JPS62168217A - Electronic typewriter - Google Patents

Abstract

PURPOSE:To secure the correspondence between the display position of a display device and the print position of a printer by detecting a specific function code and displaying it on a display device. CONSTITUTION:A data deciding control logic circuit 312 reads data out of a memory 40 storing data via the key input, etc. and controls the display of a display device. If the data read into a circuit 3 show the specific function codes for carriage return, line feed, half line feed, half reverse line feed and margin release respectively, these data are displayed on a display device and at the same time an address pointer 308 is not stepped. The following data equivalent to a single character is prevented by a gate G12 since the signal J received from a gate G11 is equal to '0' by the discordance output of a comparator 321 because the pointer 308 is not stepped. Thus said data is not fetched by a display buffer 306 nor displayed on the display device.

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to an electronic typewriter, and more particularly, an electronic typewriter that displays that specific input data such as half line feed, half IJ-purse line feed, and margin release has been input. This article concerns an electronic typewriter.

[Prior art]

BACKGROUND ART Conventionally, there are high-end electronic typewriter devices that are equipped with high-performance document editing functions for the purpose of quick recovery from input errors and flexibility in editing. Usually, this type of electronic typewriter is equipped with a display device such as a CRT, and an operator corrects or edits a document while looking at the display screen.

However, in conventional electronic typewriters, data such as backspace, half line feed, half reverse line feed, margin release, etc. are not displayed on the display screen because they are covered by the following data, which is inconvenient. .

〔the purpose〕

It is an object of the present invention to make it possible to display, when specific input data such as half line feed, half reverse line feed, margin release, etc., is input on a display device. Another object of the present invention is to provide an electronic typewriter that can display the display on a display device and the printing position of the printer in a more corresponding manner.

〔composition〕

Hereinafter, the content of the present invention will be explained in detail with reference to the drawings.

FIG. 1 is a block diagram schematically showing the entire system of an electronic typewriter to which the present invention is applied.

In the figure, 10 is a keyboard on which character/numeric keys, function keys, etc. are arranged.

Key input information from the keyboard is taken into the control section 30 through the keyboard interface and buffer section 20. The control unit 30 decodes the key input information (code), and if it is a function code, performs the corresponding control, and if it is a data code, writes the data code in the memory 40. The memory 40 has a storage capacity for one page of prints, for example. Of course, this is just an example, and the capacity of the memory 40 may be sufficient for several lines to be printed. In parallel with this manual key operation, the control section 30 reads data from the memory 40 and supplies it to the display device 60 through the CRT+W and interface section 50 for display. The control unit 30 also monitors the type of data read out from the memory 40 and the data display position on the display device 60, and detects codes such as carriage return (CR) and line feed (LF) as read data. or when the data display position enters the right hand margin (RHM), the data for that one line is output to the printer 80 through the printer interface section 70, and at the same time a print start signal is issued, and the Prints a line of data. The memory 4o is connected to the floppy disk device 100 through a floppy disk interface 90, and when tabulation of, for example, several lines to one page, which is determined by its storage capacity, is completed, the contents of the memory 40 are transferred to the floppy disk device 100. Also, the files stored on the floppy disk 100 are recalled to the memory 40 as needed. Note that thick lines indicate data lines, and thin lines indicate control lines.

FIG. 2 shows details of the control section 30. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the following, the basic operation of an electronic typewriter with a one-line display device will be described in detail as an embodiment of the present invention, and then the characteristic operation of the present invention will be explained.

In FIG. 2, reference numeral 40 denotes a memory having a storage capacity of several lines or one page as explained in FIG. 1, and the diagonally shaded area indicates data. The H point marked on the memory 40 is the memory address where the first data of the line to be displayed on the display device 60 is stored, the P point is the memory address where the next key manual data is stored, and the Q point is the end code or floppy disk. The memory addresses where the first data of the data group called from etc. are stored are shown. Reference numeral 301 designates an address register indicating a two-point address in the memory 4°, reference numeral 302 an address register indicating a Q-point address, reference numeral 303 an address register indicating an H-point address, and reference numeral 304 a working address register during data transfer. 305 is a print buffer that stores one line of data to be output to the printer 80;
A display buffer 6 stores one line of data displayed on the display device 60. 307 is the left and right hand margin position, tab set position,
A group of format registers that specify the hot zone, blinking data display position (not used here), cursor position, margin mask position, line tail position, etc. The bit position of each register corresponds to the character position of the display buffer 306. It corresponds to 1. In this format register group 307, each of the above positions is designated by setting the corresponding bit to logic 1'1''. 308 is the display buffer 306 and the format register group 30.
This is an address pointer indicating the working address of No. 7.

