JPH02289073A - Character processor - Google Patents

Abstract

PURPOSE:To enlarge and use the capacity of a sentence buffer by moving a start pointer of a display editing buffer into the sentence buffer, only when a reducing instruction is executed. CONSTITUTION:When a reducing instruction is inputted from a key input part 1, a deciding means 5 decides whether sentence data exists in an address instructed by a start pointer or not, in the case the start pointer of a display editing buffer is moved into a sentence buffer area. When it is decided that the data does not exist, a pointer moving means 6 moves the start pointer of the display editing buffer into the sentence buffer area. Subsequently, a display editing means 7 stores display editing information related to a reduced display from the address instructed by the start pointer moved in a storage part 2, and also, the stored display editing information is outputted to a display part 3. In such a way, the capacity of the sentence buffer can be extended.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Industrial Application Field This invention relates to character processing devices such as word processors,
More specifically, the present invention relates to a character processing device having editing functions such as reduced display.

(b) Conventional technology Conventionally, laptop-type word processors have a text buffer and a display/edit buffer. Two RAs
Most of them are configured within the M area, and the start pointer that indicates the data input position of the display/edit buffer is fixed. The reason why the start pointer is fixed in this way is that when the start pointer of the display/edit buffer points to the address of a text buffer area allocated within the same area, the text data stored in the text buffer will be erased. This was because of fear. Therefore, as shown in FIG. 5, the capacity of the display/edit buffer 7 is usually
The capacity is allocated based on the assumption that the capacity will be required when reduced display is instructed.

(C) Problems to be Solved by the Invention However, in the conventional word processors described above, the start pointer of the display editing buffer is fixed regardless of whether the display is reduced or not. There was a problem that the capacity became small.

This invention was made in consideration of the above circumstances, and only when a reduction instruction is given, the start pointer of the display editing buffer is moved into the text buffer, thereby expanding the capacity of the text buffer for use. To provide a character processing device that can perform

(D) Means for Solving the Problems This invention provides a memory section 2 in which a key input section l, a text buffer, and a display/edit buffer are allocated within one RAM area, and a storage section 2 in which a key input section l, a text buffer, and a display/edit buffer are stored. The display section 3 displays various kinds of information, and the storage section 3 is used to write/write text information to the storage section 3.
In a character processing device equipped with a writing/reading section 4 that performs reading, when the start pointer of the display editing buffer is moved into the text buffer area when an instruction for reduced display is received from the key input section l, A determining means 5 for determining whether text data exists at the address indicated by the start pointer, and a determining means 5 for starting the display editing buffer when it is determined that text data does not exist at the address indicated by the moved start pointer. This character processing device includes pointer moving means 6 for moving a pointer into a text buffer area, and display editing means 7 for storing display editing information regarding reduced display from the moved start pointer.

(E) Effect According to the present invention, when a reduction instruction is input from the key input section, the determining means determines that when the start pointer of the display editing buffer is moved into the text buffer area, the text is sent to the address indicated by the start pointer. It is determined whether the data exists, and if it is determined that the data does not exist, the pointer moving means moves the start pointer of the display editing buffer into the text buffer area, and then the display editing means moves the start pointer that has been moved in the storage section. Display editing information regarding the reduced display is stored from the address indicated by , and the stored display editing information is output to the display section.

(F) EXAMPLES The present invention will be described in detail below based on examples shown in the figures. Note that this invention is not limited by this.

FIG. 2 is a block diagram showing the configuration of a Japanese word processor which is an embodiment of the present invention. In the same figure, 20
is a keyboard as an input means, including a character input key for manually inputting a kana character string, a conversion key for converting a kana character string into a word consisting of kana and kanji, and a keyboard for manually inputting display editing instructions such as reduced display. It has function keys for 21 is an RA as a storage unit in which a text buffer and a display/edit buffer are allocated to one area.
It is M. 22 and 23 are display interfaces and LCDs as display units, which display various information stored in the RAM 21. The display section is L.
The display device is not limited to a CD, but may also be constructed of other dot matrix display devices such as an EL display device or a plasma display device. 24 is a ROM as a conversion dictionary, which stores a large number of words corresponding to kana characters.

25 is a CPU serving as a writing/reading section, a determining means, a pointer moving means, and a display/editing means;
Data processing, which will be described later, is performed according to the program written in M. This process will be explained below assuming the virtual circuit block diagram shown in FIG.

