JPH01108634A - System for preventing erroneous usage of external recording medium - Google Patents

Abstract

PURPOSE:To prevent data from being destroyed and a program from being operated abnormally by checking whether or not a medium is an external recording medium on which read or write has been performed previously, and issuing an alarm when a different external recording medium is set. CONSTITUTION:By setting data recording media 7-1-7-n by a user by issuing an instruction to perform the read or the write on the data recording media 7-1-7-n from the program, a program name stored in the medium information 3 of a non-volatile memory 2 in the name of the program stored in the load program 11 of a main storage 10 is retrieved. When it is recognized that the program name which coincides with the program name of the program stored in the load program 11 exists in the medium information 3 by the above retrieval, identifiers 8-1-8-n attached on the data recording media 7-1-7-n set by the user are compared with the identifier corresponding to the program name which coincides stored in the medium information 3. When no coincidence is obtained, a message is displayed. In such a way, erroneous usage can be prevented from being performed.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for preventing misuse of external recording media used in various data processing devices.

(Prior Art) Conventionally, when using an external recording medium, this type of data processing device unconditionally performs read or write operations on the recording medium that the user sets in the data processing device. .

(Problems to be Solved by the Invention) As mentioned above, conventional data processing devices unconditionally perform read or write operations on the external recording medium set by the user. When a recording medium is set, if the incorrectly set recording medium is a data recording medium, data may be destroyed, and if the incorrectly set recording medium is a program recording medium, it may cause abnormal operation. was there.

(Means for Solving the Problems) In order to solve the above-mentioned problems, the method for preventing misuse of external recording media provided by the present invention is to prevent the misuse of external recording media by storing a plurality of program recording media storing various programs and storing these programs. Various tasks can be performed by loading programs and data stored in the program recording medium and data recording medium into the main memory and executing them using a plurality of data recording media storing data used in the program recording medium and the data recording medium. In a data processing apparatus that realizes the above, the data recording medium is provided with an identifier uniquely added to each data recording medium together with the data, and the data recording medium is provided with an identifier uniquely added to each data recording medium, and the data recording medium is The storage includes an area for storing the names of programs currently loaded and being executed, and stores the program names of all programs stored in the program recording medium that were previously operated on the data processing device, and the names of the respective programs. storage means comprising a non-volatile memory for storing the identifier uniquely added to each data recording medium in which used data is stored; means for searching the storage means; and when the search means detects in the storage means a program name that matches a program name stored in the load program name storage area, the storage means corresponds to the program name; means for comparing an identifier stored in the data storage medium with an identifier added to a data storage medium set by a user, and a program name that matches the program name stored in the load program name storage area by the search means. means for storing the program name and an identifier added to a data storage medium set by the user in the storage means when the program name is not detected in the storage means; and a means for executing reading or writing to the data recording medium when both identifiers match by the comparing means. shall be.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing an outline of a system for preventing misuse of an external recording medium according to an embodiment of the present invention.

In FIG. 1, a data processing device control section 1 controls the entire data processing device. The nonvolatile memory 2 is a memory that retains its contents even when the data processing device is powered off, and stores media information 3 therein. The program recording media 9-1 to 9-n store programs for performing various tasks in the data processing device, and the data recording media 7-1 to
7-n stores data used in these programs as well as identifiers 8-1 to 8-n uniquely added to each data recording medium. Program recording medium 9
-1 to 9-n and data recording media 7-1 to 7-n are loaded into the main memory 10 and executed, thereby realizing various tasks in the data processing device. The main memory 10 stores the name of the program currently being executed in the load program name 11.

The keyboard 4, CRT 5, and external storage device 6 are devices for inputting and outputting programs and data from outside the data processing device.

FIG. 2 is a diagram showing the contents of the medium information 3 in FIG. 1. Media information 3 includes the program names of all programs stored in the program recording media 9-1 to 9-n used in the data processing device and data storing data used by each of these programs. Recording medium 7
-1 to 7-n are stored.

Next, the operation of this embodiment will be explained.

FIG. 3 is a flowchart showing the operation of this embodiment.

