JP4232718B2 - Scientific calculator - Google Patents

Description

  The present invention relates to a scientific calculator having an inspection function.

  2. Description of the Related Art Conventionally, a calculator (electronic desk calculator) is known as a kind of display control device, which executes a calculation based on an input mathematical expression and displays a calculation result when various mathematical expressions are input. Various types of semiconductor circuits are built in the calculator, and a display device that displays input numerical values, arithmetic expressions, calculation results, and the like is generally provided.

An apparatus for inspecting whether or not a semiconductor circuit is operating correctly is known (for example, see Patent Document 1). By providing such a device in a calculator, for example, a function for inspecting whether a semiconductor circuit incorporated in the calculator is normal or abnormal (hereinafter referred to as “self-inspection function” as appropriate) may be installed. it can.
JP-A-6-342040

  Here, in a manufacturing process of a calculator or the like, it is common that an inspector performs a final inspection of a product. For example, a method is adopted in which an inspector executes a self-inspection function built in a calculator, and the quality of each product is judged by visually checking the execution result.

  Here, many of the result display screens of the self-inspection function are monotonous display screens. For inspectors who check a large number of products in factories and the like, it is necessary to inspect with a certain degree of tension so as not to mistake the monotonous result display screen, which is a heavy burden.

  Therefore, in view of the above problems, an object of the present invention is to realize display of inspection results with high visibility.

In order to solve the above problems, a scientific calculator according to the present invention is a scientific calculator comprising a key input unit, a display unit, an arithmetic processing program of a scientific calculator, and a program memory storing a self-inspection program, Detection means for detecting a predetermined operation using a plurality of keys of the key input unit, and a display unit check and a program memory check to be inspected by a self-inspection program stored in the program memory in response to detection by the detection unit An inspection process list display means for displaying a list of inspection processes to be included, a selection means for selecting an inspection process to be executed from the inspection processes displayed by the list display means, and a result of the inspection by the inspection means , including the display position Refer to the symbol mark display setting data storing the display mode data, and the predetermined symbol mark differs depending on the inspection process Characterized by comprising a test result display means for displaying in a manner of displaying the location, the.

According to the present invention, the scientific calculator, when detecting a predetermined operation using a plurality of keys of the key input unit, performs an inspection process including a display unit check and a program memory check that are inspected by a self-inspection program stored in the program memory. When the inspection process to be executed is selected from the inspection processes displayed in the list, the selected inspection process is executed, and the inspection result is displayed in a predetermined display mode by the inspection process. Thus, the status of the self-inspection process is clearly notified.

  Next, an embodiment when the present invention is applied to a scientific calculator which is a kind of display control device will be described in detail with reference to the drawings. It should be noted that what can be applied to the present invention is not limited to a scientific calculator, but may be applied to a calculator that mainly handles four arithmetic operations, a financial calculator that incorporates a financial calculation function, and the like. .

[1. Constitution]
[1.1 Overall configuration]
FIG. 1 shows an overview of the scientific calculator 1. As shown in FIG. 1, the scientific calculator 1 includes a display 3, various key groups 5, and a reset switch 7. Here, unique functions are assigned to the keys constituting the various key groups 5, and the scientific calculator 1 is operated by pressing these keys by the user.

  The display 3 is a part where various data, mathematical expressions, and calculation results necessary for using the scientific calculator 1 such as mathematical expressions and characters in response to pressing of various keys are displayed. Here, the display 3 is described as a dot matrix type liquid crystal display device (LCD), but may be a segment type liquid crystal display device or the like.

  The various key group 5 is a key group for inputting a mathematical expression composed of a numerical value, a calculation symbol, or the like to the scientific calculator 1 or instructing processing. The various key groups 5 include, for example, a menu key 5a, a shift key 5b, an AC key 5c, a numeric key group 5d, an arithmetic operation key group 5e, and an execution key 5f.

  The menu key 5a is a key for calling a menu for executing each calculation function in the scientific calculator 1, and the shift key 5b is a key used when pressed in combination with other keys. For example, when the AC key 5c is pressed, the power source of the scientific calculator 1 is turned on. By pressing the shift key 5b and the AC key 5c in combination, the power source of the scientific calculator 1 is turned off. The numeric key group 5d is a key for inputting a numerical value to the scientific calculator 1. The four arithmetic operation key group 5e is a key for inputting an operator for executing the four arithmetic operations.

