JPS61168060A - Data processor - Google Patents

Abstract

PURPOSE:To prevent the change and vanishment of data caused by misoperation certainly to protect important data perfectly and easily, by making setting of protect to an external storage device possible for an optional period at an optional moment. CONSTITUTION:Special keys for setting and releasing a write protect controlling mode are provided to an input device 1. When the write protect controlling mode is set, inputted write protecting conditions are stored in a protecting conditions storing means 5 and, when data is written on an external storage device 6 through ordinary key operations, the write protecting conditions stored in the protecting conditions storing means 5 are retrieved by means of a protecting conditions detecting means. When it is detected that the protecting conditions are set, the data writing on the external storage device 6 is controlled so that the data writing cannot be executed.

Description

[Detailed Description of the Invention] The present invention relates to office computers, word processors in Romanian and Japanese languages, and data processing devices that use various external storage devices, and particularly to data processing devices that use external storage devices. By making it possible to change the protection settings and specify the effective period of the protection settings, it is possible to prevent data loss due to operational errors when writing data to an external storage device. The present invention relates to a data processing device that can reliably protect data.

BACKGROUND OF THE INVENTION In various data processing devices that use external storage devices, such as office computers, word processors, and data processing systems (DPS).

Cases often occur in which important data is lost due to an operational error when writing data to an external storage device.

Therefore, in order to prevent data loss due to such operational errors, a method of setting write protection on the storage medium (floppy) itself of an external storage device has been adopted.

However, with this traditional write protect setting method,
It is necessary to set write protection on the storage medium itself, so if you forget to protect it, data may be lost due to an operational error.

Other conventional methods to resolve these inconveniences include:
It is also known to protect data by allowing volume protection to be set.

In this volume protection setting method, when initializing a floppy disk, the conditions for whether or not protection is to be performed are set, and protection can be set as necessary.

FIG. 8 shows an example of a display screen when setting conventional volume protection. In the drawing, the IDE specifies the deck where the initial volume is set, and the MOD
is the volume use mode, and CPP is the protection specification.

For example, a designation such as R: Ricoh mode, I: IBM mode is input to the volume usage mode MOD.

Further, in the protection designation CPP, inputs such as Y: protect, N: do not protect, etc. are performed.

Figures 9 (1) to (3) are conceptual configuration diagrams of a floppy to explain how to set volume protection. Figure 1 (1) is a floppy, and Figure (2) is an enlarged view of the same floppy. Figure (3) is the o track of Figure (2).

It is an enlarged view of 7 sectors.

During initial setup of the floppy, the operator sets the volume
When protection is specified, a screen like the one shown in FIG. 8 is displayed. In this display state, specify protection settings.

In this case, on the floppy, as shown in enlarged views in Figure 9 (2) and (3), the physical address of the floppy, that is, the 35th byte area of the 7th sector on the 0 track, is
This area is used to set volume protection.

When the operator sets volume protection in the display state shown in Fig. 8, for example, [P] is displayed in this setting area.
The code is stored. Note that "0" and other predetermined codes are input in the setting area when not set.

Through such operations, volume protection is set.

However, with this conventional volume protection setting method, it is not possible to set protection conditions at the time of initializing the floppy disk.

Moreover, it is necessary to set volume protection for each floppy.

Therefore, if there are a large number of floppies that require protection, protection must be set at the time of initial setting for all floppies, which is inconvenient and requires a great deal of effort.

Furthermore, with these conventional write protect and volume protect setting methods, it is impossible to specify the protection setting period, that is, the protection validity period.

Therefore, for example, if sales data is created before the deadline and there are some days left until the invoice is issued, it is necessary to protect the data for a certain period of time, but it is important to set protection only during that period. I can't.

In short, from the time the data is created to the time it is published, if you need to refer to the data, there is no problem in referencing it, but if you do not want the data to be changed, protect it for only that period. There was no way to set it up.

Therefore, when data is referenced during that time, a situation often occurs in which data is changed or lost due to an operational error.

In this way, conventional write protection and volume
All of the protection setting methods have the disadvantage that they cannot completely prevent data from being changed or lost due to operational errors.

