JPS6186831A - Data processor - Google Patents

Abstract

PURPOSE:To prevent the disappearance of data due to a misoperation by comparing automatically the final correction time points in a copy mode and then displaying a warning message when a copying action is carried out to a new file from an old file. CONSTITUTION:When only one file of a floppy disk is copied, the new source data disappears if the time of a destination file directory DFD is more recent than the time point of a source file directory read through a clock device 10 and displayed in a binary coded decimal number are compared in the order of dates. Then a copy protection is turned on to display a warning message when the time point of the DFD is equal to or more recent than the time point of the SFD. Then the input is urged for a key to confirm whether a copying action is carried out or not.

Description

[Detailed Description of the Invention] This invention provides a data processing device that uses a word processor, office computer, or other external storage device such as a floppy disk, and has a function of recording the time when a file is updated. In particular, when copying files, the time of each file is compared, and when copying from an old file to a new file, warning information is generated to prompt the operator to confirm the operation. The present invention relates to a data processing device that prevents data loss due to mistakes and improves system reliability.

BACKGROUND ART Conventionally, external storage devices such as floppy disks have often been used in data processing devices such as word processors.

FIG. 10 is a structural diagram showing an example of a floppy disk and a floppy disk drive device. In the drawing, 12 is a floppy disk, 12A is a source floppy disk, 12B is a destination floppy disk, and 13 is a floppy disk. Indicates a disk drive device.

As shown in FIG. 1O, in many data processing devices such as word processors, an external storage device, that is, a floppy disk 12, and a floppy disk drive device 13 that reads/writes data from the floppy disk 12 are connected. has been done.

The floppy disk drive device 13 is provided with two decks A and B, and generally, the position where each floppy disk 12 is set is determined, such that the deck is the source and the deck B is the destination. ing.

The following Figure 11 is a conceptual block diagram showing the structure of the main parts of the floppy disk 12 in a hierarchically enlarged manner. Shows two directories.

As shown in FIG. 11, the floppy disk 12 is represented as a physical area called a volume 12Y. A logical area called a file is allocated to this volume 12Y.

The various files allocated in this way are managed in a section called a directory 12z in which information about each file, such as file name and file size, is recorded.

This directory 12z is divided into primary items ① to ②.

■File name A name for logically accessing a file; a different name is given to each file.

■The time of last modification or the time of last modification/update is January 2, 2017.
It is expressed as a binary coded decimal number in the order of 9 hours, 9 minutes, and 2 seconds of the day.

■Current allocated size This is the size actually allocated on the disk or floppy disk, and the unit is KB (kilobytes).

■Maximum allocation size The maximum allocated size on disks and floppies, in KB (kilobytes) 6
Note that it is never smaller than the current allocation size.

■Allocated positions Tracks (cylinders), head numbers, sectors, and number of sectors are currently recorded at physical positions that are actually allocated on disks and floppies.

■Record length The length of the record code for the file, the unit is B (bytes).
It is.

■Data capacity The current file size is expressed in bytes.

As described above, data processing apparatuses having the function of recording the time when a file is updated or created are conventionally known.

The first is simply when the file was created.
It only has the function of recording.

This first method is simple in processing because it only records the time, but it does not take any measures to prevent operational errors that may occur during copying.

For example, when copying a file from the source floppy disk 12A to the destination floppy disk 12B using the floppy disk drive 13 shown in FIG. If you execute this by mistake, the source floppy disk 12A will be transferred from the destination floppy disk 12B.
The source floppy disk 1
Important source data recorded in 2A will be lost.

Secondly, in order to solve this problem, there is a method of applying write protection on a file-by-file basis.

This second method is more secure than the first method, but it requires operator judgment when setting protection, so if you forget to set protection in advance, the copy operation will still Data will be lost.

Thirdly, there is a method of applying write protection to the floppy disk itself.

Figures 2 (1) and (2) are diagrams for explaining an example of a method of applying write protection to a conventional floppy disk. Figure (1) shows the write-protected state, and Figure (2) ) indicates a writable state. 12C of drawing
is a notch, and 12D is a tape.

In this method of write-protecting the floppy disk itself, as shown in FIG. 12(1), the floppy disk 12 is write-protected while it has a notch 12C.

