JPS6247694A - Character processor - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a character processing device such as a word processor, and more particularly to a character pattern generation device for generating character patterns.

<Prior art> In order to display and print various characters, Japanese word processors have a character pattern generator that stores and stores a large number of character patterns.The memory that stores and stores these character patterns also needs to have a large capacity. Met.

Generally, when character patterns are stored and retained, there are two methods: storing them in ROM and installing them in the device (processor body), and storing character patterns on a floppy disk, which is an external memory device, and storing the character patterns on the floppy disk when using the word processor. From the disk to R in the word processor
There is a method in which AM is loaded.

The former method requires a large-capacity ROM to be installed in the device, making the device larger, and the latter method requires text data, etc. to be transferred from the floppy disk to the internal ΩRAM. The RAM to store
Since the data storage area of the RAM will become narrower, if you want to secure a certain amount of this data storage area, the corresponding RAM
The problem is that it is necessary to increase the capacity of 1, which inevitably leads to high costs.

Therefore, in terms of cost, it may be possible to store all character patterns on a floppy disk and retrieve the necessary character patterns directly from the floppy disk each time. It must be loaded from a floppy disk,
The problem is that the pattern generation speed is very slow and the character processing efficiency is poor.

<Purpose> The present invention eliminates the need to equip a text processing device such as a word processor with a large capacity memory when generating a large number of character patterns, thereby avoiding high costs and improving the efficiency of character processing. The object of the present invention is to provide a character processing device which is advantageous overall by devising measures to prevent the deterioration of the character so much.

<Embodiment> FIG. 1 is a block diagram showing the configuration of a character processing device according to the present invention. In the original diagram, 1 is a keyboard having a group of character keys and a group of control keys for controlling editing, and 2 is a CPU. Editing control is performed according to the program in ROM3.

The ROM 3 stores, in addition to the editing control program, character patterns for frequently used characters. Examples of frequently used characters include hiragana, numbers, and frequently used kanji.

4 is a RAM that constitutes a text buffer 7 memory and various flags during editing control, 5 is a display, and 6 is a printer.

Reference numeral 7 denotes a floppy disk device as an external storage device, and the floppy disk installed in the disk device stores and holds character patterns for characters that are used less frequently, other than the characters stored in the ROM 3 mentioned above.

8 is the character pattern for the input character in the above ROM
This is a reference table for checking whether the data stored in the floppy disk is stored in the floppy disk or not, and the reference table 8 is structured as shown in FIG.

In other words, if the pattern is held in ROM3 corresponding to each character code, the ROM side area stores that pattern.
If the address on M is also held in the floppy disk, the addresses (tracks, sectors) on the disk are held in the floppy disk side area.

Therefore, when displaying or printing characters, the CPU2
Although the character pattern to be displayed or printed is in the ROM 3 or the floppy disk, the address is checked in the reference table 8, and the corresponding character pattern is retrieved from the ROM 3 or the floppy disk.

When generating this character pattern, the character pattern is loaded and retrieved from the floppy disk only for the character group that is used infrequently, and the character pattern for the character group that is generally used frequently is retrieved from the ROM3 at high speed. Therefore, overall character processing can be performed efficiently.

Effect> As described above, according to the present invention, character patterns of frequently used character groups are stored and retained in the ROM in the character processing device, while character patterns of other less frequently used character groups are stored in the external storage device. By storing the memory on a floppy disk and generating character patterns by using the ROM and a 70 Sopy disk in combination, the ROM in the character processing device can be compared to a case where character patterns of all character groups are stored. In addition, the RAM in the character processing device can be widely used as a storage area for text data, and although a floppy disk is used to generate character patterns, character patterns of frequently used character groups can be generated from ROM at high speed. Since it can be printed and stored in a single unit, the overall character processing can be carried out efficiently, and it also has the characteristic of being inexpensive in terms of cost.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of the character processing device of the present invention;
FIG. 2 is a diagram specifically showing the reference table of FIG. 1. 1: Keyboard, 2: CPU, 3: ROM. 4: RAM, 5: Display, 6: Printer,
7: Floppy disk device, 8: Reference table. Agent Patent Attorney Aihiko Fuku (and 2 others) Figure 1 Figure 2 m!

Claims (1)

[Claims] 1. Among character patterns generated by a character processing device for display or printing, character patterns for frequently used character groups are stored in a ROM in the device, and character patterns for character groups other than the above character groups are stored. While storing the memory on a floppy disk, which is an external storage device,
A reference table is provided for searching whether a character pattern corresponding to a character code is stored in the ROM or the floppy disk, and the character code is retrieved from either the ROM or the floppy disk by referring to the reference table. A character processing device characterized in that it generates a character pattern corresponding to.