JPS6235138B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a display system for a computer or the like that can perform power calculations.

Conventionally, in display devices such as electronic computers, when displaying power calculations, special signals and symbols have been used to display exponents representing the powers of a certain number.

For example, to display the mathematical expression A ² , A
Expressions such as 〓〓2 or AY _X 2 were used.

Also, when displaying A ^B+1 etc. where a formula is input in the exponent part, A 〓 〓 (B + 1) or ^AY
1), etc. were used.

However, the former method requires the use of special signals and symbols, and is difficult to understand because the display format differs from general mathematical expressions.In the latter case, the exponent part is grouped in parentheses, making key operations complicated. However, the disadvantage is that the priority of operations must also be taken into consideration.

The present invention has been made in order to eliminate the drawbacks of the conventional display method involving exponentiation calculations.

Here, one example of the features of the present invention will be summarized as follows.

(1) By displaying the number or formula input to the exponent part indicating the power of a certain number in a power calculation in a lowercase display format, the exponent part can be displayed in the original form of the calculation formula.

(2) Also, it is possible to display the exponent part displayed in lowercase letters with a cursor as shown above.

(3) Furthermore, when the cursor is placed on the exponent part, the exponent input mode is automatically set, and the exponent part can be corrected, corrected, inserted, deleted, etc. by key input without changing the mode. That's true.

Further objects, features and advantages will be explained in detail below in conjunction with the drawings illustrating embodiments of the invention.

FIG. 1 is a diagram for explaining a display form of an example of the display method of the present invention.

In the figure, the cursor left shift key is used to move the cursor to the left when the cursor is displayed. A is the cursor display for areas other than the exponent part, and B is the cursor display for the specified part.

First, at a, the cursor display is the number "3"
If you press the left shift key "〓" when the cursor is on the right side of , the cursor position will move to the number "3". When c and d are pressed in sequence, the cursor position moves to the exponent part at d, and the cursor is displayed in the exponent part. The exponent cursor display B is displayed differently from the other cursor display A, making it extremely easy for the operator to identify it.

In this way, the display method of the present invention does not require the use of special signals or symbols, and can display the exponent part (for example, A ^B+1 , etc.) using an expression method equivalent to mathematical expression. It is.

Also, when correcting, inserting, or deleting a series of input formulas, when the cursor indicating the operation part comes to the exponent part, the cursor display for the exponent part is automatically displayed without changing the mode, and further corrections, insert,
It is configured so that deletion can also be executed without changing the mode. As shown in figure d, when the cursor display RO comes to the exponent position, the cursor display blinks to show that the cursor is present.
The exponent input mode is automatically set, and the exponent part can be corrected, inserted, or deleted by key input without changing the mode.

FIG. 2 shows a block diagram for embodying the display system of the present invention.

In the figure, 1 is a central processing unit (CPU), 2 is a read-only memory (ROM), 3 is an input/output buffer consisting of a read/write memory RAM, 4 is a key input unit,
5 is a display buffer, and 6 is a display body.

The CPU 1 reads key inputs, writes data to be displayed on the display 6 to the display buffer 5, and transfers key input contents to the input/output buffer 3 according to the procedure written in advance in the ROM 2. or display the contents of the input/output buffer 3 on the display 6.
In order to read the input state of the key 4 and display it based on the input, the ROM 2 performs calculations according to the procedure for executing control as shown in the flowchart of FIG. 9, for example, and the contents written in the input/output buffer. The procedure for executing the formula is written in advance.
The input/output buffer 3 is an area for storing calculation formulas input through the keys 4. Key unit 4 is
It is a matrix of strobe signal S from CPU 1 and key signal K. Display buffer 5 is
The data written by CPU1 is displayed on body 6.
Convert and output a signal that matches.

FIG. 3 shows part of the internal registers of the CPU 1. In the figure, flags X ^N , FL and register C have the following meanings, respectively.

X ^N : When this flag is set,
This indicates that the calculator is in the exponent input state.

FL: When this flag is set,
Indicates that some command (numeric value, operator, etc.) has already been written at the cursor position.

C: This register is a pointer that indicates where to display the cursor when displaying the input/output buffer.

Further, as a display used in this display method, for example, a 5×7 dot matrix liquid crystal display as shown in FIG. 4 can be used. In the figure, the letter A and a cursor are displayed from the left digit. The key unit (4 in Figure 2) is equipped with various keys, including numeric, alpha, and symbol keys, as well as ``X <sup>N</sup> '', ``CL'', ``〓'', and ``〓'' keys. provided.