Then, as shown in FIG. 12(2), this notch 12C
When it is covered with tape 12D or the like, it becomes writable.

Figures 13 (1) to (3) are diagrams for explaining another example of the same conventional method of applying write protection to the floppy disk itself; Figure (1) is a top view of the floppy disk 12; (2) is an enlarged view of the end of the floppy disk 1.2, showing a write-protected state, and FIG. (3) is an enlarged view of the end, showing a writable state. 12E in the drawing is an end portion of the floppy disk 12, and 12F is a protection member.

In the method of applying write protection to the floppy disk itself shown in FIG. Write protection is applied by sliding the member 12F back and forth.

That is, as shown in FIG. 13 (2) showing an enlarged view of a portion 12E of the floppy disk 12, the protection member 1
When 2F is at the end position, it is in a write protect state.

This protection member 12F is shown in FIG. 13 (3).
), it becomes ready for writing.

However, in Figure 12 (1) and (2), which apply write protection to the conventional floppy disk itself, and in Figure 13 (1),
In the methods of ) to (3), write protection is performed based on the operator's judgment, so a process for applying protection in advance is required.

In the first to third conventional methods, it is not always possible to sufficiently protect the source data at the time of copying.

That is, in the first conventional method, there is no means to set write protection at the time of copying, and in the second and third methods, there is a method to set write protection at the time of copying, but the operator is required to make the decision. Therefore, if a setting operation is forgotten, important data may be destroyed due to a mistaken operation, which is an inconvenience.

Purpose Therefore, the data processing device of the present invention uses a conventional external storage device and solves such inconveniences in a data processing device equipped with a function of recording the time when a file is updated. .

Automatically compares the last modification time, and when an old file is copied to a new file, a warning message is displayed to prompt the operator to confirm, thereby preventing data loss due to operational errors. , the purpose is to improve the reliability of the system.

Structure To achieve this, the data processing device of the present invention is provided with time comparison means for extracting and comparing file times, and warning information generation means for generating warning information such as a warning message. When copying from an old file to a new file is performed by using the warning information generating means, a warning is generated.

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

FIG. 1 is a functional block diagram showing an embodiment of a data processing device of the present invention. In the drawings, 1 is an input device;
2 is an input control section, 3 is a CPU, 4 is a display control section, 5 is an output device, 6 is an external storage control device, 7 is a memory, 8 is a time extraction section, 9 is a time comparison section, 10 is a clock device, 11 indicates an external storage device.

FIG. 2 is a flowchart for explaining file creation and update processing operations in the circuit of FIG. 1.

In order of explanation, first, file creation and update operations will be described.

FIG. 2 is a flowchart for explaining the file creation and updating operations in the circuit of FIG. 1.

When creating or updating a file, the last modification time item in the directory 12z of the floppy disk 12 shown in FIG. 11 is processed according to the flow shown in FIG. 2.

First, to create a file, it is checked whether the same file name exists in the directory 12z.

Displays a duplicate file creation error, if any.

Furthermore, if it is a new creation, items other than the last modification time are set in the directory 122.

Then, the current time is read from the clock device [10] and set in the last modified time area of the directory 12Z in binary coded decimal notation.

On the other hand, when updating, the directory 12z of the file is read from an external storage device such as a floppy disk.

Then, the file is updated, that is, data is added and changed.

Finally, in the same way as when creating the file, the current time number is read from the clock device IO and set in the last modified time area of the directory 122 in binary coded decimal notation.

Next, a first embodiment of the floppy copy operation in the data processing apparatus of the present invention will be described.

In this first embodiment, only one file on a floppy disk is to be copied. New source data is lost when the time of the destination file directory is newer than the time of the source file directory at the time of copying. When an old file is copied to a new file by comparison, a warning message is displayed to prompt the operator to confirm.

FIG. 3 shows an example of a flowchart for explaining the temporary copying operation of a floppy disk in the data processing apparatus of the present invention, and FIG. 4 is a flowchart showing details of the time comparison process in the flowchart of FIG. It is. In FIG. 4, SFD indicates a source file directory, and DFD indicates a destination file directory.

FIG. 5 is an example of a warning screen according to the first embodiment. In the drawings, Y indicates a copy execution instruction, and N indicates copy execution cancellation.

