JPH0764921A - Electronic equipment - Google Patents

Abstract

PURPOSE:To provide an electronic equipment whose operability in numerical conversion is improved. CONSTITUTION:This system is composed of a CPU 3 for executing and controlling the input of keys, arithmetic operations and the display of input information and arithmetic results, a ROM 4 for storing a program for executing and controlling the input of the keys, the arithmetic operations and the display of the input information and the arithmetic results, a RAM 5 composed of an input buffer for storing the input information, a DEC buffer for storing decimal arithmetic results and an HEX buffer for storing hexadecimal arithmetic results, a KEY 6 for inputting information for performing the arithmetic operations and an LCD 7 for displaying the input information and the arithmetic results.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to electronic devices such as calculators, scientific calculators and pocket computers, and more particularly to electronic devices for converting numerical values.

[0002]

2. Description of the Related Art There are two methods for converting a decimal number into a hexadecimal number in a conventional electronic device. One is to perform numerical conversion in response to an operation of a mode change key or the like. That is, the change key is pressed to change the value entered in decimal mode
When the mode is changed to the hexadecimal mode, it is converted into a hexadecimal number. The other is, in hexadecimal mode, define the entered number as a decimal number, perform the operation, and set the result to 1
It is a hexadecimal number.

[0003]

Both of the above methods require a key operation for converting a numerical value, and when performing numerical conversion from a decimal number to a hexadecimal number continuously, it is necessary to change the mode every time. Yes, I needed to define decimal numbers. Furthermore, it was impossible to display decimal numbers and hexadecimal numbers side by side.

[0004]

SUMMARY OF THE INVENTION The present invention has been made for the purpose of solving the above problems. In the invention of claim 1, input means for inputting numerical values and operators in the first mode or the second mode. And an operation execution instruction means for instructing execution of the operation in the first mode or the second mode input by the input means, and in response to the instruction of the operation execution instruction means, the first mode or the second mode. Mode calculation is performed, and the calculation result of the first mode or the second mode is displayed in the second mode.
Executing means for converting into a numerical value of the mode or the first mode,
The display means is provided for distinguishing and displaying the calculation result of the first mode or the second mode and the conversion result of the second mode or the first mode obtained by the execution means on the same screen. Further, in the invention of claim 2, the display means displays the numerical value of the first mode or the second mode in the upper area of the display screen, and the numerical value of the second mode or the first mode in the lower area of the display screen. According to the third aspect of the invention, there is provided a specifying means for specifying each mode by pointing the upper area or the lower area of the display screen with a cursor key.

[0005]

In the present invention, the operation designated by the numerical value and the operator of the first mode or the second mode input by the input means is executed in response to the instruction of the operation execution instruction means, and The calculation result of the 1st mode or the 2nd mode is the 2nd
Mode or the first mode obtained by converting to the numerical value of the first mode
Calculation result of mode or second mode and second mode or first mode
The result of mode conversion is displayed separately on the same screen. Further, the numerical value of the first mode or the second mode is displayed in the upper area of the display screen, and the numerical value of the second mode or the first mode is displayed in the lower area of the display screen. Each mode is specified by pointing the upper area or the lower area of the cursor with the cursor keys.

[0006]

1 is a plan view of an electronic apparatus of the present invention, and FIG. 2 is a system block diagram of the present invention. 3 and 6
Is a diagram showing a display example of the present invention, and FIGS. 4 and 7 are diagrams showing stored contents of the present invention. 5 and 8 are flowcharts of the present invention. The present invention will be described below with reference to the drawings.

In FIG. 1, the electronic apparatus of the present invention comprises a display section 1 and a key input section 2. The key input unit 2 is [A],
[B], [C], [D], [E], [F] and a numerical value input key 2a for inputting a numerical value, and a cursor movement key 2
b, the clear key 2c, [x], [÷], [+],
It comprises an operation instruction key of [-] and an execution key 2d for executing the operation of [=].

