JPS628833B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a word processor equipped with a keyboard, display device, printer, and the like.

Prior Art As is well known, CRT is used as a typewriter for the purpose of quick recovery from mistakes and flexibility in editing.
There are high-performance devices that are equipped with a display device such as the above, and allow users to modify and edit documents while looking at the display screen, and record the changes on paper. This is called a word processor. However, the display devices used in conventional word processors display many lines at the same time, making editing easier, but they require a large space to place the large display device, which inevitably results in word·
The processor had become larger. Another important problem was that large display devices are expensive and are not suitable for inexpensive word processors.

A primary object of the present invention is to provide an inexpensive and compact word processor using a compact display device.

Furthermore, specifically, by editing the text line by line while looking at the display on the display device, and printing the text line by line using a printer, it is possible to correct misinputs on the display device. The second objective is to downsize the display device.

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

Overall Configuration FIG. 1 is a block diagram showing an outline of the entire word processor system according to the present invention, in which the display device has a display surface for one line. In the figure, 10 is a keyboard on which character/numeric keys, function keys, etc. are arranged, and the key input information from the keyboard 10 is
The data is taken into the control section 30 through the interface and buffer section 20. The control unit 30 decodes the key input information (code), and if it is a function code, performs corresponding control, and if it is a data code, writes the data code into 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 memory 40
may have a capacity of several lines of print. In parallel with this key input operation, the control unit 30 reads one line of data from the memory 40 and stores it.
1 through the CRT drive and interface section 50
The data is applied to a display device 60 having a display surface for lines, and displayed. At this time, the control unit 30 controls the data display position of the display device 60 according to the type of data read from the memory 40, so that it corresponds one-to-one with the print position of the display printer. Furthermore, the control unit 30 detects codes such as carriage return (CR) and line feed (LF) as read data,
Also, when the data display position enters the 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, automatically starting the one line. Print the minute data. Memory 40 is a floppy disk interface 9
It is connected to the floppy disk device 100 through 0, and for example, several lines to
When tabulation for one page is completed, the contents of the memory 40 are transferred to the floppy disk device 100. In FIG. 1, thick lines indicate data lines, and thin lines indicate control lines.

Embodiment of Control Unit 30 FIG. 2 is a detailed diagram of the control unit 30, and the word processor of the present invention will be explained in more detail hereinafter. In the figure, 40
1 is a memory having a storage capacity of several lines or one page as explained in FIG. 1, and indicates that data is stored in the shaded area. The H point is the memory address where the first data of the next 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 where the end code is stored. Each shows a memory address. 301 is P of the memory 40
Address register indicating point address, 302 is Q
Address register indicating point address, 303 is H
An address register 304 indicating a point address is a working address register during data transfer. A print buffer 305 stores one line of data to be output to the printer 80, and a display buffer 306 stores one line of data to be displayed on the display device 60. 307 is a format that specifies the left and right hand margin positions, tab set position, hot zone, flashing data display position, cursor position (display position of the next data on the display screen), margin mask position, line tail position, etc. In the register group, the bit position of each register is stored in the display buffer 306.
There is a one-to-one correspondence with the character position. Here, the hot zone defines the range of allowable irregularities when aligning the ends of sentences in a document to be printed out, and this refers to whether a line ends at an irregular position in the middle of the next word to be input. , which serves as a guideline. This format register group 3
In 07, each of the above positions is specified by setting the corresponding bit to logic "1". An address pointer 308 indicates 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); 31
0 when transferring data to the display device 60;
This is a space address register that stores the address on memory 40 of the space code that has entered the hot zone. Reference numeral 311 indicates an RHM address register that stores the address of the right hand margin (RHM). 312 is a data discrimination/determination unit that discriminates the type of data transferred from the memory 40 to the display buffer 306 and outputs various control signals.
The control logic circuits 313 to 316 are state flip-flops that are set by the output control signal of the data discrimination/control logic circuit 312, the flip-flop 313 is a space (SP) in the hot zone, the flip-flop 314 is a hyphen (-) in the hot zone, 315 is a carriage return (CR),
316 indicates the presence or absence of a line feed (LF). A status flip-flop 317 indicates whether the cursor is in the RHM, and a status flip-flop 318 indicates whether data to be transferred to the display buffer 306 remains in the memory 40. 319 is address register 301
320 is an arithmetic unit that changes 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; 322 is the working address register 304 and the 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-on detection circuit that detects a hyphen-on code in data transferred to the print buffer 305; 325 is a multiplexer that switches and outputs data from the memory 40 or a CR code from an external source. 326 is a print start instruction circuit that detects the CR code and LF code from the output data of the multiplexer 325 and issues a print start signal; similarly, 327 is a print buffer 305
This is a print end instruction circuit that detects the CR code and LF code from the output data and issues a print end signal. 328 is a print buffer 305 according to instructions of a print start signal and a print end signal.
A printer output control circuit that controls data transfer between the printer 80 and the printer 80 is shown. Reference numeral 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.

