JPS62120538A - System with resetting function - Google Patents

Abstract

PURPOSE:To avoid the breakage of a file, etc., due to a misoperation and to improve the operability with a system containing a resetting function, by holding the information obtained before the execution of a command in a memory area for reset information and resetting said information after the command is executed. CONSTITUTION:A CPU 1, a program area 2, a working area 3 and a reset information memory area 4 are connected to the internal bus 9 of a system. While a keyboard 5 connected to the bus 9 contains the general input keys 5-2-5-n, an information reset designation key 5-1, and an encoder 5-0 which outputs each key input to the bus 9 after coding it. Then the information needed for resetting is stored in the area 4 when the command information is inputted via the area 2. The information stored in the area 4 is reset to a floppy disk 8, etc., after the execution of a command with the operation of the key 5-1 of the keyboard 5. Thus the operability is improved with the system containing the resetting function.

Description

[Detailed Description of the Invention] [Summary] A system for preventing file destruction caused by incorrect input of commands during computer operation, when the command/parameters are unknown or there is concern about the execution results. In such a case, the system can be restored to the state before execution using information saved before execution.

[Industrial application field]

The present invention relates to a system for improving the operability of a computer system, and more specifically, to a system that can return to the state before execution by specifying return after executing a command.

As personal systems such as personal computers become more widespread, opportunities for people other than computer experts to operate computer systems are increasing. In general, those who are not proficient in operations often make mistakes in the method of inputting commands or specifying command parameters, and often do not understand the execution results of various commands. If a command is executed in such a state that the execution result is unknown, a situation may occur that is difficult for beginners to recover from, such as when a file is accidentally deleted. Also, if the file is destroyed,
Repair may be difficult not only for beginners but also for experts. In addition, in today's world where various operating systems run on personal computers, and where different companies offer languages with different specifications, it is often necessary to operate unfamiliar systems.

For this reason, there is a demand for a system that can return to the state before execution if necessary after execution by specifying return before executing the command if there is any concern about the command input method or the execution result. .

[Conventional technology]

In systems such as personal computers that are connected to input devices such as keyboards, output devices such as printers and displays, and input/output devices such as floppy disks, commands entered from the keyboard are analyzed by the CPU and various processing is performed. It is done.

If this command is for something like displaying a directory or driving a printer, even if it is entered incorrectly, an error message will be output and there will be no damage to the system. However, when entering commands such as copying or deleting files using wildcards,
Incorrect input of commands or parameters may cause unexpected and severe damage. In addition, the operation of the system is often not guaranteed by manual commands that are not specified in the manual, and it is impossible or extremely difficult to repair files that are destroyed. In such a case, there is a possibility of recovery for those who are familiar with the system, but there is nothing that beginners can do.

[Problem that the invention seeks to solve]

This conventional system only interprets and executes input commands and does not have a function to return to the state before input. Therefore, there were problems in operability and safety against erroneous operations.

The present invention was created in view of the above points, and an object of the present invention is to provide a system with a return function that can return to the state before command execution even after execution by specifying return. .

[Means for solving problems]

FIG. 1 shows an explanatory diagram of the principle of the system with a return function of the present invention.

In the figure, 1 is the CPU, 2 is the program area of the memory connected to the same bus 9 as the CPUI, 3 is the work area, and 4
indicates the recovery information storage area. Further, a keyboard 5, a display device 6 such as a CRT, a printer 7, and a floppy disk 8 are connected to the bus 9. Keyboard 5 also has
It includes keys indicated by 5-1 to 5-n and an encoder 5-0 for encoding key data and sending it to the bus 9. Note that these are generally configured as stand-alone devices.

[Effect]

When inputting a command by key operation from the keyboard 5 or via a program, the information necessary for return is stored in the return information storage area 4, and by specifying return after executing the command, the information before inputting the command can be stored. to return to the state of Storing the information necessary for restoration in the restoration information storage area 4 requires a storage area and processing time, so it is possible to save information for restoration only when a command that may cause restoration is input. Inputting a subcommand when inputting a command or specifying whether recovery is possible by operating a specific key 5-1,
Configure to save information.

Also, when returning after inputting a command, press a specific key 5.
-2 may be assigned to the return designation key, and by operating this key 5-2, the return information may be read out to return to the state before the command was input, or a command for return may be input. Furthermore, when executing a command that is difficult to recover, such as a direct write command to the disk, or when there is insufficient area to write recovery information, a message to that effect is displayed on the display 6 or a beep is emitted. This alerts the operator by causing the alarm to occur.

〔Example〕

FIG. 2 is a flowchart of an embodiment of the present invention. When a general command or a returnable command is input in step 5100, a process corresponding to the input command is executed in step 5102. Subsequently, when the next normal command is input in step 5106, execution step 3 is executed via return possible determination step 5IOI.
The process returns to 102 and this loop is repeated. When a command for specifying return is input, step 5IO
From I, the process moves to step 5103, and preparations for return are made. Preparations include securing a memory area, checking free disk space, and the like. Subsequently, when a command is input in step 5104, information necessary for restoration is saved in step 5105 depending on the type of input command. Thereafter, after the command is executed in step 3102, a command is waited for in step 8106, and if a general command or a return specification command is input here, step 31
The process moves directly to step 09 (without step 8108), and the system returns to the state before execution in step 5102 based on the saved information. If return is specified in advance, steps 3108 to 510
Processing moves to step 9, and step 5 is performed based on the saved information.
The system returns to its pre-execution state at 102.

FIG. 3 is a flow diagram of another embodiment of the present invention;
Compared to what is shown in the figure, a step 5110 is provided to check whether or not return is possible in response to the command input in step 3104, and if return is possible, necessary information is saved in step 5105. If it is not possible to return, that fact is displayed on the display device in step 5ill, and the state waits for a command in step 5IOQ. In the example shown in FIG. 3, a display is displayed on the CRT to alert the operator, but a display using a light emitting diode or the like or an acoustic warning may be generated.

〔Effect of the invention〕

As described above, according to the present invention, by specifying a return, it is possible to return to the state before execution even after the command has been executed, improving operability and preventing file destruction due to erroneous operation. A system is obtained that is free from the risk of causing this, and is extremely useful in practice.

[Brief explanation of drawings]

FIG. 1 is a diagram explaining the principle of the system with a return function of the present invention, FIG. 2 is a flow diagram of an embodiment of the present invention; FIG. 3 is a flow diagram of another embodiment of the invention. In Figure 1, 1 is the CPU. 2 is the program area, 3 is the work area, 4 is a return information storage area; 5 is the keyboard, 5-1 to 5-n are keys, 5-0 is an encoder, 6 is a display device such as a CRT; 7 is a printer, 8 is a floppy disk, 9 is a bus. Representative patent attorney Sadametsu Igeta, 71. j゛. O (≠ Uchizuki's original IL theory 8 bar diagram Figure 1 Flowchart of Honen Nizuki no Shuto 4g+1 Figure 2

Claims (3)

[Claims] (1) A system for returning to the previous processing state of a command input to a computer and executed, which saves information before command execution (4) and specifies return after execution of the command (5-2) ) A system with a return function capable of returning to a state before the command was executed using information saved by the above command. (2) Specification to enable return before command execution (
5-1) The system with a return function according to claim 1, wherein the system is capable of returning to the state before executing the command by specifying return after executing the command. (3) When inputting a command that is difficult to restore or restore,
Claim 1 or 2, characterized in that a display or an alarm is issued to alert the operator.
System with return function described in section.