309 is an LHM address register that stores the address of the left hand margin (LHM), and 310 stores the address on the memory 40 of the space code (sp) that has entered the Hola 1-zone when data is transferred to the display device 60. This is the SPP point address register. Reference numeral 311 indicates an RHM address register that stores the address of the right hand margin (RHM). 312 is a data discrimination/control logic circuit that discriminates the type of data transferred from the memory 40 to the display buffer 306 and outputs various control signals. 313 to 316 are state flip-flops set by the output control signal of the data discrimination/control logic circuit 312;
is a Haiphong (-) in the hot zone, 315 is a carriage turn (CR), and 316 is a line feed (L F
) respectively. 317 is cursor R
Status flip-flop indicating whether or not in HM, 318
is a status flip-flop indicating whether data to be transferred to display buffer 306 remains in a predetermined area of memory 40. 319 is an arithmetic unit that calculates the contents of the address register 301.

319' is an arithmetic unit that increments the contents of the address register 302 by 1, 320 is an arithmetic unit that increments the contents of the address register 304 by 1, 321 is a comparison circuit that compares the contents of the address registers 301 and 304, and 322 is a working address register: 304 and space address register 310
323 is a comparison circuit that compares the contents of the address pointer 308 and the RHM address register 311.

324 is a hyphen detection circuit that detects a hyphen code in the data transferred to the print buffer 305, and 325 is a multiplexer that switches and outputs data from the memory 40 or a CR code from the outside. 326 detects the CR code and LF code from the output data of the multiplexer 325.

Similarly, 327 is a print end instruction circuit that detects the CR code and LF code from the output data of the print buffer 305 and issues a print end signal. Reference numeral 328 denotes a printer output control circuit that controls data transfer between the print buffer 305 and the printer 80 according to instructions from a print start signal and a print end signal. 329 determines the key manual code and divides it into data and function code,
The input code determination control circuit transfers the data to the memory 40 and outputs the function code to a desired location of the device as a control signal.

FIGS. 3 and 4 show flowcharts for explaining the operation of FIG. 2. Now, assume that the memory 40 contains data in the shaded area as an initial state. As previously explained, the address register 301 contains the P of the memory 40.
Similarly, the address register 30
2 is the Q point address, address register 303 is H.
Each point address is stored. At this time, the contents of the memory 40 starting from the I-I point address are stored in the display buffer 306, which is taken into the display device 60 along with each piece of information in the format register group 307, and displayed on its display screen. ing. FIG. 8(A) shows an example of a format display, where ■ represents a left hand margin, O represents a right hand margin, O represents a tab set position, e represents a hot zone range, and ■ represents a cursor.

Now, when a new input is made from the keyboard 10 and the key manual code is determined to be data by the input code determination control circuit 329, the data is transferred to the address register 3.
It is written to the P point address of the memory 40 specified by 0.1. After that, the address register 301 is transferred to the arithmetic unit 319.
+1 is added.

Along with this key manual operation, the display buffer 3
06 is rewritten. In this case, first, the data transfer Y(li preparation process) is executed as follows. That is, the H address of the address register 30;3 is moved to the working address register 304, and the contents of the display buffer 306 are rearranged. At the same time, the contents of the LHM address register 309 become the address pointer 308.
is set to After that, LF display flip-flop 3
16 is checked, and if it is reset, registers 4-7 of format register group 307 are cleared and flip-flops 313-318 are reset. On the other hand, when the LF display flip-flop 316 is set, the data discrimination/control logic circuit 31
2, the address pointer 308 remains in the line tail register 7 of the register group 307 until the address pointer 1n is detected.
is incremented, the address pointer 308 is aligned by line feed, and then, as in the case where the LF display flip-flop 316 is reset, registers 4 to 7 of the format register group 307 are cleared, and the flip-flop 313 to 318 are reset. This completes the data transfer preparation process, and the memory 4 specified by the working address register 304 is
Contents of address 0 (i.e. content of H point address)
is read out and passes through gate G□2 (normally gate G□2
is written to the address of display buffer 306 specified by address pointer 308 (which is in the on state).

