JPH01233526A - Data access and program calling system - Google Patents

Abstract

PURPOSE:To reduce data quantity and to effectively utilize a memory by constituting the title system so that designated data in other data file can be made to access from data for constituting one data file. CONSTITUTION:At first, a test is advanced in accordance with data in a first filing number, and when a data code is a read-out designation of the other data file B, the data file B is selected by the selection 5 of other data, and its data code is read. If its data code is not the read-out designation of the other data file, the processing of test data to the data file is carried out.

Description

[Detailed Description of the Invention] [Summary] Regarding a data access method in a computer system, the overall amount of data can be reduced by making specified data in another data file accessible from data constituting one data file. The purpose is to significantly reduce data by selecting data according to the program to be executed.
8. Reading the data code of the data, determining whether the content of the data code is a designation for reading other data, performing processing according to the data if it is not the designation, and the designation. If so, the designated data is selected and the operations after the data read are repeated.

[Industrial application field]

The present invention relates to data access and program calling in a computer system, and more particularly to a method for accessing test data for each device in a diagnostic program.

[Conventional technology]

In computer systems including personal computers, the amount of data and programs to be stored increases as the system becomes more complex, and the required memory capacity also continues to increase.

For example, in a diagnostic program that diagnoses the operation of each device that makes up a system, a data access method is used that selects one piece of diagnostic data that corresponds to the device to be diagnosed from among the diagnostic data created for each device. I was taking it. Even if this diagnostic data is for devices of the same type, there are some differences depending on the type of device, and separate data is created for each type. For example, the central control unit (C
If there are A, B, C, etc. as types of C), there are also types A, B, C, etc. in the diagnostic data for them.

[Problem to be solved by the invention]

For example, a conventional example of a flowchart of a diagnostic program as described above is shown in FIG. In the figure, when the diagnostic program is started, one of diagnostic data A, B, and C is selected depending on the type of central control unit (CC), for example. In the diagnostic program, first test data is read from diagnostic data A, for example, and processing is executed according to that data. Thereafter, the next test data reading and processing are repeated until the diagnosis is completed.

In this way, the diagnostic program first selects diagnostic data and performs a test using that data. However, in order to perform the same test on the same type of device, the selected diagnostic data contains other diagnostic data. The same test data as in the data may be included. A conventional example of the contents of such diagnostic data A, B, and C is shown in FIG. In the figure, each diagnostic data is, for example, 1 word of test data 1.
The test data 5 is the same as the diagnostic data A, B, and C, and the test data 3 and 4 are the same as the diagnostic data B and C. Since the same test data is stored redundantly in a large number of data files, the overall amount of data becomes extremely large, and there is a problem in that the memory used to store the data is used inefficiently.

The present invention aims to significantly reduce the overall amount of data and make effective use of memory by, for example, making data constituting one data file accessible to specified data in another data file. 1 purpose.

A second purpose is to make effective use of memory by allowing a program in one file to access a designated program in another file instead of data.

[Means and operations for solving the problem] FIG. 1(a) shows a functional block diagram of the present invention. First, a data file for a device to be diagnosed is selected for a program to be executed, for example, a diagnostic program. Each data in the diagnostic data file is test data for performing tests necessary for diagnosis, and has a data code section corresponding to the type of test. 2 reads the data code part,
In step 3, it is determined whether or not it is a read designation for another data file. If other data is not designated to be read, processing (test) is performed in accordance with the data in step 4. In the case of other data read designation, the data file designated by 5 is selected, and the operations after data code section read (2) are repeated for the data in that file.

FIG. 1fbl is a functional block diagram when the present invention is applied to a program instead of data, in which 11 is program (data) selection, 12 is instruction reading, 13 is determination of other program read designation, 14 is 15 is the execution of an instruction, and 15 is the selection of another program.This is the same as the case in Figure 1 (a) where the data is stored in the file, except that various programs are stored in the file. It is.

〔Example〕

As an embodiment of the present invention, an access method when there are three types of diagnostic data files, A, B, and C, will be described.

Figure 2 is an example of such a data file, with installation 2c.
At the end of the data file C for the device WB, a control word is provided that specifies the reading of the b part of the data file B for the device WB, and at the end of the data file B, a control word is provided that specifies the reading of the a part of the data file A for the device A. is provided.

