JPS6115466B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a modifier key input display method in a small electronic calculator with a program. For small electronic calculators with programs, 1
A model with a one-step program data storage system has been developed. That is, for example, if a key operation

【formula】

[Formula] and two operations are actually used to perform one function of sin ^-1 , and this is treated as one step.
By the way, such modifier keys such as "arc" are not used when writing programs.

【formula】

It is common for the corresponding symbols and numbers to be displayed for the first time by operating [Formula]. However, with this display method, it is difficult to determine whether or not a modifier key has actually been input, leading to more operational errors.Furthermore, if a modifier key is misoperated, correct data cannot be entered at the relevant step. To do this, the incorrect data has already been written when it is displayed, so
The program counter must be moved back one step and the correct data must be written from the beginning.
There were drawbacks such as complicated operations. The present invention has been made in view of the above points, and when inputting program data, it is displayed when a modifier key is operated, and furthermore, when all the relevant steps are inputted by keys, the program data is displayed internally. It is an object of the present invention to provide a modifier key input display method that can also display that it has been loaded into memory. An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows an external view of a small electronic calculator with a program, in which a keyboard 2, a data display window 3, a power switch 4, and a mode designation switch 5 are provided on the top surface of a case 1. On the keyboard 2, various function keys are arranged along with a numeric keypad, and a symbol indicating the function is written on the top of each key, and a key code is written on the board located below each key. has been written. for example

[Expression] "99" for the key,

[Expression] "95" for the key,

A code such as "82" is written for the [Formula] key. Next, the circuit configuration will be explained with reference to FIG.
In FIG. 2, reference numeral 11 denotes a key input section including the keyboard 2, and key input data from this key input section 2 is sent to a key code generation section 12. Further, a key presence signal outputted from the key input section 11 when a key is operated is sent to the control section 13. Further, a modifier key signal outputted from the key input section 11 when a modifier key is operated is sent to a key data holding circuit 14 that stores the contents of the previous and current operated keys. This key data holding circuit 14 consists of first and second latch circuits 15, 16, AND circuits 17, 18,
A modifier key signal from the key input section 11 is input to the first latch circuit 15 . This first latch circuit 15
is for storing and holding input data in synchronization with the timing signal a from the control section 13, and its output is input to the AND circuit 17. Further, the second latch circuit 16 stores and holds a signal indicating whether the last operated key is a modifier key given from the control unit 13 in synchronization with the timing signal d, and its output is input to the AND circuit 18. be done. The gate of the AND circuit 17 is opened by the timing signal c from the control section 13, and the gate of the AND circuit 18 is opened by the timing signal b from the control section 13, and their outputs are sent to the control section 13. The key code generation section 12 generates a key code according to the key input data from the key input section 11, and the output code is stored in the RAM.
(Random access memory) 19. The RAM 19 is composed of various operation registers such as an X register 19-1 and a Y register 19-2, and the control unit 13 selects the registers and specifies reading, writing, etc.
The data stored in the RAM 19 is sent to an arithmetic unit (ALU) 20 for calculation, and the result of the calculation is written to the RAM 19 again. The operation of the arithmetic circuit 20 is controlled according to instructions from the control section 13. Also, the X register 16-1 in RAM 19
also serves as a display register, and its stored contents are sent to the display drive circuit 21 and displayed on the display section 22. Furthermore, the data stored in the RAM 19 is converted into a 1-byte code via the code converter 23 and sent to the external RAM 24. this external
The RAM 24 is used to store programs, and its output data is inversely converted from a 1-byte code to the original program data entered by key via the inverse code converter 25 and sent to the RAM 19. The external RAM 24 above is the program counter 2.
The address is specified by 6. The contents of this program counter 26 are sequentially counted up by a +1 circuit 27. The +1 circuit 27 increments the contents of the program counter 26 by 1 in response to the +1 signal from the control section 13, and upon advancing to the final address, generates a carry signal by the next +1 and inputs it to the control section 13. Furthermore, the read and read modes of the external RAM 24 are designated by read/write signals from the control section 13. FIG. 3 shows the data storage state of the X register 19-1 and Y register 19-2 in the RAM 19. Both the X register 19-1 and the Y register 19-2 have a 14-digit configuration, and when inputting program data, the 0 digit in the X register 19-1 corresponds to decimal point data Xp, and the 1st to 3rd digits correspond to the external RAM 24. Program contents are written in the 4th to 13th digits of the program step. Further, in the Y register 19-2, a mode flag is written in the 0th digit, and an operation key code is written in the 4th and 5th digits. Next, the operation of the present invention configured as described above will be explained according to the flowchart of FIG. When the mode designation switch 5 is switched to the write mode (WRITE) when writing a program, the
As shown in the figure, "1" indicating the write mode is written to the 0 digit of the Y register 19-2. In the initial state, the content of the program counter 26 is "000". Therefore, as shown in FIG. 5a, the contents of the first to third digits of the X register 19-1 are "000", and the display for the program step at that time is also "000". If you write a program using key operations from this state,
As the program counter 26 is sequentially counted up, program data is sequentially written into the external RAM 24 addressed by the program counter 26. FIG. 5b shows the state when the program setting has progressed to 100 steps and the content of the program counter 26 becomes "100". At this time, "100" is written in the 1st to 3rd digits of the X register 19-1, and the program step on the display section 22 is "100". However, in the above state, if a key operation is performed, the fourth
Key input display processing is started according to the flowchart shown in the figure. In the key input section 11, for example, as shown in FIG. 5c, there is a modifier key.

