JPS6058510B2 - electronic typewriter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a hyphenation warning system that enables quick and easy right hand margin control in an electronic typewriter with a display device.

As is well known, there are high-end electronic typewriter devices that are equipped with high-performance document editing functions for the purpose of rapid 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. by the way,
Some proposals have been made to equip one of these electronic typewriters with a display device for one line, which automatically prints out a printout when one line has been edited, resulting in low cost and easy operation. In this case, if the right hand margin control associated with character insertion is performed after editing one line, characters can be inserted freely without being bothered by hyphenation warnings. Further improvements in performance and operability are expected. This also applies to electronic typewriters with full-line display devices. The present invention was made in view of the above circumstances, and when characters or sentences are inserted at a specified location in a document in a word processor with a one-line display device, when editing of one line is completed and the cursor moves to the next The purpose is to provide a control method that warns of hyphenation only when the line moves to the line.

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, numeral 10 is a keyboard on which character/numeric keys, function keys, etc. are arranged, and key input information from the keyboard 10 is taken into a control section 30 through a keyboard interface and a 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. memory 4
0 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 key input operation, the control unit 30 reads data from the memory 40 and provides it to the display device 60 through the CRT drive and interface unit 50 for display. or,
The control unit 30 monitors the type of data read from the memory 40 and the data display position of the display device 60, and detects codes such as carriage return (CR) and line feed (LF) as read data. , the data display position is right hand margin (
RHM), the data for 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 to automatically print the data for one line. The memory 40 is connected to the floppy disk device 100 through the floppy disk interface 90, and when tabulation of several lines to one page is completed, which is determined by its storage capacity, the contents of the memory 40 are transferred to the floppy disk device 100. Files transferred to the disk device 100 and stored on the floppy disk 100 are read into 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.

Hereinafter, the basic operation of an electronic typewriter with a one-line display device will be explained in detail as an example of an embodiment of the present invention, and the characteristic operation of the present invention will be explained in relation to this. 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 data is stored in the shaded area.

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 input data is stored, and the Q point is the end code or floating point. Each indicates a memory address where the first data of the data group called from the disk is stored. 301 is an address register indicating the P point address of the memory 40; 302
303 is an address register indicating the Q point address, 303 is an address register indicating the H point address, and 304 is 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; 306 is a display device 60;
This is a display buffer that stores one line of data to be displayed.

307 is the left and right hand margin position, tab set position, hot zone, blinking data display position (not used here), cursor position, margin mask position,
A group of format registers that specify the line tail position, etc., and the bit position of each register is the display buffer 3.
There is a one-to-one correspondence with the character position of 06.

In this format register group 307, each of the above positions is designated by setting the corresponding bit to logic "1". 308 is an address pointer indicating the working address of the display buffer 306 and format register group 307. 309 is an LHM address register that stores the address of the left hand margin (LHM), and 310 is an SP address that stores the address on the memory 40 of the space code (SP) that has entered the hot zone during data transfer to the display device 60. It is a 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, the flip-flop 313 is the space (SP) in the hot zone, and the flip-flop 314 is the hyphen (-) in the hot zone. , 315 is a carriage return (CR
) and 316 respectively indicate the presence or absence of line feed (LF).

A status flip-flop 317 indicates whether the cursor is RHM, and a status flip-flop 318 indicates whether data transferred to the display buffer 306 remains in a predetermined area of the memory 40.

319 is an arithmetic unit that calculates the contents of the address register 301, 319 is an arithmetic unit that increases the contents of the address register 302 by 1, 320 is an arithmetic unit that increases the contents of the address register 304 by 1, and 321 compares the contents of the address registers 301 and 304. 322 is a comparison circuit that compares the contents of the working address register 304 and the space address register 310; 323 is an address pointer 3;
08 and the contents of 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 is a CR from among 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. be.

Reference numeral 328 denotes a printer output control circuit that controls data transfer between the reprint buffer 305 and the printer 80 according to instructions from a print start signal and a print end signal.

329 is an input code determination control circuit that determines the key input code and divides it into data and function code, 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 stores the P point address of the memory 40, similarly, the address register 302 stores the Q point address, and the address register 303 stores the H point address. At this time, display buffer 30
6 stores the contents of the memory 40 after the H point address, which are taken into the display device 60 together with each piece of information in the format register group 307 and displayed on its display screen. Figure 8A shows an example of the format display, where 4 is the left hand margin, ◎ is the right hand margin, (c) is the tab set position, @ is the range of the hot zone, and (e) is the cursor. It represents. Now, when a new input is made from the keyboard 10 and the key input code is determined to be data by the input code determination control circuit 329, the data is stored in the address register 301.
It is written to the P point address of the memory 40 specified by .