Explanation of Operation FIG. 3 shows a flowchart for explaining the operation of FIG. 2. Now, the initial state is memory 40.
It is assumed that the data is contained in the shaded area. As previously explained, address register 30
1 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, the contents of the memory 40 after the H point address are stored in the display buffer 306, and the contents are stored in the format register group 30.
7 is taken into the display device 60 and displayed on its surface. 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 written to the P point address of the memory 40 specified by the address register 301. Then address register 3
01 is incremented by 1 by the arithmetic unit 319. Along with this key input operation, the display buffer 30
6 is rewritten. In this case, first, data transfer preparation processing is executed as follows. That is, the H point address of the address register 303 is transferred to the working address register 304, and the contents of the display buffer 306 are cleared. At the same time, LHM address register 309
The contents of address pointer 308 are set. Thereafter, the state of the LF display flip-flop 316 is checked, and if it has been reset, register 4 of the format register group 307 is checked.
~7 is cleared and flip-flop 313~3
18 is reset. On the other hand, when the LF display flip-flop 316 is set, "1" is set in the line tail register 7 of the register group 307 under the control of the data discrimination/control logic circuit 312.
The address pointer 308 is incremented until the address pointer 308 is detected, and the address pointer is aligned by line feed. Then, as in the case where the LF display flip-flop 316 is reset, register 4 of the format register group 307 is
~7 clear, flipflop 313~318
will be reset. This completes the data transfer preparation process, and the contents of the address of the memory 40 specified by the working address register 304 are read out and written to the address of the display buffer 306 specified by the address pointer 308.

From this memory 40 to the display buffer 30
In parallel with the data transfer to 6, the transferred data is discriminated by the data discrimination/control logic circuit 312,
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. For space code,
Only when the hot zone is entered, the state flip-flop 313 is set, and the contents of the working address register 304 at that time are transferred to the space address register 310. Address pointer 308 is +1 regardless of whether it is inside or outside the hot zone.
be done. In the case of a hyphen code, the status flip-flop 314 is set only when the hot zone is entered. As with the space code, the address pointer 308 is incremented by 1 regardless of whether it is inside or outside the hot zone. 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
At the same time, the bit of register 7 in the format register group 307 designated by the address pointer 308 at that time is set to "1". Address pointer 308 is not incremented.
Predetermined processing is similarly performed for other codes. FIG. 4 and FIG. 5 summarize these processes in a table.

Here, the hot zone area is detected by accessing the hot zone designation register 3 in the format register group 307 using the address pointer 308.
All you have to do is check whether the specified bit is set to "1" or not. The read signal from this hot zone designation register is sent to the data discrimination/control logic circuit 31.
The signal is individually ANDed with the discrimination signal of No. 2, and becomes the set input of state flip-flops 313 and 314, and the data latch signal of space address register 310, respectively. Note that the status flip-flop 317 compares the contents of the address pointer 308 and the RHM address register 311 in a comparison circuit 323, and is set by a match signal from the comparison circuit 323 when the two match.

If the flip-flops 313 to 317 are all in the reset state, when the transfer of one data is completed, the working address register 304 is incremented by 1 by the arithmetic unit 320, and the contents of the next address in the memory 40 specified by the address register 304 are is read out, and this is the address pointer 30
8 (the pointer has already been updated in the manner shown in FIG. 5).
It is written to address 6. While the status flip-flops 314-317 are being reset, this data transfer is repeated until the display buffer 3
06 is rewritten. During this time, comparison circuit 3
21 compares the address registers 301 and 304, and if the contents of the two match, sends out a match signal. This match signal causes the state flip-flop 3 to
18 is set. In other words, all data transfer from the memory 40 to the display buffer 306 is completed before the right hand margin is reached, and the transferred data does not include codes for carriage return, line feed, etc. , even if it contains a hyphen code, it means it is outside the hot zone.

