JPS62115557A - Bootloading system of program - Google Patents

Abstract

PURPOSE:To attain bootloading even when an optional number of files exist by providing a load designation file to an external auxiliary storage device to decide the file name of a file having an execution program optionally. CONSTITUTION:When a bootloading program stored in a ROM 3 of a main storage device is started, a load designation file stored in any of external auxiliary storage devices 4-1-4-n is retrieved and the result is read in a RAM 2. Then the first command of the load designation file read is extracted and whether or not the data is END is judged, and when it is not END, the first command is analyzed and the file name is obtained. Then the file is retrieved by the devices 41--4-n, read on the RAM 2 and this operation is repeated until the command is judged to the END. When the END is judged, the bootloading program executes an execution program. Thus, even when an optional number of files exist, the bootloading is attained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a bootload method in which an execution program is loaded from an external auxiliary storage device into a main storage device and executed.

[Conventional technology]

Figure 1 is a block diagram showing a device that realizes the conventional bootloading method. In Figure 1, 1 is a central processing unit (hereinafter referred to as CPU), and 2 is a main memory that stores execution programs and data. Random access memory section (hereinafter referred to as RAM section) of the device; 3 is a read-only memory section (hereinafter referred to as ROM section) of the main storage device in which a boot load program for performing boot loading is stored;
%4-1 to 4-n are external auxiliary storage devices. Also,
FIG. 4 is a flow chart diagram of the boot load program.

Next, the operation will be explained. When the boot load program stored in the ROM section 3 of the main storage device is started, in step 4A, it searches for a predetermined file name from the external auxiliary storage devices 4-1 to 4-n. In step 4B, it is determined whether the file exists or not. If only it existed.

In step 4C, the execution program is loaded onto the RAM section 2 of the main storage device from the file. When the loading of the execution program is completed, the loaded execution program is executed in step 4D. If it is determined in step 4B that the relevant file does not exist, then in step 4E the boot load program? End 0 [Problems to be solved by the invention] Since the conventional boot loading method was performed using the steps described above, the file name of the file containing the executable program had to be determined in advance, and the It is necessary to keep it in the α-do program, and when it is desired to change the file name of the file containing the executable program, problems often arise, such as having to change the boot a-do program.

This invention was made with the aim of solving the above problems, and allows the file name of the file containing the executable program to be arbitrarily determined. ! 7't, the objective is to obtain a bootloading method that allows bootloading even if there are an arbitrary number of files.

[Means for Solving the Problems] The bootloading method according to the present invention creates an α-code designation file Nf in advance in an external auxiliary storage device that describes the file name of the file in which the executable program to be loaded is stored. Then, the boot load program reads the load specification file and searches the external auxiliary storage device for the file name of the execution program's detailed file written therein.

The execution program is loaded into the main storage device from the searched file and executed.

[Effect]

The program bootloading method in this invention is to create a load specification file in advance that describes the file name of the file containing the executable program, and then read the load specification file. Phi A with
It is something that can be known.

〔Example〕

Figure Wc1 is an example of a device for realizing a puto-a-do bank according to the present invention, and the configuration of the device is the same as that of the conventional device. Figure 2 is a flowchart of a bootload program that realizes the bootload method according to the present invention. FIG. 3 is an explanatory diagram of a load designation file that describes the file name of the file containing the execution program.

This load specification file describes the file name of the file containing the executable program to be loaded.

At the end, an 'END' mark is written indicating that there are no more files to load.

Next, the operation will be explained. When the boot load program stored in the ROM section 3 of the main storage device is started, the two people in the step execute the external auxiliary storage devices 4-L to 4-
Search for an a-word specified file stored in any one of n. Once the load specification file is found, proceed to step 2B.

The load designation file is read into the RAM section 2 of the cash storage device. Next, in step 2C, the first command 3A is extracted from the load specification file. Step 2D
Determine whether the data is 'END' by
If not END', proceed to step/'2E. Analyze the command extracted in step 2E and obtain the file name. In step 2F, save the file to external auxiliary storage device 4-
1 to 4-n, and in step 2G, the corresponding file is read onto the RAM section 2 of the main storage device. When reading is completed, the next command is extracted in step 2H. Then, return to step 2D. Then step 2E, 2
Repeat F, 2G, 2H, 2D.

If "END" is determined in step 2D, the boot load program executes the execution program.

As an embodiment of the present invention, a case has been shown in which a file containing an executable program is loaded, but this may also be a data file containing data.

〔Effect of the invention〕

As described above, according to the present invention, a load specification file /l/ is created in which the file name f of the file containing the executable program to be loaded is written, and the executable program to be loaded from the file 7 is created. Know the file name of the file that contains the file, and read the corresponding executable program file.
I took the money to get it out.

This has the effect that when the file name or number of files containing an executable program is changed, it can be easily handled by simply re-creating the entire load specification file.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an example of a device implementing the present invention. FIG. 2 is a flowchart of a boot load program of the present invention. FIG. 8g3 is an explanatory diagram showing an example of the contents of a load specification file. FIG. 4 is a flow chart diagram of a conventional boot load program. 1 is a CPo, 2 is a RAM section of the main storage device, 3 is a ROM section of the main storage device, and 4-1 to 4-n are external auxiliary storage devices. Patent applicant: Mitsubishi Electric Corporation - Patent attorney: 1) Hiroshi Sawa'
(2 others) ' BOOT, CSD

Claims (1)

[Claims] The file name of the execution program to be boot loaded is registered in advance in a load specification file, and when the execution program is loaded from the external auxiliary storage device to the main storage device, the file name of the execution program to be loaded is registered from the load specification file. A program boot loading method reads the file, searches the file, and loads the execution program from the searched file into the main storage device.