Thereafter, the address register 301 is incremented by 1 by the arithmetic unit 319. Along with this key input operation, the display buffer 306 is rewritten.

In this case, first, data transfer preparation processing is executed as follows. That is, the H point address of address register 303 is moved to working address register 304, and the contents of display buffer 306 are cleared. At the same time, the contents of the address register 309 are set in the address pointer 308. Thereafter, the state of the LF display flip-flop 316 is checked, and if it has been reset, registers 4 to 7 of the format register group 307 are cleared, and the state of the flip-flop 316 is checked.
~318 are reset. On the other hand, if the LF display flip-flop 316 is set, data discrimination/
Under the control of the control logic circuit 312, the address pointer 308 is incremented until it detects "1" in the line tail register 7 of the register group 307, and the address pointer 308 is aligned by line feed. , Clear registers 4 to 7 of the format register group 307, and clear the flip-flops 313 to 318 in the same manner as when the LF display flip-flop 316 is reset.
will be reset. This completes the data transfer preparation process, and the contents of the address in the memory 40 specified by the working address register 304 (that is, the contents of the H point address) are read out, and the address pointer 30
The data is written to the display buffer 306 address specified by 8. 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 character, numeric, or symbol data, the address pointer 308 is incremented by 1 to prepare for the next data transfer. In the case of a space code, the state flip-flop 313 is set only when entering the hot zone, and the working address register 304 at that time is set.
The contents of 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 the Haiphong code, the status 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 315 is set regardless of whether it is inside or outside the hot zone. Further, in this case, the address pointer 308 is not incremented. For line feed code, state flip-flop 31
6 and set the address pointer 3 at that time.
66r5 is set in the bit of register 7 in the format register group 307 specified by 08. Address pointer 308 is not incremented. Predetermined processing is similarly performed for other codes. When the margin release key is not pressed, the status flip-flop 317 compares the contents of the address pointer 308 and the RHM address register 311 with the comparison circuit 323, and is set when the two match. On the other hand, when the margin release key is pressed, although not shown in FIG. 2, the setting operation of the state flip-flop 317 is prohibited, and is then set only after a carriage return code or space code, for example, is detected. FIGS. 5 and 6 show these processes in a table. Note that the hot zone area detection described above is performed using the format register group 30.
It is sufficient to access the hot zone designation register 3 in 7 with the address pointer 308 and check whether or not the designated bit is set to ゜゛1゛.

The read signal from this hot zone designation register is
AND is taken individually with the discrimination signal of the data discrimination/control logic circuit 312, and the state flip-flop amplifier 313,
314 set input, and space address register 3
10 data latch signals. As described above, one piece of data is transferred from the memory 40 to the display buffer 306, and if that data is not an end code,
Working address register 304 is incremented by arithmetic unit 320 .

At this time, if all the flip-flops 0313 to 317 remain 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 the sixth
(which has already been updated in the manner shown) is written to the address of display buffer 306 specified by . This data transfer is repeated while state flip-flops 314-317 are reset, and display buffer 306
will be 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, all data transfer from the predetermined area of the memory 40 to the display buffer 306 is completed before the right hand margin is reached, and furthermore, the transferred data does not include codes such as carriage return and line feed. , and even if a Hai Phong code is included, it means that it is outside the hot 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, and the data at the Q point address is read from the memory 40.

If an end code is stored at this Q point address, this end code is sent to the data discrimination/control logic circuit 312.
is detected, the memory 40 is stored until the next key input.
The operation of transferring data from to display buffer 306 is not performed. During this time, the display buffer 306
The contents will continue to be displayed on the 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, the end code is not set until the end code is read out or any of the flip-flops 314 to 317 are set. The data starting from the Q point address continues to be transferred to the display buffer 306 until the Q point address is reached, and then it is ready for the next key input. On the other hand, the comparison circuit 321
The match signal is given to the cursor register 5 of the format register group 307, and the address pointer 30 at that time is
“゜1” is set in the bit specified by 8.

