JPS6349469A - Electronic typewriter - Google Patents

Abstract

PURPOSE:To facilitate a table-forming operation, by providing a controlling means for printing input calculation data and calculation result data in response to tab-setting and carriage return commands. CONSTITUTION:A keyboard KB is provided alphanumeric keys alphaN for inputting alphabets A-Z, numerals 0-9, a space and a period, a return key RET, a decimal tab key DTAB, a tab-setting key TAB, a change-over switch SW for change-over between a typing mode and a calculation mode, and arithmetic instruction keys FK. A controlling unit CPU comprises a clock pulse generating circuit, a delay circuit and a gate circuit. A display device DIS displays inputted characters based on a control by display control signals from the controlling unit CPU. A printer PRT prints characters or numerals corresponding to key inputs KBS generated by typing on the keyboard KB, on a printing paper based on a control by printing control signals CPRT from the controlling unit CPU.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an improvement of an electronic typewriter having arithmetic functions regarding printing of calculation result data and input calculation data.

[Conventional technology]

In conventional electronic typewriters equipped with arithmetic functions, when an attempt was made to perform arithmetic operations and print them out, the entire arithmetic process was printed out. That is, input data, calculation symbols, and calculation result data were all printed continuously.

[Problems to be Solved by the Invention] Conventional electronic typewriters are inconvenient when creating a table by printing numerical data in designated locations of input calculation data and calculation result data.

[Means to solve problems (and creation FFfi)]
The present invention includes a tab with a first input means for inputting letters and numbers, a second input means for inputting a carriage return, and a tab for inputting an instruction to switch between typewriter mode and calculation mode. a third input means; and in response to an instruction of the typewriter mode of the third input means, the second
The tab of the input means performs a tab operation and carriage return operation in response to a carriage return instruction, and the tab of the second input means performs a tab operation and a carriage return operation in response to a calculation mode instruction of the third input means. , a control means for printing input calculation data and calculation result data in response to a carriage return instruction, and when the calculation mode is specified, it will not work even if the numeric key is pressed or the calculation command key is pressed. However, when the decimal tab key or carriage return key is pressed, the displayed numerical data is controlled to be printed.

(Example) Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 1 shows an example of the configuration of an electronic typewriter according to the present invention.

Here, KB is the keyboard and the alphabet A
~Z1 Alphanumeric key αN for inputting numbers O to 9, spaces, and periods, return key RET, and decimal tab key DTAB.

A tab set key TAB, a type mode/calculation mode changeover switch SW1, and an operation command key FK are provided.

On the other hand, the CPU is a control unit consisting of a microprocessor or the like, and is configured in the form of a control circuit having a clock pulse generation circuit, a delay circuit, and a gate circuit.

Further, the DIS is a display device consisting of, for example, a dot matrix type liquid crystal display, and the control unit 1-CPU
The input character is displayed based on the control of the display control signal CDl5 from.

In addition, PRT is a printing device, and print control signals CPR from the control unit 1-CPU print characters and numbers corresponding to the keys manually typed in from the keyboard KB.
Printing is performed on the printing paper based on the control of T.

Furthermore, the ROM is a read-only storage device (read-only memory), and the control unit CPU is connected to the printing device PRT.
When supplying control signals to each component device such as the display device DIS, etc., the micro-instruction group required to sequentially notify the control unit CPU of the control procedure shown in FIG. 3 for supplying the control signals is provided. Memorize it in advance.

Further, the RAM is a randomly accessible storage device (random access memory), and stores the operating status of each component device and input character data.

In addition, BUS is a pass line, and the control unit CPU
and transfers memory addresses and data between the two storage devices ROM and RAM.

FIG. 2 shows an example of the contents of control data inputted by key operations on the keyboard KB shown in FIG. 1 and stored in the storage device RAM.

Next, an example of the operation of the electronic typewriter of the present invention shown in FIG. 1 will be explained with reference to the key operation procedure shown in FIG. 2 and the flow chart shown in FIG. When the power switch (not shown) on the keyboard KB is first pressed to turn on the power according to the key operation procedure l shown in FIG. A storage device RA that clears the entire area and stores the position of the print head of the printing device PRT.
After "1" is stored in the head pointer of the memory area in M, in the next judgment step S2, since the TYP mode is entered, the process proceeds to step S3 and the display memory DISP is
Clear. And step S5. In S6, a control loop is executed in which the data in the display memory DISP is displayed on the display device DIS while waiting for a key to be pressed.

Next, in key operation procedure 2 in FIG.
When the key human power signal KBS from the space key of B is input, the control unit CPU determines in determination step S7 in the flowchart of FIG.
Proceed to step 8, determine the mode selector switch S~■, and select TY.
Since it is the P mode, the process advances to step S9, where a space is printed and the value of the head pointer is incremented by +1.

