processing. FIG. 12 is a diagram showing insert key processing. FIG. 13 is a diagram showing deletion key processing. FIGS. 14a and 14b are diagrams showing print processing. Figure 15 is the first
Detailed view of the vicinity of the CRT controller CRTC in the figure. RAM...memory, DR...display register, CR...cursor register.

Claims (1)

[Scope of Claims] 1. Storage means for storing text information; Display means for displaying part of the text information stored in the storage means; Position specification for specifying a position with a cursor on the display screen of the display means. means, an instructing means, a determining means for determining the position of a cursor on a display screen of the display means, and in response to an instruction from the instructing means, the determining means moves the cursor to the top position of the display screen of the display means. When it is determined that the cursor exists at the beginning of the display screen, the part of the text information displayed on the display screen is changed to the beginning part of the text information, and when it is determined that the cursor is not at the beginning of the display screen, the part of the text information displayed on the display screen is changed and displayed. A character processing device comprising a control means for moving a cursor to the top position of a display screen and displaying the result.