  The execution key 5f is a key for instructing the scientific calculator 1 to execute and determine the process. In addition, when the user inputs an arithmetic expression and then presses the execution key 5f, the arithmetic expression is executed, and the execution result is displayed on the display 3.

  The reset switch 7 is a device for performing a so-called reset operation for erasing the contents stored in the RAM of the scientific calculator 1. Although details will be described later, when the reset switch 7 is pressed by the user, the CPU 10 executes a reset process in accordance with a reset program 218 stored in the ROM 20.

  FIG. 2 is a block diagram showing the configuration of the scientific calculator 1. As shown in the figure, the scientific calculator 1 includes a CPU (Central Processing Unit) 10, a ROM (Read Only Memory) 20, a RAM (Random Access Memory) 30, an input unit 40, and a display unit 50. The parts are connected by a bus 60.

[1.2 ROM and RAM]
The ROM 20 stores various programs related to the operation of the scientific calculator 1, such as menu display processing, various setting processes, various arithmetic processing, and the like, programs for realizing various functions provided in the scientific calculator 1, and symbol mark display. Setting data 204, a self-inspection program 210, and a calculation program 220 are stored. Also, an LCD inspection program 212, a ROM inspection program 214, a RAM inspection program 216, and a reset program 218 are stored as subroutines of the self-inspection program 210.

  The symbol mark display setting data 204 is data that stores the setting of the display mode when displaying the symbol mark. As shown in FIG. 3, in the symbol mark display setting data 204, the display position (eg, “center”), size (eg, “3”), and the like are associated with the setting number (eg, “1”). Are stored in association with each other.

  The display position is a position where the symbol mark is displayed on the display unit 50. In practice, the position is specified using the coordinates of the display unit (for example, “5th horizontal dot, 3rd vertical dot”), but in the present embodiment, “ It is expressed as a relative position such as “center”, “upper right”, “lower right”, “upper left” and the like.

  The size represents the size of the symbol mark. Here, the size of the symbol is relatively shown when the scientific calculator 1 displays a numerical value or a mathematical expression. As another method for designating the size, for example, a method for designating a character point may be used.

  Further, the display setting of each symbol mark is used in a predetermined situation. Specifically, the symbol mark is displayed in the display mode of setting number “1” when the result of the inspection process is normal, and in the display mode of setting number “2” when the result of the inspection process is abnormal. Is done. When the user is prompted to confirm the inspection process, the symbol mark is displayed in the display mode of the setting number “3”. Further, at the start of the self-inspection process, the symbol mark is displayed in the display mode of the setting number “4”, and when the initialization of the memory is completed, the symbol mark is displayed in the display mode of the setting number “5”.

  Here, a case where the symbol mark is displayed according to the setting number “1” will be described. The CPU 10 displays a symbol mark “AAA” having a size “3” at the center position of the display unit 50. A diagram representing the symbol mark at this time is the symbol mark SM104 in FIG. Similarly, the symbol mark “AAA” displayed according to the setting number “2” is the symbol mark SM106 in FIG.

  The RAM 30 is a memory that can be written at any time to temporarily hold various programs executed by the CPU 10, data related to the execution of these programs, and the like. In the present embodiment, an area for the inspection flag storage area 302 is secured.

  The inspection flag storage area 302 is an area for storing the results of the inspection process of the ROM inspection process and the RAM inspection process. As shown in FIG. 4, the examination flag storage area 302 stores examination contents and flags in association with each other. Here, when the flag is “0”, it indicates that the result of the inspection process is normally completed, and when the flag is “1”, it indicates that the result of the inspection process is abnormal.

[1.3 CPU]
The CPU 10 executes processing based on a predetermined program in accordance with an input instruction, and transfers instructions and data to each function unit. Specifically, the CPU 10 reads a program stored in the ROM 20 in accordance with an operation signal input from the input unit 40, and executes processing according to the program. And CPU10 outputs the display control signal for displaying a process result to the display part 50 suitably, and displays corresponding display information.

  Further, the CPU 10 executes a self-inspection process (see FIGS. 5 and 6) according to the self-inspection program 210 stored in the ROM 20. Specifically, when the specific key is pressed, the CPU 10 displays an inspection start message and also displays a symbol mark according to the symbol mark display setting data. When all inspection processes are executed as a subroutine, an inspection result message is displayed and a symbol mark corresponding to the inspection result is also displayed.