In parallel with this data transfer from memory 40 to display buffer 306, the transferred data is discriminated by data discrimination/control logic circuit 312, and the following processing is performed depending on the type. That is, if the data is characters, numbers, or symbols, the address pointer 308 is incremented by 1 to prepare for the first data transfer. In the case of a space code, the state flip-flop 313 is set only when entering the hot zone, and the contents of the working address register 304 at that time are transferred to the space address register 310. The address pointer 308 is incremented by 1 regardless of whether it is inside or outside the hot zone. In the case of a Haiphong code, the state flip-flop 314 is set only when the hot zone is entered. The address pointer 308 is incremented by 1 regardless of whether it is inside or outside the hot zone, as in the case of the space code. In the case of a carriage return code, the status flip-flop 15 is set regardless of whether it is inside or outside the hot zone. Further, in this case, the address pointer 308 is not incremented. In the case of a line feed code, when the status flip-flop 316 is set, "1" is set in the bit of register 7 in the format register group 307 specified by the address pointer 308 at that time.

Address pointer 308 is not incremented. Predetermined processing is similarly performed for other codes. Status flip-flop 317 connects address pointer 308 and RHM if the margin release key is not pressed.
The contents of the address register 311 are compared by a comparison circuit 323, and if the two match, it is set. On the other hand, when the margin release key is pressed, although not shown in FIG. 2, the setting operation of the flip-flop 317 in this state is prohibited.
After that, it is set only after a carriage return code or space code, for example, is detected.

FIGS. 5 and 6 show these processes in a table.

The hot zone area can be detected by accessing the hot zone designation register 3 in the format register group 307 using the address point and ink 308, and checking whether the designated bit is set to "1". The read signal from this hot zone designation register is used for data discrimination and
It is individually ANDed with the determination signal of the control logic circuit 312, and becomes the data latch signal of the state flip-flops 313 and 314, and the data latch signal of the space address register 310, respectively.

As described above, one piece of data is transferred from the memory 40 to the display buffer 306, and if the data is not an end code, the working address register 306
04 is incremented by 1 by the arithmetic unit 320. At this time, if the flip-flops 313 to 317 are all still in the reset state, the contents of the next address in the memory 40 specified by the address register 304 are read out, and this is transferred to the address pointer 308 (the pointer is shown in FIG. display buffer 30 specified by
Written to address 6. state flip-flop 31
4 to 317 during reset.

This data transfer is repeated until the display buffer 3
06 is rewritten. During this time, the comparison circuit 321 compares the address registers 301 and 304, and if the contents of the two match, it sends out a match signal. This match signal sets state flip-flop 318. In other words, this is write bang 1 (all data transfer from the area up to point P in memory 4Q to display buffer 306 is completed before reaching the margin, and there are codes such as carriage return and line feed in the transferred data. If it is not included, and even if the Haiphong code is included, it means that it is outside the Ho-Zone.

When the state flip-flop 318 is set, the Q point address in the address register 302 is transferred to the working address register 304.

Data at the Q point address is read from the memory 40. If the end code is stored at this Q point address,
When the data discrimination/control logic circuit 312 detects this end code, no data transfer operation from the memory 40 to the display buffer 306 is performed until the next keystroke is performed.

During this time, the contents of display buffer 306 will continue to be displayed by display device [60]. This is a case where the end code is stored in the memory 40 in advance, but if the Q point address of the memory 40 is not the end code, then the end code is read out or one of the flip-flops 314 to 317 is stored. The data from the Q point address onwards is continued to be transferred to the display buffer 306 until the Q point address is set, and then it is ready for the next key input.

On the other hand, the match signal from the comparison circuit 321 is also given to the cursor register 5 of the format register group 307, and the bit specified by the address pointer 308 at that time is set to '1'.
is erected. In other words, this indicates the display position of the next key input data. When the next key input is performed as shown in the figure below, and it is data, the data is stored at the address in the memory 40 specified by the address register 301. At the same time, as before, the display buffer 306
The rewriting is executed again, and the rewritten data is transferred to the display device 60 and displayed. Figure 8 (B
) is shown in the display example. Note that this is an example where the end code is stored at the Q point address. A display example when normal data is stored after the Q point address will be described later in connection with the characteristic operation of the present invention.