FIG. 6 shows an example of the configuration of the last modification time stored in the directory 12Z.

Figures 7 (1) to (3) are examples of comparing the times of the source directory and destination directory.
If the destination file is newer,
Figure (3) shows the source file and destination file.
Indicates when the files have the same time.

By the process explained earlier in relation to the flow in FIG. 2,
Only the last modification times set in the source file directory SFD and destination file directory DFD are extracted by the flow shown in FIG. 3, and the times are compared.

If copy protection is required from an old file to a new file, a warning message will be displayed and the operator will be asked to confirm.

Then, with this warning displayed, the key is waiting for human power.
When the copy execution key is input, the source file is copied to the destination file.

Next, we will discuss the time comparison process, especially in Figures 4 and 6.
This will be explained with reference to FIG. 7 and FIGS. 7(1) to (3).

As shown in the configuration example of the last modified time in FIG. 6, the last modified time in the directory 12Z is stored as a value read from the clock device 10 and displayed in binary coded decimal notation.

As shown in FIG. 7 (1), for example, the SFD time is “
Assume that it is July 24, 1984, 18:04:20 J, and the time on the DFD is "July 23, 1984, 19:12:47."

First, take the values for each year and compare them.

In this case, since the two are equal, next, take out the month value and compare the magnitude.

In this example, since these are also equal, we also extract the day value and compare its magnitude.

In this case, the source file directory SFD
is larger than the destination file directory DFD.

That is, the SFD is greater than the DFD without comparing subsequent hour, minute, and second values; in other words, the source file directory SFD is greater than the destination file directory DFD. It is clear that this is also new.

Therefore, in this case, even if the copy is executed, the new file will not be copied to the old file.

On the other hand, in the example shown in FIG. 7 (2), the SFD time is "July 24, 1984, 9:18:47."

DFD time is "July 24, 1984 12:08:47"
Therefore, as in the previous case, if we compare the values of January and day in sequence, they will all be equal.

However, if we then compare the magnitude of the 1 o'clock value, it is "9".
and "12", it can be seen that the DFD is larger than the SFD.

Therefore, in the case of FIG. 7 (2), the DFD is larger than the SFD, that is, the destination file directory DFD is larger than the source file directory.
It is clear that the file/directory is newer than the SFD.

Furthermore, in the example of FIG. 7(3), both the SFD and DFD times are "July 24, 1984, 19:37:08".

In this case, by sequentially comparing all the values of year, month, day, hour, minute, and second, the SFD and DFD are created and updated at the same time, that is, the source file directory SFD It can be seen that the time is the same as that of the destination file directory DFD.

In this way, comparing the SFD time and DFD time,
Depending on the comparison result, if the time of the source file/directory SFD is newer than the time of the destination file/directory DFD, as shown in Figure 7 (1), copy protection is applied. Turn it off and run the copy.

On the other hand, as shown in Figure 7 (2) and (3), when the time on the DFD is the same as or newer than the time on the SFD, copy protection is turned on, a warning message is displayed, and the copy is executed. Encouraging human power is the key to confirmation.

Then, when a copy execution instruction (Y) is input,
Execute the copy. Furthermore, if copy execution stop (N) is input, the process is ended without executing the copy.

Next, as a second embodiment of the data processing apparatus of the present invention, a case will be described in which a volume unit copy of a floppy disk is performed.

In this second embodiment, it is assumed that a source volume A is copied to a destination volume B.

First, as in the first embodiment, the process according to the flow shown in FIG. 2 is performed to create and update directories for files in each volume A and B.

FIG. 8 is a diagram illustrating the state of comparison between the directories of the source volume A and the destination volume B when copying by volume of a floppy disk.

As shown in Figure 8, source volume A contains
Assume that there are n files A-1 to An, and that destination volume B has m files B-1 to B-m.

According to this second embodiment, even when executing a volume copy, the last modification times of the directories of each file are compared before execution.

The time comparison process is the same as in the first embodiment,
Compare the magnitude of each value in the order of year, month 1st, hour, minute, and second.

In this case, the files to be compared are not compared one-to-one, but n-to-m.

