JPH03294932A - Computer diagnostic device - Google Patents

Abstract

PURPOSE:To eliminate the need for the development of a computer diagnostic program by comparing the result of execution of a computer to be diagnosed with the expected value of a result obtained by inferring a logical expression for showing the transfer expression of a register of a microprogram of a computer with regard to an arbitrary instruction, and displaying its result on a screen. CONSTITUTION:An inference means 9 infers a logical expression for showing the transfer expression of a register of a microprogram of a computer 1 to be diagnosed, outputs the result of inference, and on the other hand, the computer 1 to be diagnosed outputs the result of execution by setting input data as an instruction or data. The result of inference of the inference means 9 and the result of execution of the computer 1 to be diagnosed are transmitted to a comparing device 11, respectively. The comparing device 11 compares this result of inference with the result of execution, outputs the result of comparison to a result display device 5, and the result display device 5 displays this result of comparison on the screen. In such a manner, an arbitrary pattern can be tested and the development of a computer diagnostic program is eliminated.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] This invention relates to a computer diagnostic device for diagnosing whether a computer is operating correctly.

[Prior Art] Conventionally, a device having a configuration as shown in FIG. 2 has been used to diagnose whether a computer is operating properly. In the figure, (1) is the diagnosed combination, -1, (2)
itc PU, (3) is +! Mo'J, (4) LLI/
O board, (5) is a result display device, and (13) is a microcomputer.

Next, the operation will be explained. Microcomputer (1
3) loads a computer diagnostic program into the memory (3) via the I/O board (4). Next, the microcomputer (13) sends a program execution start signal to the CPU (2) via the I/O board (4) to start the computer diagnostic program. The computer diagnostic program compares the execution result of the CPU (2) with the expected value on the program loaded onto the memory η and transmits the result to the microcomputer (13) via the I/O board (4). Microcomputer (1
3) converts the results into a displayable format and sends them to the result display device (5). The result display device (5) displays the results on the screen and diagnoses the operation of the computer to be diagnosed (1). Ta.

[Problems to be Solved by the Invention] Conventional computer diagnostic equipment performs diagnosis by running seven diagnostic programs, so only a predetermined pattern can be tested. There was a problem in that the expected value according to the transfer expression had to be created and incorporated into the diagnostic program in advance.

[Means for Solving the Problems] A computer diagnostic device according to the present invention includes a rule base memory that stores computer arithmetic methods such as register transfer expressions of microprograms as logical expressions, and a rule base memory that stores logical expressions on the rule base memory. an inference means for inference corresponding to input data; an I/O board for outputting an inference result;
A comparison device is provided to compare the inference result output by the I/O board with the execution result of the computer to be diagnosed.[Operation] In this invention, the execution result of the computer to be diagnosed and the computer's micro A computer is diagnosed by comparing a logical expression representing a register transfer expression of a program with an expected value as a result of inference, and displaying the result on the screen.

[Example] FIG. 1 is a diagram showing the configuration of an apparatus according to the present invention.
1) to (5) indicate the same or equivalent parts as the above conventional device. (6) is a data generation device that generates data that is executed by the computer to be diagnosed and used as input for inference by the inference means; (7) is a data generation control device that is used to start the data generation device; (8) is a rule-based memory that stores computer calculation methods such as microprogram register transfer expressions as logical expressions, (9)
is an inference means for inferring logical formulas on rule-based memory,
(IQ) is an I/O board (11) for outputting the inference result of the inference means, and a comparison device (12) for comparing the execution result of the computer to be diagnosed with the inference result output by the I/O board is the main unit. This is a connector used to connect a computer diagnostic device according to the invention and a computer to be diagnosed.

Next, the operation will be explained. Data generation control device (7)
starts the data generator (6). Data generator (
When activated, 6) generates random data within the total number of memory words of the computer to be diagnosed, data consisting of input/output instructions of the computer to be diagnosed, and finally data including an instruction to stop the computer to be diagnosed. . Said data is sent to the inference means (9). The data is also sent to the computer to be diagnosed (1). The inference means infers a logical formula stored in a rule base memory (8) in which rules representing arithmetic methods such as transfer expressions of registers of a microprogram of a computer to be diagnosed are stored in accordance with the input data, and outputs an inference result. On the other hand, the computer to be diagnosed outputs an execution result using the input data as a command or data. The inference result of the inference means is I
It is sent to the comparison device (11) via the /O board (/O). On the other hand, the execution results of the computer to be diagnosed are also transmitted to the comparison device. The comparison device compares the inference result and the execution result and outputs the comparison result to the result display device (5). The result display device displays the comparison results on the screen.

[Effects of the Invention] As described above, according to the present invention, an arbitrary pattern can be tested, and there is no need to develop a computer diagnostic program.

[Brief explanation of the drawing]

FIG. 1 shows the configuration of a device according to the present invention, and FIG. 2 shows the configuration of a conventional device. (1) is the computer to be diagnosed, (2) is the CPU, (3) is the memory (4) is the I/O
board, (5) is a result display device, (6) is a data generation device, (7) is a data generation control device, (8) is a rule base memory, (9) is an inference means, (/O) is an inference result I/O board used for output, (/O is a comparison device, (12) is a connector for connecting the computer diagnostic device according to the present invention and the computer to be diagnosed,
(13) indicates a microcomputer. Note that the same reference numerals in the two figures indicate the same or corresponding parts.

Claims (1)

[Claims] A data generation control device that generates control signals, a data generation device that receives control signals from the data generation control device and generates data, and rules that store computer calculation methods such as register transfer expressions of microprograms as logical expressions. a base memory, an inference unit that inputs data from the data generation device and performs inference corresponding to the input data based on rules on the rule base memory, an I/O board that outputs the inference result of the inference unit, and the inference A comparison device that compares the inference results and execution results input from an I/O board that outputs the results and the computer to be diagnosed and outputs the comparison results, a result display device that inputs the comparison results from the comparison device and displays the results, and A computer diagnostic device comprising a connector for connecting a diagnostic computer to the comparison device and the data generation device.