JP2019067335A - Electronic device and memory region allocation program - Google Patents

Abstract

To prevent abnormality such as performance deterioration and operation failure.SOLUTION: In an electronic device: a memory management part 118 assigns a first region for applications for functional addition and expansion and a second region for mutually different functions to an RAM 115; a panel part 105 displays a mode selection screen with various reduction width sizes of the second region; and a system control part 121 provides the memory management part 118 with an instruction for assigning a memory region on the basis of a mode selected on the mode selection screen. Moreover, the system control part 121 obtains an empty region of the second region in the selected mode and causes the memory management part 118 to assign the empty region to the first region. Consequently, the empty region of the second region can be added to the first region for the applications for the functional addition and expansion, which can avoid pressure imposed on the memory region in association with the execution of the applications.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an electronic device and memory area allocation program suitable for area allocation of volatile memory.

  For example, in an image forming apparatus such as MFP (Multifunction Peripheral) which is one of electronic devices, a printing function, a copying function, a fax (Facsimile) function, a scanner function, a data transmitting / receiving function via a network, etc. There is a model that Further, in the image forming apparatus provided with these various functions, the processing capacity of various jobs is improved by efficiently allocating the memory area of random access memory (RAM) which is a volatile memory used in image processing. It is done.

  According to Patent Document 1, the data size of each color bit map data to be printed out is acquired, and reception of each color bit map data is received according to the acquired data size, as such a memory area is efficiently allocated. We have proposed a print control method to set the size of the buffer.

Unexamined-Japanese-Patent No. 2003-341152

  In the print control method of Patent Document 1 described above, the size of the reception buffer for each color bitmap data is set according to the data size of each color bitmap data to be printed out, so that the RAM can be used efficiently.

  By the way, in the image forming apparatus, assuming that any one of the printing function, the copying function, the fax function, the scanner function, and the data transmitting / receiving function described above is processed in parallel, an application corresponding to each function to RAM. Memory area may be allocated for execution. For example, an application for adding or expanding a function may be installed in nonvolatile memory such as electrically erasable and programmable read only memory (EEPROM), solid state drive (SSD), or hard disk drive (HDD). In such a case, the installed application may be loaded into RAM and then used in order to speed up the execution processing by the application for adding or extending the function.

  In such a case, when the setting method of the size of the reception buffer in the printing control method of Patent Document 1 is used, a shortage of memory size may occur with the execution of the application loaded in the RAM. When such a memory size shortage occurs, the memory area is compressed as the application is executed, which may cause an abnormality such as performance degradation or malfunction.

  The present invention has been made in view of such a situation, and it is an object of the present invention to provide an electronic device and a memory area allocation program capable of solving the above-mentioned problems.

The electronic device according to the present invention comprises: a memory management unit which assigns a first area for application for adding or extending a function and a second area for different functions to volatile memory; A panel unit that displays a mode selection screen in which the reduction width of the area size is changed; and a system control unit that instructs the memory management unit to allocate a memory area based on the mode selected on the mode selection screen The system control unit determines a free area of the second area in the selected mode, and causes the memory management unit to allocate the free area to the first area. Do.
Further, the reduction width of the size of the second area is characterized by being different for each of the functions.
In addition, when the system control unit disables the use by any of the functions, the system management unit causes the memory management unit to set an area allocated for the disabled function as the first area. It is characterized by assigning.
The memory area allocation program according to the present invention is a memory area allocation program to be executed by a computer that controls allocation of the volatile memory area of the electronic device, and the memory management unit adds functions to the volatile memory. A step of assigning a first area for application for extension and a second area for different functions, and displaying a mode selection screen in which the reduction width of the size of the second area is changed by the panel unit Causing the computer to execute the following steps: instructing the memory management unit to allocate the memory area based on the mode selected on the mode selection screen by the system control unit; Determine a free area of the second area in the selected mode; And, wherein the causing allocating the free space to the first region.
In the electronic device and memory area allocation program of the present invention, the memory management unit causes the volatile memory to store a first area for application for adding or extending a function, and a second area for different functions. Is assigned, and the panel unit displays the mode selection screen in which the reduction width of the size of the second area is changed, and the system control unit instructs the memory management unit on the basis of the mode selected on the mode selection screen. Instruct the assignment of
Further, the system control unit obtains a free space of the second region in the selected mode, and causes the memory management unit to allocate the free space to the first region.
As a result, since the free area of the second area can be added to the first area for application of function addition or extension, it is possible to avoid pressure on the memory area accompanying the execution of the application.

