JPH0581089A - Electronic equipment - Google Patents

Abstract

PURPOSE:To reserve data at a program position and in a memory at the system error generation as a record even when restarting the system by turning on a reset switch after the system error generation. CONSTITUTION:When a program is restarted by turning on the reset switch, the presence or absence of the system error generation is judged by the state of a system error flag. In the presence of a system error generation, each storage content of the program RAM and the data RAM is automatically recorded on the hard disk, then advanced to the normal operation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a central processing unit (hereinafter,
CPU, abbreviated as read only memory (hereinafter R)
The present invention relates to an electronic device including an external storage device such as an OM), a random access memory (hereinafter abbreviated as RAM), a floppy disk or a hard disk.

[0002]

2. Description of the Related Art Generally, an electronic device has a CPU when a system error occurs due to a program error, a memory error, or the like.
Is configured to forcibly stop the execution of the program and prevent the memory destruction due to the program runaway.

In such a situation, it is possible to restart the system by turning on the reset switch or turning on the power switch again. However, when the system is restarted, the program is restarted from the beginning, so the program position at the time of system error and the data in memory cannot be recorded, and it is difficult to analyze the cause of the system error later. Met.

Therefore, conventionally, an electronic device has been put into practical use in which the memory contents at the time of occurrence of a system error can be written in an external storage device such as a floppy disk or a hard disk. However, in order to exert this function, special operations such as turning on a dip switch or inputting a predetermined command, which can be performed only by maintenance personnel having specialized knowledge, were required.

[0005]

As described above, it is very important to record the program position and the data in the memory as a record when a system error occurs in order to analyze the cause of the system error. Special operation of a knowledgeable maintenance worker is required, and waiting for it will reduce the system operation rate, so simply restart the system by turning on the reset switch or turning on the power switch again. It was the actual situation.

Therefore, according to the present invention, even if the system is restarted without performing a special operation after a system error occurs,
It aims to provide an electronic device that can record the program position and the data in memory when a system error occurs, and can easily analyze the cause of a system error without lowering the operating rate. is there.

[0007]

According to the present invention, there is provided a program memory for storing program data, a central processing unit for controlling each section based on the program data stored in the program memory, and processing by the central processing unit. Error determining means for determining whether or not a system error has occurred in an electronic device including a data memory for storing various data to be stored and an external storage means for writing data under the control of a central processing unit, and this determining means When it is determined that a system error has occurred, an error information recording unit for recording the stored contents of the program memory and the data memory in the external storage unit is provided.

[0008]

With the electronic apparatus configured as described above, when a system error occurs due to an abnormal program memory, the stored contents of the program memory and the data memory are automatically written to the external storage means.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram of the present embodiment. 1 is a CPU (central processing unit) that constitutes the main body of the control unit, and 2 is a ROM (read / write) that stores a program for system startup.
Only memory), 3 is a program R in which program data for the CPU 1 to control each unit is written
AM (random access memory), 4 is the CPU
1 is a data RAM having various memory areas for temporarily storing data to be processed. RAM for the above data
A system error flag F, which is set when a system error occurs, is set in 4. It is assumed that neither the program RAM 3 nor the data RAM 4 is backed up by power supply.

Reference numeral 5 is a keyboard controller for controlling a keyboard 6 provided with various data input keys, 7 is a display controller for driving and controlling a display device 8 to display characters or the like corresponding to display data, and 9 is a record. A hard disk controller that controls a hard disk device 10 that writes and reads data to and from a hard disk as a medium, and 11 a floppy disk device 12 that writes and reads data to and from a floppy disk as a recording medium.
Is a floppy disk controller for controlling the device, 13 is a communication interface for controlling data communication with an external host device, and 14 is an I / O port to which a signal of the reset switch 15 is input.

The CPU 1, the ROM 2, the program RAM 3, the data RAM 4, the keyboard controller 5, the display controller 7, the hard disk controller 9, the floppy disk controller 11, the communication interface 13 and the I / O port 14 are connected to the bus line 1
Connected by 6.

The program RAM 3 constitutes a program memory for storing program data, and the data RAM 4 constitutes a data memory for storing various data processed by the CPU. Further, the hard disk device 10 and the floppy disk device 12 constitute an external storage means in which data is written under the control of the CPU 1.