In addition, the data read setting control word can be considered to be on the same level as the test data, that is, as a type of test data.

For example, a diagnostic program for device C using data in the format shown in FIG. 2 is shown in the flowchart of FIG. In the figure, first, data file C for device C is selected (step 1), and in step 2, the data code of the first test data is read. The data code corresponds to the instruction code in a program, and as mentioned above, the type of diagnostic test that should be performed using the test data, such as writing data in a register or clearing a channel. This designates the content, and the above-mentioned other data file read designation is also one type of this. In step 3, it is determined whether the data code specifies reading of another data file. If -No, processing is performed according to that test data, and if it is not the last test data, the Step 2.3 is repeated for 2 test data.

If the data code of the test data specifies reading of data file B in step 3, data file B is selected in step 4, and the data code of the first test data in the specified part is read in step 5. . It is determined in step 6 whether the data code designates reading of another data file or not. If NO, all data files C are processed (Similarly, the process according to the test data and the read of the next test data are repeated.

When it is determined in step 6 that data file A is to be read, data file A is selected in step 7, and the data code of the first test data in the specified part is read, and the same operation as described above is performed for the last test. It is repeated until the data is reached.

FIG. 4 shows an example of the structure of test data in each data file for implementing the data access method as described above. For example, the upper 4 bits of the L word, 32 bits, and bits “28° to 31°” are used as a data code (CNo.
), and for example, if the content of this code is "15°", it is considered "other data specification", and the content is "0" to "14".
Assign the case to other tests, such as reading register contents, etc. If the data code is “15°,” then the rest of the test data, bits “0” to “
The area up to 27° is divided appropriately, and the number of another data file (F i L No), the relative address of the read start data in the file (RADR), and the number of read words (WC) are shown.

FIG. 5 shows an example of the structure of a data file when one data file accesses another data file.

In the same figure, the test initially proceeds according to the data in file number '20', and the data code (CNo) is 15.
When the test data `` is reached, the relative address ``100'' is set within the file number ``30'' according to this test data.
The reading of data of the "50° word (hatched portion)" starts from "°".

As described above, in the present invention, even when it is necessary to provide data with the same content in multiple data files, the data is provided only in one data file, and the reading specification for the data is specified in other data files. It is characterized by the provision of a control word.

Incidentally, although the above embodiment has been explained regarding data, the case where a program is stored can be considered in exactly the same way. For example, if the data is 8 bits, one piece of data can take values from 0 to 255 (O to FFH), but if you look at the program at the machine language level, 3 bits
Considering in units of t, this ranges from 0 to 255 (O to FF,
).

Therefore, when considered at the machine language level, storing a program and storing data are the same.

〔Effect of the invention〕

According to the present invention, there is no need to provide the same data twice or triply in a plurality of data files, and the amount of data is significantly reduced. The same is true for programs, and as a result, memory can be used effectively.

[Brief explanation of the drawing]

FIG. 1(a) is a functional block diagram of the present invention, FIG. 1(b)
is a functional block diagram when the present invention is applied to a program instead of data, FIG. 2 is a diagnostic data file in the embodiment, FIG. 3 is a flowchart of the diagnostic program in the embodiment, and FIG. 4 is a diagram of the data in the data file. FIG. 5 is a configuration diagram of an example data file; FIG. 6 is a flowchart of a conventional diagnostic program; and FIG. 7 is a configuration diagram of a conventional data file. 1...Selection of data, 2...Reading of data code, 3...Determination of other data read designation, 4...Processing according to data, 5...Selection of other data.

Claims (1)

[Claims] 1) Selecting data according to a program to be executed (1) and reading the data code of the data (
2), determining whether the content of the data code is a read specification for other data (3), performing processing according to the data if it is not the specification (4), and the specification. A data access method characterized in that specified data is selected (5) when the data code is read (2) and the operations after the data code read (2) are repeated. 2) selecting a program to be executed (11);
reading the instructions constituting the program (12);
), determining whether or not the content of the instruction is a specification for calling another program; (13) executing the instruction if the specification is not specified; and (14) executing the specified program if the specification is specified. (15) and repeats the operations after the instruction read (12).