Assume that the data input from the keyboard 10 and the rewriting operation of the data in the display buffer 306 based on this progress, and the flip-flops 313 to 316 reach the right hand margin position while remaining in the reset state.

In other words, this means that he has reached the right hand margin with no spaces in the Hola 1-zone. In this case, address pointer 308 and RI-IM
The contents of the address register 311 match, and the comparison circuit 32
A coincidence signal is detected from 3. As a result, RHM flip-flop 317 is set, alerting the operator to the hyphenation and shutting down the machine until another keystroke is applied. Note that the RHM flip-flop 317 is reset when the flip-flops 313 to 316 are reset before the printout of one line (described later) is executed and the data of the first line is transferred from the memory 40 to the display buffer 306. This is done together with the reset.

Next, I will explain about print) 1st 1st work. This is automatically performed when any one of flip-flops 314 to 317 is set and flip-flop 318 is reset, when the apparatus switches to print mode.

First, a case where the Haiphong display flip-flop 314 is set will be described. From FIG. 5, the flip-flop 314 is set when the key power of one line advances to the hot zone and a hyphen is added for administration. In this case, the content of that line is printed out in its entirety, and the key manual data of the next line is displayed on the display device 60. Its operation is as follows. When the set state of flip-flop 314 is detected.

The H point address of the address register 303 is transferred to the working address register 304 again, and the contents of the address in the memory 40 indicated by the address register 304 are transferred to the print buffer 305 through the multiplexer 324. This writing to the print buffer 305 is performed at the timing of the input strobe. Note that data transfer to the display buffer 306 is prohibited in this print mode. Thereafter, the working address register 304 is incremented by 1 by the arithmetic unit 320.

The contents of this working address register 304 are compared with the contents of the address register 301 by a comparison circuit 321, and the contents of the print buffer 304 are
Data transfer to is repeated.

Address registers 301 and 304 match, and memory 40
When data transfer from the print buffer 305 to the print buffer 305 is completed, the Haiphon detection circuit 324 has detected the Haiphon code. Also, at this time, the flip-flop 314
is in the set state.

Therefore, a switching signal is applied to multiplexer 325. As a result, multiplexer 325 selects a preset carriage return code (CR code) and transfers it to print buffer 305. In other words, the print buffer 305 stores data from point H to point P (
A CR code is added to one line of data up to point P, which is a point that moves each time a new key is applied, and is stored. Thereafter, the contents of the working address register 304 at that time are transferred to the address register 303. That is, a new H point address is registered.

On the other hand, the CR code selected by the multiplexer 325 and transferred to the print buffer 305 is detected by the print start instruction circuit 326.
A print start signal is given to the plink output control circuit 328 from the print start signal. When the printer output control circuit 328 receives the print start signal, it issues an output strobe signal to the print buffer 305, reads the data stored in the print buffer 305 sequentially while checking the ready signal of the printer 80, and outputs the data to the printer 80. When the last data, that is, the CR code, is read out from the print buffer 305 in this way, the CR code is output to the printer 80 and simultaneously detected by the print end instruction circuit 327.
As a result, the printer output control circuit 328 receives printer 1 to end signals from the instruction circuit 327 . Upon receiving this print end signal, the printer output control circuit 328 stops the output strobe to the print buffer 305, thereby completing reading data from the print buffer 305. During this time, the printer 80 sequentially prints out the data supplied to the printer 1 through the output control circuit 328, and when a CR code is detected, performs a carriage return operation to prepare for the next print line. In other words, one line of data is transferred from the memory 40 to the print buffer 3.
05, the print operation for one line is then performed under the control of the print output control circuit 328, independently of the display display operation. This is common to all subsequent print operations.

Next, the case where the state flip-flop 315 or 316 is set will be explained. In this case as well, address register 3
The contents of 03 are moved to the working address register 304, and the memory 40 indicated by the address register 304 is
The contents of the address are transferred to the printer 1-buffer 305. After that, the address register 304 is incremented by 1, and the memory 4 is incremented by 1 until the address registers 301 and 304 match.
The transfer from 0 to the print buffer 305 is repeated in synchronization with the input strobe, and when a match occurs, the contents of the register 304 at that time are transferred to the address register 303.

These operations are the same as when state flip-flop 314 is set.

