JPH01315841A - Information processor - Google Patents

Abstract

PURPOSE:To ensure the execution starting of a fault information picking-up program and to simply attain the analysis at the time of the fault occurrence by selecting and processing a special program condition displaying word to display the start of the fault information picking-up program as a special program. CONSTITUTION:A register 5 as a storing means stores a special program condition displaying word to display the start of a fault picking-up program as a certain special program, and simultaneously, the effect that the word is stored is held at a flip flop 6. A detecting means 7 detects whether the flip flop 6 is in the holding condition in accordance with the instruction from an external part or not. A selecting means 8, when the flop is in the holding condition as the result of detection, selects a special program condition displaying word from the register 5, and at the time of the non-holding condition, selects a program condition displaying word from a condition generating means 1 respectively and outputs it to an instruction processing means 3. Thus, the fault picking-up program is surely executed, the trouble information is picked up and the fault analysis can be easily executed.

Description

[Detailed description of the invention] [Industrial application field] INDUSTRIAL APPLICATION This invention is utilized for failure information collection of an information processing apparatus.

The present invention relates to an information processing device, and particularly to an information processing device that securely collects failure information and simplifies failure analysis.

〔overview〕

The present invention provides an information processing apparatus that sequentially processes software instructions in accordance with instructions of a program status indication word that indicates the execution status of a program. By making it possible to select and process a specific program status display that indicates the start of the failure information collection program as a specific program, the execution start of the failure information collection program is ensured and analysis when a failure occurs. It is designed to be easy to do.

[Conventional technology]

Generally, an information processing device may stall due to an error in a software program. In order to know the cause of this problem, it is necessary to run a special program to collect failure information. Conventionally, one method has been to display the program status in main memory at the command of the information processing equipment operator. In some cases, the execution of a special program specified by the word, ie, a failure information collection program, was started.

FIG. 2 is a block diagram showing the main parts of an example of a conventional information processing device, including a state generation circuit 1, a first state register 2, and a first state register 2.
, a software instruction processing section 3 and a first selection circuit 4.

The program status display word includes the operating mode of the information processing device when executing the program, that is, the software instruction, and the address of the main memory where the software instruction is stored. It is assumed that the display word includes only a main memory address (not shown) where a software instruction is stored, that is, a software instruction storage address. Further, it is assumed that the program status display word indicating the start of the program, and actually the software instruction storage address, is stored in the main memory (not shown).

The program is executed as shown below. First, at the start of program execution, a software instruction storage address indicating the first software instruction is read from a main memory (not shown) and supplied to the input line 11.

At the start of program execution, the first selection circuit 4
1 is selected, and the software storage address is supplied to the first status register 2 via the output 21.

The first status register 2 is set to
The output 21 of the first selection circuit 4 is loaded.

The output 22 of the first status register 2 is supplied to the software instruction processing unit 3, and the software instruction processing unit 3 processes the first software instruction pointed to by the software instruction storage address in the first status register 2. The output 22 of the first status register 2 is further supplied to the status generation circuit 1, and the status generation circuit 1 updates the software instruction storage address to point to the software instruction to be executed next.

The output 23 of the state generation circuit 1 is supplied to the first selection circuit 4, and as described above, the first selection circuit 4 selects the human power line 11 when the program execution starts, but when the program execution is not started, that is, When software instructions in a program are being executed continuously, the output 23 of the state generation circuit 1 is selected. Therefore, first status register 2
is always loaded with the software instruction storage address of the software instruction to be executed next.

Since the software instruction processing unit 3 processes the software instruction pointed to by the software instruction storage address in the first status register 2, the A software instruction storage address in one status register 2 is updated by the status generation circuit 1 every time the execution of a software instruction is completed, and the software instructions are sequentially processed by the software instruction processing section 3.

[Problem that the invention seeks to solve]

In the conventional information processing device described above, the program status display word of the fault information collection program is stored in the main memory, so if the program status display word is destroyed due to an error in the program being executed, the fault information collection program cannot be executed. This had the disadvantage that failure analysis was difficult.

An object of the present invention is to prevent the destruction of program status display words by eliminating the above-mentioned drawbacks, to reliably execute a fault information collection program, to collect fault information, and to provide information that allows easy fault analysis. The purpose of this invention is to provide a processing device.

[Means for Solving the Problems] The present invention provides a state generation means for generating a program status indication word indicating the execution status of a program, and an instruction processing means for sequentially processing software instructions according to instructions of the program status indication word. an information processing device comprising: storage means for storing a specific program status indicator word indicating the start of a specific program; a holding means for holding, and a detection means for detecting whether the storage means is in a holding state according to an external instruction;
As a result of the detection, when it is in the holding state, it selects a specific program status display word from the storage means, and when it is in the non-holding state, it selects the program status display word from the state generation means and outputs it to the instruction processing means. The present invention is characterized by comprising a selection means for selecting.

