JPH0515550B2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to an electronic device such as an electronic typewriter that is equipped with a memory and has a right alignment function.
In particular, input character strings in right-justified input mode are stored in memory in real time without buffering.

[Prior art]

Conventionally, when performing the right alignment function on electronic devices such as electronic typewriters, when a character key is pressed on the keyboard after specifying the right alignment input mode, the input contents are immediately sequentially input in a buffer. Stored. Subsequently, by pressing the print command key, the character string stored in the buffer is right-aligned to the rightmost position and printed, and at the same time, it is transferred and stored in the line buffer memory in a right-aligned form. . Therefore, a buffer for right alignment is required, and display control becomes complicated, such as displaying data in a line buffer memory or data in a buffer for right alignment input. There was a drawback.

〔the purpose〕

An object of the present invention is to eliminate the above-mentioned drawbacks, and when a right-justified input mode is specified, when a character key on the keyboard is pressed and a character is input, the already displayed character string is shifted to the left. An object of the present invention is to provide an electronic device that can successively confirm input character strings by displaying the input characters at the rightmost position of a display means.

That is, the present invention provides an input means for inputting characters, a display means for displaying the characters input by the input means, and an instruction information generation means for generating right alignment instruction information for the characters input by the input means. and when the right alignment instruction information is generated by the instruction information generation means, each time a character is input by the input means, the characters already displayed on the display means are shifted to the left, Display control means for controlling display on the display means so as to sequentially display characters input by the input means at the rightmost position of the display means;
It is characterized by having the following.

〔Example〕

Hereinafter, the present invention will be explained in detail with reference to the drawings.

FIG. 1 shows an example of the configuration of the present invention.

Here, KB is a keyboard, which includes alpha alphabets A to Z, alpha numerical keys AN consisting of numbers 0 to 9, right alignment key RALI to specify right alignment input mode, and return key.
Place RETURN etc. respectively.

The CPU is a central processing unit in the form of a microprocessor, and is configured in the form of a sequential control circuit including, for example, a clock pulse generation circuit, a delay circuit, a gate circuit, and other logic circuits.

PRT is a printing device similar to a serial printer, in which keys are entered from the keyboard KB, and characters and numbers corresponding to each key entry are printed onto printing paper under the control of the print control signal CPRT from the central processing unit CPU. Print.

The DIS is a display device such as a dot matrix type liquid crystal display, and under the control of the display control signal CDIS from the central processing unit CPU, the corresponding characters and numbers are displayed by inputting keys from the keyboard KB. .

ROM is a read-only memory, and when the central processing unit CPU supplies control signals to various devices such as the printing device PRT and the display device DIS, it sequentially sends control procedures such as the one shown in Figure 3 to the central processing unit CPU. A group of microinstructions necessary for notification is memorized.

The RAM is a readable and writable random access memory, and has an area for storing the operating status of each device, as well as a line buffer memory DISP and a text area TEX for storing characters, numbers, etc. input from the keyboard KB.

BUS is the central processing unit CPU and read-only memory
A bus line that electrically connects ROM and random access memory RAM and is used to transfer memory addresses and data.

Next, regarding the operation example of the present invention shown in FIG. 1, FIG. 2 shows an example of control contents entered by key operations on the keyboard KB and stored in the random access memory RAM, and a flowchart of the control processing. This will be explained with reference to FIG. 3, which shows an example.

First, in step 1 shown in Figure 2, turn on the power by operating the keys on the keyboard KB.
Then, in step S1 shown in Fig. 3,
Clear the entire random access memory RAM,
Display device DIS cursor position and printing device
Cursor pointer CP, which is a memory area that stores the print head position of PRT, and head pointer
Store "1" in each HP. Next, in step S2, the random access memory RAM is
The data in the internal line buffer memory DISP is displayed on the display device DIS, and then in step S3, a key on the keyboard KB is pressed to wait for a key input.

