JPS6250945A - Program loading system - Google Patents

Abstract

PURPOSE:To easily change and expand the function of a system as a whole by storing a load program name and the program load information in separate files and changing the contents of the name table of the load program. CONSTITUTION:A program loader 4 first reads the name and the load information from a load program name file 1 and a program load information file 2. At such a time, to designate the file loaded, a flexible disk FD, a hard disk DK or an IC card is indicated. Next, a program loader 4 searches the file 2 equivalent to the load program name of the registered file 1 and loads to the designated address of a program memory 5 in accordance with the information. At such a time, the loader 4 processes in the sequence of the registration for one program name and executes the load processing until the stopper is detected as the load program name. After the processing is completed, the loader 4 starts the initial starting program and completes the processing of the loader 4.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a program loading method, and more particularly to a program loading method that allows modification and expansion of the functions of the entire system.

[Background of the invention]

Usually, the content of business that can be processed by one terminal device is limited, and the program executed by the processor built in the terminal device is also fixed and corresponds to the business. Recently, there has been a demand for making the tasks that can be processed by one terminal device variable and providing expandability. Therefore, K is variable in the program.
It needs to be scalable.

Conventionally, as a method of program loading performed at the time of system startup, for example, Japanese Patent Application Laid-Open No. 58-1681
As described in Publication No. 48, the standard program file and the change program file are stored in a flexible disk, etc., and the address of the main storage device to be changed and the change program are input to create the change program consisting of the data of the changed part. Create and modify simple content from these programs. In the program loading method described above, the program is changed at the time of loading, but its function is almost at the same level as the memory batch, and only some changes can be handled.

There is a need for a method that allows the functionality of the entire system to be changed and expanded with simple operations when loading a program.

[Purpose of the invention]

In order to meet such demands, an object of the present invention is to provide a program loading method that allows the functions of the entire system to be easily changed and expanded.

[Summary of the invention]

To achieve the above object, the program loading method of the present invention includes a table in which names of programs to be loaded are registered, a table in which load information of each program is registered, and a program loader that loads programs according to data in the table. By storing the load program name and program load information in separate files and changing the contents of the load program name table, the program loader can update the program registered in the changed program name table. The feature is that it loads.

[Embodiments of the invention]

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 2 is an explanatory diagram of a load program name and program load information file according to the present invention.

In the present invention, the first requirement is to have the load program name and program load information in separate files.

In FIG. 2, 1 is a file in which the name of the load program is registered, 2 is a file in which program load information is stored, and 3 is a file showing detailed contents of the program load information 2. The file may be a flexible disk, hard disk, IC card, or the like. As a load program name, PRGOOf,
002, 003, 004, 005, a stopper, and the initial startup program name are stored. In addition, the program load information includes the program name, storage address, and capacity (size).

Load address etc. are stored.

FIG. 3 is a diagram showing an outline of processing of the program loader of the present invention.

In FIG. 3(a), 4 is a program loader, 5 is a memory, and 1.2 is a load program name file and a program load information file in FIG. 6 in FIG. 3(b) is a diagram showing the status of each program stored in the file 2. As shown in FIG.

As described above, the file 2 may be a flexible disk, a hard disk, or an IC card, but as shown in (b), each file has a different program capacity, so it is stored in a mixed size state.

By providing the load program name and the program load information in separate files 1 and 2, the program loader 4 loads the program into the memory 5 according to the program load information of the file 2 in the order of registered names indicating the processing order of the file 1. .

As a result, memory 5 has PRGOOI, 002.0
03,004,005... are stored.

Therefore, when changing or expanding the system, simply by re-registering the loading program name, loading will be performed in the registered order, making it possible to make major changes. In FIG. 3, by re-registering the load program name, the memory 5 stores PRGOOl, 002,005,004,0.
The programs were loaded in the order of 03.

FIG. 4 is a hardware configuration diagram showing an embodiment of the present invention. In configuration A, the terminal device is equipped with a flexible disk FD or hard disk DK as an external storage device.

This is the case where an IC card is added to configuration A. The only difference between configuration A and configuration is whether or not an IC card is included in the configuration. However, when an IC card is used as a storage device as in configuration A, the load program name is stored in the IC card. Register the contents of file l,
By replacing the IC card with a different IC card, you can immediately start up a different system. But to configure a completely different system, as in this case.

As shown in FIG. 3(,), it is necessary to store many types of programs in the file 1.

Next, the processing operation will be explained with reference to FIGS. 3 and 4. The program loader 4 first reads the name and load information from the load program name file 1 and the program load information file 2. At this time, in order to specify the file to be loaded, use the flexible disk F shown in Figure 4.
D. Indicates the hard disk DK or IC card. Next, the program loader 4 searches the program load information file 2 corresponding to the registered load program name of the file 1, and loads the program to the specified address of the memory 5 according to the information. The loader 4 processes each program name in the order of registration, and performs the above loading process until it detects a stopper as the load program name. After the loading process is completed, the program loader 4 starts the initial startup program. , the program loader 4 ends its own processing.

FIG. 1 is a processing flowchart of a program loader showing one embodiment of the present invention.

The program loader 4 first reads the name from the load program name file 1 (step 1), reads program load information from the file 2 (step 2),
Here, files 1 and 2 are on a flexible disk, hard disk, or IC card. Set n (pointer) to 1 (step 3), and check whether the nth load program name is a stopper (step 4). If it is a stopper, go to step 8; if it is not a stopper, go to step 5. Here, program load information is searched using the program name as a key (step 5). Next, the program load information in the searched program load information is searched. The program is read by the corresponding size from the program storage address and loaded to the memory load address (step 6).

Update n (pointer) by +1 and return to step 4 (step 7). In step 4, if the nth program name is stopper, start the initial startup program and end the process of program loader 4 itself. (
Step 8).

FIG. 5 is an explanatory diagram of a program loading method showing an application example of the present invention.

In Figure 5, multiple types of tables are defined in which load program names are registered (No, 1 to No, n).
Furthermore, an area 7 indicating the system number is provided, and the system is configured according to the load program name table (N o , m ) corresponding to the number (m) specified in the system number area 7. In this method, a table in which a plurality of types of load program names are registered is maintained in advance, so that the system can be modified and expanded simply by changing the value in area 7.

〔Effect of the invention〕

As explained above, according to the present invention, the load program name and program load information are stored in separate files,
Since the program loader loads the program registered in the load program name according to the program load information, there is an advantage that the system can be modified or expanded simply by changing or adding the load program name.

[Brief explanation of the drawing]

FIG. 1 is a processing flowchart of a program loader showing an embodiment of the present invention, FIG. 2 is a detailed diagram of load program name and program load information according to the present invention, and FIG. 3 is a program loader showing an embodiment of the present invention. FIG. 4 is a diagram showing a system configuration of the present invention, and FIG. 5 is an explanatory diagram of a program loading method showing an application example of the present invention. 1: Load program name file, 2: Program load information file, 4 Niprogram loader, 5: Memory, 6: Program storage file. 7: System No. Area.

Claims (1)

[Claims] (1) In a processing device equipped with a table in which the name of a program to be loaded is registered, a table in which load information for each program is registered, and a program loader that loads a program according to the data in the table, the name of the load program and the program Loading information is stored in a separate file, and by changing the contents of the loading program name table, the program loader loads the program registered in the changed program name table. method.