JPH07271520A - Information processor using external storage - Google Patents

Abstract

PURPOSE:To provide an information processor which can warn a user of a fact that a memory card is removed before the program that is just before carried out ends in a normal state when the memory card is inserted and set into the information processor. CONSTITUTION:This information processor uses an external storage 10 including a random number storing means 10b and a device identification number storing means 10c which stores the identification number of the information processor. This information processor is provided with a random number generating means 11 which generates a random number when the use of the storage 10 is started, a 3rd built-in memory 12 which stores the random numbers and also previously stores the identification number of the information processor, a random number comparison means 13 which compares the random numbers stored in the memory 12 and the means 10b with each other, and a device identification number comparison means 14 which compares the device identification numbers stored in the memory 12 and the means 10c with each other.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information processing apparatus for sending / storing input data to / from an external storage device and using the external storage device.

[0002]

2. Description of the Related Art An information processing apparatus which uses a detachable external storage device and inputs and outputs data by using data stored and stored in the external storage device, a control program and the like is disclosed. FIG. 3 shows a schematic configuration diagram of the information processing apparatus and an external storage device inserted and set in the information processing apparatus, which is disclosed in Japanese Patent Laid-Open No. 4-115344.

In FIG. 3, reference numeral 1a denotes a control program for controlling the information processing apparatus, and a first built-in memory (hereinafter referred to as ROM 1a) 1b in which programs such as calculation and address input are stored in advance. A second built-in memory (hereinafter referred to as RAM 1b) for temporarily storing data input to the information processing device, and 2 is a display unit (hereinafter referred to as LCD2) for displaying data input / output to / from the information processing device.
Say. ) Is a liquid crystal display device.

Reference numeral 3 is a display control means for controlling the LCD 2, 4
Is an input means used when inputting data, and specifically corresponds to a keyboard. Reference numeral 5 is an input control means for controlling the input means 4, 6 is a ROM 1a, a RAM 1b, an LCD 2,
It is a central processing unit (hereinafter referred to as CPU 6) that integrally controls the display control unit 3, the input unit 4, and the input control unit 5 in accordance with the above-mentioned control program. 3, an input unit 4, an input control unit 5, and a CPU 6.

On the other hand, reference numeral 10 is a first external memory (hereinafter, referred to as a "first external memory" capable of storing data inputted by the input means 4 and a control program which cannot be stored in the ROM 1a.
It is called RAM 10a. ), The memory card 10 is detachable from an information processing device (not shown).

In such a configuration, when inputting data using the information processing device, the user needs to use the memory card 1
0 is set in the insertion slot of the information processing device. As a result, the CPU 6 sequentially reads the control program stored in the ROM 1a or the RAM 10a, and executes a program such as calculation or address input according to the control program. After that, the user inputs data and the like with the input means 4, such data is displayed on the LCD 2 according to the instruction of the display control means 3, and the data is temporarily stored in the RAM 1b.

When the input of data and the like is finished, the data is finally transferred from the RAM 1b to the RAM 1 of the memory card 10.
0a is transferred / stored, and the above-described calculation or program for inputting an address or the like ends normally.

[0008]

However, if the user accidentally removes the memory card 10 before such a program ends normally, such data is not stored in the RAM 10a of the memory card 10. RAM
1b remains stored in memory card 1
Data will be lost in the 0 RAM 10a. In such a state, the user usually does not notice that data is missing in the RAM 10a.

[0009]

Therefore, the present invention has been made in view of the above-mentioned problems, and is an information processing apparatus that uses an external storage device, and an arithmetic operation executed by the information processing apparatus, Alternatively, it is characterized in that it is determined whether or not a program for inputting an address or the like has normally ended.

The present invention further comprises a random number storage means for storing random numbers, a device identification number storage means for storing a device identification number for identifying an information processing device, and a first external memory for storing data. An information processing device using an external storage device comprising: a random number generating means for generating a random number when starting to use the external storage device; and storing the random number and identifying the information processing device. A third built-in memory in which a device identification number for storing is stored in advance, a random number comparing means for comparing the random numbers stored in the third built-in memory and the random number storing means, and the third built-in memory. Device identification number comparison means for comparing the device identification numbers respectively stored in the device identification number storage means,
A random number storing means, a device identification number storing means, a first external memory, a random number generating means, a third built-in memory, a random number comparing means, and a central processing unit for integrally controlling the device identifying number comparing means. Is characterized by.