  Further, the CPU 10 executes an LCD inspection process (see FIG. 7) according to the LCD inspection program 212 stored in the ROM 20. Specifically, after performing each inspection on the LCD, the CPU 10 displays a message indicating the completion of the inspection and also displays a symbol mark.

  Further, the CPU 10 executes a ROM inspection process (see FIG. 8) according to the ROM inspection program 214 stored in the ROM 20. Specifically, the CPU 10 checks whether the ROM is normal. Then, a message corresponding to the inspection result is displayed, and a symbol mark is also displayed. Here, various methods can be considered as a method for inspecting whether or not the ROM is normal. In this embodiment, a method for inspecting whether or not the ROM is normal by using the check SUM is used. .

  Further, the CPU 10 executes a RAM inspection process (see FIG. 9) according to the RAM inspection program 216 stored in the ROM 20. Specifically, the CPU 10 checks whether or not the RAM is normal. Then, a message corresponding to the inspection result is displayed, and a symbol mark is also displayed. Here, various methods can be considered as a method for checking whether or not the RAM is normal. In this embodiment, whether or not the test data is correctly read out by writing the test data into the storage area of the RAM. (Hereinafter referred to as “read / write inspection” as appropriate).

  Further, the CPU 10 executes a reset process (see FIG. 10) according to the reset program 218 stored in the ROM 20. Specifically, the CPU 10 initializes the contents stored in the RAM 30. Then, a message indicating that the reset process has been completed is displayed, and a symbol mark is also displayed.

  Further, the CPU 10 executes arithmetic processing according to the arithmetic program 220 stored in the ROM 20. Here, the calculation process is a process of executing a calculation based on a numerical value, an arithmetic expression, or the like input in the scientific calculator 1.

[1.4 Input / output section, etc.]
The input unit 40 is an input device including a key group necessary for inputting mathematical expressions such as numeric keys and calculation keys and selecting functions, and outputs a signal of a pressed key to the CPU 10. By means of key input in the input unit 40, input means such as input of mathematical expressions, selection of functions, and instructions for execution of calculations are realized.

  The display unit 50 displays various screens based on display signals input from the CPU 10. The display screen of the display unit 50 corresponds to the display 3 shown in FIG.

  The bus 60 is a line through which an electrical signal such as data from the CPU 10 passes, and is a signal line that connects the CPU 10, the ROM 20, the RAM 30, the input unit 40, and the display unit 50.

[2. Operation processing]
[2.1 Self-inspection process]
[2.1.1 Process flow]
Next, the operation of the scientific calculator 1 in the present embodiment will be described with reference to the drawings. 5 and 6 are flowcharts for explaining the operation of the scientific calculator 1 according to the self-inspection process. This self-inspection process is a process realized by the CPU 10 executing the self-inspection program 210 stored in the ROM 20.

  When the AC key 5c is pressed when the power of the scientific calculator 1 is OFF (step S10; Yes), the CPU 10 shifts the power to the ON state and determines whether the specific key is pressed. Determination is made (step S12). Here, the specific key refers to a combination of pressing operations of a plurality of predetermined keys other than the numeric keys in the key group 5, and in this embodiment, the menu key 5a, the shift key 5b, and the AC The key 5c is a specific key, and the CPU 10 determines whether or not these specific keys are simultaneously pressed. If the specific key has not been pressed, the CPU 10 executes a calculation process (step S12; No). In the present embodiment, it is determined whether or not the specific key is pressed simultaneously. However, it may be determined whether or not the specific key is pressed in a predetermined order. For example, the CPU 10 may determine whether or not the shift key 5b and the menu key 5a are sequentially pressed after the AC key 5a is pressed.

  When the specific key is pressed by the user (step S12; Yes), the CPU 10 initializes the flag in the inspection flag storage area 302 (step S14) and displays an inspection start message (step S16). Further, the CPU 10 displays the symbol mark according to the symbol mark display setting of the setting number “4” stored in the symbol mark display setting data 204 (step S18). Specifically, the symbol mark “AAA” is displayed on the upper left of the display unit 50 in a state of size “1”.