In FIG. 2, the system of the present invention executes a key input, a calculation, a display of the input information and the calculation result, and a CPU 3 for executing a key input and a calculation and the display of the input information and the calculation result. A ROM 4 for storing a program for controlling, an input buffer for storing input information, a DEC buffer for storing a decimal operation result, and a RAM 5 including a HEX buffer for storing a hexadecimal operation result, and a RAM 5 for performing an operation KEY to enter information
6 and an LCD 7 for displaying the input information and the calculation result.

The display unit 1, as shown in FIGS. 3 and 4,
"DEC" is displayed on the first line, and "HEX" is displayed on the third line. This is a guidance display. When the up / down movement keys of the cursor movement key 2b are operated, "DE
The reverse display is repeated between "C" and "HEX". For example, if the downward cursor movement key 2b is operated while "DEC" is highlighted, "HEX" is highlighted. Then, when the upward cursor movement key 2b is operated, "DEC" is highlighted. in short,
The cursor movement key 2b is a key for mutually changing the conversion mode between the decimal number and the hexadecimal number, and the reverse display indicates the current conversion mode. In addition, the second line of the display unit 1,
Inputted mathematical expressions and calculation results are displayed on the fourth line. The second line displays decimal numbers, and the fourth line displays hexadecimal numbers. Before inputting, "0" is displayed.

An example of executing the decimal operation "5 × 6" and displaying the operation result will be described with reference to FIGS. 3 and 4. In this case, the conversion mode is the decimal mode because "DEC" is highlighted, and the second line is the input line. Since the input buffer, the DEC buffer, and the HEX buffer in the RAM have been initialized ((a) in FIG. 3), “0” is displayed on the second and fourth lines of the display unit 1 (see FIG. 4 (a)). Key input part 2
When is operated to input “5 × 6”, “5 × 6” is stored in the input buffer ((b) of FIG. 3), and “5 × 6” is displayed on the second line of the display unit 1. ((B) of FIG. 4). In this state, when the “=” key is operated to instruct the execution of the operation, the operation of “5 × 6 = 30” is executed and the decimal operation result “30” is obtained. The obtained decimal arithmetic result "30" is registered in the DEC buffer, while the decimal arithmetic result "30" is converted into hexadecimal, and the conversion result "1E" is registered in the HEX buffer (FIG. 3). (C)). Then, the values of both buffers are displayed on the second and fourth lines, respectively ((c) of FIG. 4). At this time, the second line shows a decimal operation result, and the fourth line shows a value obtained by converting the operation result into a hexadecimal number.

When it is desired to continuously convert the data, it is sufficient to input a mathematical expression and execute the operation, and the clear key 2c.
To operate the input buffer, DEC buffer, and H
It is also possible to clear the EX buffer and return it to the initial state.

An example of executing the hexadecimal operation "A × 2" and displaying the operation result will be described below with reference to FIGS. 6 and 7. From the decimal mode, the cursor movement key 2b in the downward direction is operated to change to the hexadecimal mode. In this case, HEX is highlighted and the fourth line is the input line ((a) of FIG. 6) ((a) of FIG. 7). When the key input unit 2 is operated to input “A × 2”, “A × 2” is stored in the input buffer ((b) of FIG. 6), and “A × 2” is displayed on the fourth line of the display unit 1. Is displayed ((b) in FIG. 7). In this state, when the “=” key is operated to instruct the execution of the operation, the operation of “A × 2 = 14” is executed and the hexadecimal operation result “14” is obtained. The obtained hexadecimal operation result “14” is registered in the HEX buffer, while the hexadecimal operation result “14” is converted into a decimal number and the conversion result “20” is registered in the DEC buffer (FIG. 6). (C)). Then, the values of both buffers are displayed on the second and fourth lines, respectively ((c) of FIG. 7). At this time, the fourth line shows a hexadecimal operation result, and the second line shows a value obtained by converting the operation result into a decimal number.