[Formula] When the key is operated, a key presence signal is sent from the key input section 11 to the control section 13,
As a result, the timing signal a is output from the control section 13 and the modifier key signal is set in the first latch circuit 15. Also, from the key code generation unit 12

[Formula] The code "99" for the key is output and the Y register 19-2 is set as shown in Figure 5c.
Written to 4.5 digits Y ₄ and Y ₅ . And first, the fourth
As shown in step _S1 in the figure, it is determined whether a modifier key was previously operated. This is because if the modifier key was operated last time, "1" was written from the control section 13 to the second latch circuit 16, so the timing signal b is output from the control section 13 and the second latch circuit 16 is activated. The determination is made by reading the contents to the control unit 13 via the AND circuit 18. In this case, it is determined in this step _S1 that the modifier key was not operated last time, and the process proceeds to step _S2 , where the decimal point data in the 0th digit of the X register 19-1 is stored.
Clear Xp. This decimal point is designed to be displayed when all data for one step has been input. Then, in step _S3 , X register 1
Add +1 to the 1st to 3rd digits of 9-1. That is,
Since the previous program step is written in the 1st to 3rd digits of the X register 19-1, adding +1 advances the displayed program step to the next one. Thereafter, the process proceeds to step _S4 , and the blanking code BL is input into the 4th to 13th digits _X4 to _X13 of the X register 19-1. If the above step _S4 is completed or YES in step _S1 , that is, it is determined that the modifier key was operated last time, the process proceeds to step _S5 , and the 4th to 8th digits X of the X register 19-1 are entered. ₄ ~X Increase the contents of ₈ by 3 digits to 7 ~ 11
Transfer to digits X ₇ to X ₁₁ . In this case, at this point, no key code has been written in the 4th to 8th digits X ₄ to X ₈ of the X register 19-1. Next, proceed to step S ₆ and read the 4th and 5th digits of Y register 19-2.
X the key code “99” written in Y ₄ and Y ₅
Transfer to 4th and 5th digits X ₄ and X ₅ of register 19-1. Then, by the carry process in step _S5 above,
Since the contents of the 6 digits x ₆ of the register 19-1 are "0", the blanking code BL is input into the 6 digits x ₆ in step _S7 . Next, the process proceeds to step _S8 , where the control unit 13 supplies the timing signal c to the AND circuit 17 to read the content of the first latch circuit 15, and determines whether the content is "1" or not, that is, whether the current operation key is Determine whether it is a modifier key. In this case, the judgment result is YES with the modifier key,
Proceeding to step _S9 , the second latch circuit 16 is set. After that, proceed to step _S14 and register X register 1.
The contents of 9-1 are sent to the display drive circuit 21 and displayed on the display section 22 as shown in FIG. 5c. Next, as shown in Figure 5d, the modifier key, for example,

If you operate the [Expression] key, this

[Formula] The code "95" for the key is output from the key code generator 12, and the Y register 19-
It is written in the 4th and 5th digits Y ₄ and Y ₅ of 2. Then, in step _S1 , it is determined whether the content of the second latch circuit 16 is "1". At this point, the second latch circuit 16 has been set to "1" in the previous step _S9 , so the determination result in step _S1 is YES.
Then, proceed to step _S5 and register X register 19-1.
The content "99" in the 4th and 5th digits X ₄ and X ₅ is moved up by 3 digits and moved to the 7th and 8th digits X ₇ and X ₈ . After that, in step _S6 , the 4th and 5th digits Y ₄ of the Y register 19-2,
The content "95" in Y ₅ is 4,5 of X register 19-1
Transferred to digits X ₄ and X ₅ . Thereafter, in the same manner as in the previous key operation, the process proceeds to step _S14 via steps _S7 and _S9 , and the contents of the X register 19-1 are displayed. The display at this time shows that key codes "99" and "95" have been operated and that the program step at this time is "101", as shown in FIG. 5d. Next, as shown in FIG.