  Subsequently, when a predetermined time has elapsed (step S20; Yes), the CPU 10 displays a list of processes to be inspected (step S22). Here, when one process is selected from the inspection processes displayed in a list, the CPU 10 calls and executes a subroutine corresponding to the selected inspection process. Specifically, when the process 1 is selected, the LCD inspection process is performed (step S24; process 1 → step S26), and when the process 2 is selected, the ROM inspection process is performed (step S24; process 2 → step S26). S28) When the process 3 is selected, the RAM inspection process is performed (step S24; process 3 → step S30), and when the process 4 is selected, the reset process is performed (step S24; process 4 → step S31). Each is called and executed.

  When all the inspection processes are completed (step S32; Yes), the CPU 10 executes an inspection process end process (step S34). Note that the inspection processing end processing refers to processing for initializing a memory area used in ROM inspection, for example.

  Next, it is determined whether or not “1” is stored in the inspection flag stored in the inspection flag storage area 302 (step S36). If “1” is not stored in the inspection flag (step S36; Yes), the CPU 10 displays a message indicating that the inspection has been completed normally (step S38). Further, the CPU 10 displays a symbol mark according to the symbol mark display setting of the setting number “1” stored in the symbol mark display setting data 204 (step S40).

  On the other hand, if “1” is stored in any of the flags stored in the inspection flag storage area 302 (step S36; No), the CPU 10 indicates that the inspection has ended abnormally. Is displayed (step S42). Further, the symbol mark is displayed according to the symbol mark display setting of the setting number “2” stored in the symbol mark display setting data 204 (step S44).

  And CPU10 complete | finishes a self-inspection process, after fixed time passes (step S46; Yes).

[2.1.2 Operation example]
Next, an operation example of the scientific calculator 1 in the self-inspection process will be described with reference to the drawings. FIG. 11A shows an example of the display screen W100 after the specific key is pressed by the user. An inspection start message M100 is displayed on the display screen W100 (step S16 in FIG. 5). Further, the symbol mark SM100 is displayed according to the symbol mark display setting of the setting number “4” stored in the symbol mark display setting data 204 (step S18). Subsequently, when a certain period of time has elapsed, a list of inspection processes is displayed (step S22; display screen W102 in FIG. 11B).

  FIG. 11C shows an example of a display screen W104 that is displayed when “1” is not stored in any flag in the inspection flag storage area 302 after all the inspection processes are executed in the self-inspection process. FIG. On the display screen W104, a message M104 indicating that the examination is normal is displayed. Further, the symbol mark SM104 is displayed according to the symbol mark display setting of the setting number “1” stored in the symbol mark display setting data 204.

  FIG. 11D shows a display screen W106 displayed when “1” is stored in any of the flags in the inspection flag storage area 302 after all the inspection processes are executed in the self-inspection process. It is the figure which showed an example. On the display screen W106, a message M106 indicating that there is an abnormality in the examination is displayed. The symbol mark SM106 is displayed according to the symbol mark display setting of the setting number “2” stored in the symbol mark display setting data 204.

[2.1.3 Action and effect]
As described above, according to the self-inspection processing, each inspection processing is executed, and when the inspection processing result is normal, the symbol mark is displayed large in the center. In addition, when there is an abnormality in any of the inspection processes, a symbol mark is displayed on the upper right, which is smaller than that in the normal state. Therefore, since the display mode of the symbol mark changes according to the inspection result, the inspection result can be confirmed with high visibility.

[2.2 LCD inspection processing]
[2.2.1 Process flow]
Next, the LCD inspection process will be described. FIG. 7 is a flowchart for explaining the operation of the scientific calculator 1 according to the LCD inspection process. This LCD inspection process is a process realized by the CPU 10 executing the LCD inspection program 212 stored in the ROM 20, and is a process called as a subroutine in step S26 in the self-inspection process.

  CPU10 makes all the display dots which comprise LCD of the display part 50 a lighting state (step A10). After lighting for a predetermined time, the CPU 10 turns off all the display dots constituting the LCD (step A12). After turning off the light for a predetermined time, the frame is displayed on the LCD (step A14). Here, the frame display is a display in which a predetermined width (for example, “3” dots) from the end of the display dots constituting the LCD is turned on and the other part (center part) is turned off. is there.

  When the above-described processing ends, the CPU 10 displays an LCD inspection end message (step A16). Further, the CPU 10 displays the symbol mark according to the symbol mark display setting of the setting number “3” of the symbol mark display setting data 204 (step A18).