Next, when there is a key input for the right-aligned key RALI on the keyboard KB in step 2, it is determined in step S4 that it is not a character key, and the process moves to step S5.In step S5, it is further determined that the return key is not RETURN, and the process proceeds to step S6. Transition. Then, in step S6, for example, "14" is stored in the cursor pointer CP as data indicating the rightmost position that has already been set, and the shift counter SC, which counts each time a character is input from the keyboard KB, is cleared, and further right-aligned. A flag F indicating processing is set to "1". Next, the process returns to step S2, and the control processes of steps S2 and S3 described above are repeated.
As shown in the column of step 2 in FIG. 2, the display on the display device DIS is such that the cursor is displayed at the rightmost position.

Next, when the character key □A, which is a character, is pressed in step 3, the step shown in FIG.
Transition to S4, S7, and S8 sequentially. In step S8, after shifting the data in the line buffer memory DISP from the right end in the line buffer memory DISP to the left by the number of digits indicated by the data of the shift counter SC, if the input character is printed, the input character is Controls so that characters are stored in the rightmost position. However, at step 3 shown in Figure 2, the data of the shift counter SC is "0".
Therefore, the data in the line buffer memory DISP is not shifted, and the data “14” of the cursor pointer CP in the line buffer memory DISP is
The input character "A" from the keyboard KB is stored at the position indicated by , that is, the rightmost position when printed as indicated by the cursor on the display device DIS, and the shift counter SC is incremented by 1.

Next, in steps 4 and 5, the keyboard KB
Each character key above □B, □C, □D, □E and □
When F is pressed in sequence, steps S4, S7, and S8 are executed as described in step 3, and the display contents of the display device DIS change, and the column of step 5 shown in Fig. 2 is changed. The display state of the display device DIS will be as shown in .

Next, when the return key RETURN on the keyboard KB is pressed in step 6, the step
Transitions to S4, S5, and S9 sequentially. Then, in step S9, the data of the cursor pointer CP and the data of the head pointer HP are compared, and the data "14" of the cursor pointer CP is determined to be the head pointer.
Since the HP data is greater than “1”, the step
Migrate to S10.

In step S10, the line buffer memory
Prints the character or space indicated by the head pointer HP in DISP, and increments the head pointer HP by 1. Here, in step S9, the data "14" of the cursor pointer CP indicates that the head pointer HP is
Steps S9 and S10 until the data of
The control process is repeated.

If the above-mentioned conditions are met in step S9, the process moves to step S11, and the printing device PRT
Returns the print head to the home position and simultaneously performs paper feed. Furthermore, in step S11, "1" is stored in each of the cursor pointer CP and head pointer HP, flag F is reset, data in the line buffer memory DISP is transferred to the text area TEX, and the line buffer memory DISP is cleared. do.

Note that the flag F is set to "1" in step S7.
If not, that is, if there is no right alignment processing instruction, the process moves to step S12, and the input character is printed at the position indicated by the head pointer HP.

〔effect〕

As explained above, according to the present invention, when the right-aligned input mode is specified, when a character key on the keyboard is pressed and a character is input from then on, the already displayed character string is shifted to the left. Thereafter, the input characters are displayed at the rightmost position of the display means, so that the input characters can be confirmed one after another, thereby preventing erroneous operations.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an example of a schematic configuration of the present invention, FIG. 2 is a diagram showing an example of a key operation procedure of the present invention, and FIG. 3 is a flowchart showing an example of control processing of the present invention. be. KB...keyboard, CPU...central processing unit,
PRT...Printing device, DIS...Display device, ROM...Read-only memory, RAM...Random access memory, DISP...Line buffer memory, BUS...Bus line.

Claims (1)

[Scope of Claims] 1. Input means for inputting characters; Display means for displaying characters input by the input means; Instruction information generation for generating right alignment instruction information for characters input by the input means. means, when the right alignment instruction information is generated by the instruction information generation means, each time a character is input by the input means, the characters already displayed on the display means are shifted to the left. , display control means for controlling display on the display means so as to display characters input by the input means at the rightmost position of the display means.