The print operation is started when the CR code or LF code read from the memory 40 passes through the N multiplexer 325 as it is, is detected by the print start instruction circuit 326, and a print start signal is issued to the printer output control circuit 328. Ru.

Next, a case will be described in which the state flip-flop 317 is set and the flip-flop 313 is also set at this time. An example of the display at this time is shown in FIG. 8(C). In other words, this is the case when the margin release key is not pressed, and in this case, the data up to the space closest to the right hand margin (RHM) is printed out, and the data after that is newly displayed on the display device. will be done. Its operation is as follows.

When the set state of the state flip-flops 313 and 317 is detected, the contents of the address register 303 are transferred to the working address register 304, and the contents of the address in the memory 40 indicated by the address register 304 are printed, as before. It is transferred to buffer 305. After that, the working address register 304 is incremented by 1. At this time, as is clear from FIG. 4, the space address register 310 stores the address on the memory 40 of the space closest to the RHM. When the working address register 304 is incremented by 1, its contents are compared with the contents of the space address register 310 by a comparison circuit 322, and data transfer from the memory 40 to the print buffer 305 is repeated until the two match.

When the address registers 304 and 310 match, a match signal is output from the comparison circuit 322, and the data transfer to the space closest to the RHM is completed. At this time, the match signal E switches the multiplexer 325, and 314 is set, CR
Code will be added. When this CR code is detected by the print start circuit 326, the print operation is started. On the other hand, the working address register 304 is incremented by 1 by the arithmetic unit 320, and its contents are newly registered in the address register 303. Therefore,
In the subsequent data transfer to the display buffer 306, the next data in the space closest to the RHM is read out, and the display buffer 306 is rewritten.

The above is the basic operation of an electronic typewriter with a one-line display device as an embodiment of the present invention.
As is clear from the table in Figure 6, backspace, half line feed, half river/sline feed,
Data such as margin release is displayed in display buffer 3.
Even if the address pointer 308 is transferred to 06, the address pointer 308 is not incremented by 1, so these data are replaced with the next data,
It is not displayed on the display device 60. The present invention solves this inconvenience, and in FIG. 2, the gate G11
．． This is the configuration that Q-engine 2 is characterized by. In 2N, data display of margin release will be explained as an example.

Now, the already created file is called from the floppy disk, and the data structure in the memory 40 at a certain point is 9th.
Assume that it is diagram (A). (φ indicates margin release data, b indicates caspase data). In this case, based on the explanation in N, the display on the display device is shown in FIG. 9 (B
)become that way.

At this point, when you press the character shift key on the keyboard, the contents of the 0-point address register 302 become the read address 1, the contents of the 2-point address register 301 become the write address, and the memory 40 01 point data “Q pt is moved to point P□,
After that, the contents of both address registers 301 and 302 are +
1 will be given. In other words, this means that the cursor has moved one place to the right. From now on, repeat the same operation and store memory 4.
Suppose that the data structure of 0 changes as shown in FIG. 10(A). FIG. 10(A) shows a state where the margin release data ψ is at the Q1 point address, that is, the cursor ray is placed vertically. In this state, in the process of transferring data from the memory 40 to the display buffer 306, at the timing when the margin release data φ is transferred, the output of the cursor register 5 of the register group 307 is tt I
J+, similarly the output of the comparison circuit 321 is also II 1.11
Therefore, the output J of gate G41 is II I 11
Therefore, the gate G□2 is turned on, and the margin release data φ is directly transferred to the N display buffer 306. At the timing of the next data it hI+, the output of the cursor register 5 is still "1" (because the previous data is a margin release and the pointer 308 is not incremented by 1), whereas the output of the comparison circuit 321 is "0". ”, the output J of 61□ is “0”, so the gate G12 is turned off, and the transfer of data 11 hI+ to the display buffer 306 is prohibited. From then on, the gate G2 is turned on as usual. In other words, the display on the display device 60 is the 10th
As shown in Figure (B), the margin release code φ is displayed with priority over the character data h.

In other words, the margin release data φ is character data “
t" and character data "h", and when 1'e" is input next to character data "h", character data 11 indicates that margin release data φ has been input. It is displayed not between tII and character data "h" but between character data "t'' and character data II e17.

FIG. 7 shows a specific example of the configuration of the data discrimination/control logic circuit 312. As described above, the data discrimination/control logic circuit 312 has the function of directly transferring the data read from the memory 40 to the transfer buffer 306, the function of discriminating the transferred data, and the function of determining the address pointer 308 based on the discrimination result. It has the function of advancing.