  Further, when a predetermined time has elapsed (step A20; Yes), the CPU 10 ends the LCD inspection process and returns the process to the self-inspection process.

[2.2.2 Operation example]
Next, an operation example of the scientific calculator 1 in the LCD inspection process will be described with reference to the drawings.

  FIGS. 12A to 12C show an example of a display screen showing a state in which the LCD inspection is being executed. The state in which all display dots constituting the LCD are turned on (step A10) is the display screen W200 of FIG. 12A, and the state in which all display dots constituting the LCD are turned off (step A12) is FIG. The display screen W202 of FIG. 12 (c) is a display screen W202 in which the LCD is framed (step A14). By visually recognizing these display screens, it is determined whether or not the LCD is normal.

  FIG. 12D is a diagram showing an example of a display screen W206 displayed when the LCD inspection process is completed. Display screen W206 displays message M206 indicating that the LCD inspection has been completed, and symbol mark SM206 displayed according to the symbol mark display setting of setting number “3” in symbol mark display setting data 204. Here, as for the symbol mark SM206, the symbol mark “AAA” is displayed with a size “2” in the lower right of the display screen W106.

[2.2.3 Action and effect]
As described above, according to the LCD inspection process, when the inspection of the LCD is finished, the symbol mark is displayed on the lower right. Therefore, it is possible to grasp at a glance that the inspection of the LCD is completed by visually recognizing the symbol mark. Furthermore, from the display mode of the symbol mark, it can be recognized at a glance that the user himself / herself needs to confirm whether the inspection result is normal or abnormal in the LCD inspection process.

[2.3 ROM inspection processing]
[2.3.1 Process flow]
Next, the ROM inspection process will be described. FIG. 8 is a flowchart for explaining the operation of the scientific calculator 1 according to the ROM inspection process. This ROM inspection process is a process realized by the CPU 10 executing the ROM inspection program 214 stored in the ROM 20, and is a process called as a subroutine in step S28 in the self-inspection process.

  First, the CPU 10 confirms the check SUM in the ROM 20 (step B10). Specifically, a check SUM calculated based on data stored in the ROM 20 is compared with a normal ROM check SUM stored in advance.

  If the check SUM of the inspected ROM 20 matches the normal value (step B12; Yes), a message indicating that the inspection result is normal is displayed (step B14). Further, the CPU 10 displays a symbol mark according to the symbol mark display setting of the setting number “1” stored in the symbol mark display setting data 204 (step B16).

  On the other hand, if the check SUM of the inspected ROM does not match the normal value (step B12; No), a message indicating that the result of the inspection is abnormal is displayed (step B18). Further, the CPU 10 sets the ROM inspection flag in the inspection flag storage area 302 to “1” (step B20). Further, the CPU 10 displays the symbol mark according to the symbol mark display setting of the setting number “2” stored in the symbol mark display setting data 204 (step B22).

  Then, when the predetermined time has elapsed (step B24; Yes), the CPU 10 ends the ROM inspection process and shifts the process to the self-inspection process.

[2.3.2 Operation example]
Next, an operation example of the scientific calculator 1 in the ROM inspection process will be described with reference to the drawings. FIG. 13A is a diagram showing an example of a display screen W300 displayed when the inspection result is normal in the ROM inspection process. The display screen W300 displays a message M300 indicating that the inspection has been completed normally, and a symbol mark SM300 according to the symbol mark display setting of the setting number “1” of the symbol mark display setting data 204 (FIG. 8 steps B14 and B16). Here, the symbol mark SM300 is displayed as a size “3” in the center of the display screen W300.

  FIG. 13B is a diagram showing an example of a display screen W302 displayed when the inspection result is abnormal in the ROM inspection process. The display screen W302 displays a message M302 indicating that there is an abnormality in the examination, and a symbol mark SM302 according to the symbol mark display setting of the setting number “2” of the symbol mark display setting data 204 ( Steps B18 and B22 in FIG. 8). Here, the symbol mark SM302 is displayed as a size “1” in the upper right of the display screen W302.

[2.3.3 Functions and effects]
As described above, according to the ROM inspection process, when the result of the ROM inspection is normal, the symbol mark is displayed large in the center. In addition, when the result of the ROM inspection is abnormal, it is displayed in the upper right, which is smaller than that in the normal state. Therefore, since the display mode of the symbol mark is different depending on whether it is normal or abnormal, the inspection result is displayed with high visibility.