First, file A-1 on source volume A and file B-1 on destination volume B are compared. Next, file A-1 and file B-2
Compare with. Comparison with such file A-1,
Perform files B-3 to B-m.

In this way, file A-1 and file B-1=
A comparison is made with m files of B-m.

Next, regarding file A-2, file B
Compare with m files from −1 to Bm.

Similarly, files A-3 to An are compared with files B-1 to B-m.

FIG. 9 shows an example of a warning screen when copying a floppy disk by volume.

When comparing volumes A and B as shown in FIG. 8, file B-j of destination volume B,
If the last modification time of file A-i in source volume A is the same or if file B-j is newer, the file names of files A-4 and B-j are displayed as shown in Figure 9. At the same time, a warning message is displayed to prompt you to confirm whether you want to perform the copy.

Then, if copy execution stop (N) is input,
At this point, the comparison is stopped and the process ends without executing the volume copy.

Further, when a copy execution instruction (Y) is input, file A-i is compared with the next file B-(j+1).

In this way, when all nXm comparisons are completed, volume copying is performed.

By performing such a comparison process, it is possible to prevent operational errors in copying in units of volumes.

For example, during a volume copy from source volume A to destination volume B, if only file Ai is newer than all other files,
Due to an operational error, even if you try to copy from volume B to volume A, file B-1 and file A-i will be deleted.
Since a warning message is displayed and a confirmation key is prompted when the data is compared with the file A-i, data loss in the file A-i can be prevented.

Therefore, according to the data processing device of the present invention, even when copying a floppy disk by volume, the operator is prompted to confirm when copying from an old file to a new file, and mistakes can be made. Loss of data due to operations is prevented.

As described in detail above, in the data processing device of the present invention, the data processing device has a function of also recording the time when updating a file, and includes a time comparing means for extracting and comparing file times; A warning information generation means for generating warning information such as a warning message is provided, and when copying is performed from an old file to a new file based on the comparison result of the time comparison means, the warning information generation means generates a warning. There is.

Effects Therefore, according to the data processing device of the present invention, when copying from an old file to a new file during temporary copying of files and volumes, a warning message prompting the operator to confirm is displayed. Loss of source data due to operational errors is reliably prevented and system reliability is improved.

Furthermore, since the system automatically sets and compares the time without the operator having to perform any operations, excellent effects such as improved operability of the data processing device can be obtained.

[Brief explanation of drawings]

FIG. 1 is a functional block diagram showing one embodiment of the data processing device of the present invention. An example of a flowchart for explaining the temporary copying operation of a floppy disk in the data processing apparatus of the present invention, FIG. 4 is a flowchart showing details of the time comparison process in the flowchart of FIG. 3, and FIG. An example of a warning screen according to the embodiment, FIG. 1) if the source file is newer, then Figure (2)
If the destination file is newer,
Figure (3) shows the source file and destination file.
If the files have the same time, tW is the source file when copying a floppy disk volume.
A diagram explaining the comparison status of each directory between volume A and destination volume B, m- is an example of a warning screen when copying by volume of a floppy disk, and hairffl is a diagram of a floppy disk and a floppy disk drive device. Structural diagram showing an example, LL
ifi is a conceptual diagram showing the structure of the main parts of the floppy disk 12 in a hierarchically enlarged manner.
⇓ The same figure is used to explain another example of a conventional method of applying write protection to the floppy disk itself.Figure (1) is a top view of the floppy disk 12, and figure (2) is a top view of the floppy disk 12. An enlarged view of the end shows a write-protected state, and Figure (3) shows an enlarged view of the end, showing a write-enabled state. In the drawings, 1 is an input device, 2 is an input control unit, and 3 is C
PU, 4 is a display control unit, 5 is an output device, 6 is an external storage control device, 7 is a memory, 8 is a time extraction unit, 9 is a time comparison unit, 10 is a clock device, and 11 is an external storage device. Patent applicant Rico Co., Ltd. - Ao 7 Figure

Claims (1)

[Claims] A data processing device that has a function of recording the time when a file is updated is provided with time comparison means for extracting and comparing file times and warning information generation means for generating warning information such as a warning message. . A data processing device, wherein the warning information generating means generates a warning when copying from an old file to a new file is performed based on the comparison result of the time comparing means.