JPH04246711A - Fault restoration system for personal computer - Google Patents

Abstract

PURPOSE:To constitute the system so that a system state to the time of suspension can be restored automatically or semiautomatically at the time of restart, even in the case an operation of a personal computer is suspended due to a fault such as power source disconnection and runaway, etc. CONSTITUTION:Keyboard input data stored as a time series in a key code history table 2-1 of a nonvolatile memory for storing the keyboard input data inputted from a keyboard 1 of a personal computer in order of its input is initialized at the time when the operation of an application program is finished normally. Subsequently, when execution of the application program is started, whether the storage contents of the key code history table 2-1 exist or not is checked, and when the storage contents do not exist, the regular actuation is executed, and when the storage contents exist, it is decided that a faul is generated and a store command of the key code history table 2-1 is executed, and thereafter, a restoration processing actuation for executing the next command of a keyboard input is executed.

Description

[Detailed description of the invention]

0001

[Field of Industrial Application] The present invention relates to a fault recovery system for personal computers, and in particular, the present invention relates to a fault recovery method for personal computers, and in particular, automatic or This invention relates to a fault recovery method for personal computers that enables semi-automatic recovery.

0002

2. Description of the Related Art Conventionally, personal computers have not been configured to directly utilize key input data and to store it in a non-volatile format in chronological order.

0003

[Problem to be Solved by the Invention] In conventional personal computers, input data from keyboard operations is used directly to control program operations.
After interrupting program operation, there is no remaining data necessary to restore the state before the interrupt when restarting. Therefore, in the event of a failure, a human must perform the same operation from the beginning again using the keyboard to restore the system.

0004

[Means for Solving the Problems] A failure recovery method for a personal computer according to the present invention includes a non-volatile memory that stores keyboard input data of the personal computer in the order of input. The data is initialized when the application program finishes operating normally, and when the application program starts running, it is checked to see if there is any memory content in the non-volatile memory, and if there is no memory content, it is started normally, and if there is memory content, it is checked. The system is configured to execute a storage command in the nonvolatile memory upon determining that a failure has occurred, and then start a recovery process to execute the next command input from the keyboard.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram of one embodiment of the present invention. In FIG. 1, 1 is a keyboard, 2 is a keyboard device driver, 2-1 of the keyboard device driver 2 is a key code history table located on nonvolatile memory, 2-2 is a key data queue, and 3 is a keyboard device driver. Monitor dispatcher 4 is an application program. In addition, a-1 is an input key code passed to the keyboard device driver 2 through an external interrupt of a key pressed on the keyboard 1, and is stored in the key code history table 2-1 in the order of input, except during recovery work processing. Along with
The data is buffered in the key data queue 2-2 in order to be passed to the monitor dispatcher 3. During the recovery process, the keyboard device driver 2 only buffers the key data queue 2-2 without storing the input key code a-1 in the key code history table 2-1. a-3 is an output key code that the keyboard device driver 2 passes the data buffered in the key data queue 2-2 to the monitor dispatcher 3, and a-4 is the output key code that the monitor dispatcher 3 passes to the application program 4. Power output key code a-3
This is the application-passed key code that was relayed. Also, a-2 is the key code history table 2-1 during the recovery process.
This is key code history data read from.

Next, the operation of the embodiment shown in FIG. 1 will be explained.

First, the method of using the key code history table 2-1 will be explained. This key code history table 2-
1 is initialized when the operation of the application program 4 normally ends and the monitor dispatcher 3 returns to the idle status of waiting for the next command. Therefore, if there is no failure such as power outage or runaway immediately before system startup, the key code history table 2-1 will be in a state with no stored data, but if there is any other failure, some key code is stored, which makes it possible to judge whether or not recovery processing is necessary.

In the case of normal startup, the keycode history table 2-1 is in a state where there is no data, and the keyboard device driver 2 sequentially inputs the input commands from the keyboard 1 to the keycode history table as history starting from the first keycode. Stores the key code until the command ends.

Next, the overall operation of this embodiment will be explained.

[0011] When the system starts up, the keyboard, device,
During the initialization operation, the driver 2 checks the contents of the key code history table 2-1, and if it is empty, sets the mode to store the key codes in order from the beginning, and sends a normal startup notification to the monitor/dispatcher 3. do. The monitor dispatcher 3 enters a normal command waiting state in response to the provided normal startup notification. If the keycode history table 2-1 is not empty, the keyboard device driver 2
A mode is set in which key code storage for -1 is not performed, and the monitor/dispatcher 3 is notified of the start of recovery processing. This recovery processing operation is performed in the key code history table 2-
This is done by sequentially reading out and executing the key code history data a-2 stored in the key data queue 2-2 stored in the key data queue 2-2. The exact process is reproduced. At the end of the recovery process, the application program 4 is necessarily in an operating state, so the memory pointer for restarting keycode history recording for the keycode history table 2-1 is the keycode storage location read out during the recovery process. is set to the next address. After the above operations, the keyboard device driver 2 sets the keycode history storage mode in the keycode history table 2-1, and the system is restored to the state before interruption and continues operation.

0012

Effects of the Invention As explained above, the present invention records the keyboard input data of a personal computer as a history on a non-volatile memory, checks the presence or absence of this data at startup, and depending on the presence or absence of data, normal startup and recovery processing start. By determining this, if the operation is interrupted due to power outage or runaway, the system state can be automatically or semi-automatically restored to the state at the time of interruption upon restart.

[Brief explanation of the drawing]

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

[Explanation of symbols]

1 Keyboard 2 Keyboard device driver 2-1
Key code history table 2-2 Key data queue 3 Monitor dispatcher 4 Application program a-1
Input key code a-2 Key code history data a-3 Output key code

Claims (1)

[Claims] Claim 1: A non-volatile memory for storing keyboard input data of a personal computer in the order of input,
The keyboard input data stored in this non-volatile memory in chronological order is initialized when the application program normally completes its operation, and when the application program starts running, it is checked whether or not there is any content stored in the non-volatile memory. If there is no stored content, the personal computer starts up normally, and if there is memory content, it determines that a failure has occurred, executes the storage command in the nonvolatile memory, and then starts a recovery process that executes the next command input from the keyboard. Computer disaster recovery method.