[2.4 RAM inspection processing]
[2.4.1 Process flow]
Next, the RAM inspection process will be described. FIG. 9 is a flowchart for explaining the operation of the scientific calculator 1 according to the RAM inspection process. This RAM inspection process is a process realized by the CPU 10 executing the RAM inspection program 216 stored in the ROM 20, and is a process called as a subroutine in step S30 in the self-inspection process.

  First, the CPU 10 performs a read / write inspection on the RAM 30 (step C10). Here, when the read / write inspection is executed and it is determined that there is no abnormality in the RAM (step C12; Yes), a message indicating that the inspection result is normal is displayed (step C14). Further, the CPU 10 displays a symbol mark according to the symbol mark display setting of the setting number “1” stored in the symbol mark display setting data 204 (step C16).

  On the other hand, when the read / write inspection is executed and it is determined that the RAM is abnormal (step C12; No), a message indicating that the inspection result is abnormal is displayed (step C18). Further, the CPU 10 sets the RAM inspection flag in the inspection flag storage area 302 to “1” (step C20). Further, the CPU 10 displays the symbol mark according to the symbol mark display setting of the setting number “2” stored in the symbol mark display setting data 204 (step C22).

  Then, when the predetermined time has elapsed (step B24; Yes), the CPU 10 ends the RAM inspection process and shifts the process to the self-inspection process.

[2.4.2 Example of operation]
Next, an operation example of the scientific calculator 1 in the RAM inspection process will be described with reference to the drawings. FIG. 14A is a diagram showing an example of a display screen W400 displayed when the inspection result is normal in the RAM inspection process. The display screen W400 displays a message M400 indicating that the inspection has been completed normally, and a symbol mark SM400 according to the symbol mark display setting of the setting number “1” of the symbol mark display setting data 204 (FIG. 9 steps C14 and C16). Here, as for the symbol mark SM400, “AAA” is displayed as a size “3” in the center of the display screen W400.

  FIG. 14B is a diagram illustrating an example of a display screen W402 displayed when the inspection result is abnormal in the RAM inspection process. The display screen W402 displays a message M402 indicating that there is an abnormality in the inspection, and a symbol mark SM402 according to the symbol mark display setting of the setting number “2” of the symbol mark display setting data 204 (FIG. 8 steps C18, C22). Here, as for the symbol mark SM402, “AAA” is displayed as a size “1” in the upper right of the display screen W400.

[2.4.3 Action and effect]
As described above, according to the RAM inspection process, when the result of the RAM inspection is normal, the symbol mark is displayed large in the center. If the result of the RAM inspection is abnormal, a symbol mark is displayed at the right end, which is smaller than normal. Therefore, since the display mode differs between when it is normal and when it is abnormal, display of the inspection result with high visibility is realized.

[2.5 Reset processing]
[2.5.1 Process flow]
Next, the reset process will be described. FIG. 10 is a flowchart for explaining the operation of the scientific calculator 1 according to the reset process. This reset process is a process realized by the CPU 10 executing the reset program 218 stored in the ROM 20, and is a process called as a subroutine in step S31 in the self-inspection process. If the reset switch 7 is pressed by the user while the scientific calculator 1 is executing each process, the reset process is called and executed as an interrupt process.

  First, the CPU 10 initializes the contents stored in the RAM 30 (step D10). When the initialization is completed, a message indicating that the initialization is complete is displayed (step CD12). Further, the CPU 10 displays the symbol mark according to the symbol mark display setting of the setting number “5” stored in the symbol mark display setting data 204 (step D14).

  Then, when a predetermined time has elapsed (step D16; Yes), the CPU 10 ends the reset process and proceeds to a self-inspection process.

[2.5.2 Example of operation]
Next, an operation example of the scientific calculator 1 in the reset process will be described with reference to the drawings. FIG. 15 is a diagram showing an example of a display screen W450 displayed when initialization is completed in the reset process. In a state where the menu of the test mode is displayed as a list (display screen W102 in FIG. 11B), the reset process is executed by selecting the process item “4”.

  Display screen W450 displays message M450 indicating that initialization has been completed, and symbol mark SM450 according to the symbol mark display setting of setting number “5” of symbol mark display setting data 204 (FIG. 10). Steps D12 and D14). Here, as for the symbol mark SM450, “AAA” is displayed as a size “2” in the lower left of the display screen W450.