1-1 Therefore, in the data processing device of the present invention, such inconveniences in the conventional protection setting method are solved, and when it becomes necessary to protect data stored in an external storage device, it is possible to protect data stored in an external storage device at any time. By making it possible to set protection for the external storage device for any period of time, it is possible to reliably prevent data from being changed or lost due to operational errors during any period when data needs to be protected. 1 The purpose is to completely and easily protect important data.

1-One litter For this purpose, the data processing device of the present invention.

The input device is equipped with a special key for setting and canceling the write protect control mode.

A protect condition storage means for storing information regarding the write protect condition and a protect condition detecting means for detecting the set write protect condition are provided, and when the write protect control mode is set, the input write protect condition is The protect condition is stored in the protect condition storage means, and when data is written to the external storage device by normal key processing, the write protect condition stored in the protect condition storage means is searched by the protect condition detection means, When it is detected that a protect condition has been set for the external storage device, it is controlled to prevent data from being written to the external storage device, thereby preventing important data from being lost due to an operational error during writing. to prevent alteration or loss;
We ensure that your data is fully protected.

Next, embodiments of the data processing apparatus of the present invention will be described in detail with reference to the five drawings.

FIG. 1 is a functional block diagram showing the configuration of essential parts of an embodiment of a data processing device of the present invention. In the drawings, 1 is an input device, 2 is a display device, 3 is a control unit, and 4 is a display device.
5 is a processing unit, 5 is a write protection control data storage area, 6 is an external storage device control unit, 7 is a write data storage area, and 8 is an external storage device.

In the circuit shown in FIG. 1, a write protect control data storage area 5 and a processing section 4 for write protect control are added.

In addition, one of the keys on the input device 1 is assigned as a special key for write protection control.This special key sets write protection when pressed for the first time.
It functions to cancel the protection setting by pressing it again.

In the data processing device of the present invention, the created data is temporarily stored in the write data storage area 7.

When writing the write data in the storage area 7 to the external storage device 8, if it is desired to protect the data for a certain period of time, a write protect control input mode is set using a special key for write protect control.

Then, write the setting device name, setting period, etc.
Input information regarding protection, and through the processing unit 4,
The write protect control data is stored in the write protect control data storage area 5.

The write protect control data stored in this write protect control data storage area 5 is as follows.

It is read when data is written to the external storage device 8, and it is determined whether or not a write protect condition is set. If the write protect condition is set, the data is controlled not to be written.

The other configuration is basically the same as that of the conventional data processing device6. That is, in normal key processing, each data such as characters, symbols, control signals, etc. is input from the input device , displayed on the display device 12, and also.

The created data is stored in the write data storage area 7.

The data stored in the write data storage area 7 is written and stored in the external storage device 8 by giving a control signal to the external storage device control section 6 as needed.

FIG. 2 is a functional block diagram showing the configuration of main parts related to write protection control of the data processing device shown in FIG. 1. Reference symbols in the drawing are the same as in FIG. 1, and 11 is an input control section, 12 is a gate circuit, 13 is a normal key processing section, 14 is a special key processing section, 15
21 is a flip-flop circuit, 21 is a cursor control unit, and 22 is a flip-flop circuit.
is a screen save/load control section, 23 is a screen control section, 24
is a screen save area, 31 is a write protect setting key processing section, 32 is a write protect setting condition storage area, 33 is a write protect judgment section, 34 is a warning control section, 35 is a warning screen data storage area, and 36 is a write section.・
A protect setting screen data storage area, 37 indicates a system timer.

First, in normal key processing, key data from the input device i1 is supplied from the input control section 11 to the normal key processing section 13 through the gate circuit 12.

This normal key processing is similar to that of conventional data processing devices. Furthermore, data for cursor display is output to the display device 2 via the cursor control section 21.

When writing data to the external storage device 8 using normal key processing, if you want to set write protect to protect the data, enter the special key to set the write protect control input mode. be done.

FIG. 3 is a flowchart showing the flow of processing when a write protect control key is input during normal key processing in the data processing apparatus of the present invention.

First, we will explain how to set write protection.