[Effect]

The storage means, for example a register, stores a specific program status indicator word indicating the start of a fault collection program as a specific program. At the same time, this stored information is held in a holding means, for example a flip-flop. Then, the detection means detects whether the flip-flop is in the holding state according to an instruction from the outside. The selection means selects a specific program status display word from the register when the detection result is in a holding state, and selects a program state display word from the state generation means when the detection result is in a non-holding state, and sends the selected program state display word to the instruction processing means. Output.

Therefore, the specific program status display word is stored separately from the main memory, and an error in the program being executed may destroy the specific program status display word that indicates the start of the failure collection program. Therefore, it becomes possible to reliably execute the fault collection program, collect fault information, and easily perform fault analysis.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing the main parts of an embodiment of the present invention.

This embodiment includes a state generating circuit 1 as a state generating means for generating a program status indicating word indicating the execution state of a program, and a state generating circuit 1 as an instruction processing means for sequentially processing software instructions according to instructions of the program status indicating word. In an information processing device comprising a status register 2 and a software instruction processing unit 3, a second status register 5 serves as a storage means for storing a specific program status display word that indicates the start of a fault collection program as a specific program. , a flip-flop 6 as a holding means for holding an indication that the specific program status display word is stored in the second status register 5;
A detection circuit 7 as a detecting means for detecting whether or not is in a holding state, and as a result of the detection, when it is in a holding state, it selects a specific program state display word from the second status register 5, and when it is in a non-holding state, it selects a specific program state display word. A second selection circuit 8 is provided as selection means for selecting a program status display word from the status generation circuit 1 and outputting it to the first status register 2. Note that 4 is a first selection circuit.

A feature of the present invention is that in FIG.
, a flip-flop 6, a detection circuit 7, and a second selection circuit 8 are provided.

Next, the operation of this embodiment will be explained. Note that although the following explanation will mainly focus on the processing of the failure information collection program, which is an operation unique to this embodiment, other operations will be explained in the second section.
This is similar to the conventional example shown in the figure.

First, when initializing the software, the software instruction storage address of the first software instruction of the fault information collection program is loaded into the second status register 5 by a software command via the human power line 12, and then Set flip-flop 6 to "1". In addition,
The flip-flop 6 is at "0" when the information processing device is in the reset state. In addition, the human power line 1 of the detection circuit 7
4 is connected to a specific switch on the information processing device operation panel (not shown), and becomes "1" when the operator presses the specific switch on the operation panel. The detection circuit 7 sets the output 25 to "1" when both the human power lines 13 and 14 are "1", and sets the output 25 to "1" when the input line 13 or 14 is "0".
0".

The second selection circuit 8 is supplied with the output 26 of the second status register 5 and the output 21 of the first selection circuit 4, and when the output 25 of the detection circuit 7 is "0", the second selection circuit 8 is connected to the first selection circuit 8. Output 21 of selection circuit 4 is selected and output 2 of detection circuit 7 is selected.
5 is "1", the output 26 of the second status register 5 is selected.

Therefore, when the output of the detection circuit 7 is "0", the second selection circuit 8 selects the output 21 of the first selection circuit 4.
The same operation as the conventional example shown in FIG. 2 described above is performed. The first status register 2 is connected to the second selection circuit when the program starts executing as described in the conventional example, and every time the execution of a software instruction in the program ends, and also when the output 25 of the detection circuit 7 is "1". Load the contents of output 27 of 8. When the output 25 of the detection circuit 7 is "1", the second selection circuit 8
selects the second status register 5, so the software instruction storage address of the first software instruction of the fault information collection program set by the software instruction at the time of software initialization is loaded into the first status register 2.

Therefore, when a failure occurs in the information processing apparatus, if the operator presses a specific switch on the information processing apparatus operation panel, the program being executed is interrupted and the execution of the failure information collection program is started.

〔Effect of the invention〕

As described above, the present invention prevents the program status display word of the first software instruction of the fault information collection program from being destroyed due to an error in the running program by adding a small amount of hardware, and thereby prevents the failure information collection program from being destroyed. This has the effect of being able to start execution reliably and simplifying analysis when a failure occurs.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the main parts of an embodiment of the present invention. FIG. 2 is a block diagram showing the main parts of a conventional example. DESCRIPTION OF SYMBOLS 1... State generation circuit, 2... First state register, 3
... Software instruction processing unit, 4... First selection circuit, 5... Second status register, 6... Flip-flop, 7... Detection circuit, 8... Second selection circuit, 11 ~
14...Input line, 21-27...Output.

Claims (1)

[Scope of Claims] 1. Status generating means (1) for generating a program status indicating word indicating the execution status of a program; and instruction processing means (2) for sequentially processing software instructions according to instructions of the program status indicating word. 3), a storage means (5) for storing a specific program status indicator word indicating the start of a specific program; and a storage means (5) in which the specific program status indicator word is stored. a holding means (6) for holding an indication that the storage means is in the holding state; a detection means (7) for detecting whether or not the storage means is in the holding state according to an external instruction; Selection means (8) for selecting a specific program status indicating word from the means, and selecting a program status indicating word from the status generating means when in a non-holding state, and outputting the selected program status indicating word to the instruction processing means. An information processing device characterized by: