JPH0764809A - Data processor - Google Patents

Abstract

PURPOSE:To design and provide a maintenance processing program with a large number of degrees of freedom of design and less burden to design without degrading the use efficiency of a memory in a device main body by providing an application program on a memory card with the maintenance processing program to be executed at the time of pulling out the memory card. CONSTITUTION:When the power source of a power system 11 is turned on, a CPU 1 executes the application program in a memory card 4 based on a basic soft. If a register request routine is included in the executing application program, an interrupt maintenance processing routine (maintenance processing program) included in the application program executed at present is registered in a RAM 2 based on this included routine. When the memory card 4 is pulled out of the device main body during execution of the application program, the CPU 1 controls true device to perform the maintenance processing in accordance with the maintenance processing program registered in the RAM 2 in the device main body.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data processing device which processes data based on a program on a memory card.

[0002]

2. Description of the Related Art Conventionally, there has been known a data processing device in which a memory card is detachably attached to a main body of the device and data processing is performed based on an application program on the attached memory card. The device body is provided with a slot or the like for mounting a memory card.

In this type of data processing device, it is necessary to prevent malfunctions due to sudden removal of the memory card. In particular, when the memory card is pulled out while the control address (program counter) indicates the address on the memory card, that is, when the application program on the memory card is being executed, the object code is garbled in an instant. If the value becomes undefined, the program may run out of control, adversely affecting the data in the memory or memory card in the main body of the device and causing an irreversible malfunction.

In order to avoid such malfunction, conventionally,
A cover is provided on the slot, and when this cover is opened, the fact is detected and the software inside the device is notified by means such as hardware interrupt, and the access to the memory card is prohibited and the control is performed. It was designed to be quickly transferred to the memory on the device body side.

When such access is prohibited, it is necessary to interrupt the security processing such as displaying a message for warning or operating instruction, closing an open file, etc. Conventionally, the interrupt maintenance processing routine for executing the interrupt maintenance processing has been registered by the following method.

That is, (1) an interrupt maintenance processing routine is provided on the basic software (operating system), (2) an application program executed in the main body of the device before the control is transferred to the application program on the memory card. (3) The application program on the memory card is provided with an interrupt maintenance processing routine. When the application program on this memory card is executed, the entire application program is stored in the main body of the device. After copying to the internal memory, the control is passed to the copied application program.

[0007]

However, in the method in which the operating system has the interrupt maintenance processing routine as in the above (1), the display form of the message for warning and operation instruction becomes uniform, There is a problem that the designer of the application program cannot freely set the display form of the message, and after the message is displayed and the file is closed, the power is turned off for safety. It was

Further, as in the above (2), in the system in which the application program executed in the apparatus main body has an interrupt processing routine, the application program arranged in the memory card and the memory in the apparatus main body are arranged. Since it is functionally distinguished from the program,
There was a problem that it was a burden in designing the application program.

Further, in the method of copying the entire application program on the memory card to the memory in the main body of the apparatus as described in (3) above, the execution start of the application program is delayed by the time for performing the copying process and the main body of the apparatus is delayed. Since the internal memory requires a large copy data storage area, there is a problem in that the memory usage efficiency decreases.

The present invention has been made under the above circumstances, and an object thereof is to provide a maintenance processing program to be executed when a memory card is pulled out with a high degree of freedom in design, a light design load, and a device. It is an object of the present invention to provide a data processing device which can be designed and equipped in such a manner that the use efficiency of the memory in the main body is not deteriorated.

[0011]

In order to achieve the above object, the present invention provides a data processing device for performing data processing according to an application program recorded in a memory card, wherein the application program recorded in the memory card is The data processing device includes a security processing program to be executed when the memory card is pulled out from the apparatus main body during execution of the application program, and the data processing device performs the security processing when executing the application program recorded in the memory card. Registration means for pre-registering only the program in the memory in the main body of the device, and maintenance according to the maintenance processing program registered in the memory in the main body of the device when the memory card is pulled out from the main body of the device during execution of the application program Control processing And control means for are provided.

[0012]

The registering means of the data processing device, when executing the application program recorded in the memory card,
Only the security processing program included in the application program is recorded in advance in the memory in the apparatus body. Then, when the memory card is pulled out from the main body of the apparatus while the application program is being executed, the control means controls to perform the security processing according to the security processing program registered in the memory in the main body of the apparatus.

As described above, since the security processing program is included in the application program on the memory card, the degree of freedom in design is high and the load on design is light. Further, since only the security processing program is registered in the memory in the device body, not the entire application program, the use efficiency of the memory in the device body is not deteriorated.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The first and second embodiments of the present invention will be described below with reference to the drawings.

[First Embodiment] FIG. 1 is a block diagram showing the schematic arrangement of a data processing apparatus according to the first and second embodiments of the present invention. This data processing device performs various data processing with the CPU 1 as a core.
A power supply system 11 including a RAM 2, a ROM 3, an input device 6 such as a keyboard, a display device 7 such as a liquid crystal touch panel, a printing device 8 such as an inkjet printer, a communication port 9, a power supply circuit 11a, and a battery pack 11b via a bus B.
Are connected. Further, the data processing device can use the memory card 4, and the memory card reader / writer 10 is connected to the CPU 1 via the bus B.

Although not shown in the drawings, a slot for allowing the memory card 4 to be attached to and detached from the main body of the data processing apparatus is formed in the housing of the present data processing apparatus. A cover is provided to prevent deviation from the body or accidental withdrawal. Then, the interrupt control unit 5 that detects the opening of the cover and outputs a hardware interrupt signal to the CPU 1
It is connected to PU1.

FIG. 2 is an explanatory diagram for explaining the contents of data stored in the memory. The interrupt controller 5 detects the opening of the cover when the memory card 4 is attached or detached, and the hardware interrupt. CP signal (cover open interrupt signal)
Output to U1. The RAM 2 has a registration area E for registering an interrupt maintenance processing routine 41a, which will be described later, recorded in the memory card 4. Basic software (operating system) 31 is preset in the ROM 3, and the basic software 31 includes
A cover open interrupt processing routine 31a and a jump destination designation routine 31b are included.

The memory card 4 includes the basic software 3
1 stores a user program (application program) 41 described in a format that can be executed by the I. No. 1, and the user program 41 includes an interrupt maintenance processing routine 41a to be executed when the cover is opened and this interrupt maintenance processing routine. A registration request routine 41b for requesting the basic software 31 to register 41a in the registration area E of the RAM 2 is included.

Next, the interrupt maintenance processing routine 41a included in the user program 41 in the memory card 4 is stored in the RAM.
The process of registering in No. 2 will be described with reference to the flowchart of FIG.

When the power of the power supply system 11 is turned on (step S1), the CPU 1 activates the basic software 31 to perform necessary self-checks and various initial settings (step S1).
2). Then, the user program 41 in the memory card 4 is executed based on this basic software 31 (step S3). Then, it is determined whether or not the user program 41 currently being executed includes the registration request routine 41b (step S4).

As a result, if the registration request routine 41b is included, based on the registration request routine 41b,
The interrupt maintenance processing routine 41a included in the user program 41 currently being executed is registered in the RAM 2 (step S5). In this case, on the user program 41 side, that is, in the registration request routine 41b, the address and size of the interrupt maintenance processing routine 41a are passed to the basic software 31 as parameters to make a registration request. Then, the basic software 31 side performs the registration processing by reading the interrupt maintenance processing routine 41a from the memory card 4 according to these parameters and writing it in the registration area E of the RAM 2. After performing this registration process, execution of the user program 41 in the memory card 4 is restarted (step S6). When it is determined in step S4 that the registration request routine 41b is not included, step S5 is skipped and the process proceeds to step S6 to restart the execution of the user program 41 in the memory card 4.

Next, the interrupt maintenance process when the cover of the memory card 4 is opened while the user program 41 in the memory card 4 is being executed will be described with reference to the flowchart of FIG.

When a hardware interrupt signal is input from the interrupt controller 5 due to the cover of the memory card 4 being opened (step S21), the CPU 1 causes the cover open interrupt processing routine in the basic software 31. 31a
Is activated (step S22). In this cover open interrupt processing routine 31a, first, the basic software 3
Default processing on the first side is performed (step S23). As the default process, for example, a process of closing the file in order to normally save the file in use, or turning off the power supplied to the memory card 4 is performed.