As explained above, to set write protection, switch the currently executing normal key processing to write protect control input mode, and enter the name of the device to be protected and the start and end times of protection. .

First, when a special key assigned as a write protect control key is input from the input device 1, the write protect control key is input.
Enters protect control input mode.

In other words, when this special key for write protect control is input during normal key processing, the currently running job is interrupted and the currently displayed screen information is Save to screen save area.

In the circuit shown in FIG. 2, the input of the special key provided in the input bag at is performed by the input control section 11. The special key processing unit 14 passes the flip-flop circuit 15 to the gate circuit 12, and the mode is switched to a mode for setting write protect control.

At the same time, in response to the input of this special key, the special key processing section 14 gives a light protection setting signal to the screen control section 23. In response to this write protect setting signal, a screen save/load signal is output from the screen control section 23 to the screen save/load control section 22.

As a result, the screen information currently displayed on the screen is.

The screen is saved in the screen save area 24.

Then, as shown in the center of FIG. 3, the process moves to a process flow for setting protection conditions.

FIG. 4 is a flowchart showing the detailed process flow when setting write protection in the data processing apparatus of the present invention shown in FIG.

FIG. 5 is an example of a display screen when setting write protect conditions.

When the write protect control input mode is set, the process moves to the flow shown in FIG. 4, and the display screen is switched to the write protect setting screen as shown in FIG. 5.

Therefore, as shown in the flowchart of Fig. 4, first.

Enter the configured device name and check whether the device name exists.

If it does not exist, set the device name.

Next, the write protect start time is input and compared with the current time from the system timer 37. As a result of the comparison, if the input time is in the future, the start time is set.

Next, the end time of write protection is input and compared with the current time. Similarly, if the input time is in the future, the end time is set.

When the setting of write protect conditions is completed by such an operation, the special key is input again.

When the write protect setting mode is canceled by inputting this special key again, the flow returns to the lower part of FIG. 3.

Then, as shown in the flowchart of FIG. 3, the screen information of the interrupted job is loaded from the screen save area 24, and the job is re-executed.

In the circuit shown in FIG. 2, when a special key is input again, it passes from the input control section 11 and the special key processing section 14 to the flip-flop circuit 15, and then switches the gate circuit 12.
Returns to normal key processing.

Next, a description will be given of a process for detecting write protect conditions set in each external storage device in this manner.

FIG. 6 is a flowchart showing the detailed flow of processing when writing to a device in the data processing apparatus of the present invention shown in FIG.

FIG. 7 is an example of a display screen when write protect conditions are set when writing to a device.

In normal key processing, when a write command is given to a device, as shown in the flowchart of FIG. 6, write protection is determined and compared with preset write protection conditions.

First, the device name is compared to determine whether the device is set as a protect condition.

If they do not match, it is determined that the data is not protected, and write permission is issued to the external storage device control unit 6, and the data on the data storage area 7 is directly written using DMA (dynamic memory access). The data is written by transferring the data to the external storage device 8.

On the other hand, if it matches the device name set in the protect condition, then it is compared with the current time read from the system timer 37 and the current time is set in the write protect condition. Check whether it is within the specified period.

In this case, if it is outside the set condition period, it is determined that it is not protected, and write permission is issued, and the DMA
Write by.

If the current time is within the period set in the write protect condition, the warning control unit 34 outputs a warning display signal.

The warning control unit 34 outputs a warning display signal to the screen control unit 23, saves the currently displayed screen information to the screen save area 24, and reads the warning screen data from the warning screen data storage area 35. , output to the display device 2 6 Therefore, a warning screen as shown in FIG. 7 is displayed. Note that a warning sound such as a buzzer may be generated simultaneously with the display of the warning screen.

In this way, a warning screen is displayed by outputting a warning display signal from the warning control unit 34 to the screen control unit 23, and this warning screen is displayed on the primary input device [1 until a special key is input. , its display state is maintained.

Here, when the special key is input, a warning display end signal is output to the screen control unit 23, and the screen data before the warning screen is output, that is, the screen information saved in the screen save area 24, is read out. Output to display device 2.