First, the user transfers the program recording medium 9-1 to 9-n storing the program he/she wants to execute to the external storage device 6.
and load the program. Then, in step 3-1, the program name of the program is stored in the load program name 11 of the main memory 10, and then execution of the program is started. Next, when this program issues an instruction to read or write to the data recording media 7-1 to 7-n and the user sets the data recording media 7-1 to 7-n, in step 3-2, The program name stored in the medium information 3 of the nonvolatile memory 2 is searched using the program name of the program stored in the load program name 11 of the main memory 10. In this search, if there is no program name in medium information 3 that matches the program name of the program stored in load program name 11,
In step 3-5, this program name and the identifiers added to the data recording media 7-1 to 7-n set by the user are stored in the medium information 3, and then the process proceeds to step 3-6. Recording medium 7-1~? - Execute read or write to n.

Also, in the search in step 3-2, load program name 1
If there is a program name in medium information 3 that matches the program name of the program stored in 1, step 3-
3, the data recording media 7-1 to 7- set by the user
The identifiers 8-1 to 8-n added to n are compared with the identifiers corresponding to the matching program names stored in the medium information 3. If the two do not match in this comparison, go to Step 3-4 and ask if you want to read or write to the CRT5, although the medium is different from the one previously used. Display messages such as j. As a result, the user can give some kind of reaction (leave it as is or replace the data recording media 7-1 to 7-n), and according to the user's instructions, proceed to step 3-6 and proceed to step 3-6. Read or write to 7-1 to 7-n. At this time, the data recording medium 7-1 to 7-n approved by the user has an identifier 8-1 to 8-n that is different from the identifier corresponding to the program stored in the medium information 3.
n, the contents of the medium information 3 are updated to the identifiers 8-1 to 8-n.

If the two match in the comparison in step 3-3, the process immediately proceeds to step 3-6 and the data recording media 7-1 to 7-
Execute read or write to n.

After that, if there is an instruction to read or write to the recording medium again, or if a new program is loaded, the necessary parts of the above-mentioned processing are repeated.

(Effects of the Invention) As described above, according to the present invention, when reading from or writing to an external recording medium, it is possible to check whether or not the external recording medium has been previously read from or written to. Therefore, when a different external recording medium is set, a warning to that effect is provided, which has the effect of preventing data destruction and abnormal program operation.

Normally, in a data processing device, multiple programs are often exchanged and executed, and the same data recording medium is often used for processing one program, so the effects of the present invention are significant. Become something.

Furthermore, by storing the data for the above-mentioned check in a non-volatile memory, there is no problem even if the power is turned off (for example, when processing is performed the next day).

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an overview of a method for preventing misuse of an external recording medium according to an embodiment of the present invention, FIG. 2 is a diagram showing the contents of the medium information in FIG. 1, and FIG. 3 is an operation of this embodiment. It is a flowchart which shows. DESCRIPTION OF SYMBOLS 1...Data processing device control part, 2...Nonvolatile memory, 3...Media information, 4...Keyboard, 5...
CRT, 6... external storage device, 7-1 to 7-n...
Data recording medium, 8-1 to 8-n...Identifier, 9-1
~9-n...Program recording medium, 10...Main memory, 11...Load program name.

Claims (1)

[Scope of Claims] A plurality of program recording media storing various programs and a plurality of data recording media storing data used by these programs are used to record the program recording medium and the data recording medium. A method for preventing misuse of these recording media in a data processing device that realizes various tasks by loading programs and data stored on the media into main memory and executing them, the data recording media includes an identifier uniquely added to each data recording medium together with the data; the main memory includes an area for storing the name of a program currently loaded and being executed; A non-volatile device that stores program names of all programs stored in the program recording medium that has run and the identifier that is uniquely added to each data recording medium that stores data used by each program. storage means comprising a memory; means for searching the storage means with a program name stored in the load program name storage area; and means for searching the storage means with a program name stored in the load program name storage area; means for comparing, when a program name is detected in the storage means, an identifier stored in the storage means corresponding to the program name and an identifier added to a data storage medium set by a user; If the search means does not detect a program name in the storage means that matches the program name stored in the load program name storage area, the program name and the identifier added to the data storage medium set by the user are means for storing the identifier in the storage means, and when both identifiers do not match according to the comparison means,
An external device characterized by having means for outputting a message warning the user to that effect, and means for reading or writing to the data recording medium when both identifiers match by the comparison means. Recording media misuse prevention method.