JPS6145550Y2 - - Google Patents

Description

[Detailed explanation of the idea]

This invention relates to a small electronic calculator. During calculation processing using an electronic desktop calculator, the calculation process may be temporarily interrupted to perform other tasks, such as answering a telephone call or other errands, but when restarting the calculation, you may forget how far you have processed. Sometimes it happens. For example, even if a number or function display remains, it is difficult to determine whether the number represented by the display is the calculation data entered by operating the numeric key, or the calculation result displayed after operating the function key. Ta. Also, if you want to perform other calculations using the results of a calculation during the calculation process, you must consider the calculation order and memory usage timing in advance. It took a lot of effort to write down the calculation results etc. This idea was made in view of the above points,
The purpose is to provide a small electronic calculator that can perform interrupt operations during calculation. An embodiment of this invention will be described below with reference to the drawings. In FIG. 1, reference numeral 11 denotes a key input section, and the operation section of this key input section 11 is provided with a numeric keypad 11a, a function key 11b, and an interrupt (INT) key 11c for interrupting and canceling arithmetic processing. There is. The on/off information of each key of the numeric keypad 11a and function key 11b is transmitted to the ROM address section 1 via bus line a.
Sent to 2. And the ROM address section 12 is
An address is specified to the ROM (read only memory) 14 so as to execute a number flow, arithmetic flow, etc. specified by the key input unit 11. Also, the on/off information of the INT key 11c is passed through the binary counter (F) 13 to the ROM address section 12.
sent to. And the ROM address section 12 is a ROM
14 to execute an INT (interrupt) flow. That is, the above
The ROM 14 incorporates various microprograms such as a control microprogram for program calculation processing.
The ROM 14 sends various micro-instructions such as a row address signal U, a column address signal L, a numerical code CO, and an instruction signal INST to bus lines b, c, d, and e for addressing the internal RAM (random access memory) 15, respectively. Output in parallel. Note that the row address signal U is RAM1
The column address signal L is a signal that specifies each register such as X, Y, Z, A, B, etc. (in this embodiment, the This is a signal that specifies the digit of each register. The data in the RAM 15 specified by the ROM 14 is then sent to the arithmetic/judgment circuit 16 via the bus line f.
The calculation result from the judgment circuit 16 is sent to the RAM 15 via the bus line g and stored in a designated digit of the designated register. Note that the read/write signal R/W output from the instruction decoder 18 is input to the RAM 15 as a control signal, and
The RAM 15 controls data reading from the RAM 15 and data writing to the RAM 15. The data read out from the RAM 15 and the numerical code signal CO are input to the arithmetic/judgment circuit 16. These input data are subjected to various processes such as addition, subtraction, and judgment in the arithmetic/judgment circuit 16 in accordance with a control signal outputted from the instruction decoder 18. The result of the calculation is sent to a designated register in the RAM 15 via the bus line g and stored therein, and when a judgment process is performed, a judgment result signal is output from the calculation/judgment circuit 16, and the ROM address is Part 1
2, and the address of the next step is specified in accordance with the determination result signal. The instruction signal INST is sent to the instruction decoder 1.
8 and is decoded to create various control signals as described above. Of these control signals, a reset signal R is input to the binary counter 13 to clear its contents. Next, the operation of the compact electronic calculator of this invention constructed as described above will be explained with reference to FIGS. 2 to 5. First, when the power is turned on, the instruction decoder 18 outputs a reset signal of 2.
It is output to the advance counter 13 and reset. In this state, in order to execute a series of operations "30+10-25=", input the numeric data "30" from the key input section 11 as shown in FIG. The numeric flow shown in FIG. 3 is executed. That is, step
In _S11 , numeric data "30" is specified by the row address signal U and column address signal L output from the ROM 14, and is stored in the numeric data area of the X register (hereinafter referred to as _XV ) in the RAM 15. . The numeric data "30" stored in the X register is then passed through the calculation/determination circuit 16 as shown in FIG.
It will be displayed as shown. Next, the key input section 11
When the function data "+" is input as shown in FIG. 2, the calculation flow shown in FIG. 4 is executed. Then, in step _S21 , it is determined whether calculation is possible. This is determined by whether or not function data is stored in the function area (hereinafter referred to as X _F ) of the X register. In this case, since the function data has not yet been stored in _XV , the determination is "NO" and the process proceeds to step _S22 . Here, the contents of X _V are transferred to the numeric data area of the Y register (hereinafter referred to as Y _V ), the function data "+" inputted this time is stored in X _F , and the contents of the X register are transferred. is output to the display section 17. Next, when inputting the number data "10" shown in FIG. 2, the number setting flow shown in FIG. 3 is executed. In step _S11 , the numeric data "10" is stored in _XV in the same manner as described above, and its contents are output to the display section 17. Next, when the function data "-" shown in FIG. 2 is input, the calculation flow shown in FIG. 4 is executed. Then, in step _S21 , it is determined whether calculation is possible. Since the _function data “+” input last time is stored in
Proceed to S ₂₃ . In this step _S23 , it is determined whether the binary counter 13 is "1" or not. Here, still