In other words, this indicates the display position of the next key input data. In this way, when the next key input is performed and it is data, the data is stored at the address in the memory 40 specified by the address register 301, and at the same time, the display buffer 306 is rewritten in the same manner as before. is executed again, and the rewritten data is transferred to the display device 60 and displayed. FIG. 8B shows an example of the display. 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. Data input from the keyboard 10 and the rewriting operation of data in the display buffer 306 based on this proceed, and the flip-flops 313 to 316
Suppose that the ball reaches the right hand margin while remaining in the reset state.

In other words, this means that you have reached the right hand margin with no spaces in the hot zone. In this case, the contents of address pointer 308 and RHM address register 311 match, and a match signal is detected from comparison circuit 323. As a result, RHM flip-flop 317 is set, alerting the operator to the hyphenation and halting the device until another key entry is made. On the other hand, RHM flip-flop 317
Even if is set, if the flip-flop 318 is set at this time, the hyphenation warning will not be issued.
A hyphenation warning occurs only after the cursor moves to the next line and flip-flop 318 is reset. This is a characteristic operation of the present invention, but it is only effective when inserting characters or sentences, and a specific example will be described below. Now, as shown in FIG. 9A, assume that data A and B are stored before the P1 address in the memory 40, and data C, Dl, etc. are stored after the Q1 address (
b indicates a space).

In this case, the display on the display device 60 will be as shown in FIG. 9B from the above explanation. Please pay attention to the cursor position here. When a data group It becomes like this.
In other words, the insertion of data group x has been achieved so far. This means that there are no spaces in the hot zone from the previous explanation, and 3 of the flip-flops 313-317
Only No. 17 is set because the display data has reached the RHM position, but during the data transfer from the memory 40 to the display buffer 306, the address registers 301 and 304 match, and the flip-flop 318 is set, so hyphenation warnings are not given. After that, press the character shift key to set the Q point address register 302 to the read address and the P point address register 301 to the write address, as shown in the flowchart of FIG.
Assume that the data from point 1 onward is transferred to point P1 and onward, and the data structure of the memory 40 becomes as shown in FIG. 11A, and the display on the display device 60 becomes as shown in FIG. 11B. That is, this shows a state in which the character shift key is pressed and the P point is incremented by 1 each time data is transferred, and the cursor is shifted to the right in response to this, exceeding the RHM. Only in this state is flip-flop 318 reset and a hyphenation warning issued. Similarly, the insertion of data group x continues, and the cursor moves to RH.
If the number exceeds M, a hyphenation warning will be issued for the first time. Next, the printing operation will be explained.

This is done automatically when any one of flip-flops 314-317 is set and flip-flop 318 is reset, when the apparatus switches to print mode. First, the Haiphong display flip-flop 314
The case where is set will be explained.

From FIG. 5, the flip-flop 314 is set when one line of key input advances to the hot zone and a hyphen is added for a line break. In that case, the contents of that line are immediately printed out, and the display device 60 displays the key input data of the next line. Its operation is as follows. When the set state of the flip-flop 314 is detected, the address register 303 is set again.
The H point address is the working address register 304.
The contents of the address in the memory 40 indicated by the address register 304 are transferred to the reprint 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. after that,
The working address register 304 is incremented by 1 by the arithmetic unit 320 . This working address register 3
The contents of 04 are compared with the contents of the address register 301 by the comparison circuit 321, and data transfer to the print buffer 305 is repeated until the two match. When the address registers 301 and 304 match and the data transfer from the memory 40 to the print buffer 305 is completed, the haiphon detection circuit 324 detects the haiphon ♦ code.

Also, at this time, the flip-flop 314 is in a set state. Therefore, the switching signal D is applied to the 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, in the print buffer 305, a CR code is added to one line of data in the memory 40 from point H to point P (point P is a point that moves each time a new key input is given). Stored. After that, the contents of the working address register 304 at that time are changed to the address register 303.
will be moved to 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 circuits 32 and 6, and as a result, a print start signal is sent from the instruction circuit 326 to the printer output control circuit 3.
28.

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. In this way, when the last data, that is, the CR code is read out from the print buffer 305, the CR code is output to the printer 80 and simultaneously detected by the print end instruction circuit 327, and as a result, the instruction circuit 327 prints the A termination signal is provided to printer output control circuit 328. 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 reprint buffer 305.
During this time, the printer 80 sequentially prints out the data given through the print output control circuit 328, and
When a code is detected, a carriage return operation is performed,
It prepares for the next printing line. That is, once one line of data is transferred from the memory 40 to the print buffer 305, the print operation for one line is performed independently of the display display operation under the control of the print output control circuit 328. It will be destroyed. This is common to all subsequent print operations. Next, state flip-flop 3
The case where 15 or 316 is set will be explained.