In this way, when a write protect condition is set, it simply issues a warning and actually protects the external storage device!
8, the process ends without executing the write.

Therefore, data cannot be written to the external storage device E8 for which the protect condition has been set within the set period, and data loss or modification due to operational errors can be reliably prevented.

For example, there was a mistake in the created data.

If you really want to change the contents of the data, you can change the data by setting it once and changing the protection conditions.

Furthermore, if you want to semi-permanently save data to be stored in an external storage device, you can enter a special code indicating that it is semi-permanent when inputting the write protect setting period.

As described in detail above, the data processing device of the present invention includes at least an input device, a display device, and a data storage memory, and each part is controlled by a central control device,
In a data processing device that has the ability to process input characters and data.

The input device is provided with a special key for setting and canceling the write protect control mode, a protect condition storage means for storing information regarding the write protect condition, and a protect condition detecting means for detecting the set write protect condition. and when the write protect control mode is set: The input write protect condition is stored in the protect condition storage means,
When data is written to an external storage device by normal key processing, the protect condition detection means searches for a write protect condition stored in the protect condition storage means, and the protect condition is set for the external storage device. When this is detected, control is performed so that data is not written to the external storage device.

Effects Therefore, according to the data processing device of the present invention, when it becomes necessary to protect data to be stored in an external storage device, it is possible to protect data not only at the time of initial setting as in the conventional case, but also at any time and at any time. It becomes possible to set protection for the external storage device for the period.

Further, once set protection conditions can be easily changed or canceled as necessary.

The write protect conditions set in this way are compared and detected when data is written to the external storage device, and when protection is set, the data is controlled to not be written. .

As a result, an excellent effect can be obtained in that, within any period during which data needs to be protected, changes and loss of data due to operational errors are reliably prevented and one important data is completely and easily protected.

[Brief explanation of the drawing]

FIG. 1 is a functional block diagram showing the configuration of essential parts of an embodiment of the data processing device of the present invention. FIG. 2 shows the data processing device shown in FIG. 1. FIG. 3 is a functional block diagram showing the configuration of the main parts related to the write protect control, and shows the flow of processing when a write protect control key is input during normal key processing in the data processing device of the present invention. 1 is a flowchart showing the detailed flow of processing when setting write protection in the data processing device of the present invention shown in FIG. 3, and FIG. 5 is a display when setting write protect conditions. An example of a screen, m is a flowchart showing a detailed flow of processing when writing to a device in the data processing apparatus of the present invention shown in FIG.
The figure shows an example of a display screen when write protect conditions are set when writing to a device. Figure 8 shows an example of a display screen when conventional volume protect is set. ) is a conceptual configuration diagram of a floppy to explain how to set volume protection. It is an enlarged view of 0 track and 7 sectors. In the drawing, ■ is an input device, 2 is a display device, 3 is a control unit, 4 is a processing unit, 5 is a write protect control data storage area, 6 is an external storage device control unit, 7 is a write data storage area, 8 is an external storage device, 11 is an input control unit,
12 is a gate circuit, 13 is a normal key processing section, 14 is a special key processing section, 15 is a flip-flop circuit, 21 is a cursor control section, 22 is a screen save/load control section, 23 is a screen control section, and 24 is a screen save section. Area, 31 is light
32 is a write protect setting condition storage area; 33 is a write protect judgment unit; 34 is a warning control unit; 35 is a warning screen data storage area; 36 is a write protect setting screen data storage area; 37 indicates the system timer.ぢ 5 illustrious 7 flash

Claims (1)

[Claims] In a data processing device that is equipped with at least an input device, a display device, and a data storage memory, and has a function of controlling each part by a central control device to process input characters and data, A special key for setting and canceling the write protect control mode, a protect condition storage means for storing information regarding write protect conditions, and a protect condition detecting means for detecting the write protect conditions are provided. When the protect control mode is set, the input light
A protect condition is stored in the protect condition storage means, and when data is written to an external storage device by normal key processing, the write protect condition stored in the protect condition storage means is detected by the protect condition detection means. 1. A data processing device that performs control so that data is not written to the external storage device when it is detected that a protect condition is set for the external storage device.