JPS61110264A - Character processor - Google Patents

Abstract

PURPOSE:To clear a misoperated line and move a cursor to the leading edge of the line after processing misoperation when the misoperation takes place, by providing an RAM equipped with a storing area line memory, video RAM, etc. CONSTITUTION:When a 'HELP' key is again depressed after misoperation takes place, an operating procedure is displayed by depressing the 'HELP' key, and the misoperation is processed, the line on which a cursor is positioned is erased and the next line of the inputting document is reproduced on the 25th line. In other words, simultaneously with the 'HELP' key depression, the character string of the line (24th line) on which the cursor is positioned is transferred to and stored in a storing area line memory SAVE2 of an RAM. Accordingly, all of the line of a video RAM VRAM on which the cursor is positioned is erased and the line of a displaying picture on which the cursor is positioned becomes an empty line and the cursor is moved to the leading edge of the empty line. Therefore, succeeding operations can be made easily.

Description

[Detailed Description of the Invention] [Description of the Prior Art] Conventionally, most word processors have a HELP function.
There was a function to display operating procedures or function explanations on a CRT display in response to the press of a specific key. The ``HELP function 1'' described above is one in which a pre-prepared explanatory text is displayed from the beginning in response to the press of a specific key, or in response to the press of a specific key followed by the press of a second specific key. There is a system that displays explanations of each function or operation method on a CRT display.However, the above system's "HELP!" Function 1 is simply an electronic display of the operations handbook. This conventional technique will be specifically explained below. As shown in Figure 1, a word processor has a keyboard, a processing unit floppy disk, and a C
The keyboard usually has the same alphanumeric keys as a typewriter keyboard, as well as cursor keys and function keys (such as "CENTER") specific to word processors, as shown in Figure 2. be. Figure 3 shows H according to the prior art related to the present invention.
This is a diagram showing the ELP function, and shows a method of displaying a large explanatory text or operation method from the beginning on the CRT display in response to pressing the key "HELP".

Therefore, the information that had been displayed until then disappeared. In addition, Figure 4 also shows 'HELP' by the prior art, similar to Figure 3.
In response to the press of the key "HE L P", a large explanatory text similar to that shown in Figure 3 is displayed from the beginning, and then, in response to the press of the key "CENTER", This figure shows a method of skipping the explanatory text and displaying the explanatory text or operating instructions regarding the centering function.Either of the methods shown in Figs. It only displays a large explanatory text or operating instructions from the beginning. Therefore, when an operator is operating a word processor, it is not the 'HELP4m function' that suits the situation, and he wants to use the HELP function. , the operation is always forced to be interrupted once for the HELP function. Furthermore, due to an operational error, I had to re-enter the string (!l).

〔the purpose〕

An object of the present invention is to provide a character processing device that clears the erroneously operated line and moves the cursor to the beginning of the line after correcting the erroneous operation when an erroneous operation is performed.

[Detailed explanation]

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

FIG. 5 is a diagram to clarify the application of the present invention, that is, a word processor, and in the figure, CRT is a CRT display device, BDY is a device incorporating a processing device and a flop disk drive, etc., FDD-A, FDD-B.
1 is a floppy disk drive device capable of reading and writing floppy disks, AL is a piezoelectric buzzer that generates an electronic sound, KBD is a keyboard device described above in FIG. 2, and PRT is a printing device. As is clear from FIG. 5, the keyboard and printer are connected to each other via cables from connector ICNT1 and connector 2CNT2. Therefore, the operator must use the CRT display device McRT.
The configuration is suitable for inputting character strings etc. from the keyboard KBD while looking at the screen, storing the resulting document on a floppy disk, and printing it.

Now, FIG. 6 specifically shows the inside of the apparatus shown in FIG. 5. CPU is a microprocessor, RAM
is a random access memory, and a document memory SM stores created documents and various a-clarifications and operation methods in codes;
A program memory MPM, an error information storage register ERRCD that stores error information, and a line memory l5 that stores data on the 25th line of the CRT display.
AVE1. The ROM with the line memory 2SAVE that stores the data of the cursor row is a read-only memory, and the FD
C is floppy disk control Cf-ra, CRTC is C
The RT display controller has a row register LR, a column register CR & which indicates the cursor position! , VR
AM is a video RAM, KBC is a keyboard controller, WART is an asynchronous communication controller, and TIMER is a programmable timer. Also includes floppy disk drive FDD, CRT display CRT, keyboard KBD, printer PRT, buzzer AL, connector I
cNTl and connector 2ONT2 are the same as #i described in FIG. Further, each device shown in FIG. 6 is connected by a common bus CBUS. In other words, each device is controlled by the microprocessor CPU. More specifically, to explain the operation of each device, when the power is turned on, the microprocessor CPU operates according to a program fixedly stored in the read-on memory ROM, floppy disk controller FDC, CRT display controller CRTC, and random access memory R.
Initialize AM, video RAM VRAM, keyboard controller KBC1 asynchronous communication controller UART, and programmable timer TIMER. In other words, it creates the appropriate conditions for the device to operate. After that, the programs necessary for word processing processing from the floppy disk drive AFDD-A and FIGS. 7, 1O, and 11 according to the embodiment of the present invention are shown.

