JPS642181Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a small electronic calculator having a constant calculation function.

Conventionally, when performing calculations using the same arithmetic number a, such as "A x a", "B x a", "C x a"...
For example, after storing the arithmetic number a as a constant by performing key operations such as "a", "x", and "x",
Operands are “A” “=”, “B” “=”, “C” “=”
,
There are small electronic calculators that are equipped with a constant calculation function that calculates results sequentially through sequential operations. However, in addition to the constant calculations mentioned above, for example, "A+b", "B+b", "C+b",
It is necessary to perform calculations by changing the number of calculations or calculation means that should be constants across multiple types, such as ``A x c'', ``B x c'', ``C x c'', etc. In this case, even though the operands "A", "B", "C", . . . are the same, the key operations for the operands must be repeated every time the constant changes. Therefore, when there are many types of constant changes, key operations become extremely cumbersome.
Another drawback was that it was time-consuming.

This idea was made in view of the above points,
It is an object of the present invention to provide a small-sized electronic calculator having a constant calculation function capable of performing repeated calculations on a plurality of numerical data using one numerical data to be a constant by extremely simple calculation operations.

An embodiment of this invention will be described below with reference to the drawings. FIG. 1 is a system configuration diagram of a small electronic calculator. In Figure 1, 11 is a CPU (central processing unit), a bidirectional data bus DB that transfers data, and an address bus that transfers addresses.
A control bus CB to which control signals such as AB and read/write signals are sent is an input control unit 12,
They are connected to the display control section 13 and the print control section 14, respectively. Further, an input section 15 is connected to the input control section 12, and inputs a key input signal KI to an input buffer IN in the input control section 12 in accordance with a timing signal KB from the input control section 12. Further, a display section 16 is connected to the display control section 13 . This display section 16 performs a display operation in accordance with the digit signal DG from the display control section 13 and the segment signal SG obtained by decoding the data in the display buffer DI. Further, a printing section 17 is connected to the printing control section 14 . The printing unit 17 is, for example, a line printer, and sends a print position signal TP of the print drum to the print control unit 14, and the print position signal TP is generated by matching the data in the print buffer PR of the print control unit 14. The hammer is driven by a hammer drive signal to print on receipt paper and journal paper.

FIG. 2 is a diagram showing a detailed configuration of the CPU 11 in FIG. 1. In the figure, reference numeral 21 denotes a ROM (read-only memory) in which various microprograms are stored, and an address signal outputted from this ROM 21 is outputted to an address designation circuit 22. This addressing circuit 22 is a RAM
Sends out an address signal that specifies the row and column address of the register in 23, and also sends an address bus to the outside.
Address signals are sent via AB. the above
The ROM 21 outputs various control signals to the control section 24. This control unit 24 operates according to various control signals from the ROM 21, and sends a signal specifying the next address of the microprogram stored in the ROM 21, a read/write signal to the RAM 23,
A calculation signal is output to the remote calculation circuit 25. Above RAM
The calculation data outputted from 23 is sent to the calculation circuit 25, and the calculation result is input to the RAM 23. Furthermore, data is exchanged with the input control unit 12 and the like in the RAM 23 via the data bus DB. The determination result of the arithmetic circuit 25 is then input to the control circuit 24.

FIG. 3 is a diagram showing the storage contents in the RAM 23 in FIG. 2. In the figure, in the RAM 23, the F register is a register that stores a flag indicating whether or not a function key is operated; Registers that store the number of operations, A ₀ to A _{o .} . . registers are provided with registers that store numerical data.