"X ^N ": Key for specifying exponent part input. 1
The second press enters the exponent part input state, and the second press releases the exponent part input state.

"CL": Key to clear the display and reset the CPU internally.

"〓": When the cursor is displayed using the cursor right shift key, move the cursor position to the right side. However, if nothing is displayed at the position before moving, or if there is no display any further to the right, it will not be moved.

"〓": Use the cursor left shift key to move the cursor position to the left side when the cursor is displayed. However, if the cursor position is already at the beginning of the display, it will not move. FIG. 9 is a flow chart for explaining the operation of the block diagram (FIG. 2) of an example of the display system of the present invention.

Note that the display examples shown in FIGS. 5 to 8 will be sequentially explained in accordance with the explanation of the control operation in the flowchart shown in FIG. 9. In the flowchart of FIG. 9, each step ~ executes the following operations.

Step processing operation...Converts the input key into an internal processing code.

...Whether the input key is the "CL" key or not...When the input key is the "CL" key, the input/output buffer is cleared.

...When the input key is the "CL" key, the flag ^XN is reset.

...Resets the flag FL when the input key is the "CL" key.

...Whether or not the input key is the " ^XN " key...If the input key is the " ^XN " key, the flag ^XN is inverted. That is, if X ^N has been reset, it is set, and if it has been set, it is reset.

...Whether flag FL is set or not.
If it is set, proceed to *2.

...Whether or not the input key is the "〓" key...When the input key is the "〓" key, register C is counted up.

...Whether the input key is the "〓" key or not.

...Count down C when the input key is "〓".

...Whether or not the input key contains only uppercase letters.

...Resets ^XN when the input key is a key with only uppercase letters.

...Whether or not flag ^XN is set...When ^XN is set, the internal processing code of the input key is converted to a lowercase internal processing code. This transformation is, for example, the fifth
As shown in the figure, only one bit of the internal processing code is used to distinguish between uppercase and lowercase letters, and other bits may be redundant.

... Put the internal processing code into the input/output buffer.

...Count up C.

...The contents of the input/output buffer specified by C are 0.
(Is it a state where there are no instructions?) No?

...When the content of the input/output buffer specified by C is 0, the flag FL is reset.

...Sets the flag FL when the contents of the input/output buffer specified by C are not 0.

...Whether the contents of the input/output buffer specified by C are in lower case or not.

〓...If the contents of the input/output buffer specified by C are lowercase letters, flag ^XN is set.

...Resets flag X ^N when the contents of the input/output buffer specified by C are not lowercase letters.

=...Whether flag ^XN is set or not.

〓……Whether flag FL is set or not.

〓...When FL is set, the contents of the input/output buffer specified by C are stored inside the CPU.
Save to RAM.

〓...When X ^N is set, put the small cursor's internal processing code into the input/output buffer.

〓...Whether or not FL is set〓...Same as 〓...When ^XN is not set, put the internal processing code of the large cursor into the input/output buffer.

...The contents of the input/output buffer are put into the display buffer and displayed by the display body.

In addition, as an example of the display form of lowercase letters, the 6th
When a 5 x 7 dot matrix display body is used as shown in the figure, a portion of it, for example, a 4 x 5 dot matrix, is used to display lowercase letters.

Further, an example of the cursor display is shown in FIG. a~
d indicates the next cursor display.

a...Large cursor when flag FL is reset.

b...Large cursor when FL is set.

c...Small cursor when FL is reset.

d...Small cursor when FL is set.

Further, when the flag FL is set, as shown in FIG. 8, a counter inside the CPU alternately displays the cursor and the code saved with steps 〓 and 〓 every one second. Figures a and b are examples of a case where a small cursor and a small letter "B" are displayed alternately.

FIG. 10 shows an example of key operations and display when inputting a calculation formula, and this will be explained below along with the flowchart of FIG. 9. The diagram shows A ^2(B+1) +...
This is an example of inputting () and changing this formula to A ^2(B+1)+ .