In the above example, the decimal input information and the operation result are displayed on the second line, and the hexadecimal input information and the operation result are displayed on the fourth line.
The fourth line may be fixed as the conversion line.
In this case, the guidance on the first and third lines also corresponds.

Below, referring to the flow chart of FIG. 5, 1
The processing in the 0-ary number mode will be described. First, the initial state is set (S1). For example, input buffer, DEC
The buffer HEX buffer is cleared, guidance is displayed, and the contents of the DEC buffer and HEX buffer are displayed. Next, wait for key 2 to be operated, then press key 2
When is operated, it is divided into some processes according to the contents of the key. It is determined whether or not the cursor movement key 2b has been operated (S2), and if so (YES), the mode is changed to the hexadecimal mode. If not (NO), the process proceeds to S3, and it is determined whether or not the clear key 2c is operated (S
3) If it is operated (YES), it returns to the initial state. On the other hand, if it is not the clear key 2c (NO), the process proceeds to S4,
It is determined whether or not the [=] key 2d is operated (S4), and the operation is not performed (NO) means that the input key is another key, that is, the numerical value input key 2a or [x],
Since it is the operation instruction key 2d for [÷], [+], [-], the input numerical value and operator are stored in the input buffer (S5), and the contents are displayed on the second line of the display unit 1 ( S6). On the other hand, if the [=] key 2d is operated (YE
S), the formula in the input buffer is calculated, and the calculation result is registered in the DEC buffer (S7). The calculation result is converted into a hexadecimal number, and the conversion result is registered in the HEX buffer (S8). Then, the contents in both buffers are displayed (S9).

Although there is a difference between the decimal number and the hexadecimal number in the flowchart of FIG. 8, the processing is the same as that in FIG.

As described above, the conversion method between the decimal number and the hexadecimal number has been described as an example. However, if the present invention is used, the unit conversion may be performed, in which case the conversion rate may be fixed or settable. Also, reverse conversion is possible.

[0017]

According to the present invention, when a numerical value is input and a calculation is executed, both the calculation result and the conversion result obtained by automatically converting the calculation result are displayed. In addition, when the numerical conversion is continuously performed, it can be executed by the key operation similar to the normal operation. Further, since the display screens are distinguished by the areas in the vertical direction, the mode can be specified by operating the cursor keys.

[Brief description of drawings]

FIG. 1 is a plan view of an electronic device of the present invention.

FIG. 2 is a system block diagram of the present invention.

FIG. 3 is a diagram showing a display example of the present invention.

FIG. 4 is a diagram showing stored contents of the present invention.

FIG. 5 is a flow chart of the present invention.

FIG. 6 is a diagram showing a display example of the present invention.

FIG. 7 is a diagram showing stored contents of the present invention.

FIG. 8 is a flowchart of the present invention.

[Explanation of symbols]

 1 display section 2 key input section 3 CPU 4 ROM 5 RAM 6 KEY 7 LCD

Claims (3)

[Claims] 1. Input means for inputting numerical values and operators in the first mode or second mode, and operation execution instruction for instructing execution of the operation in the first mode or second mode input by the input means. Means for executing the operation in the first mode or the second mode in response to the instruction from the operation execution instruction means, and
Executing means for converting the calculation result of the mode or the second mode into a numerical value of the second mode or the first mode, and the calculation result of the first mode or the second mode obtained by the executing means and the second mode or An electronic device, comprising: a display unit that distinguishes and displays the conversion result of the first mode on the same screen. 2. The display means displays the numerical value of the first mode or the second mode in the upper area of the display screen and the numerical value of the second mode or the first mode in the lower area of the display screen. The electronic device according to claim 1, wherein: 3. The electronic device according to claim 2, further comprising a specifying unit that specifies each mode by pointing an upper area or a lower area of the display screen with a cursor key.