  According to the electronic device and the memory area allocation program of the present invention, it is possible to avoid the pressure of the memory area accompanying the execution of the application, so that it is possible to prevent an abnormality such as a decrease in performance or a malfunction.

It is a figure for describing one Embodiment at the time of applying electronic equipment of the present invention to MFP. FIG. 2A illustrates an example of memory area allocation in the standard setting mode, and FIG. 2B illustrates a selection mode. FIG. 2C is a diagram showing an example of allocation of memory areas in FIG. 2 and FIG. 2C is a diagram showing an example of a mode selection screen. FIG. 3A is an illustration showing allocation of a memory area in an automatic mode, for explaining an example of dividing a memory area of a RAM according to a selected mode by the memory management unit of FIG. 1; FIG. 3B is a view showing the allocation of memory areas in the print priority mode, and FIG. 3C is a view showing the allocation of memory areas in the copy priority mode. FIG. 4A illustrates an example of allocation of a memory area of a RAM according to a selected mode by the memory management unit of FIG. 1, and FIG. FIG. 4B is a diagram showing the allocation of memory areas in the scanner priority mode, and FIG. 4C is a diagram showing the allocation of memory areas in the user setting mode. It is a flowchart for demonstrating the allocation process of the area | region of RAM of FIG.

  Hereinafter, an embodiment of the electronic device of the present invention will be described with reference to FIGS. 1 to 5. An example of the electronic device in the following description is an MFP (a multi-functional peripheral device equipped with a print function, a copy function, a fax (Facsimile) function, a scanner function, a data transmission / reception function via a network, etc.). Multifunction Peripheral). Also, in the following, for example, it is assumed that an application for adding or extending a function is stored in the non-volatile memory. For example, an EEPROM (electrically erasable and programmable read-only memory) 116 shown in FIG. 1 described later, a solid state drive (SSD) (not shown), an HDD (Hard Disk Drive) 106 shown in FIG. Can. An application for adding or extending a function is assumed to be stored in the EEPROM 116 for the convenience of description.

  First, as shown in FIG. 1, the MFP 100 includes a scanner unit 101, a printer unit 102, a FAX unit 103, an I / F (interface) 104, and a control unit 110 that controls the operation of the panel unit 105 and the HDD 106.

  The scanner unit 101 is a device that converts an image on a sheet (not shown) read by an image sensor (not shown) into digital image data and inputs the digital image data to the control unit 110. The printer unit 102 is a device that prints an image on a sheet (not shown) based on print data output from the control unit 110. The FAX unit 103 is a device that transmits data output from the control unit 110 to a facsimile serving as the other party through a telephone line and receives data from the other party facsimile and inputs the data to the control unit 110.

  The I / F 104 is responsible for communication with other MFPs and user terminals (not shown) via a network. The I / F 104 may also be in charge of communication with a content server, a web server, etc. (not shown). The panel unit 105 is a device having, for example, a print function, a copy function, a fax function, a scanner function, a data transmission / reception function via a network, and a touch panel for displaying various settings and a hardware key. Further, the panel unit 105 displays a mode selection screen 105A shown in FIG. 2 described later. The HDD 106 is a storage device that stores application programs and the like for providing various functions of the MFP 100. The HDD 106 also has a user box for storing a print job registered from the user terminal side.

  Control unit 110 is a processor that executes an application program such as an authentication program, an image forming program, a control program, and the like to control the overall operation of MFP 100. The control unit 110 includes a scanner control unit 111, a printer control unit 112, a fax control unit 113, a communication control unit 114, a random access memory (RAM) 115, an electrically erasable and programmable read only memory (EEPROM) 116, and an image processing unit 117. A memory management unit 118, a panel operation control unit 119, an HDD control unit 120, and a system control unit 121 are provided. Also, these are connected to the data bus 122.

  The scanner control unit 111 controls the reading operation of the scanner unit 101. The printer control unit 112 controls the printing operation of the printer unit 102. The fax control unit 113 controls data transmission and reception operations of the fax unit 103. The communication control unit 114 controls transmission and reception of data and the like via the network via the I / F 104. The RAM 115 is a work memory for executing a program. Also, although the RAM 115 will be described in detail later, the memory management unit 118 allocates a memory area suitable for use, for example, an application for adding or expanding a function, a print function, a copy function, a fax function, a scanner function, etc. Be The EEPROM 116 stores a control program for generating an operation check of each part and a start sequence. The EEPROM 116 also stores an application for adding or extending a function.