[Formula] Since the key is not operated, F=0, so the process advances to step _S24 . In this step _S24 , the numeral data "10" stored in X _V is transferred to the numeral data area of the A register (hereinafter referred to as A _V ). Furthermore, the function data "-" input this time is the function data area of the A register (hereinafter referred to as A _F ).
is stored in Then, _an operation is performed according to the previously input function data "+ _" stored in X _F in FIG. 2, and the result of the operation "40" is placed in the data area (hereinafter referred to as _BV ). Furthermore, the function data "-" input this time is stored in the function data area (hereinafter referred to as B _F ) of the X _F and B registers. Then, the contents of the X register are output to the display section 17, and the processing in the flowchart of FIG. 4 is completed. Next, as shown in FIG. 2, if "25" should have been entered, but only the numeric data "2" is input due to a telephone call, etc., then the numeric entry flow shown in FIG. 3 is executed. and step
At _S11 , the digit data “2” is stored in _XV ,
The contents of the X register are output to the display section 17, and the process ends. Therefore, when the operator's interrupt task is completed, the key operations shown in Figure 2 6 are displayed to confirm the previous key operations.

When the [Formula] key 11c is operated, the INT flow shown in FIG. 5 is expanded. Then, in step _S31 , the binary counter 13 is incremented by "+1". Next, in step _S32 , it is determined whether the content of the binary counter 13 is "1". In this case, since F=1, the determination is "YES" and the contents of the A register are transferred to the X register. As a result, the previously input function data "-" stored in the A register and this function data "-"
The numeral data "10" inputted before is stored in the X register and displayed on the display section 17, and the flowchart of FIG. 5 is completed. In other words, it can be seen that the "10-" key operation was performed before the interrupt task. Next shown in FIG.

[Formula] When the key 11c is operated again, the INT flow shown in FIG. 5 is developed. Then, in step _S31 , the binary counter 13 is incremented by "+1". Next, step
In _S32 , it is determined whether the content of the binary counter 13 is "1". In this case, since F=0, the determination is "NO" and the contents of the B register are transferred to the X register. As a result, the currently input function data "-" stored in the B register and the previous calculation result "40" are stored in the X register and displayed on the display unit 17, as shown in FIG. The flowchart ends. Next, when the numeral data "25" shown in FIG. 2 is input, the numeral flow shown in FIG. 3 is executed. Then, in step _S11 , the numeral data "25" is stored in _XV , the contents of the X register are output to the display section 17, and the process ends. Next, □= shown in Figure 2 9
When a key is input, the calculation flow shown in FIG. 4 is developed. Then, in step _S21 , it is determined whether calculation is possible. Since the function data "-" is stored in _XF as shown in FIG. 2, the determination is "YES" and the process proceeds to step _S23 . In this step _S23 , it is determined whether the binary counter 13 is "1" or not. Here, last time

Since F=0 was returned when the [expression] key was operated, the process advances to step _S24 . In this step _S24 , the numeric data "25" stored in _XV is transferred to _AV . Furthermore, an operation is performed using the function data “-” stored in X _F , and the operation result “15” is assigned to X _V , Y _V , B
Stored in _V. The contents of the X register are also displayed on the display section 17, and the processing of this flowchart is completed. As explained above, the series of operations ``30+10
-2” after

[Formula] Operate key 11c to interrupt the calculation operation, and then

[Formula] Operate key 11c to cancel the interrupt and enter "25" again. "30 + 10 -
25" calculation is performed. Next, another embodiment of this invention will be described. First, when the power is turned on, the instruction decoder 18
A reset signal is output from the binary counter 13 to reset it. Next, the key input section 11
Therefore, as shown in FIG.
The number flow shown in FIG. 3 stored in 4 is executed. Then, in step _S11 , the numeric data "123" is specified by the row address signal U and column address signal L output from the ROM 14.
Stored in _XV in RAM15. Then, the numeric data “123” stored in the above X register is calculated/
It is output to the display section 17 via the judgment circuit 16.
Next, when the function data "+" is inputted from the key input section 11 as shown in FIG.
The calculation flow in the figure is developed. And the steps
In _S21 , it is determined whether calculation is possible. This is determined by whether or not function data is stored in X _F shown in FIG. 61. In this case, since the function data has not yet been stored in _XF , the determination is "NO" and the process proceeds to step _S22 . Here, the content of X _V is Y
The function data “+” that was transferred to _V and entered this time is stored in X _F , and
The contents of the register are output to the display section 17. Next, when the number data "456" shown in FIG. 6 is input, the number setting flow shown in FIG. 3 is executed. Then, in step _S11 , the number data “456” is
_V , and its contents are output to the display unit 17. Next, when the function data "+" shown in FIG. 6 is input, the calculation flow shown in FIG. 4 is executed. Then, in step _S21 , it is determined whether calculation is possible. Since the previously input function data "+" is stored in _XF as shown in FIG. 6, the determination is "YES" and the process proceeds to step _S23 . In this step _S23 , it is determined whether the binary counter 13 is "1" or not. still here

[Formula] Since the key is not operated, F=0, so the process advances to step _S24 . In this step S ₂₄
The numeric data “456” stored in _V is transferred to A _V. Furthermore, the function data "+" input this time is stored in A _F. and the sixth
An operation is performed according to the previously input function data "+" stored in _XF in FIG. 3, and the operation result "579" is transferred to _XV , _YV and _BV . Furthermore, the function data "+" input this time is stored in X _F and B _F. Then, the contents of the X register are output to the display section 17,
The processing in the flowchart of FIG. 4 is completed. Here, in order to perform the interrupt operation, as shown in FIG.
shown in

When the [Formula] key 11c is operated, the INT flow shown in FIG. 5 is developed. Then, in step _S31 , "+1" is added to the binary counter 13.
be done. Next, in step _S32 , it is determined whether the content of the binary counter 13 is "1". In this case, since F=1, it is determined as "YES", and A
The contents of the register are transferred to the X register. As a result, the previously input function data "+" stored in the A register and the numeric data "456" input before this function data "+" are stored in the X register. ,
This is displayed on the display unit 17, and the flowchart of FIG. 5 ends. Next, when inputting the number data "30" shown in FIG. 6, the number setting flow shown in FIG. 3 is developed. Then, in step _S11 , the numeric data "30" is stored in _XV , and its contents are output to the display section 17. Next, when the function data "x" shown in FIG. 6 is input, the calculation flow shown in FIG. 4 is developed. And the steps
In _S21 , it is determined whether calculation is possible. This is determined by whether or not function data is stored in X _F shown in FIG.
In this case, since no function data is stored in _XF , the judgment is "NO" and the step is
Proceed to S ₂₂ . At this point, the contents of _XV are transferred to _YV , and the function data "x" inputted this time is stored in _XF and output to the display section 17. Next, when the numeral data "6" shown in FIG. 7 is input, the numeral flow shown in FIG. 3 is executed. Then, in step _S11 , the numeral data "6" is stored in _XV and displayed on the display section 17, and the flowchart of FIG. 5 is ended.
Next, when the □= key shown in FIG. 7 is input, the calculation flow shown in FIG. 4 is developed. Then, in step _S21 , it is determined whether calculation is possible. X _F has the function data “×” as shown in Figure 7 and 8.
is stored, the determination is ``YES'' and the process proceeds to step _S23 . In this step _S23 , it is determined whether the binary counter 13 is "1" or not. Here, since F=1, the process advances to step _S25 .
In this step _S25 , the calculation "30×6" is performed, and the calculation result "180" is stored in XV _{and YV} and displayed on the display section 17. Next, Figure 7 1
shown in 0

[Formula] When the key 11c is operated again, the INT flow shown in FIG. 5 is expanded. Then, in step _S31 , the binary counter 13 reads "+".
1” is done. Next, in step _S32 , it is determined whether the content of the binary counter 13 is "1". In this case, since F=0, the determination is "NO", and B
The contents of the register are transferred to the X register. As a result, the function data "+" stored in the B register and the calculation result "579" up to that point are stored in the X register and displayed on the display section 17, and the flowchart shown in FIG. finish. Next, when function data "+" is input as shown in FIG. 7 and 11, the flowchart in FIG. 4 is executed. And the steps
The contents of _XV in FIG. 7 and 10 are transferred to _AV through steps _S21 , _S23 , and _S24 , and the function data "+" input this time is stored in _AF . Therefore, the calculation "579+180" is performed using the function data "+" input last time, and the calculation result "759" is stored in X _V , Y _V and B _V . Furthermore, the function data "+" input this time is stored in X _F and B _F and displayed on the display section 17. Next, when the numeric data "10" is input as shown in FIG. 7, the numeral flow shown in FIG. 3 is executed. Then, in step _S11 , this number data "10" is stored in _XV and displayed on the display section 17. Next, when the □= key shown in FIG. 7 is input, the flow shown in FIG. 4 is executed. Then, through steps S ₂₁ , S ₂₃ , and S _{24 ,} the number data “10” stored in X _V is transferred to A _V
The calculation result of "759+10" is performed, and the calculation result "769" is stored in X _V , Y _V , and B _V .
As explained above, after the series of operations "123+456+"

[Formula] Operate key 11c to interrupt the calculation operation, and in the meantime perform other calculations ``30×
6” and then again

[Formula] Operate key 11 c to cancel the interrupt and select "579+
180" movement. As described in detail above, according to this invention, a save data storage means is provided to save and store the calculation result and key input data input before the start of the calculation process from the calculation process operation, and Accordingly, key input data and calculation results stored in the save data storage means are transferred to the data storage means as appropriate, and a means for preventing new data from being input to the save data storage means is provided. Even if the operator leaves his/her desk in the middle of the calculation to make a phone call or other errand, he/she can easily see how far the calculation has been made by setting the computer to an interrupt state; This makes it possible to interrupt another calculation.

[Brief explanation of the drawing]

Fig. 1 is an overall circuit configuration diagram showing one embodiment of this invention, Fig. 2 is a diagram showing changes in the contents of the register and display section to explain the embodiment, and Figs. 3 to 5 are A flowchart showing the operation of the same embodiment, and FIGS. 6 and 7 are diagrams showing changes in the contents of the register and display section to explain another embodiment of this invention. 11...Key input section, 12...ROM (read only memory) address section, 13...Binary counter, 14...ROM (read only memory), 15
...RAM (Random Access Memory), 16...
Arithmetic/judgment circuit, 17...display section, 18...instruction decoder.

Claims (1)

[Claims for Utility Model Registration] (1) Key input means having numerical keys, function keys, and specific keys, and calculation means for performing calculation processing based on numerical data and function data input from the key input means. , a data storage means for storing the data input from the key input means or the calculation result in the calculation means and outputting the stored contents to the calculation means; and a display means for displaying the contents of the data storage means; When a calculation result is obtained in the calculation means, a save data storage means for saving the calculation result and data input from the key input means from the calculation processing operation before the calculation process is performed, and storing the calculation result; In response to the operation of the specific key, key input data and calculation results stored in the saved data storage means are appropriately transferred to the data storage means, and new data is prevented from being input to the saved data storage means. A small electronic calculator comprising means for (2) The small electronic device according to claim 1 of the utility model registration claim, comprising means for canceling the blocking of inputting new data into the saved data storage means in response to a second operation of the specific key. Formula calculator.