KR900001865B1 - Method for centralising line - Google Patents

Abstract

The electronic typewriter has the function that prints the input character and operates a center lineup operation when a character has already been input on a same line before operating a center lineup operation. The electronic typewriter includes CPU (1) for comparing input data by a program, an address latch (2) for latching a designated address signal, a ram (3) for storing a text, PROM (4) for storing a program, an address decoder (5) for generating a select signal for each memory and peripheral controllers, controllers (6,7) for controlling a display device (9) and a keyboard (10), and a print driver for driving a printer.

Description

Central Alignment Method of Electronic Typewriter

1 is a block diagram of the present invention.

2 is a flow chart of the present invention.

* Explanation of symbols for main parts of the drawings

1: CPU 2: address latch

3: ram 4: rom

5: Address Decoder 6: Display Controller

7: Keyboard controller 8: Printer driver

9: display device 10: keyboard

11: printer

In the present invention, an electronic typewriter using a one-chip microprocessor, if a character is already input in the same line before performing the center alignment function, prints the input character and performs the center alignment function and the factors overlap at the same time. The present invention relates to a centering method of an electronic typewriter which is centered so as not to be aligned.

In the conventional electronic typewriter, when performing center alignment, the carriage is always moved to the center of the document to execute the printing regardless of the presence or absence of characters already input on the same line before performing the center alignment.

Therefore, when the sum of the number of characters already input and the number of characters to be center-aligned exceeds half of the total number of characters on a line, a superimposed factor occurs on the characters already input.

In addition, as a method for solving the above problems, if there is a character already input, the center alignment function is not performed on the line. Therefore, there is a problem that the center alignment function itself can not be used when there is already an input character.

The present invention relates to a center alignment method of the electronic typewriter proposed to solve the above problems, if there is a character already entered before the center alignment function by printing the already input character after moving the carriage to the center of the remaining portion The center alignment function is performed, and if there is no input character, the object is to perform a normal center alignment function by moving the carriage to the center of the document.

Exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 shows a system diagram for carrying out the present invention.

A central processing unit (hereinafter referred to as CPU) (1) for comparing and judging and processing data input by a program; an address latch (2) for latching each system-specific address signal output from the CPU; and a document RAM (3), a programmable ROM (hereinafter, referred to as a PROM) in which the program of the present invention is embedded, and (4) and each address output signal are outputted to output a selection signal of each memory and peripheral controller. A controller 6, 7 for controlling the address decoder 5, the display device 9 and the keyboard 10, a printer driver 8 for driving the printer, and a display device for displaying input data. (9), a keyboard 10 for applying various inputs, and a printer 11 for printing the input data.

The operation of the present invention configured above will be described in detail based on the flowchart shown in FIG.

At the same time power is supplied to the system, the carriage is automatically initialized according to the program stored in the PROM 4, and the keyboard 10 waits for the key input.

When a user inputs characters through the keyboard 10 to create a document, the input data is stored in the RAM 3 which is a document storage area.

At this time, when the user presses the center alignment key, the CPU 1 checks whether there is a character already input in the same line where the carriage is located. If there is no input character, the maximum number of inputtable characters is stored in the memory C, and a value corresponding to 1/2 of the maximum number of inputtable characters stored in the memory C is stored in the memory D.

The markings of the constant memories C and D refer to addresses C and D of the memory area.

By driving the printer driver 8, the carriage is moved by a value corresponding to 1/2 of the maximum number of input characters so that the carriage of the printer 11 is located at the center of the document, and the center is input through the keyboard 10. The alignment character is stored in the RAM (3) which is a character storage area.

If the number of characters to be center-aligned is greater than the maximum number of characters that can be entered, an alarm will sound to inform the user.

If the number of center aligned characters to be input is smaller than the maximum number of characters that can be input, the CPU 1 drives the printer driver 8 as described above when an execution key is input after all the characters for center alignment are input.

The value corresponding to 1/2 of the number of center aligned characters is stored in the memory area E, and the printer driver 8 is driven to move the carriage to a point corresponding to 1/2 of the number of center aligned characters. Move it. The constant memory (E) designation refers to address E of the memory area.

Thus, the carriage prints the center alignment character at the position for printing the center alignment character and returns it.

If there is a character already input before performing the center alignment function, the number of input characters is stored in the memory area A. FIG.

After printing the input characters, the maximum number of input characters in a line is stored in the memory area (B). After storing the value except the number of input characters in the maximum number of characters that can be input into the memory (C), the value corresponding to 1/2 of the maximum number of characters except the number of characters that can be input into the memory area (D) Save it. At this time, the display of the predetermined memory (B), (A) refers to the address B and A of the memory area.

After driving the printer driver 8 to move the carriage to a point corresponding to 1/2 of the maximum number of characters that can be input except for the input characters through the keyboard 10 as in the case where there is no input characters described above Process input data.

Using the above-described central alignment method, regardless of the number of characters already entered on the same line, the carriage is always moved to the center of the document so that the superimposition factor of the characters generated during printing is added to the program without adding parts. Can be avoided.

In addition, the problem that the central alignment function is not performed on the same line when there is already input character, so that the center alignment function can be performed regardless of the presence or absence of the input character to reduce the cost and improve the competitiveness of the product There is.

Claims (1)

A CPU 1 for comparing and judging data input by a program, an address latch 2 for latching each system designated address signal output from the CPU 1, a RAM 3 for character storage, and A PROM (4) having a built-in program, an address decoder (5) which receives the address signal and outputs a selection signal of each memory and peripheral controller, a display device (9) and a keyboard (10) In an electronic typewriter comprising a controller (6, 7) and a printer driver (8) for driving a printer (11) for printing the input data, (a) the presence or absence of data already entered when a central alignment key is input; (B) If there is no input character, drive the printer driver 8 to move the carriage of the printer 11 to a point corresponding to 1/2 of the maximum number of input characters on the same line where the carriage is located. , (C) input characters After printing the input characters, the printer driving unit 8 is driven to move the carriage of the printer 11 to a point corresponding to ½ of the maximum number of input characters possible except for the number of characters printed, and (d) In order to save the input characters in the memory (3), (e) If the number of center aligned characters is larger than the maximum number of input characters in the line, an alarm will be notified to the user. If it is small, press the Execute key after all the center alignment molecules are input, and (4) drive the printer driver 8 to move the carriage to the point corresponding to 1/2 of the number of center alignment characters, and then print the center alignment characters. Central sorting method of an electronic typewriter.

Images