  The image processing unit 117 performs image processing (rasterization) on the image data read by the scanner unit 101. The image processing unit 117 also performs image processing (rasterization) on the print job registered in the user box of the HDD 106. The system control unit 121 causes the RAM 115 to temporarily store the print data subjected to the image processing by the image processing unit 117.

  The memory management unit 118 allocates a memory area of the RAM 115 according to an instruction of the system control unit 121, although details will be described later. Note that allocation of a memory area by the memory management unit 118 is performed at the time of activation from power-off of the MFP 100 or at the time of restart. The panel operation control unit 119 controls the display operation of the panel unit 105. The panel operation control unit 119 also receives settings such as printing, copying, faxing, scanning, and data transmission / reception via a network via the panel unit 105. Further, panel operation control unit 119 receives, via panel unit 105, mode selection on mode selection screen 105A shown in FIG. 2C described later. The HDD control unit 120 controls reading and writing of data with respect to the HDD 106. The system control unit 121 controls cooperative operation of each unit. Further, when the panel operation control unit 119 receives a mode selection via the panel unit 105, the system control unit 121 instructs the memory management unit 118 to allocate a memory area of the RAM 115.

  Next, allocation of a memory area of the RAM 115 by the memory management unit 118 will be described with reference to FIG. In the following, for convenience of explanation, it is assumed that the size of the memory area of the RAM 115 is 256 MB. In the allocation of the memory area of the RAM 115, the area 115a is for printing, the area 115b is for copying, the area 115c is for facsimile, the area 115d is for scanning, and the area 115e is for adding or expanding a function. It shall be for the application. In the standard setting mode, the area 115 e is allocated to 128 MB, and the areas 115 a to 115 d are allocated to 32 MB, respectively. The area 115 e is not limited to the application for adding or extending a function, and may be for an application other than the print function, the copy function, the fax function, and the scanner function, for example. In addition, the size of each of the areas 115a to 115e can be changed.

  First, FIG. 2A shows an example of memory area allocation in the standard setting mode. When executing an application for adding or extending a function, the application stored in the EEPROM 116 is loaded in the area 115 e. Here, although the area 115e is used as a work area of the application for adding or expanding a function, the area 115e may become tight in some cases as the application loaded in the area 115e is executed. In this way, if the area 115 e becomes tight, it is also predicted that the performance of the added or expanded function will be reduced.

  In this case, as shown in FIG. 2B, by reducing the sizes of the printing area 115a, the copying area 115b, the fax area 115c, and the scanner area 115d, the functions can be added or expanded. The size of the area 115e for the application can be expanded. Here, for example, it is assumed that the sizes of the printing area 115a, the copying area 115b, the fax area 115c, and the scanner area 115d are changed from 32 MB to 24 MB, respectively. As a result, the size occupied by the areas 115a to 115d is reduced from 128 MB to 96 MB, so that a free area 115f of 32 MB is generated. In this case, the system control unit 121 obtains an area 115 a for printing, an area 115 b for copying, an area 115 c for FAX, and an empty area 115 f associated with the reduction of the area 115 d for scanner. In addition, at the time of start-up from power off of MFP 100 or at the time of restart, system control unit 121 causes memory management unit 118 to set obtained free area 115 f as application area 115 e for addition or extension of functions. Instruct to assign. As a result, the size of the area 115 e is increased from 128 MB to 160 MB, so that the area 115 e can be prevented from becoming tight.

  FIG. 2C shows a mode selection screen 105A for selecting the allocation of the memory area displayed by the panel unit 105. The mode selection screen 105A includes an automatic mode selection field 105a, a print priority mode selection field 105b, a copy priority mode selection field 105c, a fax priority mode selection field 105d, a scanner priority mode selection field 105e, and a user setting mode A selection field 105f and a selection field 105g for the standard setting mode are displayed. When one of these selection fields 105a to 105g is selected, the allocation of the memory area of the RAM 115 is changed as shown in FIGS. 3 and 4 described later. When the selection field 105g is selected, the respective areas 115a to 115e are allocated as shown in FIG. 2 (a). In this case, the free space 115 f does not occur. On the other hand, when one of the selection fields 105a to 115f is selected, the size of each of the areas 115a to 115e is allocated as shown in FIG. 2 (b). In this case, the free space 115 f is generated.