Next, it is determined whether or not the interrupt maintenance processing routine 41a in the memory card 4 is registered in the RAM 2 (step S24). As a result, if the interrupt maintenance processing routine 41a is registered in the RAM 2, that RAM
Access to the memory card 4 is prohibited by executing the interrupt maintenance processing routine 41a in step 2 (step S25). This access prohibition means that if the memory card 4 is continued to be accessed after the cover is opened, the object code becomes undefined when the memory card 4 is pulled out following the cover open, causing a program runaway. Because harmful effects may occur,
This is done to prevent this adverse effect.

In the interrupt maintenance processing routine 41a, the default processing performed by the basic software 31 in step S23 is insufficient. As a method of this processing, for example, as shown in FIG. 5, a display message 71 and an input key 7 are displayed on the touch panel screen 70 of the display device 7.
2 (menu key 72a and end key 72b in the figure) are displayed, and guidance 7 for the function of each input key 72 is displayed.
This is done by displaying 3.

Then, it is determined whether or not the jump destination is designated, that is, whether or not the menu key 72a is touched in the example of FIG. 5 (step S26). As a result, when the menu key 72a is touched and the jump destination is designated, the touched menu key 72 is determined based on the jump destination designation routine 31b in the basic software 31.
Sham to the program corresponding to a (step S2
7).

As this jump destination program, for example, a program for displaying a processing menu is suitable. The method of designating the jump destination in the user interrupt processing routine 41a can be performed by designating the path such as the program name of the program of the jump destination, and when information is to be passed to the jump destination, the format of the data or file on the RAM 2 You can store it in. However, in step S23, the default processing is performed by the basic software 31, so this must be taken into consideration in the interrupt maintenance processing routine 41a.

On the other hand, when the end key 72b is touched instead of the menu key 72a, the power is turned off (step S29) and the process is ended. When it is determined in step S24 that the interrupt maintenance routine 41a is not registered in the RAM 2, a default message is displayed and key input is waited (step S28). Then, the power is turned off (step S29), and the process ends.

As described above, by registering the interrupt maintenance processing routine 41a in the memory card 4 in the RAM 2 by the basic software 31, it is possible to freely design the processing required when the card access is prohibited, and It is possible to prepare for the interrupt maintenance processing routine 41a, and it becomes possible to give flexibility to the processing required when the card access is prohibited. Further, by providing the basic software 31 with a jump destination designation routine 31b,
The jump destination control when the card access is prohibited can be performed by the interrupt maintenance processing routine 41a in the memory card 4.

[Second Embodiment] Next, a second embodiment will be described. In the second embodiment, the basic software 31 does not partially bear the security processing required when the card access is prohibited, but the interrupt security processing routine 41a recorded in the memory card 4 bears all the security processing. Also, the first
In the embodiment, the interrupt maintenance processing routine 41a is only registered in the RAM 2, but in the second embodiment, in addition to this, the vector which is the jump destination pointer at the time of interruption is rewritten. This vector rewriting function is included in the basic software 31, and the user program in the memory card 4 requests the basic software 31 from the user program side. At this time, the pointer written in the vector becomes the start address of the copied interrupt protection processing routine 41a, that is, the start address of the registration area E.

Next, the interrupt protection processing when the card access is prohibited in the second embodiment will be described with reference to the flowchart of FIG.

When the hardware interrupt signal is input from the interrupt controller 5 by opening the cover of the memory card 4 (step S31), the vector indicates the user interrupt process. Activates the interruption maintenance processing routine 41a registered in the registration area E of the RAM 2 (step S32), and executes the interruption maintenance processing according to the interruption maintenance processing routine 41a (step S33).

In this case, in this embodiment, since the basic software 31 does not perform any processing required when the card access is prohibited, all the processing that should be performed in the interrupt maintenance processing in step S33 is performed by the user in the memory card 4. It is entrusted to the design of the program (interrupt maintenance routine 41a). Therefore, the interrupt maintenance processing routine 41 executes the processing of closing only the data created or updated and the necessary files during the execution of the user program up to that point.
It can be placed in a. Further, when jumping to another program and passing control to the jump destination program, it is possible to leave necessary information in the RAM 2 in the form of data or file for the jump destination program.

Next, for example, in response to the guidance display shown in FIG. 5 or the like, it is determined whether or not the jump destination is designated (step S34). As a result, when the jump destination is designated, the jump is designated to the designated jump destination program based on the jump destination designation routine 31b in the basic software 31 (step S35). on the other hand,
When the jump destination is not designated, the power is turned off (step S36), and the process ends.

As described above, the basic software 31 registers the interrupt maintenance processing routine 41a in the memory card 4 in the RAM 2 and rewrites the interrupt vector when the card access is prohibited, so that the processing required when the card access is prohibited is performed. It can be freely designed and prepared in the interrupt maintenance processing routine 41a in the memory card 4, and flexibility can be given to the maintenance processing required when the card access is prohibited. Further, since the basic software 31 does not perform any default processing, it is possible to shorten the time required for the default processing. For example, since many files are opened, the file closing process in the default process takes time, and the process for avoiding a situation in which the execution of the guidance display in the user interrupt process routine 41a is delayed is performed by the user program (interrupt). It can be prepared on the side of the maintenance processing routine 41a).

Further, by providing the basic software 31 with the jump destination designation routine 31b, the jump destination control when the card access is prohibited can be performed by the interrupt maintenance processing routine 41a in the memory card 4.
At this time, since the default processing is not performed on the basic software 31 side, the user program side can freely design how to pass the information to the jump destination. Further, since only the interrupt maintenance processing routine 41a is registered without registering the entire user program in the RAM 2, RA
The use efficiency of M2 does not decrease.

[0037]

As described above, according to the present invention,
The security processing program to be executed when the memory card is removed, that is, when the card access to the memory card is prohibited, is recorded in the memory card as a part of the application program, and only this security processing program is registered in the memory in the main body of the device. Since the security processing is performed according to the registered security processing program when the card is removed, the degree of freedom in designing the security processing program is high, the design burden is light, and the efficiency of memory usage in the main unit of the device is not reduced. It becomes possible to design and equip in such a form.

Specifically, for example, the user program can freely design the display of a message such as a warning to the operator or an explanation of the operation when the card is pulled out, and the flow of processing by the system when the card is pulled out Not only can the system be shut down by turning it off, but it can also be made flexible by jumping to another program. In addition, saving files and data should only be done when necessary, and the system should do the default. It is possible to achieve effects such as saving unnecessary wasteful processing.

[Brief description of drawings]

FIG. 1 is a block diagram showing a schematic configuration of a data processing device according to first and second embodiments of the present invention.

FIG. 2 is an explanatory diagram for explaining data contents stored in a memory.

FIG. 3 is a flowchart showing registration processing of an interrupt maintenance processing routine.

FIG. 4 is a flowchart showing an interrupt maintenance process in the first embodiment.

FIG. 5 is a diagram showing a display example of a message such as a warning or an explanation of an operation as an example of interrupt maintenance processing.

FIG. 6 is a flowchart showing an interrupt maintenance process in the second embodiment.

[Explanation of symbols]

 1 ... CPU 2 ... RAM 3 ... ROM 4 ... Memory card 5 ... Interrupt control unit 7 ... Display device 10 ... Memory card reader / writer 31 ... Basic software 31a ... Cover open interrupt processing routine 31b ... Jump destination designation routine 41 ... User program 41a ... Interrupt maintenance processing routine 41b ... Registration request routine

Claims (2)

[Claims] 1. A data processing device for performing data processing according to an application program recorded on a memory card, wherein the application program recorded on the memory card is pulled out from the main body of the device during execution of the application program. A registration processing unit that includes a maintenance processing program to be executed when the data processing apparatus executes the application program recorded in the memory card; A control means for controlling the security processing to be performed in accordance with the security processing program registered in the memory inside the apparatus body when the memory card is pulled out from the apparatus body during execution of the application program. Characterizing day Processing apparatus. 2. The security processing program specifies a program to be executed when the memory card is pulled out from the main body of the apparatus, and the data processing apparatus executes jump control to the specified jump destination program. The data processing device according to claim 1, wherein the data processing device is a data processing device.