JPS60243762A - Data input system - Google Patents

Abstract

PURPOSE:To simplify data input operation by detecting that the data is inputted already on the basis of flag state when a variable is used twice or more in a program, and reading out the inputted data from a register to calculate the data. CONSTITUTION:Data necessary for the operation of the program are inputted from keying part 11 to a control part 12, which is connected to an operation register part 13, an operation part 14, an address flag control part 15, and a program counter 16. The operation register part 13 executes various arithmetic operations together with the operation part 14 on the basis of program data outputted from a program RAM17 and variable data used for the operation and the operated variable data are stored in a variable RAM18. When the variable data are used twice or more in the program, the fact that the data is inputted already is detected on the basis of the flag status and the inputted data are read out from the variable RAM18 to operate the data.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a data input method for a small electronic calculator equipped with a program calculation function.

[Prior art and its problems]

For example, when executing an algebraic expression such as 10A 〇''B by using variables A, B, and C in a small electronic calculator that has a program calculation function, conventional models have the following information: f(ABC ) = 10XA + 5inB xc', setting formula f (ABC) to specify variables A, B, and C.
It is known that this must be set on the left side of an algebraic expression that can be requested in advance.

However, with the above-mentioned calculator, especially in the case of algebraic expressions that use many variables, the setting expression is f(ABC...
), which makes it impossible to display the arithmetic expression within the limited display area. Also, when changing the algebraic expression and increasing the variable, f(AB
C) also had to be changed, resulting in complicated key operations.

[Purpose of the invention]

The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide a data input method for a small electronic calculator equipped with a program calculation function that allows easy key operations for data input.

[Key points of the invention]

That is, this invention provides a flag corresponding to a register into which a variable is input, sets the flag when variable data is input to the register, and sets the flag when the variable is used more than once in the program. Detecting that data has already been input based on the state of the flag, reading the input data from the register and performing calculations.
It simplifies data entry operations.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows the circuit configuration of the data input method of the present invention.
The information is input to the control unit 12 by operating the numerical keys and function keys inside. The control section 2 performs control operations according to data input from the key human power section 11, and is connected to the calculation register section 13, calculation section 14, address, flag control section Z5, and program data 16, respectively. 16 program counter control unit 12
The contents of the count are sent to the program RAM 77 in which the log data for program calculation inputted from the key manual section 11 is stored. As a result, the address of the program data at the time of writing and reading is specified by the count data inputted from the program RAM 77a and the program data 16, and the program data read here is stored in the above-mentioned calculation register. Sent to Department 13. The calculation register unit I3 performs various calculation operations with the calculation unit 14 based on the program data from the program RAM 77. Variable data used in the calculations and variable data of the calculation results are stored in the variable RAM 78. be done. This variable RAM 18 has internal designated addresses N,,N,.

Variable data is written to..., and the variable 7 lag F1 m corresponding to this address N,,N,...
Fte... and an equal flag Feq are provided.

The above addresses Nt -Nz -Ns... correspond to the registers corresponding to the variables A, B, C..., and each character code of the variables A, B, C... corresponds to the above address. It corresponds to N,,N,,N,... The states of these variable flags FIeFILy... and equal flag F@q are determined by the flag determining section 19,
The determination result is sent to the address and ring control section 15-1. Further, the program data read from the program RAM 77 is sent to the address and flag control section 15 and variable determination section 2 via the buffer 20. The variable determining unit 2 determines whether the program data inputted from the program RAM 77 via the buffer 20 is a variable, equal, or something else, and transmits the determination result to the above-mentioned attribution. , and input to the flag control unit 15. This address/flag control unit 15 receives data, signals, etc. sent from the program RAMJ 7 and variable determination unit 2 via the flag control unit 19 and buffer 20, respectively, and is inputted from the control unit 2. The addresses N, , N, etc. of the variable RAM 18 and the flag Fl are selected as appropriate according to the control data.
.

It controls Ft, ..., Feq.

Next, the operation of the above embodiment will be explained with reference to flowchart 1 in FIG. The second section shows the operation control during execution of the program performance and dance, and here, for example, the following calculations are performed. In other words, program the algebraic expression and set variables A and B.

By inputting numerical values into D, calculation results C and E can be obtained.