  Next, with reference to FIGS. 3 and 4, an example of the allocation of the memory area of the RAM 115 based on the mode selection by the memory management unit 118 will be described. FIG. 3A shows allocation of memory areas when the automatic mode of the selection field 105a is selected on the mode selection screen 105A of FIG. 2C. That is, in the automatic mode, the sizes of the printing area 115a, the copying area 115b, the fax area 115c, and the scanner area 115d are changed from 32 MB to 24 MB in the standard setting mode. As described above, the size occupied by the areas 115a to 115d is reduced from 128 MB to 96 MB, thereby generating a free area 115f of 32 MB. In this case, the system control unit 121 allocates the free area 115 f to the application area 115 e for adding or extending a function to the memory management unit 118 when the MFP 100 is started from the power off or restarted. To tell.

  FIG. 3B shows the allocation of memory areas when the print priority mode of the selection field 105b is selected on the mode selection screen 105A of FIG. 2C. That is, in the print priority mode, the size of the printing area 115a is changed from 32 MB to 30 MB in the standard setting mode. Further, the sizes of the copy area 115b, the fax area 115c, and the scanner area 115d are changed from 32 MB in the standard setting mode to 24 MB, respectively. As a result, the size occupied by the areas 115a to 115d is reduced from 128 MB to 102 MB, resulting in a free area 115 f of 26 MB. In this case, as described above, when the system control unit 121 starts up or restarts the MFP 100 from the power-off state, the memory management unit 118 uses the free space 115 f as an application for adding or extending a function to the memory management unit 118. It is instructed to assign to the area 115e.

  FIG. 3C shows the allocation of memory areas when the copy priority mode of the selection field 105c is selected on the mode selection screen 105A of FIG. 2C. That is, in the copy priority mode, the size of the copy area 115b is changed from 32 MB in the standard setting mode to 30 MB. Also, the sizes of the printing area 115a, the fax area 115c, and the scanner area 115d are changed from 32 MB to 24 MB in the standard setting mode. As a result, the size occupied by the areas 115a to 115d is reduced from 128 MB to 102 MB, resulting in a free area 115 f of 26 MB. In this case, as described above, when the system control unit 121 starts up or restarts the MFP 100 from the power-off state, the memory management unit 118 uses the free space 115 f as an application for adding or extending a function to the memory management unit 118. It is instructed to assign to the area 115e.

  FIG. 4A shows the allocation of memory areas when the FAX priority mode in the selection field 105d is selected on the mode selection screen 105A in FIG. 2C. That is, in the FAX priority mode, the size of the area 115c for FAX is changed from 32 MB in the standard setting mode to 30 MB. Also, the sizes of the printing area 115a, the copying area 115b, and the scanner area 115d are changed from 32 MB in the standard setting mode to 24 MB, respectively. As a result, the size occupied by the areas 115a to 115d is reduced from 128 MB to 102 MB, resulting in a free area 115 f of 26 MB. In this case, as described above, when the system control unit 121 starts up or restarts the MFP 100 from the power-off state, the memory management unit 118 uses the free space 115 f as an application for adding or extending a function to the memory management unit 118. It is instructed to assign to the area 115e.

  FIG. 4B shows the allocation of memory areas when the scanner priority mode in the selection field 105e is selected on the mode selection screen 105A of FIG. 2C. That is, in the scanner priority mode, the size of the scanner area 115d is changed from 32 MB to 30 MB in the standard setting mode. The sizes of the printing area 115a, the copying area 115b, and the fax area 115c are changed from 32 MB to 24 MB in the standard setting mode. As a result, the size occupied by the areas 115a to 115d is reduced from 128 MB to 102 MB, resulting in a free area 115 f of 26 MB. In this case, as described above, when the system control unit 121 starts up or restarts the MFP 100 from the power-off state, the memory management unit 118 uses the free space 115 f as an application for adding or extending a function to the memory management unit 118. It is instructed to assign to the area 115e.