When the state flip-flop 318 is set, the Q point address in the address register 302 is moved to the working address register 304, and
The end code is read from memory 40. This end code is used by the data discrimination/control logic circuit 31.
2 is detected, the operation of transferring data from memory 40 to display buffer 306 is not executed until the next key input is performed. During this time, the contents of the display buffer 306 will continue to be displayed by the display device 60. This is the case when the end code is stored in the memory 40 in advance, but when the end code is not used, the data transfer operation from the memory 40 to the display buffer 306 is stopped due to the setting of the flip-flop 318, and the next Make it possible to respond to key inputs. On the other hand, the match signal of the comparison circuit 321 is also 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 made 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 written in the same manner as before. The change is performed again and
The rewritten data is displayed on the display device 60.
will be forwarded to and displayed. At this time, as is clear from FIG. 5, the character display position of the display device 60 has a one-to-one correspondence with the print position of the printer.

Thereafter, the data input from the keyboard and the data rewriting operation of the display buffer 306 based on this proceed, and the flip-flop 314
317 is set. In this case, the RHM display flip-flop 31
If only 7 is set, it means that the right hand margin has been reached with no spaces in the hot zone, so the operator should be alerted to the hyphenation and the device should be stopped until another keystroke is made. state.
In other cases, the device will switch to print mode and the printing process will be performed automatically as follows.

First, the hyphen display flip-flop 314
The case where is set will be explained. From FIG. 4, the flip-flop 314 is set to 1.
This is the case when the line's key input advances to the hot zone and a hyphen is added to break the line. In this case, the contents of that line are immediately printed out, and the key input data of the next line is displayed on the display device 60. Its operation is as follows. When the set state of the 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 of the memory 40 indicated by the address register 304 are transferred to the multiplexer 32.
5 and is transferred to the print buffer 305.
Writing to the print buffer 305 is performed at the timing of the input strobe. Note that at this time, data transfer to the display buffer 306 is prohibited. Thereafter, the working address register 304 is incremented by 1 by the arithmetic unit 320. The contents of this working address register 304 are determined by the comparator circuit 321 and stored in the address register 304.
1 and the 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 hyphen on detection circuit 32
4 detects a hyphen code. Also, at this time, flip-flop 314 is in the set state.
Therefore, the multiplexer 325 receives the switching signal D
is applied. As a result, multiplexer 325
selects a preset carriage return code (CR code) and prints it to the print buffer 305.
Transfer to. 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). 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, and as a result, a print start signal is provided from the instruction circuit 326 to the printer output control circuit 328. When the printer output control circuit 328 receives the print start signal, it outputs the output strobe signal to the print buffer 3.
05, the data stored in the print buffer 305 is sequentially read out while checking the ready signal of the printer 80, and is output to the printer 80. In this way, when the last data, that is, the CR code, is read from the print buffer 305, the CR code is read out from the print buffer 305.
At the same time as the code is output to the printer 80, it is detected by the print end instruction circuit 327, and as a result,
A print end signal is given from the instruction circuit 327 to the 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.
Data reading of No. 5 is completed. During this time, the printer 80 sequentially prints out the data given through the print output control circuit 328, and when a CR code is detected, performs a carriage return operation and prepares for the next print 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 done. This is common to all print operations described below.

Next, state flip-flop 315 or 316
The case where 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 data 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 It is moved to 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 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, a case will be described in which state flip-flop 317 is set and flip-flop 313 is also set at this time. In this case, the data up to the space closest to the right hand margin (RHM) will be printed out, and the data after that will be newly displayed on the display device. Its operation is as follows. Once the set state of state flip-flops 313 and 317 is detected, address register 303 is activated as before.
The contents of the address in the memory 40 indicated by the address register 304 are transferred to the print buffer 3.
Transferred to 05. After that, the working address register 304 is incremented by 1. At this time, as is clear from FIG.
The address on 0 is stored. 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. address register 3
When 04 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 previous flip-flop 314 is set. The CR code will be added in the same way as when This CR code is sent to the print start instruction circuit 32.
The printing operation starts upon detection at step 6. 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.

Embodiment of Data Discrimination/Control Logic Circuit 312 FIG. 6 shows a specific example of the configuration of the data discrimination/control logic circuit 312. This data discrimination/control logic circuit 312 directly transfers the data read from the memory 40 to the display buffer 3.
06, a function to determine the transfer data, and an address pointer 30 based on the determination result.
It has the function of advancing 8. Block 6
01 outputs the input data from the memory 40 as it is to the display buffer 306, and at the same time,
The part that discriminates the data is a so-called decoder.
Consists of a matrix. The space (SP), hyphen (-), carriage return (CR), and line feed (LF) discrimination outputs detected by this decoder matrix 601 are the set inputs of the state flip-flops 313 to 316 in FIG. Become. 602 is a flip-flop, 603 is a clock pulse generator, and 604 is a ±1 circuit.
The ±1 circuit 604 is the address pointer 30 in FIG.
8 and the decoder matrix 60
When a character, number, or symbol is detected at 1, the address pointer 308 is incremented by +1, and when a back space (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, 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, thereby sending out the clock pulse, that is, the address pointer 308
progress stops. At this time, address pointer 3
08 indicates the target tab position.
Similarly, when state flip-flop 316 is set, clock pulse generator 603, ±1 circuit 60
4 causes the address pointer 308 to increment, and when "1" is sent out, the increment stops. That is, this is the process of positioning the address pointer 308 using the line feed described above. When a carriage return (CR), line feed (LF), half line feed (HLF), half reverse line feed (HRLF), margin release, or end code is detected in the decoder matrix 601, ±1 circuit 604 is detected. Prohibit operation. This is easily understood from the table in FIG.