Next, the operation of the present invention configured as described above will be explained. Now, for example, for products A to E as shown in Figure 4, the same discount rate (20% discount) and the same premium amount (20 yen increase) on the list price of each product
This will be explained by taking as an example the case where . First, when calculating the row-wise sum of list prices for products A to E shown in FIG. The contents of each register are all cleared to 0. After that, when the user inputs the list price "100" for product A using the key, the number "100" is stored in the X register. Next, when the "+" key is operated, the process shown in the flowchart of FIG. 5 is started. First, in step _S1 , the numerical value "100" stored in the X register is sent to the printing buffer PR and printed as shown in FIG. Next, step S ₂
Proceed to ``100'', the number stored in the X register.
is continuously stored in the <sub>A0</sub> register. Furthermore, proceeding to step <sub>S3</sub> , the numerical value "100" stored in the X register is added to the total value in the row direction of the data stored in the Y register, but in this case, the Y register is set to the initial value. Since "0" is set, "100" is stored in the Y register. Further, the process proceeds to step <sub>S4</sub> , where the contents of the X register are cleared to 0, and in step <sub>S5</sub> , n is incremented by 1 and ``1'' is stored. Below, "150" and "+"
When you key in "200", "+", "250", "+", "300", and "+", the entered numerical values are printed out as shown in Figure 8 through the process shown in the flowchart in Figure 5. At the same time, the numeric data "150", "200", "250", "300" are stored in the _A1 to _A4 registers, and the Y
"1000" is set in the register and "5" is set in the n register.

Next, in order to obtain the total of each list price for each product A to E, the "*" key, which is a total key, is operated. By operating this "*" key, the process of the flowchart shown in FIG. 6 is started. First, in step _S11 , the total value "1000" stored in the Y register is printed as shown in FIG. Then, in step _S12 , the above-mentioned total value "1000" is set in _A5 . Furthermore, the steps
Proceed to _S13 and obtain the contents of the n register, that is, the count value 5
is stored in the N register, and the contents of the Y register and the n register are cleared to 0 in step _S14 .

Next, when calculating the amount of the same discount rate (20% discount) for products A to E, enter "0.8" and "x", then operate a constant designation key, for example, the K ^* key, and enter "0.8". Set that is a fixed constant. The above K ^* RAM2 is
A flag "1" is set in the F register in 3.
Thereafter, the process of the flowchart shown in FIG. 7 is started by operating the K ^* key. First, in step _S21 , the fixed constant "0.8" stored in the X register is printed. Next, the process proceeds to step _S22 , where it is determined whether the flag "1" is set in the F register. In this case, since the flag is set to "1", the process proceeds to step _S23 and sets the fixed constant "0.8" stored in the X register.
A Operation with the numerical value "100" stored in the ₀ register (in this case, since the function key is a multiplication key, multiplication is performed, and the result of the operation "80" is stored in the Z register. S ₂₄
The contents of the Z register are printed. Next, proceeding to step _S25 , the contents of the n register are incremented by 1 and "n=1" is set. Then, in step _S26 , the contents of the n register and N+1 are compared. In this case, it is determined that n≠+1, and the process returns to step _S22 , where it is again determined whether or not the flag is set. Since the flag remains set,
Proceeding to step _S23 , the data is stored in the X register.
The fixed constant "0.8" is multiplied by the numerical value "150" stored in the _A1 register, and the result of the operation "120" is stored in the Z register. Further, the process advances to step _S24 and the contents of the Z register are printed. Next, proceed to step _S25 and the contents of the n register will be +1.
"n=2" is set. Then, in step _S26 , the contents of the n register and N+1 are compared. In this case, it is determined that n≠N+1, and the process returns to step _S22 , where it is again determined whether the flag is set. In the same way, the data stored in registers _A2 to _A5 is multiplied by the fixed constant "0.8", and the results are "160" and "200".
"240" and "800" are printed respectively. After the above calculation result "800" is printed, the contents of the n register are incremented and "6" is set in the n register. As a result, "n=N+1" in step _S26 above.
It is determined that "0" is set in the n and Z registers in step _S27 . Furthermore, the steps
Proceeding to _S28 , the flag of the F register is cleared to 0, and the processing for the K ^* key shown in FIG. 7 is completed.