  FIG. 4C shows allocation of memory areas when the user setting mode of the selection field 105f is selected on the mode selection screen 105A of FIG. 2C. That is, in the user setting mode, the sizes of the printing area 115a, the copying area 115b, the FAX area 115c, and the scanner area 115d can be arbitrarily changed. However, in this case, the overall size of the areas 115a to 115d is changed so as to be reduced relative to the overall size of the areas 115a to 115d in the standard setting mode. As described above, the size occupied by the areas 115a to 115d is changed from 128 MB in the standard setting mode to x × 4 MB, to generate a free area 115f of yMB. In this case, as described above, when the system control unit 121 starts up or restarts the MFP 100 from the power-off state, the memory management unit 118 uses the free space 115 f as an application for adding or extending a function to the memory management unit 118. It is instructed to assign to the area 115e.

  If any of the print function, the copy function, the fax function, and the scanner function is disabled due to any cause, the system control unit 121 may open the areas 115a to 115d corresponding to the disabled function. . Further, the system control unit 121 may instruct the memory management unit 118 to assign the opened areas 115a to 115d to the application area 115e for adding or extending a function.

  Next, with reference to FIG. 5, allocation processing of the areas 115 a to 115 e of the RAM 115 will be described. In the following description, it is assumed that the print priority mode selection field 105b is selected from the mode selection screen 105A. Also, allocation of the areas 115 a to 115 e of the RAM 115 will be described as being performed when the MFP 100 is restarted.

(Step S101)
The system control unit 121 determines whether the display of the mode selection screen 105A is instructed.
In this case, if there is no notification indicating that the instruction to display mode selection screen 105A from panel operation control portion 119 via panel unit 105 has been received, system control portion 121 instructs display of mode selection screen 105A. It is judged that it is not done (Step S101: No).
On the other hand, if there is a notification indicating that the instruction for displaying mode selection screen 105A from panel operation control portion 119 via panel unit 105 has been received, system control portion 121 displays mode selection screen 105A. Is determined (step S101: Yes), and the process proceeds to step S102.
At this time, the system control unit 121 instructs the panel operation control unit 119 to display the mode selection screen 105A on the panel unit 105.

(Step S102)
The system control unit 121 determines whether a mode is selected.
In this case, the system control unit 121 determines that the mode is not selected if there is no notification from the panel operation control unit 119 via the panel unit 105 indicating that the print priority mode selection field 105 b is selected (step S102: No), the process proceeds to step S106. The system control unit 121 waits for a predetermined time (for example, 15 seconds) to elapse after the mode selection screen 105A is displayed on the panel unit 105, and the panel unit 105 from the panel operation control unit 119 is within this fixed time. If there is no notification indicating that the print priority mode selection field 105b has been selected, the process may proceed to step S106.
On the other hand, if there is a notification from the panel operation control unit 119 indicating that the print priority mode selection field 105 b has been selected via the panel unit 105, the system control unit 121 determines that the mode is selected. (Step S102: Yes), it transfers to step S103.

(Step S103)
The system control unit 121 stores the selected mode.
In this case, the system control unit 121 stores, for example, the selected print priority mode in the EEPROM 116.

(Step S104)
The system control unit 121 determines whether a restart has been instructed.
In this case, the system control unit 121 determines that a restart instruction is not given if there is no notification indicating that the restart instruction has been received from the panel operation control unit 119 via the panel unit 105 (step S104: No). .
On the other hand, if there is a notification indicating that the restart instruction has been received from panel operation control unit 119 via panel unit 105, system control unit 121 determines that the restart instruction has been issued (step S104: Yes), shift to step S105.

(Step S105)
The system control unit 121 executes a restart process.
In this case, system control unit 121 executes, for example, a start-up sequence or the like stored in EEPROM 116.

(Step S106)
The system control unit 121 determines whether there is a change in mode.
In this case, if, for example, the print priority mode selected in step S102 is not stored in the EEPROM 116, the system control unit 121 determines that there is no mode change (step S106: No), and proceeds to step S108.
On the other hand, if the print priority mode selected in step S102 is stored in, for example, EEPROM 116, system control unit 121 determines that there is a mode change (step S106: Yes), and proceeds to step S107. .