() A ^{2 (B + 1)} + key input display Step 1 is an example of the display after clearing, and the flag X ^N has been reset. In step 2, "A" is input and a large cursor is displayed in the second digit, and in the flowchart of Fig. 9, step →→→→→→→→→
→〓→〓→ and is executed. In step 3, the "X ^N " key is input, the flag X ^N is set, and a small cursor is displayed. In the flowchart, the steps are →→→→→〓→
Proceed as 〓→〓. For subsequent inputs, enter "X ^N " again.
The exponent part is input until a key is input or a key containing only uppercase letters is input. In step 4, when flag ^XN is set, "2" is input, and a lowercase 2 is displayed. In the flowchart →→→→→
Proceed as →→→→→→→〓→〓→〓. Step 5 is the same as 4, and a lowercase letter () is displayed. Step 6 is the same as 4, and a lowercase letter B is displayed. Step 7 is the same as 4, and a lowercase letter + is displayed. Step 8 is 4
Same as , lowercase 1 is displayed. 9 is 4
Same as , lowercase) is displayed. 10, the flag ^XN is reset by pressing the ^XN key again, and a large cursor is displayed. In the flowchart, the steps are →→→→→〓→〓
11 is the same as 2, and a + is displayed.

() A ^2(B+1)+ . . . and change operation display Here, we will explain the case where the above equation is changed to A ^2(B+1)+ . . .

In step 12, the cursor left shift key is input, and a large cursor and a capital + are displayed alternately. The flowchart is→→→→→
Proceed as →→→→→〓→〓→〓→. In step 13, the flag ^XN is set by inputting the " ^XN " key, and a small cursor and a capital letter + are displayed alternately. In the flow chart →
Proceed as →→→→〓→〓→〓→〓. Step 14 is the same as step 4, and a lowercase + is displayed. A display example shown in FIG. 7 is used for the cursor display. The cursor is displayed in the exponent display area for lowercase letters, and if you enter uppercase letters in the uppercase input mode ( ^reset flag If there is a cursor displayed on the display section, that is, other than the exponent section, if the exponent input mode is set (flag X ^N set), the characters already displayed and the small cursor will blink alternately.

As explained above, according to the display method of a calculator, etc. of the present invention, the exponent part of a power calculation can be displayed in a display format equivalent to a mathematical expression without using any special signals or symbols. When expressed as a mathematical formula, calculations can be performed by giving priority to the exponent part without wrapping it in parentheses.

In addition, when displaying an index, if you set the index input display mode, the cursor will be displayed in a state that indicates the display position of the index, especially in the form of lowercase letters according to the index display, and also in the form of displaying a certain numerical value. Since they are distinguished, the user can very easily identify the format of the input display, which is very convenient when using a computer or the like.

Then, move the above cursor in the input formula, and when the cursor comes to the exponent display position, it will enter the exponent display mode and perform a series of key input operations such as correcting, deleting, and inserting the exponent part. This makes the series of operations easier.

[Brief explanation of the drawing]

Fig. 1 is a diagram showing a display form of an example of a display method for a computer, etc. according to the present invention, Fig. 2 is a block diagram of an example embodying the same method, and Fig. 3 is a diagram showing a part of registers inside a CPU. , FIG. 4 is a diagram showing an example of a display body used in the same method, FIG. 5 is a diagram explaining character code processing conversion, FIGS. 6 to 8 are diagrams showing display examples, and FIG. 9 is a diagram showing an example of the display body used in the same method. FIG. 10 is a flowchart for explaining the operation of , and is a diagram showing an example of key operations and displays when inputting a calculation formula. In the figure, 1... central processing unit, 2... ROM memory, 3... input/output buffer, 4... key input unit, 5... display buffer, 6... display body,
A, B...Cursor display, X ^N ...Exponent part input specification key.

Claims (1)

[Claims] 1. On the display of a calculator or the like that can input a power calculation formula according to the displayed and moved cursor position and execute the input formula, a number indicating a power of a certain number or an exponent of the formula can be displayed. When displaying, a display section is provided which is formed so that the index display can be displayed in a lowercase display format in contrast to the display format in which the certain number is displayed in uppercase letters, and when in the input mode of the index, the cursor A display system for a calculator, etc., comprising means for displaying the index in a smaller size according to the display format for the lowercase letters of the index in order to distinguish it from the display format for the uppercase letters of the certain number. 2. A display method for a calculator, etc. as set forth in claim 1, wherein the means for displaying the cursor is characterized in that when the cursor moves to a position where the exponent is displayed, the cursor becomes an input mode for the exponent part and displays the cursor in a small size. .