After inputting the program data according to the formulas (a) and (b) above, the l'
-When you press the RUNJ key or an equivalent key to run the program, the first thing that happens is:

In step S1. As shown, the variable flag F1. in the variable RAM 18. F2 ,... and equal flag F
eq is cleared. Then, in step S+z, the variable rAJ as a program at the first address of the program RAM 17 is read out. In step sls, the variable determining unit 2 determines whether rAJ is a variable. In this case, since "A" is a variable, the process proceeds to step Sm, and the address N of the variable RAM 7B is specified by the character code of the variable rAJ. Then, in step SI5, the flag control unit 19 determines whether the content of the equal flag Feq is "0", that is, whether "=" has already been read out. Since it is “0” here, step 8
Proceeding to Ill, it is determined whether the content of the variable flag F, corresponding to the specified address N, is '40''.Here, the variable 7 lag F, is 0'', so the address flag The control unit 15 performs step 81? In step S, the variable flag F is set to "1", and in step S, an input command is sent to set the variable r.
AJ enters a numeric input standby state. A numerical value is input using key input section 1, and then the execution key [F] X E J
When the key is operated, as shown in step S19, the input numerical data is written to the address N of the variable RAM 7B and to the calculation register. This completes the input process for the variable rAJ, and in step S20 a signal is input to the program counter for the next program process. The program data block 16 increments the count contents according to the input signal, and then steps S7. Then, the program RAM 77 is instructed to read out the next program.

In step 812, the next program word after "A", "+", is read. This "+" is the step S
13, it is determined that it is not a variable, and step 8n
VC proceed. In step S21, it is determined whether this "+" is equal or not, and "ten" (d
It is determined that it is not "-", and the process proceeds to step SB. Then, in step 823, after the arithmetic processing is performed in the arithmetic section 14, the process proceeds to step s2, and the program power unota 1 is read out in order to read the next program.
The contents of 6 are counted up and the process proceeds to step S, 2.

At step S12, the variable rBJ is read out from the program RAM 77 in the same manner as described above. Step 8 for this rBJ as in the case of “A” above.
14-SIA is executed. Then, step S1.
When a numerical value is input while waiting for numerical input of variable rBJ, in the next step S+a, the numerical value for variable rBJ is input to the address N2 of the variable RAM and to the calculation register 13.

Next, 1=", that is, equal is read out. This equal is determined not to be a variable in step S13, and the process proceeds to step S2. Then, it is determined that they are equal, and the process proceeds to step S4-\.

In step S22, the contents of the equal flag Frq are set to 11 and #l, and then in step S21
1, a calculation of JA+BJ is performed using the numerical value input by the calculation unit 14.

Next, when rCJ is read out in step S12 after passing through step S9, this "C" is
1 (, step S
At step 14, the address N3 of the variable RAM 18 for inputting the numerical data of the variable C is designated. Next, as shown in step S15, the content of the equal flag Feq is determined. In this case, the content of the equal flag Feq is set to tLIll in step 822, so the process advances to step SA. Step S
At u, the equal flag FF, q is set to "0"', and the variable flag F, corresponding to the specified address N, is set to '1'.

Then, in step S25, the above program "="
f−A − calculated in step 823 in the case of
The data of the operation result of 1-B J is stored in the operation register section 1.
3 to the specified address N in the variable RAM 1B.

Next, in order to execute the above equation (b), the program RAM 7
7, "C" is read out again. In step S13, this "C" is determined to be a variable, and in step S14
The variable RA, address N of M18, is specified. Here, in step S24, the equal flag Feq is set to "O", and the variable flag F is set to "O".
Since it is set to II, after step S14, the process proceeds from step S11 to step S16, and then proceeds to step 82B.

In step S26, the already calculated "C
'' is read from the address N3 of the variable RAM 78, inputted into the calculation register section 13, and the process proceeds to step S tO.

The following rX is read out sequentially from the program RAM 77.
J, rDJ, r-J', rAJ, r-J and rEJ are
Steps similar to those described above are followed, and arithmetic operations are executed.

FIG. 3 explains the calculation operations in the above embodiment. After inputting the calculation program shown in FIG.
Perform arithmetic operations.

First, as shown in FIG. 3 (1), in order to start execution of program calculations, [R
When you operate the UNJ key 11), the first program rA
J is read out. Here, the variable 7 lag F corresponds to the address N to which the numerical value of the variable A in the variable RAM 77 is input.