[0011]

Since the information processing apparatus of the present invention is provided with the above-mentioned means, when the external storage device is set in the information processing apparatus, the central processing unit performs the processing of (a) to (c) below. To do. (A) When neither the random number nor the device identification number is stored in the random number storage unit and the device identification number storage unit, the random number generated by the random number generation unit is stored in the third built-in memory and the random number storage unit. At the same time, after the device identification number previously stored in the third built-in memory is sent out and stored in the device identification number storage means, the central processing unit makes it possible to access the external storage device. (B) Random number When both the random number and the device identification number are stored in the storage means and the device identification number storage means, the random number comparison means is the third
While comparing the random numbers stored in the built-in memory and the random number storage means with each other, the device identification number comparison means compares the device identification numbers stored in the third built-in memory and the device identification number storage means, respectively. If at least one of the comparison results is different, the processing device warns that a program such as an arithmetic operation or an address input program which has been used immediately before is not normally terminated. ) When both the random number and the device identification number are stored in the random number storage means and the device identification number storage means, the random number comparison means compares the random numbers stored in the third built-in memory and the random number storage means, respectively. The device identification number comparison means compares the device identification numbers stored in the third built-in memory and the device identification number storage means, respectively, and if the comparison results match, the central processing is performed. Enumerations makes it possible to access the external storage device.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention is shown in FIGS. 1 and 2, and the same components as those in the conventional art are designated by the same reference numerals.

FIG. 1 is a schematic block diagram of an information processing apparatus according to the present invention and an external storage device inserted and set in the information processing apparatus. It is assumed that a device identification number peculiar to the device is given in advance for each information processing device.

In FIG. 1, 10b is a memory card 10.
Random number storage means provided in the storage unit for storing random numbers, 11
Is provided in the information processing apparatus, random number generating means for generating a random number when a program stored in the ROM 1a, or a program such as address input is started, 12 is provided in the information processing apparatus, A third built-in memory (hereinafter referred to as RAM 12) 13 that stores the random number generated by the random number generation means 11 and a device identification number for identifying and specifying the information processing device in advance, 13 is an information processing device. A random number comparison means 14 provided inside the random number storage means 10b for comparing the random numbers stored in the RAM 12 is provided inside the information processing apparatus, and the device identification number stored in the RAM 12 and the device identification storage means 10c It is a device identification number comparison means for comparison.

In the above-mentioned configuration, the operation of the information processing apparatus according to the present invention will be described with reference to FIG. 1 according to the flowchart of the present invention in FIG.

First, in step S1, when data is input, the memory card 10 is inserted and set in the insertion slot of the information processing apparatus, and then the process proceeds to step S3. Step S3
In step 1, it is determined whether or not a random number is stored in the random number storage means 10b of the memory card 10, and further, whether or not the device identification number is stored in the device identification number storage means 10c. In the determination, if at least one of the random number and the device identification number is stored, the process proceeds to step S7, and if neither the random number nor the device identification number is stored, the process proceeds to step S5.

In step S5, when the user tries to execute the program using the input means 4, the CPU 6 causes the R
The random number generator 11 is read by reading the control program and the program for arithmetic operation, address input, etc. stored in the OM 1a or the RAM 10a, and then executing the program for arithmetic operation, address input, etc. Generate a random number.

In step S9, the random number is stored in the RAM 12 of the information processing device and the random number storage means 10b of the memory card 10 via the system bus, and the device identification number stored in the RAM 12 is the memory card. The data are stored in the device identification number storage means 10c of 10 respectively, and then the process proceeds to step S15.

On the other hand, in step S7, after comparing the random numbers of the RAM 12 and the random number storage means 10b, the process proceeds to step S11. In step S11, the device identification numbers of the RAM 12 and the device identification number storage means 10c are compared, and then the process proceeds to step S13.

In step S13, step S
7, and it is determined whether or not the random number and the device identification number compared in step S11 match, and if both match, the process proceeds to step S15, and if at least one does not match, the step Proceed to S17.

By the way, in step S15, the memory card 10 can be accessed, and the data input by the user is the RAM 1 of the memory card 10 at this time.
After being written in 0a, the process proceeds to step S21. In step S21, the central processing unit 6 determines whether or not the program for calculation, address input, or the like has ended normally, and if it has not ended normally, the process proceeds to step S19.
On the other hand, if it has ended normally, the process proceeds to step S23.

In step S17, the device identification number stored in the device identification number storage means 10c is displayed on the LCD 2 and before the program in the information processing device used immediately before by the user is normally terminated. Memory card 10
Has been removed, at this time the device identification number of the information processing device that was used immediately before, or warns the user that the process in the information processing device that was used immediately before has terminated abnormally,
After this, the process proceeds to step S19. In step S19, it is determined whether or not the memory card 10 is inserted and set in the information processing apparatus. If the memory card 10 is inserted and set, the process proceeds to step S3, while if it is not inserted and set, the process ends.

In step S23, the random numbers in the RAM 12 and the random number storage means 10b are erased, and the process proceeds to step S25. In step S25, the device identification number in the device identification number storage means 10c is erased, and then the process ends.

As described above, according to the above-described flow chart, the random number storage means 10b and the device identification number storage means 10c of the memory card 10 store random numbers and device identification numbers respectively, or there are four types when there are no random numbers and device identification numbers. Table 1 summarizes the major steps of each
Shown in.

[0025]

[Table 1]

According to Table 1, if (a) the random number is not stored in the random number storage means 10b and the device identification number is not stored in the device identification number storage means 10c, the memory card is stored. Access to 10,
Further, (b) when the random number is stored in the random number storage means 10b and the device identification number is stored in the device identification number storage means 10c, the memory card 10 can be accessed.