(Step S107)
The system control unit 121 instructs assignment in the selected mode.
In this case, the system control unit 121 instructs the memory management unit 118 to allocate a memory area in the selected print priority mode.
At this time, as illustrated in FIG. 3B, the memory management unit 118 changes the size of the printing area 115a to 30 MB. Also, the size of the copy area 115b, the fax area 115c, and the scanner area 115d is changed to 24 MB. As a result, the size occupied by the areas 115a to 115d is reduced from 128 MB in the standard setting mode to 102 MB, and a vacant area 115 f of 26 MB is generated. In addition, the system control unit 121 instructs the memory management unit 118 to allocate the free space 115 f to the area 115 e by instructing 26 MB of the free space 115 f to be allocated to the application area 115 e for adding or extending a function. .

(Step S108)
The system control unit 121 instructs assignment in the previous mode.
In this case, the system control unit 121 instructs the memory management unit 118 to allocate a memory area in the mode before restarting.
At this time, when the mode before restart is, for example, the copy priority mode shown in FIG. 3C, the system control unit 121 instructs the memory management unit 118 to allocate a memory area in the copy priority mode. Do.
At this time, as shown in FIG. 3C, in the copy priority mode, the memory management unit 118 allocates the size of the copy area 115b to 30 MB. Also, the sizes of the printing area 115a, the fax area 115c, and the scanner area 115d are allocated to 24 MB. In this case, by changing the size occupied by the areas 115a to 115d from 128 MB to 102 MB in the standard setting mode, a vacant area 115f of 26 MB is generated. In addition, the system control unit 121 instructs the memory management unit 118 to allocate the free space 115 f to the area 115 e by instructing 26 MB of the free space 115 f to be allocated to the application area 115 e for adding or extending a function. .

  As described above, in the present embodiment, the memory management unit 118 causes the RAM 115 (volatile memory) to be different from the application area 115e (first area) for adding or extending a function. Areas 115a to 115d (second areas) are allocated, and panel selection section 105 displays mode selection screen 105A in which the reduction width of the size of areas 115a to 115d (second areas) is changed, and system control section 121 The memory management unit 118 is instructed to allocate a memory area based on the mode selected on the mode selection screen 105A. In addition, the system control unit 121 determines the free space 115 f of the areas 115 a to 115 d (second area) in the selected mode, and the free space 115 f is an area 115 e (first area) for the memory management unit 118. Assign to

  As a result, since the free area 115f of the areas 115a to 115d (second area) can be added to the application area 115e (first area) for adding or expanding a function, a memory area associated with the execution of the application Pressure can be avoided, and abnormalities such as performance deterioration and malfunction can be prevented.

  In the present embodiment, the electronic device is assumed to be the MFP 100. However, the present invention is not limited to this example, and may be applied to other electronic devices such as a multifunction printer and a PC (Personal Computer).

100 MFP
101 scanner unit 102 printer unit 103 fax unit 104 I / F
105 panel unit 106 HDD
105A mode selection screen 105a to 105g selection field 110 control unit 111 scanner control unit 112 printer control unit 113 FAX control unit 114 communication control unit 115 RAM
116 EEPROM
115a to 115e Area 117 Image Processing Unit 118 Memory Management Unit 119 Panel Operation Control Unit 120 HDD Control Unit 121 System Control Unit 122 Data Bus

Claims (4)

A memory management unit that allocates, to volatile memory, a first area for an application for adding or expanding a function and a second area for different functions;
A panel unit that displays a mode selection screen in which the reduction width of the size of the second area is changed;
A system control unit for instructing the memory management unit to allocate a memory area based on the mode selected on the mode selection screen;
The system control unit determines an empty area of the second area in the selected mode, and causes the memory management unit to allocate the empty area to the first area. .   The electronic device according to claim 1, wherein the reduction width of the size of the second area is different for each of the functions.   The system control unit causes the memory management unit to allocate the area allocated for the disabled function to the first area when the use by any of the functions is disabled. The electronic device according to claim 1 or 2, characterized in that: A memory area allocation program to be executed by a computer that controls allocation of an area of volatile memory of an electronic device, comprising:
Assigning a first area for application for function addition or expansion and a second area for different functions to the volatile memory by the memory management unit;
Displaying a mode selection screen in which the reduction width of the size of the second area is changed by the panel unit;
Causing the system control unit to execute the step of instructing the memory management unit to allocate a memory area based on the mode selected on the mode selection screen,
The system control unit determines a free area of the second area in the selected mode, and causes the memory management unit to allocate the free area to the first area. Allocation program.

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