Ha, step SI? is set to 1111I, and prompts the display unit 30 to input the numerical value of the variable rAJ.
? ' will be displayed.

Next, in Figure 3 (2), the value “1” to be assigned to variable A is
When "0" is pressed manually, the input numerical data "10" is displayed on the display section 30 because a part of the calculation register section 13 is used as a display register.

Then, as shown in Figure 3 (3), press [EXE J key 1
12, step S1. As shown in FIG. 8, the data is written to the address N of the variable RAM J8 and the arithmetic register section 13, and steps S20°812 to S816 are executed as described above.

Further, in step S17, the variable flag F2 in the variable RAM 1B is set to 1'', and the process proceeds to step 8+11, where the state waits for input of numerical data of variable B.
The characters “B?” prompting the user to input the variable rBJ are displayed on the display unit 30.

Next, as shown in FIG. 3 (4), when the numerical data "5" is entered manually, the display L/
The register numerical data “5” is written, and the numerical data “5” is written.
5" is displayed.

Then, in FIG. 3 (5), when the "EXE" key 112 marked -
" is written and step 5211 * S12 +S
I! t ”'!l + S22 + S23 * S
+, “SIl + 813 + Stsu 4 + JR + 8t4
The process proceeds to Step Su, where the variable flag Fs corresponding to the variable C is set to 111 II. Also, step S2
Next, variable RAM 7. '? variable C at address N,
As the numerical data, the calculation result of calculation ``A + B'' is ``15
" is input.

Furthermore, step Stol 512-8 +* is executed, prompting for the input of numerical data of the next variable "D""D?"
” are displayed on the display section 3θ. In this case, the variable flag F4 corresponding to the variable in the variable RAM 18 has '1'.
''' is set.

Next, in Figure 3 (6), the numerical data "2" is entered in the variable.
Input 1'-EX' as shown in Figure 3 (force).
When the EJ key 112 is operated, this numerical data "2" is transferred to the variable r of the calculation register section 13 and the variable RAM 1B.
It is input at the address N, which corresponds to the DJ.

Then, the calculation “CxD-Aj
is performed, and the calculation result “20” is stored in the variable RAMJ &
is written to the position of address N, and is also input to the arithmetic register unit 13 and displayed on the display unit 30. Here, the variable flag F corresponding to the address N of the variable RAM J8 is set to "1'', which indicates that numerical data has been input to the variable E, and the calculation ends.

In the above embodiment, the formula used for the program calculation is set so that variable data is input on the left side and the calculation is performed, and the result of the operation is calculated on the right side. −
However, it is also possible to set the calculation result that can be requested on the left side, such as , and set the part for inputting variable data on the right side.

Further, in the above embodiment, the variable flags Fl, F,.

... are provided for each register for storing variable data, but variable flags "ImFt..." may be provided separately.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to provide a data input method for a small electronic calculator having a program calculation function that allows easy data input operations and allows effective use of the display section.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, in which Fig. 1 is a block diagram showing the circuit configuration, Fig. 2 is a flowchart showing operation control, and Fig. 3 shows the states of the display section and registers corresponding to key operations. FIG. 1 No...Key human power department, 111...RUN key, 11
2... EXE key, 12... Control section, 13... Arithmetic register section, 14... Arithmetic section, 15... Address/flag control section, 17... Program RAPIi,
18... RAM for variables, F, p Fz +... variable flag, Feq... equal flag, 19... flag determination unit, 21... variable determination unit.

Claims (1)

[Claims] In a small electronic calculator equipped with a program calculation function, a program storage means for storing a program, a variable storage means for storing variable data numerically input for variables in the program, and a variable storage means provided for each of the variables, a flag storage means for storing a flag set to a first state when numerical data is input to the variable;
a flag discriminating means for discriminating the state of the flag in the flag storage means; and when the flag discriminating means determines that the flag corresponding to the variable is not in the first state, the flag corresponding to the variable in the variable storage means is matched with the flag in the variable storage means; control means for controlling the storage means to input numerical data into an area corresponding to the variable, and output the stored numerical data from the area corresponding to the variable in the storage means when it is determined that the flag is in the first state; A patented data input method that has the following features.