In this case as well, 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 transferred to the print buffer 305. After that, the address register 304 is incremented by 1, and the transfer from the memory 40 to the print buffer 305 is repeated in synchronization with the input strobe until the address registers 301 and 304 match, and when they match, the contents of the register 304 at that time are transferred to the address register 303. will be moved to 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 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. . Next, state flip-flop 3
17 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. 8C. In other words, this is the case when the margin release key is not pressed. 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. Its operation is as follows: When the set state of state flip-flops 313 and 317 is detected, the contents of address register 303 are transferred to working address register 304, and the corresponding The contents of the address in the memory 40 indicated by the address register 304 are transferred to the print buffer 305. After that, the working address register 304 is incremented by 1. At this time, the J5th
As is clear from the figure, the space address register 31
0 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 The CR code is added in the same way as when 314 is set. When this CR code is detected by the print start circuit 326, the reprint operation is started. On the other hand, working address register 30
4 is incremented by 1 by the arithmetic unit, and its contents are stored in address register 3.
Newly registered on 03. Therefore, in 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.
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 display buffer 306, the function of discriminating the transfer data, and the function of determining the address pointer 30 based on the discrimination result.
It has the function of advancing 8. The block 601 outputs the input data from the memory 40 as is to the display buffer 306, and at the same time discriminates the data, and is composed of a so-called decoder matrix. The space detected by this decoder matrix 601 (
SP), Haiphong (1), Carriage Return (CR)
), line feed (LF) determination outputs serve as set inputs of state flip-flops 313 to 316 in FIG. 2, respectively, and margin release determination outputs serve as inputs of margin mask register 6 and . Become. 602 is a flip-flop, 603 is a clock pulse generator, 604 is ±1
It is a circuit.

The ±1 circuit 604 is connected to the address pointer 308 in FIG.
8 is +1, and when a backspace (BSP) is detected, it is -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, and during this time, the address pointer 308 continues to advance. 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, which causes the sending of the clock pulse, that is, the address pointer 30
Step 8 stops. At this time, the address pointer 308
will point to the desired tab position. Similarly, when the status flip-flop 316 is set, the clock pulse generator 6
03, ±1 circuit 604 increments the address pointer 308, and stops incrementing when ゜゛1゛ is sent out. That is, this is the process of positioning the address pointer 308 by line feed as described above. Carriage return (CR) with decoder Matrix 601
, line feed (LF), half line feed (H
LF), half reverse line feed (HRLF),
Margin release, ± if end code detected
1 circuit 604 is prohibited from operating. 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 sequence of each part described so far is controlled by a program.

FIG. 3 and FIG. 4 collectively represent the operation flow. As described above, according to the present invention, the right hand margin and foot roll used for inserting characters and sentences are
Since this is done at the end of line editing, you can insert characters and sentences as you like without being bothered by hyphenation warnings every time you insert a character.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the overall configuration of an electronic typewriter targeted by the present invention, FIG. 2 is a diagram showing an embodiment of the control section of FIG. 1, and FIGS. 3 and 4 are diagrams showing the operation of FIG. 2. FIGS. 5 and 6 are functional explanatory diagrams of the data discrimination/control logic circuit in FIG. 2, FIG. 7 is a specific configuration example of the data discrimination/control logic circuit, and FIG. 8 is a flowchart for explaining the process. 1 is a diagram showing an example of a display on a display device. FIGS. 9 to 11 are diagrams showing data structures and display examples of a memory for explaining the characteristic operations of the present invention. 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, 3
11...RHM address register, 312...
...Data discrimination/control logic circuit, 313-318.
...state flip-flop, 319,319,3
20... Arithmetic unit, 321-323... Comparison circuit, 324... Haiphone detection circuit, 32
5... Multiplexer, 326... Print start instruction circuit, 327... Print end instruction circuit, 328... Printer output control circuit, 329...
・Input code judgment control circuit.

Claims (1)

[Claims] 1 A keyboard for inputting data, a printer for printing input data, a display device for displaying input data, a memory for storing input data from the keyboard, and means for instructing insertion of characters; An electronic device characterized by comprising a control circuit that detects the end of a line and issues a hyphenation warning during normal input, and issues a hyphenation warning after editing of the relevant line is completed when a character insertion is instructed. typewriter.