The CPU 1 is configured to execute the control shown in FIG. 2 by turning on a power switch (not shown) or inputting an ON signal to the reset switch 15.

That is, first, according to the program for system startup stored in the ROM 2, the program R
AM3, data RAM4 self-diagnosis test, various controllers 5, 7, 9, 11, communication interface 1
3. Perform a self-diagnosis test of the I / O port 14. If the results of the various self-diagnosis tests are normal, the state of the system error flag F set in the data RAM 4 is determined. (Error determination means)

If the error flag F is not in the set state, the initial program load process (hereinafter abbreviated as IPL process) is executed. That is, the hard disk device 10 or the proppy disk device 1
The program data pre-recorded in 2 is read out and stored in the program RAM 3.

On the other hand, when the error flag F is in the set state, the program RAM 3 and the data RA
The storage contents of M4 are recorded in the hard disk device 10. (Error Information Recording Means) After that, the system error flag F is reset and the IPL processing is started.

When the IPL processing is completed, the self-diagnosis processing such as data check is further performed according to the program written in the program RAM 3 by the IPL processing, and then the normal operation is started.

When a program error or memory error occurs during execution of this normal work and a system error occurs, a system error flag F is set in the data RAM 4 and an error code indicating the system error is displayed on the display 8. After that, it is configured to forcibly stop the program.

In the present embodiment thus constructed, when a system error occurs during execution of normal business, the system error flag F is set and a predetermined error code is displayed on the display unit 6, and then the program is executed. Is forcibly stopped.

When restarting the system from this state, the operator turns on the reset switch 15. Then, first, a self-diagnosis test of each RAM and each I / O controller is performed according to the system startup program stored in the ROM 2. If the result of this self-diagnosis test is normal, the system error flag F is in the set state, and therefore the program RAM 3
Also, the storage contents of the data RAM 4 are recorded in the hard disk device 10. That is, the program position and the data content at the time when the system error occurs are automatically recorded in the hard disk device 10.

After that, the system error flag F is reset and the IPL processing is performed. After the self-diagnosis processing loaded by the IPL processing is performed, the normal operation is resumed.

As described above, according to the present embodiment, even if the system is down due to the occurrence of a system error, the reset switch 15 is simply turned on to restart the system, and the program R at the time of the system error occurs.
The storage contents of the AM 3 and the data RAM 4 can be left as a record in the hard disk device 10. As a result, the cause of the system error can be easily determined by later analyzing the recorded contents of the hard disk device 10 by a person having specialized knowledge without lowering the operating rate of the system.

In the above embodiment, the program RAM 3 and the data R 3 are used when the system is restarted after the system is down.
The case where each storage content of the AM4 is automatically recorded in the hard disk device 10 has been shown, but when the system error occurs, the program RAM 3 and the data RAM 4 are immediately output.
The stored contents may be automatically recorded in the hard disk device 10.

Further, the recording destination of the storage contents of the program RAM 3 and the data RAM 4 when the system error occurs is not limited to the hard disk device 10 and may be the floppy disk device 12.

Further, when the program RAM 3 and the data RAM 4 are backed up by the power source, it is possible to restart the system after the system is down by turning on the power switch again. Of course, various modifications can be made without departing from the scope of the present invention.

[0027]

As described above in detail, according to the present invention, even if the system is restarted without performing a special operation after the system error occurs, the program position and the data in the memory at the time of the system error are recorded. Thus, it is possible to provide an electronic device that can easily analyze the cause of a system error without lowering the operating rate.

[Brief description of drawings]

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

FIG. 2 is a flowchart showing the main processing of the CPU in the embodiment.

[Explanation of Codes] 1 ... CPU (Central Processing Unit), 3 ... Program RAM (Random Access Memory), 4 ... Data RAM, 10 ... Hard Disk Device, 12 ... Floppy Disk Device, 15 ... Reset Switch.

Claims (1)

[Claims] 1. A program memory for storing program data, a central processing unit for controlling each part based on the program data stored in the program memory, and data for storing various data processed by the central processing unit. In an electronic device comprising an external memory for writing data under the control of an internal memory and the central processing unit, an error determining means for determining whether or not a system error has occurred, and whether or not a system error has occurred by this determining means An electronic device comprising: error information recording means for recording the stored contents of the program memory and the data memory in the external storage means when determined.