JPH02220143A - Personal computer system - Google Patents

Abstract

PURPOSE:To attain the self-diagnosis when a personal computer is connected to a local area network, etc., for execution of an on-line operation by carrying out a diagnostic mode even while a normal program of the personal computer is carried out when the diagnostic mode is selected for a diagnostic program. CONSTITUTION:In a diagnostic mode for the self-diagnosis, a program switch register 13 is switched to the diagnostic mode and the self-diagnosis is carried out with a diagnostic instruction of a diagnostic program memory part 12. Then the diagnostic state is diagnosed for a data processor 1A, a memory 2, and peripheral devices 31-3N respectively. These diagnostic results are stored in a diagnostic result holding register 15. At the same time, the contents of the expected value of an expected value store register 14 which is previously set via the part 1A are compared with the contents of the register 15 for analysis of both contents via a comparison/analysis circuit 16. Then the normal or abnormal state of each device is read out. Thus the self-diagnosis is attained for each component part.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a personal computer system, and particularly to a personal computer system equipped with a self-diagnosis function.

[Conventional technology]

A personal computer generally includes a microprogram-controlled data processing device, a storage device, peripheral devices, and the like. Conventionally, this type of self-diagnosis of personal computers has been performed only when the power is turned on. The content of the self-diagnosis is often limited to determining whether the personal computer is normal or abnormal.

[Problem to be solved by the invention]

In the conventional example in which self-diagnosis is performed only when the power is turned on, it is impossible to perform detailed diagnosis of each part within the personal computer. Furthermore, self-diagnosis is not possible when the computer is connected to a local area network and operates online.

On the other hand, reliability and maintainability have become important factors in systems constructed by combining a large number of personal computers.

Another disadvantage is that if the computer cannot be turned off while operating online, it is not possible to easily determine which part of the computer is having trouble.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to improve the disadvantages of the conventional system and to provide a personal computer system capable of self-diagnosing each component.

[Means to solve the problem]

The present invention includes a microprogram-controlled data processing device, and a storage device and peripheral devices attached thereto. Among these, the data processing device includes a data processing unit, a read-only program storage unit and a diagnostic program storage unit that control the data processing unit, and a program switch that determines whether the data processing device is controlled by any of these. A register, an expected value storage means that stores in advance the expected value of the diagnostic result output from the data processing device, a diagnostic result holding means that holds the actual diagnostic result, and these expected values and the diagnostic result are compared and analyzed. The system has a comparative analysis means. This aims to achieve the above-mentioned purpose.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

The embodiment shown in FIGS. 1 and 2 includes a microprogram-controlled data processing device 1, a storage device 2 and a peripheral device 313 attached thereto. ,... 3N and
It is equipped with an internal bus 4 that connects these. The data processing device 1 includes a data processing section IA and a read-only program storage section 11 that controls this data processing section.
and a diagnostic program storage unit 12, a program switch register 13 that determines which one of these will control the data processing device 1, and an expected value that stores in advance the expected value of the diagnostic result output from the data processing device 1. It includes an expected value storage register 14 as a storage means, a diagnostic result holding register 15 as a diagnostic result holding means for holding actual diagnostic results, and a comparison analysis circuit 16 that compares and analyzes these expected values and the diagnostic results. ing.

Among these, a program next address register 13A for executing the settings of the program switch register 13 is provided between the program switch register 13 and the read-only program storage section 11 and the diagnostic program storage section 12. Further, a multiplexer 21 is provided on the output side of the read-only program storage section 11 and the diagnostic program storage section 12. and,
The output of this multiplexer 21 is the data register 22
The data is inputted to the data processing unit IA via.

Multiplexer 21 connects program switch register 1
3, the entire system can be switched to normal mode or diagnostic mode. Further, the output of the data register 22 is also sent to the program next address register 13A mentioned above. This stabilizes the operation of the entire system that has been set up and is in operation.

Next, the operation of the above embodiment will be explained.

In the normal mode in which a normal program is executed, the program switch register 13 is set to the normal mode, and the data processing section 1A is controlled by the information in the read-only program storage section 11. When in the diagnostic mode for self-diagnosis, the program switch register 13 is switched to the diagnostic mode and the program is executed according to a diagnostic command stored in the first diagnostic program storage section 12. Then, the data processing device IA, the storage device 2, and the peripheral device 3. The diagnostic status of each of the 3N devices is diagnosed, and the results are stored in the diagnostic result holding register 15 that holds the diagnostic results. At the same time, data processing unit IA
The expected value contents of the expected value storage register 14 and the contents of the diagnostic result holding register 15, which have been set in advance through It has become.

〔Effect of the invention〕

As described above, according to the present invention, there are two types of programs, one for read-only and one for self-diagnosis, and when the diagnostic mode of the diagnostic program is selected, the diagnostic mode is also executed during normal program execution of the personal computer. This makes it possible to perform self-diagnosis even when the computer is connected to a local area network and operates online. Furthermore, it is an unprecedented and excellent feature that allows self-diagnosis to be performed without having to turn off the power. A personal computer system can be provided.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the present invention, and FIG. 2 is a block diagram showing a specific example of the data processing device portion of FIG. l...Microprogram control type data processing device, IA...data processing unit, 2...storage device, 3゜3
! , ~, 3N...Peripheral device, 11...Read-only program storage section, 12...Diagnostic program storage section, 13...Program switch register, 13A...
・Program next address register, 14...Expected value storage register, 15...Diagnostic result holding register,
16... Comparative analysis circuit.

Claims (1)

[Claims] (1) In a personal computer system comprising a microprogram control data processing device and a storage device and peripheral devices attached thereto, the data processing device controls a data processing section and the data processing section. a read-only program storage section and a diagnostic program storage section for self-diagnosis; a program switch register that determines whether the data processing device is controlled by either of them; A personal computer characterized by having an expected value storage means for storing expected values in advance, a diagnosis result holding means for holding actual diagnosis results, and a comparative analysis means for comparing and analyzing these expected values and the diagnosis results. system.