When a display mode switching instruction is input from the keyboard 20, the display mode determination section 25a determines that the normal display mode has been changed to the reduced display mode, and gives an instruction for reduced display to the data buffer control section 25b. Based on this, the data buffer control unit 25b changes the start pointer of the display editing buffer from the first pointer stacked in the pointer stack unit 25c to the second pointer, and controls data input/output to the RAM 21.

This data input/output control includes (1) control for updating display editing data based on changes in the stack pointer, and (2) control for updating display editing data based on changes in the stack pointer.
) control to store text data input from the keyboard 20 to a predetermined address in the RAM; and (3) control to output text data to be displayed to the LCD 23. The first pointer is the start pointer of the display edit buffer during normal display (see FIG. 4), and the second pointer is the start pointer of the display edit buffer during reduced display (see FIG. 5).

Next, the buffer (RAM) configuration of this embodiment will be explained using FIGS. 4 and 5. As shown in FIG. 4, BADUF 7 has a text buffer A, a display/edit buffer B, and a display buffer C. In the normal display mode, for example, 122×10=12 characters are developed in the display/edit buffer B. process, transfer the expanded data to display buffer C, and
It is displayed on CD23. The start pointer of the display/edit buffer at this time becomes the first start pointer D.

In the reduced display mode, for example, if you specify 1/4 reduced display, 12 characters will become 24 columns x 2 lines = 48 characters, and four times as many characters as in the normal display must be displayed. Display g collection buffer B, (1
A display/edit buffer for the combined area of B (for the 2nd line) and B (for the 2nd line) is required. The start pointer of the display/edit buffer at this time becomes the second start pointer D1. Therefore, only when reduced display is instructed, the first start pointer D is moved to the position of the second start pointer D, and the area A of the text buffer is reduced to A1. This allows effective use of a small RAM area. Furthermore, when returning to normal display, area AI of the text buffer returns to area A shown in FIG.

Next, control of data output according to this embodiment will be explained with reference to the flowchart shown in FIG.

First, when a display mode switching instruction is input from the keyboard 20, it is determined whether or not this instruction is for the reduced display mode (step 30). If YES, the amount of text data stored in the text buffer is searched (step 30). 31),
Check whether the data amount is more than a predetermined amount. In other words, when performing a reduced display and moving the start pointer from the first pointer to the second pointer (inside the text buffer area), the display editing data erases the text data and updates it. It is determined whether or not it is stored (step 32). Next, if it is determined that the text data will not be deleted, the start pointer of the display editing buffer is changed to the second pointer (step 33), then the display editing data required for reduced display is read from the text buffer (step 34), and then The display editing data is stored starting from the second pointer position (step 35). Note that if it is not the reduced display mode in step 30, the start pointer of the display editing buffer is set to the first pointer (step 36). Also, in step 32, Y
E.S.

That is, if it is determined that the text data will be erased when the start pointer is moved to the second pointer, a message that cannot be displayed in a reduced size is displayed on the LCD (step 37).

(G) Effects of the Invention According to this invention, when the RAM capacity is limited and the text buffer and display editing buffer are allocated to one area, display editing can be performed according to the display editing situation. Since the required area can be allocated within the text buffer, the small RAMp area can be used effectively, and as a result, the capacity of the text buffer can be expanded.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the basic configuration of this invention, FIG. 2 is a block diagram showing the configuration of an embodiment of this invention, and FIG. 3 is a virtual circuit block diagram for explaining the control of the CPU of the embodiment. , FIG. 4 and FIG. 5 are schematic diagrams showing the configuration of the buffer in the embodiment, and FIG. 6 is a flowchart explaining the operation of the embodiment. l...Key input section, 2...Storage section,
3...Display section, 4...Write/
Reading unit, 5... determining means, 6... pointer moving means, 7... display editing means. Diagram

Claims (1)

[Claims] 1. A storage unit in which a key input unit, a text buffer, and a display/edit buffer are allocated in one RAM area;
A display unit that displays various information stored in the memory unit, and a write/read unit that writes/reads character information to/from the memory unit.
In a character processing device equipped with a reading section, when the start pointer of the display editing buffer is moved into the text buffer area when an instruction for reduced display is received from the key input section, the address indicated by the start pointer is Judgment means for determining whether text data exists or not, and moving the start pointer of the display editing buffer into the text buffer area when it is determined that text data does not exist at the address indicated by the moved start pointer. A character processing device comprising a pointer moving means and a display editing means for storing display editing information regarding a reduced display from a moved start pointer.