  Although the case where the reset process is selected from the menu list display in the test mode has been described here, for example, the same applies to the case where the reset switch 7 of the scientific calculator 1 is pressed during execution of another process. When the reset switch 7 is pressed by the user, the CPU 10 calls and executes the reset process as an interrupt process. When the initialization of the RAM 30 is completed, the display screen W450 of FIG. 15 is displayed.

[2.5.3 Actions and effects]
As described above, according to the reset process, when the contents stored in the RAM 30 are initialized, the symbol mark is displayed at the lower left of the screen. Therefore, it is possible to grasp at a glance that the reset process has been completed by visually recognizing the symbol mark.

[3. Modified example]
In the above-described embodiment, a scientific calculator has been described as an example of application of the display control device. However, the present invention is not limited to a scientific calculator, and is not limited to a scientific calculator. Of course, the present invention may be applied. Specifically, the present invention is applicable to any electronic device as long as it is in an environment where various data programs in the ROM 20 of FIG. 2 can be stored and executed.

  Further, in the above-described embodiment, the display form of the symbol mark of the same form is changed and displayed, but the symbol mark of a different form may be displayed. For example, in the ROM inspection process, an example of the display screen W500 when the ROM inspection result is normal is shown in FIG. 16A, and an example of the display screen W502 when there is an abnormality is shown in FIG. The display screen W500 displays a symbol mark SM500 “AAA” indicating that the inspection result is normal. On the other hand, the display screen W502 displays a symbol mark SM502 “ABC” indicating that the inspection result is abnormal. Thus, by changing the form of the symbol mark according to the inspection result, the visibility when identifying the inspection result is further improved.

  In the above-described embodiment, the character is used as the predetermined symbol mark. However, it is needless to say that the logo may have a character motif or may have a predetermined character design.

  Further, in the above-described embodiment, the predetermined symbol mark is described as a still image, but animation display or the like may be performed. For example, as shown in FIG. 16C, when the inspection result is normal, the symbol mark SM504 is displayed as an animation. Here, after the character CH1 “A” is displayed, the character CH2 “A” is displayed, and then the character CH3 “A” is displayed. Thus, visibility is further improved by using the animation display.

Overview of the scientific calculator. Block diagram of scientific calculator. The figure which shows an example of a data structure of symbol mark display setting data. The figure which shows an example of a data structure of the inspection flag storage area 302. The figure which shows the operation | movement flow of a self-inspection process. The figure which shows the operation | movement flow of a self-inspection process. The figure which shows the operation | movement flow of a LCD test | inspection process. The figure which shows the operation | movement flow of ROM inspection processing. The figure which shows the operation | movement flow of RAM test | inspection processing. The figure which shows the operation | movement flow of a reset process. The figure explaining the operation example of a self-inspection process. The figure explaining the operation example of LCD test | inspection process. The figure explaining the operation example of ROM test | inspection process. The figure explaining the operation example of RAM test | inspection process. The figure explaining the operation example of a reset process. The figure explaining the operation example in a modification.

Explanation of symbols

1 Scientific calculator 10 CPU
20 ROM
204 Symbol mark display setting data 210 Self-inspection program 212 LCD inspection program 214 ROM inspection program 216 RAM inspection program 218 Reset program 220 Operation program 30 RAM
32 Inspection flag storage area 40 Input unit 50 Output unit 60 Bus

Claims (3)

A scientific calculator comprising a key input unit, a display unit, a scientific calculator operation processing program, and a program memory storing a self-inspection program,
Detecting means for detecting a predetermined operation using a plurality of keys of the key input unit;
In response to detection by the detection means, an inspection process list display means for displaying a list of inspection processes including a display unit check and a program memory check to be inspected by a self-inspection program stored in the program memory;
A selection means for selecting an inspection process to be executed from the inspection processes displayed by the list display means;
Inspection means for executing the inspection process selected by the selection means;
Inspection result display for displaying the result of the inspection by the inspection means with reference to the symbol mark display setting data storing the display mode data including the display position in a mode in which a predetermined symbol mark is displayed at a different position according to the inspection process Means,
A scientific calculator characterized by comprising.   The scientific calculator according to claim 1, wherein the display unit check is performed by sequentially displaying a plurality of patterns on the display unit.   2. The scientific calculator according to claim 1, wherein the program memory check is checked by checking a checksum.