Block 601 is a section that outputs input data from memory 40 as is to N display buffer 306 and at the same time discriminates the data, and is comprised of a so-called decoder matrix. Space (sp) detected in this decoder matrix 601.

The discrimination outputs of hyphen (-), carriage return (CR), and line feed (LF) are set inputs of the state flip-flops 313 to 316 in FIG. It becomes input.

602 is a flip-flop, 603 is a clock pulse generator, and 604 is a ±1 circuit. ±1 circuit 604 is the second
It is connected to the address pointer 308 in the figure, and when a character, number, or symbol is detected in the decoder matrix 601, the address pointer 308 is incremented by 1, and when a backspace (BSP) is detected, it is incremented by 1. Note that the strobe signal is issued every time one data transfer is performed, and the above-mentioned +1 or -1 is executed at the timing of generation of the strobe signal. When a tab is detected in decoder matrix 601, flip-flop 602 is set. As a result, the clock output of the clock pulse generator 603 is applied to the ±1 circuit 604, and during this time, the address pointer 308 continues to increment. When the address pointer 308 advances and "1" is sent out from the tab register 2 of the format register group 307, the flip-flop 602 is reset to 1-, thereby causing the clock pulse to be sent out, that is, the address pointer 308 stops advancing. Stop. At this time, the address pointer 308 points to the target tab position. 1. If the state flip-flop 316 is set as il, line tail registers 7 to 11 of the format register group 307
clock pulse generator 603, until a 1'' is sent out.
The address pointer 3080 is incremented by the ±1 circuit 604, and the increment is stopped when "1" is sent out. Namely.

This is the process of positioning the address pointer 308 by line feed as described above. The decoder matrix 601 performs carriage return (CR), line feed (LF), half line feed (HLF), etc.
Half Reverse Line Feed (HRLF), Margin Release, ±1 circuit if end code is detected 6
04 operation is prohibited. This is easily understood from the table in FIG.

2 and 7 actually constitute a part of a microcomputer, for example, and it goes without saying that the operation sequences of the various parts described above are controlled by a program.

FIG. 3 and FIG. 4 collectively represent the operation flow.

〔effect〕

As described above, according to the present invention, it is possible to display on the display that specific input data such as half line feed, half reverse line feed, margin release, etc. has been input in an electronic typewriter with a display. , it becomes possible to display data subsequent to character data input next to specific input data in correspondence with the printing position of the printer, and the operability of this type of electronic typewriter can be further improved.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the overall configuration of an electronic typewriter to which the present invention is applied, FIG. 2 is a diagram showing an embodiment of the control section in FIG. 1, and FIGS. A flowchart for explaining the operation, FIGS. 5 and 6 are functional explanatory diagrams of the data discrimination/control logic circuit in FIG. 2, and FIG. 7 is a diagram showing a specific configuration example of the data discrimination/control logic circuit. Figure 8 is a diagram showing an example of display on a display device, Figure 9 and Figure 1.
FIG. 0 is a diagram showing a memory structure and display example for explaining the characteristic operation of the present invention. DESCRIPTION OF SYMBOLS 10... Keyboard, 30... Control unit, 40... Memory, 60... Display device, 80... Printer, 100... Floppy disk, 301-304... Memory address register,
305...Print buffer, 306...Display buffer, 307...Format register group, 308...Address pointer. 309... LHM address register, 310... Space address register, 311... RHM address register, 312... Data discrimination/control logic circuit, 3
13-318...state flip-flop, 319.3
20... Arithmetic unit, 321-323... Comparison circuit, 324... Haiphone detection circuit, 325... Multiplexer. 326...Print start instruction circuit, 327...Print end instruction circuit, 328...Printer output control circuit, 329...Input code determination control circuit.

Claims (1)

[Claims] (1) In an electronic typewriter that has a keyboard for inputting data, a printer for printing the input data, a display for displaying the input data, and a memory for storing the input data from the keyboard, a half line feed, half reverse line feed,
Specific input data such as margin release is input between the first character data and the second character data, and
When third character data is input with respect to character data, it is determined that the input of the specific input data is not between the first character data and the second character data, but between the third character data and the second character data. An electronic typewriter characterized in that the electronic typewriter is displayed between the first character data and the third character data.