JPS6051924A - External character access system - Google Patents

Abstract

PURPOSE:To shorten an external character registration and a read-out time by constituting a sytem so that a necessary data for the external character registration of one character is divided into an external character memory, external character memory selector and a table buffer, to store. CONSTITUTION:An external character area consists of an external character memory 1 having plural data areas which can read/write an image data of an external character for an external character access, an external character memory selector 2 for storing a flag showing a registration state of a handled external character code, to the external character memory and a pointer showing an address of the external character memory, a table buffer 3 for storing as one pair a section/point code and also a flag showing a free area of the external character memory at every order of an external character data registered in the external character memory, and a table pointer 4 showing an address point of the external character memory to be registered in the next time. The flag of the selector 2 to which a section/point image data is fed from the outside, the buffer 3 and the pointer 4 are retrieved, whether the free area exists or not is checked, and an access is executed to the memory 1.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a system for accessing external characters in systems using Kanji.

[Technical background of the invention]

The conventional external character area is a flag (FLA) as shown in Figure 1.
G), wards, dots, and image data (data) constitute a block B for one character, and as shown in the figure, blocks B for multiple characters were arranged on the memory. For this reason, when registering external characters, the same ku/dot as the ku/dot given from the outside must be registered.
It was necessary to check from the beginning of the external character area to see if points and data were already registered.

This method reads the flag on the memory mentioned above, and if the flag is set, compares the following wards/points with the wards/points given from the outside, and if they are the same, a new image is created in the data area following these wards/points. Register data. if,
If the wards/points are different from those given from outside,
Read the flag of the next area and repeat this operation one after another. If all areas on the memory are checked in this way and no new wards/points are registered, new flags/wards/points/image data are set in the area indicated by the table pointer and the table pointer is advanced. If the flags for all areas are set and there are no new wards/points, it is assumed that all areas are empty, and new wards/points/image data are registered in the oldest area indicated by the table pointer. Advance the table pointer.

Next, in the case of reading external characters, read the flag of the area in the memory indicated by the table pointer, find the area where the flag is set, and match the ku/point following the flag in this area to the specified ku/point. If the area is the same, the image data following these wards/points is read out. This operation is repeated, and when all areas on the memory are checked and the area indicated by the table pointer is returned, it is determined that the external character of the designated ku/dot is not registered, and this fact is notified to the outside.

[Problems with background technology]

As mentioned above, the conventional external access method has the disadvantage that in the worst case, the entire external character area must be checked, which takes time for both registration and readout, which leads to a slowdown of the system.

[Purpose of the invention]

SUMMARY OF THE INVENTION In view of the above-mentioned drawbacks, an object of the present invention is to provide a custom character access method that shortens the time for registering and reading out custom characters, thereby increasing the speed of the system.

[Summary of the invention]

The present invention provides a custom character memory that can read and write image data of custom characters and has multiple data areas, and a custom character memory that is divided into all wards and dots of the handled custom characters and stores the custom character codes indicated by the wards and dots in the custom character memory. A private character memory selector that stores a flag indicating the registration status and a pointer indicating the address of the private character memory, and a 5-point code for each order of private character data registered in the private character memory, and further indicating the empty area of the private character memory. It is equipped with a table buffer that stores flags as a pair and a table pointer that indicates the address point of the external character memory to be registered next.When registering a external character, it reads 1/kuta on the external character memory and attempts to register it. Checks whether the external character has been registered or not. If it has been registered, new data is newly registered in the corresponding address area of the external character memory. If it is not registered, the 7 in the table buffer indicated by the table pointer is registered.
Read the lag and search for an empty area, register new data in the corresponding address area of the external character memory corresponding to this empty area, and if there is no empty area, delete the old ku/dot of the external character memory selector and enter the new ku/dot. is written, new data is registered in the corresponding address of the external character memory corresponding to this new ward/point, and the next time the external character is read, the specified ward/point is written.
Read the flag of the external character memory selector that points to the point, and if this flag is set, read the image data from the corresponding address of the external character memory and pass it to the outside, and if the flag is not set, execute the G - instruction. The above object is achieved by performing an operation to inform the outside that the image data that has been registered is not registered.

[Embodiments of the invention]

An embodiment of the private character access method of the present invention will be described below with reference to the drawings. FIG. 2 is a diagram showing an example of a custom character area to which the custom character access method of the present invention is applied. This private character area consists of a private character memory 1 that has multiple data areas that can read/write image data of private characters for access to private characters, and a private character memory 1 that is divided into all wards and points of the handled private characters and stores the private character code shown at each point. A private character memory selector that stores a flag indicating the registration status in the private character memory and a pointer indicating the address of the private character memory, and the ku/ten code and empty area of the private character memory for each order of the private character data registered in the private character memory. It consists of a table buffer 3 which stores a pair of flags indicating the following, and a stable pointer 4 which indicates the address point of the external character memory to be registered next.

FIG. 3 (4) is a detailed example of the external character memory selector shown in FIG. , the pointer indicates the address of the external character memory corresponding to the flag. FIG. 3(B) is a detailed example of the table buffer 3 shown in FIG.
LAG) and registered image data wards and points, and the arrangement of these flags, wards and points matches the arrangement of the image data stored in the external character memory 1.