Next, in order to add the same premium amount "20" to the list price of products A to E shown in FIG. 4, after keying in "20", operate the K ^* key. The above premium amount "20" is stored in the X register. Further, the K ^* key starts the process of the flowchart shown in FIG. 7 described above. First, step
At _S21 , the extra amount "20" stored in the X register is printed. Next, in step _S22 , it is determined whether the flag "1" is set in the F register. In this case, since the flag is not set to "1", the process advances to step _S29 . In this step _S29 , the fixed constant "20" stored in the X register and the numerical value "100" stored in the _A0 register are added,
The calculation result "120" is stored in the Z register.
The process then proceeds to step _S24 , where the calculation result "120" stored in the Z register is printed. moreover,
At step _S25 , the content of the n register becomes +1.
and "1" is counted. And step
At _S26 , the count value n and N+1 are compared.
In this case, it is determined that "n≠N+1" and the process returns to step _S22 , where it is again determined whether the flag "1" is set in the F register. In this case, the flag is not set, so proceed to step _S29 ,
The fixed constant “20” stored in the X register
Addition is performed to the numerical value "150" stored in the _A1 register, and the calculation result "170" is stored in the Z register. Then proceed to step S ₂₄ and Z
The calculation result "170" stored in the register is printed.

The following steps S ₂₅ → S ₂₆ → S ₂₂ →... are performed in the same way, and the fixed constant "20" is added to the data stored in the A ₂ to A ₅ registers, and the calculation result is "220", "270", "320",
"1100" is printed on each. After the above calculation result "1100" is printed, the contents of the n register are incremented and n is set to "6". As a result, it is determined in step _S26 that "n=N+1", and the process proceeds to step _S27 , where the n and Z registers are set to "0". Further, the process proceeds to step _S28 , where the flag of the F register is cleared to 0, and the processing for the K ^* key shown in FIG. 7 is completed.

As detailed above, according to this invention, a plurality of numerical data are input and stored in advance in each register of the storage means, and one numerical data that should be a constant is input and an operation is specified by the function key. when the plurality of numerical data are read out sequentially, and each time the numerical data is read out, the read numerical data and the input numerical data are sequentially operated according to the input function key, Since the calculation results are printed sequentially, even when it is necessary to repeatedly perform the same calculation using one numerical data on multiple numerical data to obtain the calculation results sequentially, you can specify the calculation in one operation. It is only necessary to perform the following, which greatly simplifies the calculation operations.

[Brief explanation of the drawing]

The drawing shows one embodiment of this invention.
The figure is a system configuration diagram of a small electronic calculator, and Figure 2 is a diagram showing the detailed configuration of the CPU in Figure 1.
Fig. 3 is a diagram showing the memory contents in the RAM, Fig. 4 is a diagram showing the list price etc. of products A to E, Figs. 5 to 7 are flow charts showing the operation, and Fig. 8 is a diagram showing the display state. FIG. 11...CPU, 12...Input control section, 13...
...Display control section, 14...Print control section, 22...Address designation circuit, 24...Control circuit, 25...Arithmetic circuit.

Claims (1)

[Claims for Utility Model Registration] Storage means comprising a plurality of registers each storing numerical data; input means comprising numerical keys and function keys for inputting numerical data and function data; and the storage means. a storage designation key for designating sequential storage of numerical data in each register of the storage means; clearing means for clearing the contents of each register of the storage means when the storage designation key is operated; means for sequentially storing numerical data input from an input means in each register of the storage means; and a means for sequentially storing numerical data inputted from an input means in each register of the storage means; reading means for sequentially reading numerical data; and each time the numerical data is read from the reading means, the read numerical data and the numerical data input by the numerical key are input before the operation of the calculation start key. A small electronic calculator having a constant calculation function, characterized in that it is equipped with a calculation means for sequentially executing calculations corresponding to function keys, and a printing means for sequentially printing the calculation results calculated by the calculation means.