Next, in key operation procedure 3 in FIG.
When the key signals of the space key B (pressed 5 times) are input in sequence, the control unit CPU executes the same control process as in the above-mentioned operation procedure 2, and the contents of the head pointer change as shown in the second figure. 7".

Next, in step 4, when the [key is pressed, step S
7. S14. After S15, the process moves to S16, where head pointer data "7" is stored in the tab memory TBI indicated by head pointer data "O", and the tab pointer is incremented by +1.

Next, in steps 5 and 6, if you press the space key (operate 6 times) [may be pressed], steps 2, 3.
The control unit executes the same control processing as in step 4, and the contents of the head pointer, tab memory, and tab pointer become as shown in the second diagram.

Next, in step 7, if you press the button 2, you will see step S7 in the flowchart shown in the third figure. S14゜S15
．． S17. Step S18 and DISP
Since there is no data to be printed, a carriage return and line feed are executed without printing anything, and then "1" is stored in the head pointer and the tab pointer is cleared.

Next, in step 8, when the mode selector switch is switched to CAL mode and the country key is pressed, step S7. S8. Migrate to SIO,
Here, since the country key was pressed, the process moves to step Sll, and since it is not after the function key, the process moves to step 513, where the data in register R1 is shifted to the left and the input value "1" is stored in the lowest digit. do. Then, the process returns to step 2, but since the CAL mode has been set, the process proceeds to step S4, where the data in register R1 is set to "1".
is transferred to DISP, and step S5. In S6, a display as shown in step 15 of FIG. 2 is made and a key press is awaited.

Next, in step 9, when the keys are pressed in sequence,
The same control as in step 8 is performed, and a display as shown in step 9 in FIG. 2 is performed. Then, “12” is stored in register R1.
3. ” is memorized.

Next, in step 10, when the :o-ra'm key is pressed, step S
7. S14. S15. S17. In step SI9, +1 is added to the tab pointer, and DIS
Since the tab information data stored in the tab TBI indicated by the tab pointer value "B" is "7", the numerical data stored in P is changed to data "I23. ” so that the decimal point is printed in the 7th digit, and the data “123.” is printed. ” is printed.

Next, in step 11, when the key is pressed, step S7. S after S14
The process moves to step S20, where it is determined whether there is data in the operator memory. Since there is no operator memory, the process moves to step S22, and the data "123" in the register R1 is stored.
．． " is transferred to register R2, and the function code corresponding to the pressed function key, for example "4" is transferred.
is stored in the operator memory OP.

Next, if you press 5 and m in steps 12 and 13, respectively, the same control as in steps 8 and 9.10 will be performed, and as shown in FIG.
Print as shown in step 12.13.

Subsequently, when the date key is pressed in step 14, in the flowchart shown in the third figure, the operating memory O is
Since function code "4" is stored in P, the process moves to step S21 and the data "5" in register R1 is stored.
” and the data in register R2”123. ” and the result is “615. " is stored in the register R1. Then, the process advances to step S22, and the data "615." in the register R1 is stored. " is stored in register R2, and the function code "0" corresponding to the pressed function key is stored.
'' is stored in the operator memory OP.

Next, in step 15, press the 3rd round lower key.
The same control as step 10 is carried out, and printing as shown in step 15 in FIG. 2 is performed.

Next, press the RETURN key in step 16.
In the flowchart of FIG. 3, steps S7 to S14
．． The process moves to steps S15, 517, and 518, and in step S18, since there is no data to be printed in the DISP, a carriage return and a line feed are executed, and "1" is stored in the head pointer and "0" is stored in the tab pointer.

(Effects) As is clear from the above description, according to the present invention, even in the calculation mode of an electronic typewriter, the decimal tab key can be used to align the decimal point to the desired position, and only input calculation data and calculation result data can be read. In other words, it is possible to print without an operator symbol, which is effective when manufacturing.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing an example of the schematic configuration of the present invention, Fig. 2 is a line diagram showing an example of the procedure of the key operation, and Fig. 3 is the same (a flowchart showing an example of the control operation by the key operation). Yes. KB・・・・・・・・・・・・・・・・・・Keyboard, αN・・・・・・・・・・・・・・・・・・
...Alpha numeric key, RETURN
・・・・・・Return key, D-TAB・・・・
・・・・・・Decimal tab, TABSet・・・・・・
...Tab set key, FK...
・・・・・・・・・・・・Function key, SW・
・・・・・・・・・・・・・・・・・・・・・・・・
・Mode changeover switch.

Claims (1)

[Claims] A first input means for inputting letters and numbers, a second input means for inputting tabs and carriage returns, and inputting an instruction to switch between typewriter mode and calculation mode. a third input means for performing a tab operation and a carriage return operation in response to a typewriter mode instruction from the third input means and in response to an instruction for the tab and carriage return from the second input means; control means for printing input calculation data and calculation result data in response to a calculation mode instruction from the third input means and in response to an instruction for the tab and carriage return from the second input means; An electronic typewriter with a