JPH0351923A - Trouble diagnostic device - Google Patents

Abstract

PURPOSE:To confirm the updated trouble diagnostic state of the updated trouble diagnostic data on an optional address stored in a main storage without rewriting a program stored in the main storage by using an address search interruption. CONSTITUTION:The address of the trouble diagnostic data 2 is sent to a search address register 9 from a measuring device 5. An address coincidence detecting part 10 detects the coincidence secured between the address pointed by a memory address part 6 and the address pointed by the register 9 and produces an address coincidence interruption after the data 2 is updated. The program control is shifted to a trouble diagnostic state confirming program 4 by a trouble diagnostic state confirmation request instruction 8. The program 4 receives the trouble diagnostic data from the device 5 and confirms the trouble diagnostic state of the trouble diagnostic data. Thus it is not required to rewrite the next instruction 7 into the instruction 8 and therefore the trouble diagnostic state of the updated trouble diagnostic data on an optional address stored in a main storage 1 can be confirmed in real time without rewriting a program stored in the storage 1.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is, for example, in a computer system that performs real-time control using a computer, in which a program in the main storage device is used to check the failure diagnosis status after updating the failure diagnosis data. The present invention relates to a method and apparatus for checking a failure diagnosis state in real time without rewriting.

[Conventional technology]

As shown in Figure 3, the conventional device (1) is the main memory of the computer, (2) is the fault diagnosis data to be updated,
(3) is a fault diagnosis data update command that updates the fault diagnosis data (2), (4) is a fault diagnosis state confirmation program that confirms the fault diagnosis state, and (5) is controlled by the fault diagnosis state program (4). (6) is a memory address section that displays the address of the fault diagnosis data being updated; (7) is the next fault diagnosis data update command executed after the fault diagnosis data update command (3); It was made up of commands.

As shown in Figure 4, in the conventional method, prior to checking the status of failure diagnosis for testing and confirmation of processing, the next command (7) is issued to request failure diagnosis status confirmation to start the failure diagnosis status confirmation program (4). As a result, after executing the fault diagnosis data update command (3), control of the program is transferred to the fault diagnosis state confirmation program (■ in the figure). ) receives fault diagnosis data that should be in a state for processing testing and confirmation from the measuring device (5), and confirms the state of the fault diagnosis data (■ in the figure).

[Problem to be solved by the invention]

However, in conventional computer systems, in measuring devices that check the failure diagnosis status, it is necessary to rewrite the next instruction (7) that is executed after the failure diagnosis data update instruction (3) (■ in the figure). By rewriting Directive (7), the program may not operate correctly. Furthermore, each time the address of the fault diagnosis data (2) is changed, the address of the fault diagnosis data update command (3) also changes. Accordingly, the next instruction (7) is rewritten. Furthermore, if the main memory M (11) storing the instructions is a non-rewritable read-only memory, it becomes impossible to rewrite the next instruction (7), and the failure diagnosis after executing the failure diagnosis data update instruction (3) There was a problem in that it became impossible to check the status of the data.

Therefore, this invention was made to solve such problems, and it is possible to read any address in the main memory (1) measured from the outside without rewriting the instructions in the main memory (1). The purpose is to check the failure diagnosis status in real time after updating the failure diagnosis data.

[Means to solve the problem]

In order to achieve such an object, the present invention includes a memory address section that indicates the address of fault diagnosis data being updated in a computer system, and a memory address section in which the fault diagnosis data is used to confirm the fault diagnosis state after updating the fault diagnosis data. An address match occurs when the address specified by the search address register that stores an address in the main memory as a measurement address matches the address specified by the search address register and the address specified by the memory address section. An address match detection unit that generates an interrupt, a fault diagnosis state confirmation program for confirming a fault diagnosis state after updating the fault diagnosis data of the measurement address, and a measuring device controlled by the fault diagnosis state confirmation program. The fault diagnosis state after the fault diagnosis data of the measurement address has been updated is confirmed using the address match interrupt generated from the address match detection section.

[For production]

In this invention, since the address matching interrupt is used to issue a fault diagnosis state confirmation request to the fault diagnosis state confirmation program (4), each time the address of the fault diagnosis data changes, the next instruction (7) is sent to the fault diagnosis state check program (4). There is no need to rewrite the confirmation request command. In addition, even if the main memory (1) that stores instructions is a read-only memory that cannot be rewritten, address match interrupts are possible, and it is also possible to check the failure diagnosis status after updating the failure diagnosis data (3). become.

〔Example〕

FIG. 1 is a configuration diagram showing an embodiment of a measuring device for checking the status of failure diagnosis data of a computer system according to the present invention. In the figure, (1) to (8) are completely the same as the conventional device described above. This will be explained in detail below using examples. (9) is a search address register that stores the address in the main memory where failure diagnosis data (2) is stored as a measurement address for measurement using the address match interrupt function; an address match detection unit that generates an address match interrupt when the address specified by the address register and the address specified by the memory address unit match; (Ill is an address match interrupt response executed when an address match interrupt occurs; Consists of addresses.

FIG. 2 is a diagram illustrating a processing method of an embodiment of a measurement device that checks the status of failure diagnosis data of a computer system having the above configuration. In the figure, before checking the status, a fault diagnosis status confirmation request command (8) is prepared at the address match interrupt response address {11}. Then, the address of the fault diagnosis data (2) is sent from the measurement device (5) to the search address register (9) (■ in the figure), and after the fault diagnosis data (2) is updated, the address matching detection section is sent to the memory address section ( 6) detects that the address specified by the search address register (9) matches the address specified by the search address register (9), and generates an address match interrupt. In the address match interrupt response address (11) that is updated when an address match interrupt occurs, there is a fault diagnosis state confirmation request instruction (8) that branches to the fault diagnosis state confirmation program. As a result, after the address match interrupt occurs, control of the program is transferred to the fault diagnosis status confirmation program (4). The fault diagnosis status confirmation program (4) is the measurement equipment w (
5) Receive the fault diagnosis data to be in the state (as shown in the figure) z3 to confirm the fault diagnosis state of the fault diagnosis data.

〔Effect of the invention〕

This invention {as explained above, by using the address search interrupt, the failure diagnosis state after updating the failure diagnosis data of any address in the main memory of a computer can be determined without rewriting the program in the main memory. This has the effect of allowing you to readily admit N.

[Brief explanation of drawings]

FIG. 1 is a diagram showing an embodiment of the present invention, FIG. 2 is a diagram showing a status confirmation means in the other invention, and FIG. 3 is a measuring device for confirming the failure diagnosis status of failure diagnosis data in a conventional computer system. FIG. 4 is a diagram showing a procedure for checking the failure diagnosis status of a measuring device for checking the failure diagnosis status of failure diagnosis data in a conventional computer system. In the figure, (1) is the main storage of the computer; (2) is failure diagnosis data, (3) is failure diagnosis data update instruction, (4
) is the fault diagnosis status confirmation program, (5) is the measuring device, (6) is the memory address section, (7) is the next instruction, (8)
is the fault diagnosis state f! (9) is a search address register, (9) is an address match detection unit, and (9) is an address match interrupt response address. In each figure, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Claims] A memory address section indicating the address of fault diagnostic data being updated in the computer system, and an address in the main storage where the fault diagnostic data is stored in order to confirm the fault diagnostic state after updating the fault diagnostic data. a search address register stored as an address for use in the measurement; an address match detection unit that generates an address match interrupt when an address specified by the search address register matches an address specified by the memory address section; and a fault diagnosis state confirmation measurement device that is controlled by a fault diagnosis state confirmation program for confirming the fault diagnosis state after update of the fault diagnosis data of the address.