JPS60104358A - Character processing apparatus - Google Patents

Abstract

PURPOSE:To make it possible to avoid undesired printing, by discriminating whether a character receiving printing indication is an already printed character or not on the basis of the content of a printing leading register and preventing the driving of a printing means in the case of the already printed character. CONSTITUTION:When a power source is turned ON, a printing leading register 11 and a cursor register 12 stores the leading position of document 10 by the program of ROM8 and a new figure code is written in the position shown by the register of the document memory 10 by new figure input and the register 12 is allowed to step. In the next step, the contents of both registers 11, 12 are compared and, if the content of the register 11 is equal to or larger than that of the register 12, printing is not performed in an already printed part and, if smaller, characters from the character shown by the register 11 to the character directly before the character by the register 12 are printed. By this method, when automatic printing is performed by using the end of the paragraph of a document as one unit, trouble for again printing an already printed part is avoided.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a character processing device having a function of sequentially printing input characters, etc. in accordance with input.

[Prior Art] In a conventional device of this type 1, for example, a character processing device that automatically prints a document manually entered in the middle of a paragraph, a line feed key that indicates a paragraph while pointing to a portion of the document that has already been printed is used. , etc., there is a risk that printing that the operator does not desire may occur, such as reprinting an already printed portion.

〔the purpose〕

SUMMARY OF THE INVENTION The object of the present invention is to eliminate the above-mentioned drawbacks and avoid unnecessary printing by preventing sequential printing when an already printed part is indicated. The object of the present invention is to provide a character processing device that provides the following features.

[Example] ν A detailed explanation of the present invention will be given below with reference to the drawings.

FIG. 1 shows the overall configuration of the present invention. As shown in the figure, when there is a key input from the keyboard 1, the editing means 2 performs an editing process according to the input key, and changes the document memory 4. Further, when a predetermined condition is met, the printing means 3 is driven. When the printing means 3 is driven by the editing means 2, it prints the characters after the character indicated by the print head register 5. The quality information of the character following the last printed character is stored in the print head register 5. However, - if the above-mentioned predetermined condition occurs before the position indicated by the printing start register 5, it is detected by the editing means 2 or the printing means 3 and no printing is performed.

FIG. 2 shows the configuration of an embodiment of the apparatus of the present invention, in which the keyboard 6 has a line feed key and other various keys necessary for character processing. The CPU 7 is a microprocessor, and performs control necessary for character processing according to procedures stored in the ROM 8. ROM8 is a memory that stores the procedure shown in FIG. RAM9 is a writable memory,
Document memory 10. Print head register 11. Cursor register 12. and other memory required for character processing. The document memory IO stores character codes, and the print head register 11 stores the head positions of unprinted characters.

The cursor register 12 also stores the cursor position. Next, the printer 13 prints characters. The pass line 14 transfers addresses, data, and control signals necessary for controlling each of the above-mentioned components.

Next, the operation of this embodiment having the above configuration will be explained.

FIG. 3 is a flowchart showing the procedure stored in the ROM 8, and the operation of this embodiment will be explained according to this diagram. After the power is turned on, the system waits for key power in step S1.

At this time, the print head register II and the cursor register 12 store the position of the head of the document memory 10. When the line feed key is input, the process advances to step S3 via step S2, and a line feed code is written in the position indicated by the cursor register 12 in the document memory 10. Next, in step S4, the cursor register 12 is incremented by one character.
Next, in step S5, the contents of the print head register 11 and the contents of the cursor register 12 are compared. If the contents of the print head register 11 are equal to or larger than the contents of the cursor register 12, the portion defined by both registers has already been printed, so printing is not performed and the process returns directly to step Sl. However, register 1
If the content of 1 is small, the process advances to step S6, and print head register l! The characters from the character indicated by to the character immediately before the character indicated by the cursor register 12 are printed. Next, step S
Proceed to step 7.

The contents stored in the cursor register 12 are stored in the print head register 11.Next, the process returns to step Sl, and the process waits again for key input.

If there is any other key input in step SI, the process advances to step S8 via step S2, where various processes necessary for character processing are performed depending on the type of key input, and the process returns to step SI.

In the above embodiment, the characters input so far are printed for each paragraph of the document, that is, each time the line feed key is input. Alternatively, printing may be performed every time the input of characters is completed.

[Effects] As explained above, according to the present invention, when automatically printing paragraphs, etc. of a document as a unit, it is possible to avoid the problem of reprinting an already printed part, and the following can be achieved. Therefore, it is possible to reliably prevent printing that is not desired by the operator.

[Brief explanation of the drawing]

FIG. 1 is an overall configuration diagram of the present invention. FIG. 2 is a block diagram showing the configuration of an embodiment of the character processing device of the present invention. FIG. 3 is an example of a character processing procedure of the device shown in FIG. It is a flowchart. 1...Keyboard, 2...Editing means, 3...Printing means, 4...Document memory, 5...Print start register, 6...Keyboard, 7...Microprocessor (CPU) 8...Memory (ROM), 9...Writable memory (RAM) IO...Document memory, 11...Print start register, 12...Cursor register, 13...Printer, 14... ·Path line. Patent applicant Canon Co., Ltd.

Claims (1)

[Scope of Claims] A document memory that stores characters; a print start register that stores information on the start position of unprinted characters among the characters stored in the document memory; and printing means that prints the characters in the document memory. determine whether the character instructed to be printed by the printing means is a previously printed character based on the contents of the print head register;
A character processing device characterized in that the printing means is not driven in the case of already printed characters. (Hereafter, margin)