Note that FIGS. 2 and 6 actually constitute a part of, for example, a microcomputer, and it goes without saying that the operation sequences of the various parts described so far are controlled by a program. FIG. 3 summarizes the operation flow.

Display Example of the Present Invention Next, a display example according to the present embodiment will be described. now,
When the P point address of the memory 40 matches the H point address, bit "1" of the cursor register 5 of the format register group 307 is at LHM. In this case, the display buffer 306 is empty, and the display device 60 displays the LHM and RHM of the format register group 307, the tab set position, the hot zone, etc., and a cursor. Figure 7A shows an example of the display at this time.
1 is the LHM position, 2 is the cursor, 3 is the tab set position, 4 is the hot zone range, 5 is the RHM
This is the position of "A", "B" from the keyboard,
When you type "C", these will appear on the display screen,
Next, when a tab is input, the cursor is shifted to the tab set address and a ``→'' symbol indicating a tab operation is displayed to the right of ``C''. An example of the display at this time is shown in FIG. 7B. Similarly, "A", "B", "C",
An example of the display when "D", "E", and "F" are entered and the carriage return key is then pressed is shown in FIG. 7C. As described above, in this case, the print operation will automatically proceed. FIG. 8 shows changes in the display on the display device when the backspace key is used to combine the prints of ``¥'' to obtain the print ``ABC ¥1000.''

In this way, displays corresponding to the operations of the printer appear sequentially on the display device 60. Further, as the cursor is moved after inputting, for example, the symbols "x space" and "Y" which were not visible at the address of "=" and the space following it become visible in the order of change shown in FIG. 8. Therefore, it has the advantage of being easy to correct. Furthermore, the printing positions of the display and printer correspond one-to-one on the line. For example, in the case of data such as a half-line feed, the address pointer 308 does not move as shown in FIG. If there are two or more pieces of data at the same address, as described above, if the cursor is not at that address, the last data will be displayed, and if you move the cursor from left to right to that position, input will be displayed. According to the order, if you move from right to left, the display will change in the reverse order. FIG. 9 is another display example according to the present invention, showing the relationship between key operations and display changes on the display device when printing "Y=X ² +1". Here, "〓",
"〓" is a display symbol corresponding to a half-reverse line feed and a half-line feed, respectively, and as shown in FIG. 5, these symbols can be erased from the display screen by inputting the following data.
Therefore, the above equation is finally expressed as "Y=X2+1". That is, two-dimensional information, which was originally considered impossible with a one-line display device, can now be displayed one-dimensionally without contradicting the print image of the printer.

Effects of the Invention As is clear from the above description, the following effects are expected according to the present invention.

(1) It is possible to correct misinputs on the display device, and the display device can be made smaller.

(2) Since the printing of each line is automatically started under predetermined conditions, the efficiency of input work is improved.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the overall configuration of a word processor according to the present invention, FIG. 2 is a diagram showing an embodiment of the control section of FIG. 1, and FIG. 3 is a flowchart for explaining the operation of FIG. 2. Chart, Figures 4 and 5
The figure is a functional explanatory diagram of the data discrimination/control logic circuit in Fig. 2, Figure 6 is a concrete configuration example of the data discrimination/control logic circuit, and Figures 7 and 9 are diagrams showing display examples of a display device. be. 10...keyboard, 30...control section, 4
0...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, 313-318...Status flip-flop, 319, 320...Comparison circuit, 324
...Hyphen on 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 a word processor having a key input means for inputting data, a display means for displaying the key input data, and a printing means for printing the data, the line can be changed by inputting a key on a carriage return. a first print start instructing means for instructing the printing means to start printing a line; and a first print start instructing means for instructing the printing means to start printing a line; A second print instructing means for instructing the printing means even if the data has not reached the end of a line, and means for adding a carriage return code after the detected specific key input data, and the printing means A word processor characterized in that the data of the line is sequentially printed by first or second print start instructing means, and when the printing is completed, a carriage return operation is performed to prepare for the next print line.