Figure 12, 14th cause, 15th cause, Figure 16, 17r1
Read the program shown in the 7σ-chart of 4 and write it to the program memory PM in the random access memory RAM.
Store in. In this state, the flow of control is inevitably transferred from the program in the read-on memory ROM to the program stored in the program memory PM in the random access memory RAM. As is clear here, the capacity of the random access memory RAM is the read-on memory ROM.
The program memory PM is required to have a capacity corresponding to the program size required for word processing, and is, for example, 128 bytes. The read-on memory ROM requires a capacity corresponding to the size of the program required to start up the word processor, for example 8 bytes.

The word processor program stored in the program memory PM is used to control each device as needed. The floppy disk controller FDC receives instructions from the microprocessor and transfers or receives data to the floppy disk drive FDD.The CRT display controller CRTC includes a character generator storing character fonts and receives instructions from the microprocessor CPυ. Video RAM VRAM and V with reference to text memory SM;
A functions to display characters or figures on the CRT display ICRT. The video RAM VRAM has a one-to-one correspondence with the dots of the CRT display, and can store bit information.Since the CRT display CRT has 640 dots horizontally and 400 dots vertically,
400 or 256 bits (32 bytes) are required. Furthermore, since the video RAM VRAM is directly connected to the common bus CBUS, each bit can be arbitrarily manipulated by the microprocessor CPU.

This means that any butter/
It is convenient for controlling the

Keyboard controller KBC and microprocessor C
It can be controlled directly from the PU, and can inform the microprocessor CPυ which key is pressed. The asynchronous communication controller UART is also controlled by the microprocessor CPU and is used to send printing information to the printer PRT. Programmable tie +/
-TIMMER can also be controlled from the microprocessor CPU and can be monitored at any time. Utilizing this fact, the ringing time of the buzzer AL is also controlled.

Now, the present invention utilizes the above-mentioned hardware more effectively. Therefore, the following explanation will be given based on an example of an operation performed by an operator. FIG. 7 is a flowchart showing the correct operating procedure for the centering function according to this embodiment. The centering function here is a function that automatically positions the character string in the middle of the apex of the left margin and right margin. First, in step 7.1, position the cursor on a blank line (a line with no characters) and press the key "CENTE".
Press “R”.

At this time, a centering function mark is displayed on the line where the cursor is located, indicating that the following character strings will be centered.Next, input the character string to be centered in slap 7.2, and press '' in step 7.3. RETU
When you press "RN", the character string will be positioned and displayed in the middle of the left and right margins. This is the correct operating procedure.

However, if the input includes an incorrect operation procedure as shown in FIG. 8, the following will occur in the embodiment of the present invention. First, as an operational background, assume that after completing input for one page, the operator realizes that the character string to be centered must be inserted backwards or upwards.

Then, in step 8.1, the operator positions the cursor at the desired position using the cursor movement keys and presses the ``I'' key.
Press "NS" and instruct to insert a blank line. Then, a blank line will be created.

It is now possible to insert a character string, and in step 8.2 the character string to be centered is first entered without accidentally pressing the key "CENTER". CRT at this time
The display CRT is displayed as shown in Figure 9 (a). In Figure 0, the character string that has already been input is displayed after "WORD", and the character string "CENTERING" is displayed.
″ is the character string you just entered. Therefore, the cursor is the character ″
It is positioned immediately after the character string ``NE''.
XT" and below shows the last line on the CRT display.The discussion will get a little more detailed here, but in this example, C
As mentioned above, the number of dots displayed on the RT display is 640×400, that is, 256,000 dots, and the characters are assigned 8×16 dots (see FIG. 13).

As a result, 80 characters horizontally and 25 characters vertically can be displayed. Therefore! In Figure s9 (a), the character string "W
ORD" is the first line, the string "CENTER"" is @2
The 424th line string “NEXT” is! The 2525th line is shown. Here, the 25th line is treated in a slightly special way, and is programmed to actually prohibit positioning of the cursor or the like. The means for this prohibition are
When attempting to move the cursor to the 25th line by referring to the row register of the two registers, the row register and column register, for knowing the current position of the cursor defined on the CRTC, the display contents of the CRT display This can be done by scrolling up. 10th
The figure is a flowchart showing this, and if step ii
, when the cursor down key is pressed with i, step 1
In step 1.2, it is determined whether the contents of the row register LR are the numerical value "24" or not. If the contents are the numerical value "24", the contents of the video ram VRAM are rewritten for screen scrolling in step 11.3. In other words, the dot data on the second line is transferred to the first line, the dot data on the third line is transferred to the second line,
By performing this transfer across all lines, it is possible to make it appear as if the screen is scrolling on the CRT display.As a zero-order process, if the 25th line already exists on the document memo 95M, Just read it and write the dot data on the 25th line to the video ram VRAM.If the 25th line does not exist on the document memo 93M, all you need to do is clear the 25th line of the video ram VRAM as blank information. .