On the other hand, (c) when the random number is stored in the random number storage means 10b and the device identification number is not stored in the device identification number storage means 10c, and (d) the random number is stored in the random number storage means 10b. If the device identification number is not stored and the device identification number is stored in the device identification number storage means 10c, the program of the information processing device used immediately before has not been normally terminated. The user can be warned.

As a result, the user receives such a warning, reinserts the memory card 10 into the information processing apparatus used until immediately before, and the data temporarily stored in the RAM 1b is stored in the memory card 10. Data can be written in the RAM 10a, and as a result, no data is lost in the memory card 10.

In the above embodiment, the random number generating means 11 of the information processing device is supposed to generate a random number.
It is not limited to random numbers and may be any code that randomly generates a code.

Further, in the above-mentioned embodiment, the example in which the control program for controlling the information processing apparatus and the program for arithmetic operation or address input are stored in advance in the ROM 1a has been described, but the present invention is not limited to this. , A readable / writable storage device is provided in the information processing device instead of the ROM 1a, both programs are stored in the RAM 10a in advance, and the memory card 10 is inserted into the information processing device. May be transferred to the RAM.

[0031]

According to the above description, when data is input to the information processing device, the user accidentally removes the external storage device before a program for arithmetic operation or address input is normally completed. , When the external storage device is inserted and set in an information processing device different from the information processing device,
As a result of warning the user that the external storage device has been removed before the program for arithmetic operation or address input etc. ends normally, data loss in the first external memory in the external storage device is detected. Can be prevented.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of an information processing apparatus according to the present invention and an external storage device inserted and set in the information processing apparatus.

FIG. 2 is a flowchart when operating the information processing apparatus according to the present invention.

FIG. 3 is a schematic configuration diagram of a conventional information processing apparatus and an external storage device inserted and set in the information processing apparatus.

[Explanation of symbols]

 1a ROM 1b RAM 2 LCD 3 display control means 4 input means 5 input control means 6 CPU 10 memory card 10a RAM 10b random number storage means 10c device identification number storage means 11 random number generation means 12 RAM 13 random number comparison means 14 device identification number comparison means

Claims (6)

[Claims] 1. An information processing device using an external storage device, characterized by determining whether or not a program executed in the information processing device, a program for inputting an address, or the like has ended normally. An information processing device that uses an external storage device. 2. A random number storage means (10b) for storing a random number,
An information processing device using an external storage device, which comprises a device identification number storage means (10c) for storing a device identification number for identifying an information processing device, and a first external memory (10a) for storing data. Therefore, the information processing device stores a random number generating means (11) for generating a random number when starting to use the external storage device, the random number, and a device identification number for identifying the information processing device in advance. The third built-in memory (12), and the third
Random number comparing means (13) for comparing the random numbers respectively stored in the internal memory (12) and the random number storing means (10b), the third internal memory (12) and the device identification number storing means (10c) Device identification number comparing means (14) for comparing the device identification numbers respectively stored in the above, the random number storage means (10b), the device identification number storage means (10c), the first external memory (10a), and the random number generator. A central processing unit (6) for centrally controlling the means (11), the third built-in memory (12), the random number comparing means (13), and the apparatus identification number comparing means (14). An information processing device that uses an external storage device. 3. The random number generated by the random number generating means (11) when the random number and the device identification number are not stored in the random number storage means (10b) and the device identification number storage means (10c). The device identification number stored in the third built-in memory (12) and the random number storage means (10b) and previously stored in the third built-in memory (12) is the device identification number storage means (10c). 3. The information processing apparatus using the external storage device according to claim 2, wherein the central processing unit (6) enables access to the external storage device after being sent and stored in the external storage device. 4. When the random number storage means (10b) and the device identification number storage means (10c) both store a random number and a device identification number, the random number comparison means (13) includes the third built-in means. The random numbers stored in the memory (12) and the random number storage means (10b) are compared with each other, and the device identification number comparison means (14) is provided with the third built-in memory (12) and the device identification number storage means. Comparing the device identification numbers stored in (10c), respectively, the central processing unit (6), if at least one of the comparison results are different, calculate in the information processing device used immediately before, An information processing apparatus using an external storage device according to claim 2 or 3, which warns that a program for inputting an address or the like has not ended normally. 5. When both the random number and the device identification number are stored in the random number storage means (10b) and the device identification number storage means (10c), the random number comparison means (13) has the third built-in means. The random numbers stored in the memory (12) and the random number storage means (10b) are compared with each other, and the device identification number comparison means (14) is provided with the third built-in memory (12) and the device identification number storage means. The device identification numbers stored in (10c) are compared, and if the comparison results match, the central processing unit (6) enables access to the external storage device. An information processing apparatus using the external storage device according to claim 2, 3, or 4. 6. The information processing using the external storage device according to claim 2, wherein the start of use of the external storage device is the start of execution of the program such as the calculation or address input. apparatus.