[Formula] Operate the key. If you create this

[Formula] The code "82" for the key is output from the key code generator 12 and written to the 4th and 5th digits Y ₄ and Y ₅ of the Y register 19-2. the above

Since the [expression] key is not a modifier key, the first latch circuit 15 is not set. Then, the determination result in step _S1 is YES as in the previous time, and the process advances to step _S5 . In this step _S5 , the _4th to _8th digits of the X register 19-1
_The contents "99" and "95" are carried to 7th to _11th digits X ₇ to
Digits X ₄ and X ₅ are the 4th and 5th digits of Y register 19-2, Y ₄ ,
The content “82” of Y ₅ is transferred. Then, the process proceeds to step _S8 via step _S7 , and the first latch circuit 1 is
5 is determined, but since the content of the first latch circuit 15 is "0" at this point, the determination result is NO and the process proceeds to step _S10 . This step
At _S10 , the contents of the program counter 26 are incremented by 1 and the presence or absence of a carry signal at that time is determined. When the contents of the program counter 26 reach the final address, a so-called carry signal is generated, but in other cases no carry signal is generated. In this case, if it is determined that there is no carry signal, the process proceeds to step _S11 , where the second latch circuit 16 is reset, and then the process proceeds to step _S12 , where the X register 19-1 is changed so that the decimal point is displayed in the fourth digit. Set "4" to the 0 digit Xp. Processing then proceeds to step S ₁₃ where the external address addressed by the program counter 26 is
101 steps of RAM24

【formula】

【formula】

Write the program for [formula]. When the process _S13 is completed, the process proceeds to step _S14 , where the contents of the X register 19-1 are sent to the display section 22 and displayed. When the program writing is completed in this manner, a decimal point is displayed on the program content display section as shown in FIG. 5e, so that it is possible to confirm the completion of the program writing from the displayed content. Also, if it is determined in step _S10 that there is a carry signal, the step
The program proceeds to step _S14 without performing steps _S11 to _S13 , and displays the contents of the X register 19-1 at that time. Therefore, in this case, no writing is performed to the RAM 24, and the above-mentioned decimal point is not displayed. In the above embodiment, the key code is displayed as a two-digit numerical code, but it may also be displayed as an alphanumeric code and a numerical value, or only an alphanumeric code. Further, in the above embodiment, a decimal point is displayed when all data for one step has been input, but it goes without saying that other symbols such as a hyphen may be used in place of the decimal point. Furthermore, in the above example

【formula】

【formula】

Although we have explained the case where the key operation of [expression] is performed as an example, 1
If one function is executed in a step, as described above, multiple key operations correspond to one step and the same write processing is performed. As described above, according to the present invention, even when a modifier key is operated, the contents of the key operation are displayed, so the input of the modifier key can be confirmed, and operation errors can be eliminated. Furthermore, if a modifier key is operated by mistake, since no data has been written to the external RAM at that time, the correct data can be set by clearing the displayed data and continuing to input the keys. Furthermore, even when a modifier key is operated to move to the next step, the program step is incremented by +1 on the display, so the current step is displayed without error when inputting program data, which is very convenient for use.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is an external perspective view of an electronic calculator with a program, and FIG.
3 is a block diagram showing the circuit configuration, FIG. 3 is a diagram showing the data storage state of the X and Y registers in FIG. 2, and FIG. 4 is a flowchart showing the operation contents.
5A to 5E are diagrams showing key operations, storage states of various registers, and display states at that time. DESCRIPTION OF SYMBOLS 1...Case, 2...Keyboard, 4...Mode designation switch, 11...Key input section, 12...Key code generation section, 13...Control section, 14...Key data holding circuit, 15...First latch circuit, 16...Second Latch circuit, 19...RAM, 19-1...X register, 19
-2...Y register, 20...arithmetic circuit, 22...display section, 23...code conversion section, 24...external RAM,
25... Reverse code converter, 26... Program counter.

Claims (1)

[Scope of Claims] 1. A small electronic calculator with a program, comprising: a storage means for storing program contents; and when a modifier key is operated, a key code thereof is stored in an arithmetic register and is displayed on a display means. a first control means for causing the key code to be displayed on the display means together with the key code of the modifier key when the calculation designation key is operated, and storing the key code in the calculation register together with the key code of the modifier key; a second control means for performing predetermined code conversion and writing into the storage means; and a display control means for displaying a predetermined writing completion indication on the display means together with each of the key codes in response to completion of writing to the storage means. A modifier key input display method comprising: