JP2000132518A - Small electronic computer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a small electronic computer which can eliminate a complicated operation that is needed for calling out an arithmetic expression that was carried out in the past and also can easily retrieve the arithmetic expression in both directions to the old and new sides. SOLUTION: An arithmetic expression that was inputted in the past and stored in an arithmetic expression storage buffer is called out to an arithmetic expression input buffer by an arithmetic expression retrieval means. The arithmetic processing is automatically carried out by the said calling operation and this processing result is displayed. At the same time, the arithmetic result, etc. corresponding to an arithmetic expression is stored and then displayed when a past arithmetic expression is called out by the arithmetic expression retrieval means. In either of both cases, the arithmetic expression is not stored again.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a small computer, and more particularly, to a small computer capable of inputting and calculating an arithmetic expression.

[0002]

2. Description of the Related Art Conventionally, as disclosed in Japanese Utility Model Application Laid-Open No. Sho 62-89047, means for storing the operation result of an operation expression is provided, and the operation result stored in this means is used for inputting the next operation expression. There was a small computer that could be taken out and used. However, this kind of small-sized computer has a drawback in that it can only remember the arithmetic expression calculated last time and cannot call the arithmetic expression executed before that. In addition, there is a small computer which can store and call a plurality of arithmetic expressions by applying this method.

[0003]

However, in order to sequentially call previous arithmetic expressions and view the result, a series of steps of calling and displaying the arithmetic expressions, executing (calculating) the arithmetic operations, and storing the arithmetic expressions again are performed. There is a problem that the operation is complicated because it must be performed as a unitary procedure.
In addition, if the above-described processing is executed as a series of procedures, the storage of the arithmetic expression is repeatedly performed at each call, so that the same arithmetic expression redundantly stored increases.
If you try to call another desired arithmetic expression, it has already disappeared due to low storage capacity, it is stored earlier than expected, or the order is different from what you thought There was also a problem that it became difficult to call. In addition, since there is always only a direction for searching for a previous arithmetic expression in a direction for searching for an arithmetic expression, there is also a problem in that if it returns once, it is necessary to search for the arithmetic expression again from the beginning.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and is a small-sized electronic computer capable of storing and calculating an arithmetic expression. It is an object of the present invention to provide a small-sized computer capable of performing such operations.

[0005]

In order to achieve the above-mentioned object, the present invention according to claim 1 provides input means for inputting an arithmetic expression, and temporarily stores the arithmetic expression input by the input means. An arithmetic expression input buffer for holding the arithmetic expression, an arithmetic means for executing an arithmetic operation of the arithmetic expression in the arithmetic expression input buffer, an arithmetic expression storage buffer for sequentially storing arithmetic expressions previously input to the arithmetic expression input buffer, An arithmetic expression search means for sequentially recalling the arithmetic expressions stored in the arithmetic expression storage buffer to the arithmetic expression input buffer, wherein the arithmetic means comprises: A small-sized computer according to claim 1, wherein said operation is executed when said operation expression is recalled to said operation expression input buffer.

According to a second aspect of the present invention, there is provided input means for inputting an arithmetic expression, an arithmetic expression input buffer for temporarily storing the arithmetic expression input by the input means, and an arithmetic expression input buffer. Calculating means for executing the operation of the operation expression in the buffer; operation expression storage buffer for sequentially storing operation expressions previously input to the operation expression input buffer; and operation of each operation expression stored in the operation expression storage buffer A buffer for storing the result and the operation mode, and an operation expression search means for sequentially calling and displaying the operation expression stored in the operation expression storage buffer, the operation result of the operation expression stored in the buffer, and the operation mode And a small computer.

According to the first aspect of the present invention, when an operation expression is called from the operation expression storage buffer to the operation expression input buffer, the operation is executed and the result is automatically displayed. Can be called and recalculated. Also, the operation formula is not stored each time it is called, and the storage order of the operation formulas is always stored in the same order, so that the desired operation formula can be called very easily.

According to the second aspect of the present invention, since the arithmetic expression, its calculation result and the calculation mode are stored, there is no need to recalculate the arithmetic expression. For this reason, the operation expression can be called very quickly. Further, since the order of storing the arithmetic expressions is always kept constant, a desired arithmetic expression can be called very easily.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a schematic structural view of a small computer which embodies the present invention. Reference numeral 1 denotes a display for displaying an arithmetic expression or an arithmetic result, 2 denotes an arithmetic result search key, 3 denotes a numeric key for inputting a numerical value, 4 denotes an operator key for inputting an operator, and 5 denotes an arithmetic operation. Is a calculation execution key for performing The calculation result search key 2 is a key 2a used for searching in an old direction and a key 2a used for searching in a new direction.
b.

FIGS. 2, 3 and 4 are an internal block diagram of the small computer and a diagram showing the internal configuration of the RAM, respectively. The CPU 9 operates in accordance with a program preset in the program ROM 10 in accordance with a user's input to the keyboard 6, and a display RAM is used for displaying.
The RAM 8 is accessed when data is written in the memory 7 and an arithmetic expression is stored or operated. RAM 8 is shown in FIG.
Alternatively, in the case of a configuration including an operation expression input buffer 11 and an operation expression storage buffer 12 as shown in FIG. 4 (first embodiment), or an operation expression input buffer 11, an operation expression storage buffer 12, an operation result buffer 13, and There is a case where the operation mode buffer 14 is used (the second embodiment).

The arithmetic expression input buffer 11 is an arithmetic expression storage area necessary for use when performing input editing of an arithmetic expression. The operation expression storage buffer 12 is an operation expression input buffer 11
This is the area required to save the expression executed in. The arithmetic expression storage buffer 12 stores the arithmetic expression input buffer 1
The arithmetic expressions executed in step 1 are stored in order. The operation result buffer 13 is an area for storing the operation result corresponding to the operation expression in the operation expression storage buffer 12. The operation mode buffer 14 is an area for storing the operation mode when the operation expression in the operation expression storage buffer 12 is executed. In the operation result buffer 13 and the operation mode buffer 14, both the operation results and the operation modes are sequentially stored so as to correspond to the operation expressions stored in the operation expression storage buffer 12.

FIG. 5, FIG. 6 and FIG. 7 are views for explaining a first embodiment of the present invention. FIG. 6 is a diagram for explaining a processing procedure at the time of executing an operation. This figure shows that, after an arithmetic expression is input from the keyboard 6 and the arithmetic execution key 5 is pressed and the arithmetic expression is calculated, the executed arithmetic expression is additionally stored in the arithmetic expression storage buffer 12 to store the arithmetic expression. Is shown.

FIG. 5 is a diagram for explaining a calculation result search processing procedure according to the first embodiment of the present invention. This figure shows a process associated with the operation result search key 2a. That is, this is a process of searching for an input operation expression in the old direction. First, it is determined in processing 1 whether or not a search for a previously executed arithmetic expression is being performed. When it is determined in the processing 1 that the search is not being performed, the processing proceeds to the processing 2 and it is determined whether or not it is immediately after the calculation. If it is determined in the processing 2 that the processing is not immediately after the operation, the processing proceeds to the processing 3 and the last executed arithmetic expression is called from the arithmetic expression storage buffer 12 to the arithmetic expression input buffer 11. next,
Proceeding to processing 5, the arithmetic operation of the expression in the arithmetic expression input buffer 11 is executed to calculate the operation result. Next, the process proceeds to a process 6, where an arithmetic expression searching flag is set, the arithmetic result and the arithmetic expression are displayed, and the process ends. On the other hand, if it is determined in the processing 1 that the previously executed arithmetic expression is being searched, or if it is determined in the processing 2 that the arithmetic expression has just been calculated, the processing proceeds to the processing 4 and immediately before the currently displayed expression. Is called from the arithmetic expression storage buffer 12 to the arithmetic expression input buffer 11. Next, the processing 5 and the processing 6 described above are executed, and the processing ends.

In the processing of the operation result retrieval key shown in FIG. 5, in the execution key processing, the operation expression stored in the operation expression storage buffer 12 is searched for the operation expression from the last operation expression to the oldest one. The calculation results are displayed by calling them sequentially in the direction.

FIG. 7 shows a process for retrieving an arithmetic expression from an arithmetic expression last calculated from an arithmetic expression once stored in the arithmetic expression storage buffer 12 to an old one, and then searching for a new one. The procedure is shown. That is, this is a process associated with the arithmetic expression search key 2b. First, it is determined in processing 7 whether or not a search for a previously executed arithmetic expression is being performed. When it is determined in the process 7 that the search is being performed, the process proceeds to the process 8, and
An arithmetic expression one newer than the currently displayed arithmetic expression is called into the arithmetic expression input buffer 11. Then, the process proceeds to a step 9, wherein the operation of the expression in the operation expression input buffer 11 is executed to calculate the operation result. Next, the process proceeds to a process 10, in which an arithmetic expression searching flag is set, the arithmetic result and the arithmetic expression are displayed, and the process ends. On the other hand, if it is determined in the process 7 that the previously executed operation formula is not being searched, the process is terminated.

In the arithmetic expression search processing in the new direction, the results of the arithmetic expressions are displayed in the order in which the arithmetic operations are executed, in contrast to the search processing of the arithmetic expression in the old direction. When the operation result is called by the operation result search key 2, even if the operation is executed, the operation expression is not newly registered, that is, the operation expression storage buffer 12
Did not remember again. Thus, the order of the arithmetic expressions is preserved even if the search is performed many times, and the number of the same arithmetic expressions can be prevented from increasing, so that the search efficiency becomes extremely high.

FIGS. 8, 9 and 10 are views for explaining a second embodiment of the present invention. FIG. 9 is a diagram for explaining a processing procedure at the time of executing an operation. At the time of execution of the calculation, after calculating the calculation expression, the calculation expression executed is stored in the calculation expression storage buffer 1.
2, the operation result is additionally stored in the operation result buffer 13 and the operation mode is additionally stored in the operation mode buffer 14 to store the operation formulas and the operation results.

FIG. 8 is a view for explaining the procedure of the operation result search processing, and shows the search processing procedure in the old direction. That is, this is processing associated with the operation result search key 2a. First, it is determined in the process 1a whether or not a search for a previously executed arithmetic expression is being performed. When it is determined in the process 1a that the search is not being performed, the process proceeds to the process 2a to determine whether or not it is immediately after the calculation. In the process 2a, when it is determined that it is not immediately after the calculation,
Proceeding to process 3a, the last executed arithmetic expression is called from the arithmetic expression storage buffer 12 to the arithmetic expression input buffer 11,
The operation result and the operation mode corresponding to this expression are called from the operation result buffer 13 and the operation mode buffer 14, respectively. Next, the process proceeds to a process 6a, where an arithmetic expression searching flag is set, the arithmetic result and the arithmetic expression are displayed, and the process ends.
On the other hand, when it is determined in the process 1a that the previously executed arithmetic expression is being searched, or when it is determined in the process 2a that the arithmetic expression has just been calculated, the process proceeds to the process 4a and immediately before the currently displayed expression. Is called from the calculation expression storage buffer 12 to the calculation expression input buffer 11, and the calculation result and calculation mode corresponding to this expression are called from the calculation result buffer 13 and the calculation mode buffer 14, respectively. Next, the processing 6a described above
And exit. In the above-described processing of the operation result search key, in the execution key processing, in the direction of searching for the previous operation expression from the operation expression that last calculated the operation expression stored in the operation expression storage buffer 12, that is, in the old direction. The calculation results are displayed by calling them sequentially.

FIG. 10 shows a search processing procedure in a new direction.
The processing procedure associated with the operation result search key 2b is shown. First, it is determined in the process 7a whether or not the search for the previously executed arithmetic expression is being performed. When it is determined in the process 7a that the search is being performed, the process proceeds to a process 8a, in which the next expression of the expression currently displayed is called from the arithmetic expression storage buffer 12 to the arithmetic expression input buffer 11, and the arithmetic expression is inputted. The operation result corresponding to
The operation mode is called from the operation result buffer 13 and the operation mode buffer 14, respectively. Next, the process proceeds to the process 10a, where the arithmetic expression searching flag is set, the arithmetic result and the arithmetic expression are displayed, and the process ends. On the other hand, if it is determined in the process 7a that the previously executed operation formula is not being searched, the process is terminated.

In the search processing in the new direction using the operation result search key, the results of the operation expression are displayed in order of execution of the operation, from the oldest to the newest. Since the calculation is not executed when the calculation result is called with the calculation result search key, no new calculation expression is registered. Thus, the number of arithmetic expressions does not increase even if the search is performed many times, and the search can be performed efficiently.

FIG. 11 shows an example of key operation of a conventional model, and FIG.
13 shows an example of key operation according to the present invention. In the key operation of the conventional model (see FIG. 11), a procedure for inputting and calculating three equations and then recalling the first calculated result is shown. Here, the operation expression is called by executing the "PB" (playback) key three times, searching for the expression whose result is to be called, and pressing the operation execution key when the target expression is displayed to display the operation result. ing. Therefore, if one wants to know the results of a plurality of equations, the above procedure must be repeated many times.

FIG. 12 shows an example of key operation according to the present invention. Here, as in FIG. 11, a procedure for inputting and calculating three equations and then recalling the first calculated result is shown. Here, the calculation expression is called using the calculation result search key 2, but the result is displayed at the same time as the search, so there is no need to press the calculation execution key 5. Even when the results of a plurality of formulas are called, the operation result is automatically displayed every time the formula is called, so that the operation is easy.

By operating the operation result search key 2, a search can be performed in the direction of the execution of the operation. Therefore, when the target result is passed due to excessive pressing of the key or the like, the operation can be easily performed. You can go back.

FIG. 13 shows an example of key operation when the same function is realized without using a dedicated key such as an operation result search key. In FIG. 13, "-" is used for searching in the old direction.
With the key, the search key in the new direction is realized with the "+" key. As described above, if the existing key is also used as the key for displaying the calculation result, the search for the calculation result can be realized without providing a new key. In this example,
Although the "+" and "-" keys have been used as substitute keys, it is clear that any existing key can be implemented.

[0025]

As described above, according to the present invention,
A small computer capable of storing and calculating an arithmetic expression,
It is possible to provide a small-sized computer capable of easily confirming a result calculated before.

That is, according to the present invention, when an operation expression is called from the operation expression storage buffer to the operation expression input buffer, the operation is executed and the result is automatically displayed. You can call it and redisplay the results. Also, the operation formula is not stored each time it is called, and the storage order of the operation formulas is always stored in the same order, so that the desired operation formula can be called very easily.

Further, according to the present invention, since the operation result and the operation mode are stored at the same time as the operation expression itself, there is no need to recalculate the operation expression. For this reason, it is possible to call the arithmetic expression and its result very quickly. Further, since the order of storing the arithmetic expressions is always kept constant, a desired arithmetic expression can be called very easily.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a small computer according to the present invention.

FIG. 2 is an internal block diagram of the small computer of the present invention.

FIG. 3 is a diagram showing a configuration of a RAM of the small computer according to the present invention.

FIG. 4 is a RAM of another embodiment of the small computer of the present invention.
FIG. 3 is a diagram showing the configuration of FIG.

FIG. 5 is a diagram for explaining a procedure of an operation result search process (search process in an old direction) according to the first embodiment of the present invention;

FIG. 6 is a diagram for explaining a processing procedure at the time of executing an operation according to the first embodiment of the present invention.

FIG. 7 is a diagram illustrating a calculation result search processing procedure (search processing procedure in a new direction) according to the first embodiment of this invention.

FIG. 8 is a diagram illustrating a calculation result search processing procedure (search processing procedure in an old direction) according to the second embodiment of this invention.

FIG. 9 is a diagram for explaining a processing procedure at the time of executing an operation according to the second embodiment of the present invention.

FIG. 10 is a diagram illustrating a calculation result search processing procedure (search processing procedure in a new direction) according to the second embodiment of this invention.

FIG. 11 is a diagram illustrating a conventional key operation example.

FIG. 12 is a diagram illustrating a key operation example of the present invention.

FIG. 13 is a diagram illustrating an operation when a dedicated key is not used in the key operation example of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 display unit 2 operation result search key 3 numeric key 4 operator key 5 operation execution key 6 keyboard 7 display RAM 8 RAM 9 CPU 10 program ROM 11 operation expression input buffer 12 operation expression storage buffer 13 operation result buffer 14 operation mode buffer

Claims (2)

[Claims] 1. An input unit for inputting an arithmetic expression, an arithmetic expression input buffer for temporarily holding an arithmetic expression input by the input unit, and executing an arithmetic operation on the arithmetic expression in the arithmetic expression input buffer An arithmetic unit for sequentially storing arithmetic expressions previously input to the arithmetic expression input buffer; and an operation for sequentially recalling the arithmetic expressions stored in the arithmetic expression storage buffer to the arithmetic expression input buffer A small-sized computer comprising: an expression search unit, wherein the operation unit executes the operation when the operation expression is recalled from the operation expression storage buffer to the operation expression input buffer by the operation expression search unit. Small computer. 2. An input unit for inputting an arithmetic expression, an arithmetic expression input buffer for temporarily holding the arithmetic expression input by the input unit, and executing an arithmetic expression in the arithmetic expression input buffer Arithmetic means for performing the following operations; an arithmetic expression storage buffer for sequentially storing arithmetic expressions previously input to the arithmetic expression input buffer; and a buffer for storing the arithmetic result and the arithmetic mode of each arithmetic expression stored in the arithmetic expression storage buffer. And an arithmetic expression searching means for sequentially calling and displaying the arithmetic expression stored in the arithmetic expression storage buffer, the arithmetic result of the arithmetic expression stored in the buffer, and the arithmetic mode. Electronic computer.