On the other hand, if the line register is not at the 24th line in step 11.2, the cursor is automatically moved downward by setting the CRT display control to the line register LRF in the roller CRTC by "+1". In this way, the above-mentioned prohibition means allows the operator to operate while checking the front and back of the document.

Now, returning to the discussion in Figure 8, the operator attempts to center the character string ``CENTERING'' that has been intervened between the left and right margins, and in step 8.3 the key ``CENTERING'' is pressed.
Suppose that you press "R".At this time, as shown in FIG. 11, first in step 12.1, it is determined whether a character string exists in the line corresponding to the value of the line register LR in the CRT display controller CRTC. Check on the document memo 93M.

If the string exists, it is an error in the operation, so
Flow of control moves to step 12.2 where the programmable timer TIMER is set to 500m5ec. As a result, the buzzer AL starts sounding. Next, Videoram VR
All bit information corresponding to the 25th row of AM is inverted. In other words, 0" becomes "l" and 1" becomes 0". As a result,
When the buzzer AL sounds, the CRT display CRT 2
The fifth line is reversed black and white, and the programmable timer TIMER automatically stops after 500m5ac. Therefore, the buzzer AL will stop ringing. This state is shown in FIG. 9(b).

Then, in step 12.4, the error information storage register ERR is
The numerical value "3" is written to the CD as a centering operation error, and the information is stored for subsequent control.

Now,! Returning the i theory to Figure 8, the buzzer AL or CR
If the operator notices an error in the operation on the T-display CRT, press the "HELP" key on the keyboard KB in step 8.4.
''. The CRT screen displayed at this time is shown in Figure 9 (C). This screen is the 25th
The first row displays an explanation of centering and how to operate it. This screen can be created as follows. Figure 12 shows the key "H" in step 8.4 of Figure 8.
14 is a diagram showing internal processing corresponding to the pressing of the key "HELP". When the pressing of the key "HELP" is known in step 4.1, control moves to step 14.2, where the video ram VR
Area line memory 5 on the random access memory RAM where the display data of the 25th line AM is defined in advance
Transfer everything to AVE 1. This line memory 5AVE
l should be 16 bytes x 80 digits - 1280 bytes, because for 1 digit of character, 1 is required as shown in Figure 13.
This is because the character consists of 16 bytes.

Up to the next control step 14.3, the ERRCD, which has already been stored as ERROR information, is read in preparation for the next processing step 14.4. In step 144, E
The explanatory text and operating instructions corresponding to the RRCD number "3" are read from the floppy disk, and random access is performed.
The data is transferred to an unused area of the currently used RAM and stored. still,
Read out explanatory text and operating instructions for other functions according to E of ERRCD such as "rearrange", "move 0", and then in step 14.5, read out the explanatory text and operating instructions that have just been stored in the random access memory RAM into the video ram VRAM. Of course, the explanatory text, etc. stored in the random access memory RAM, which is written in the 25th line of the CRT display controller CRTC, is a 1-byte character code as character information.
RAMJ: becomes a character font of 16 bytes per character.

As described above, upon completion of 14.5, the control enters a key wait state. Here, as can be seen from Figure 1414, the permitted keys are 3 of “HELP′° “→″′←”
There are two keys. For pressing the key “←” !R14
Video RAM VRAM as shown in step l7.1 of the figure
Scroll the 25th line horizontally to the left. Subsequently, the following explanatory text and operating method information are taken out from the random access memory RAM containing one character and written to the 25th line and 80th column of the video RAM AVRAM, and at the same time, the cursor is displayed in the 80th column in the manner described above. On the other hand, when the key "←" is pressed, the video ram VRAM 25 row g is scrolled to the right as shown in step 18.1 in the w415 diagram.
The information in the first column of the row is stored in the random access memory RAM.
This is written in the 25th line and 1st column of the video RAM VRAM, and in this way, horizontal scrolling of only the 25th line is performed. In addition, when the key "HELP" is pressed, the process shown in FIG. 12 is skipped.

Now, returning the lecture to Figure 8, once the operator has understood the operation method related to centering by calling out the explanatory text and operation method described above, in step 8.5, press the key 'HELP'.
" is pressed again. At this time, the line where the cursor is located disappears from the screen as shown in Figure 0 (Figure 9(d)).