Next, the operation of this embodiment will be explained. First, for custom character registration, ku/dot image data is given as one block from the outside. This system reads the flag of the external character memory selector 2 according to the given ku/dot. if,
If the flag is set, it is determined that the old image data indicated by this ward/dot has already been registered in external character memory 1, and the new image data is newly stored in the corresponding data area of external memory 1. register.

7- In other words, if the flag has been reset in the external character memory selector 2, it is determined that the external character registration indicated by the given ward/point does not exist in the external character memory 1. Therefore, in order to search for an empty data area in the external character memory 1, the flag in the table buffer 3 indicated by the table pointer 4 is read. If this flag of table buffer 3 is reset, it means that there is an empty data area in external memory 1, so set this flag and continue the newly given wards/points from the outside to this plug. The data is registered in the table buffer 3 to secure a data area. Next, this newly given ward and
The flag and pointer indicated by the dot are set, new image data is registered in the corresponding data area of the external memory 1, and finally the table pointer 4 is advanced by one to complete the registration of one external character.

However, when the flag in the table buffer 3 indicated by table pointer 4 is set, it indicates that there is an empty data area in the external character memory 1. Therefore, the oldest external character indicated by table pointer 4 The contents of the data area in memory 1 are rewritten to image data of external characters as shown below. First, read the old wards/points from the table buffer 3 indicated by the table pointer 4,
The flag of the external character memory selector 2 corresponding to this old kuten is reset to erase the old kuten. Next, the new ku/point given from the outside is written into the table buffer 3, and the contents of the table pointer 4 are set in the area of the external character memory selector 2 indicated by the new ku/point.

Thereafter, new image data is registered in the data area of the external character memory 1 indicated by the address pointer of the external character memory, the table pointer 4 is advanced by one, and the external character registration is completed.

Next, when external characters are instructed to read, the flags in the external character memory selector 2 are read according to the designated ku/dot. If the flag of the external character memory selector 2 is set, the image data of the corresponding data area is read from the external character memory 1 and passed to the outside. if,
If the flag of the external character memory selector 2 has been reset, it is determined that the image data of the designated ward/dot is not registered in the external character memory 1, this fact is notified to the outside, and the read operation is terminated.

According to this embodiment, external character memory 1. The data necessary for registering one character as a custom character, that is, flags, wards, dots, and image data, are divided and stored in the custom character memory selector 2 and the table buffer 3, respectively. By storing a flag indicating the registration status of the private character 1 in table buffer 3 and a flag indicating the presence or absence of an empty data area in the private character memory 1 in the table buffer 3, you can register the private character by simply checking the area of the specified ku/dot. It is possible to register and read external characters, shorten the time required to register and read external characters, and speed up the system. In particular, when reading, only the external character memory selector 2 can be specified by searching. It is possible to know whether or not a registered external character is registered, and the above effect is particularly effective when reading.

11- [Effect of the invention] As described above, according to the external character access method of the present invention,
A method is adopted in which the data required to register one character is divided and stored in a custom character memory, a custom character memory selector, and a table buffer, and only the necessary part is searched when registering or reading a custom character. By adopting a processing method, it is possible to shorten the time for registering and reading external characters, thereby increasing the speed of the system.

[Brief explanation of drawings]

FIG. 1 is a diagram showing an example of the structure of a custom character area on a memory to implement the conventional custom character access method, and FIG. 2 is an example of the structure of a custom character area to which the custom character access method of the present invention is applied. Figure 3 (2) is a schematic diagram showing a detailed example of the external character memory selector 2 shown in Figure 2, Figure 3 (Bl
2 is a schematic diagram showing a detailed example of the table buffer 3 of FIG. 2. FIG. ■...External character memory 2...External character memory selector 3...Table buffer 12-4...Table pointer agent Patent attorney Noriyuki Chika (and 1 other person) =13--126 Figure 1

Claims (1)

[Scope of Claims] (1) For each ward/dot code of the external character memory in which image data is registered and the handled image data, whether or not the image data indicated by the ward/point is registered in the external character memory. A private character memory selector consisting of flag information indicating the image data and an address pointer in which the registration position of the corresponding image data in the private character memory is set, and for each private character data registered in the private character memory, its ku/ten code and the private character memory. It consists of a table buffer in which flag information indicating the free status of the image data is set as a pair, and a table pointer in which the registration position of the image data to be registered in the external character memory is updated and set, and the ku/ten code specified from the outside is used as a key. By referring to the above-mentioned external character memory selector and table buffer, new image data is registered at the specified address position of the above external character memory, and when necessary,
A private character access method characterized by reading. (2) When registering a custom character, refer to the flag information of the custom character memory selector above to find out whether the given custom character is already registered or not, and if it is registered, send the given new image data to the corresponding address in the custom character memory. Register it in the data area, and if it is not registered, refer to the table buffer indicated by the table pointer and search for an empty data area in the external character memory.
Register new image data in the corresponding data area, and if there is no empty area, erase the old ku/dot in the external character memory selector, write the given new ku/point code, and save the external character memory corresponding to this new ku/dot. 2. The private character access method according to claim 1, wherein new image data is registered in the address of the character. (3) When reading a custom character, it is checked whether the image data of the designated custom character is registered in the custom character memory by referring to the custom character memory selector using the designated ku/ten code, and if it is, the custom character is read. 2. The external character access method according to claim 1, wherein the image data is read from the corresponding address in the memory, and if the image data is not registered, that fact is notified to the outside.