The 25th line reproduces the next line of the input document.

This screen is created as follows. FIG. 16 shows this. Step 8.5 in Step 19.1
At the same time, that is, when the key "HELP" is pressed, the character string "CENTERING" appears at the cursor line, that is, the 24th line.
are all transferred to the storage area line memory 5AVE2 on the RAM and stored therein. The line memory 5AVE2 may have a size of 80 bytes, which means that 80 characters per line are stored as character codes, so the capacity is for one line. p
Returning to the ta diagram, in step 19.2 all cursor lines on the video RAM VRAM are erased. As a result, the line where the cursor is located on the screen, that is, the cursor line, becomes a blank line. Then, the cursor is placed in the first column of the cursor line, and in step 19.3, all the character patterns of the next line already stored in the line memory 5AVE1 on the random access memory RAM are transferred to the 25th line of the video RAM VRAM. Flip it over and write 5AVEl here.”
stores inverted information as described above.

As a result of the above, the explanatory text etc. will be overwritten with the information in the line memory 5AVE1, and the next line will be displayed again. Returning to Figure 8 again, if the operator presses the key ``CENTER'' as a correct operation in step 8.6, the screen will be as shown in Figure 9(e), where the key ``CENTER'' is pressed by the device. Since it has been recognized, the center rig function mark "small" is displayed. After this, either input the character string to be centered from the keyboard or press the key "RECALL" which is one of the features of the present invention.Here, the key "RECALL" is pressed according to FIG. 8.8.7. If you press , one screen will be displayed as shown in FIG. 149 (f), which means that the character string that was input with an operational error can be used again.

This is done by the following control. The character string stored in the line memory 5AVE2 on the random access memory RAM is transferred so that it is displayed after the cursor in the cursor line.If it is input correctly in this way, the operator If you press the key "RETURN" in step 8.8, the screen will appear as shown in Figure 9 (g).
The character string "CENTERING" is centered, the cursor moves to the beginning of the next line, and the entire screen is scrolled up. As mentioned above, this scrolling transfers the second line to the first line, the third line to the second line, and then continues the same transfer for the information of the video ram VRA'M.
The 25th line may be transferred to the 24th line, and when the transfer is completed, a new line may be displayed at the 25th line by referring to the document memory SM.

In addition, in step 19.3 of Fig. 16, the video ram VRAM
Whether or not to invert the storage when writing to the line memory 5AVE on the random access memory RAM.
I needs to determine whether or not inversion information is stored, and this is done using the following method. As shown in Figure i13, the hatched pits have a 1ul gap between characters.
This bit is used to create l, and if it is inverted, it is set to logic "1", and if it is not inverted, it remains logic "0". Therefore, by determining the most significant bit of the first byte of each character, there is no need to provide a special flag, and this is a very effective method.

[Other Examples]

In the above explanation, the explanation and operation method for the HELP function was about centering, but other functions such as data sorting, searching, etc. are also possible.Although the explanation and operation method for the HELP function was called from a floppy disk, it can also be used from other storage devices. For example, it may be a hard disk, RAM, etc.

Furthermore, although the inverted display in the event of an erroneous operation is shown in the bottom row, it may be in any other row.

〔effect〕

As described above, according to the present invention, after correcting an erroneous operation, the line where the erroneous operation occurred is left blank and the cursor is moved to the beginning of the line, making subsequent operations easier. That is, the re-operation for the erroneously operated row can be performed immediately.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the configuration of a word processor. FIG. 2 is a diagram showing the keyboard layout. FIG. 153 and FIG. 4 are diagrams showing the "HELP function" using artificial technology. FIG. 5 is a diagram for clarifying the application of the present invention. FIG. 6 is a diagram showing the internal configuration of the device according to the present invention. FIG. 7 is a diagram showing an embodiment of the centering operation. FIG. 8 is a diagram for explaining the present invention in detail. FIG. 9 is a diagram showing a display screen according to the present invention. FIG. 10 is a diagram showing processing for pressing the cursor down key. FIG. 11 is a diagram showing the processing at the time when an operation error occurs. FIG. 12 is a diagram related to the display of explanatory text, etc. FIG. 13 is a diagram showing the byte structure for expressing one character. WIJ14 is a diagram showing left scroll control. The gIJlS diagram is a diagram showing right scroll control. FIG. 16 is a diagram showing the process when displaying the explanatory text is interrupted. FIG. 17 is a diagram showing a control for displaying a character string once erased again.

Claims (1)

[Scope of Claims] An input means for inputting characters; a display means for displaying the characters inputted by the input means; and after processing the erroneous operation, the line on the display means where the erroneous operation occurred is left blank. , a control means for displaying a cursor at the beginning of the line where the erroneous operation occurred.