JPS6058509B2 - electronic typewriter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a margin control method that allows the operator to take appropriate action when hyphenating and obtain good alignment in an electronic typewriter equipped with a display device. It is.

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 printing it out while looking at the display screen. Conventionally, in such electronic typewriters, various methods have been proposed for aligning the endings of printed documents.

Among these methods, a typical method is to use a so-called hot zone, and according to this method, it is possible to obtain good end-of-sentence alignment with almost no intervention by the operator. Briefly, the operator determines the range of acceptable irregularities by specifying the size of the hot zone. If the operator does not input a carriage return, if a space or a hyphen is input beyond the right hand margin, the carriage return is performed at the position of the space within the hot zone closest to the right hand margin. If there is no space in the hot zone, for example, the space closest to the right hand margin is forced to be in the hot zone. Although this method has the advantage of not requiring operator intervention, it is inevitable that the end of the sentence will be somewhat unnaturally aligned. Another method is to issue a hyphenation warning in such a case, and when the operator moves the cursor and inserts a hyphen at an appropriate location, a carriage return is performed at the hyphen. However, even with such a system having a hyphen insertion mode, it is not possible to print out, for example, the remainder of a word that has been hyphenated beyond the right hand margin on that line. The present invention has been developed in view of the above circumstances, and has a margin release function, which enables data to be input beyond the right hand margin or left hand margin, and also allows data to be entered beyond the margin, such as when the first space Alternatively, it is an object of the present invention to provide a margin control method that automatically causes a carriage return with a specific code such as a haiphon. Hereinafter, the content of the present invention will be explained in detail with reference to the drawings.

FIG. 1 shows a schematic configuration of the entire system of an electronic typewriter to which the present invention is applied.

In the figure, reference numeral 10 denotes a keyboard on which alphanumeric keys, function keys, etc. are arranged. Key input information from the keyboard 10 is taken into the control section 30 through the keyboard interface and the buffer section 20. The control unit 30 decodes the key input information (code), and if it is a function, performs corresponding control, and if it is data, writes the corresponding data into the memory 40. The memory 40 has a storage capacity for, for example, one page of prints. 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 section 30 reads out one line of data from the memory 40 and supplies it to the display device 60 through the CRT drive and interface section 50 for display. The control unit 30 also monitors the type of data read from the memory 40 and the data display position of the display device 60, and monitors the carriage return (CR) as read data.
, line feed (LT), etc., and the data display position is right hander. Jin (RHM)
When the data for one line is entered, the data for one line is outputted to the printer 80 through the printer interface section 70, and at the same time, a print start signal is issued, and the data for one line is automatically printed. Memory 40 is a flexible disk interface. Floppy disk device 10 through Ace 90
0, and the contents of the memory 40 are transferred to the floppy disk device 100 when the work for several lines to one page is completed, depending on the stored contents. Additionally, the keyboard 10 is equipped with a margin release key.
When the cursor (mark indicating the display position of the next input data) on the display surface of the display device 60 is on the RHM, pressing the margin release key cancels the margin (that is, the RHM mark on the display surface is masked). ),
It is now possible to input data beyond the RHM.
In the present invention, this margin release function is set,
If data is input beyond the RHM, a cartridge return is automatically performed at the first space or hyphen after the RHM, and the print operation is started. An embodiment of the control section 30 shown in FIG. 1 is shown in FIG.

Hereinafter, the content of the present invention will be explained in connection with an explanation of the overall operation of an electronic typewriter with a one-line display and device as an example. 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 display device 6
Point P indicates the memory address where the first data of the line displayed at 0 is stored, point P indicates the memory address where the next key input data is stored, and point Q indicates the memory address where the end code is stored. 301 is an address register indicating the P point address of the memory 40, 302 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 the 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 the 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 theory 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).

317 is a status flip-flop indicating whether the cursor is at RI (M); 318 is a display buffer 306;
This is a status flip-flop indicating whether data to be transferred to the memory 40 remains in the memory 40 or not.

319 is an arithmetic unit that calculates the contents of the address register 301, 320 is an arithmetic unit that increases 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 a space. A comparison circuit that compares the contents of the address register 310, 323 is an address pointer 308
This is a comparison circuit that compares the contents of the RHM address register 311 and the RHM address register 311.

324 is a Haiphong detection circuit that detects a Haiphong 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 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.

FIG. 3 shows a flowchart 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 7A shows an example of a format display, where 4 represents the left hand margin, @ represents the right hand margin, (c) represents the tab set position, ○ represents the range of the hot zone, and (e) represents the cursor. There is. 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 LHM address register 309 are set in address pointer 308. Thereafter, the state of the LF display flip-flop 316 is checked, and if it has been reset, the format register group 307
registers 4 to 7 are cleared, and the flip-flop 31
3 to 318 are reset. On the other hand, when the LF display flip-flop 316 is set, the register group 307 is controlled by the data discrimination/control logic circuit 312.
The address pointer 308 is incremented until it detects "1" in the Linedale register 7", the address pointer 308 is aligned by line feed, and then the LF display flip-flop 316 is reset. Similarly, registers 4 to 7 of the format register group 307 are cleared, and flip-flops 313 to 31 are cleared.
8 reset is performed. This completes the data transfer preparation process, and the contents of the address in the memory 40 specified by the working address register 304 (i.e., H
The contents of the point address) are read out and the address pointer 3
The data is written to the display buffer 306 address specified by 08. 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.
4'r1 is set to the bit of register 7 in the format register group 307 specified by 08, and the address pointer 308 is not incremented. Regarding other codes,
Predetermined processing is performed in the same manner. 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, the setting operation of this state flip-flop 317 is prohibited, and is then set only after the haiphon code and space code are detected. FIGS. 4 and 5 show these processes in a table. Note that in order to detect the hot zone area, access the hot zone designation register 3 in the format register group 307 using the address pointer 308, and set 4 to the designated bit.
All you have to do is check whether 6r゛ has passed or not.

The read signal from the hot zone designation register is individually ANDed with the discrimination signal of the data discrimination/control logic circuit 312, and the state flip-flops 313 and 3 are respectively ANDed.
14 set inputs, and space address register 31
It becomes a data latch signal of 0. 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 304 is incremented by 1 by the arithmetic unit 320.

At this time, if all the flip-flops 313 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 shown in FIG. is written to the address of the display buffer 306 specified by (which has already been updated in the manner shown in FIG. While the state flip-flops 314 to 317 are being reset, this data transfer is repeated and the display buffer 306 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 means that all data transfer from the memory 40 to the display buffer 306 is completed before the right hand margin is reached.
Moreover, the transferred data does not include codes such as carriage return and line feed, and even if it includes a Haiphong code, it means that it is outside the hot zone. When the state flip-flop 318 is set, the Q of the address register 302 is set.
The point address is moved to the working address register 304, and the end code is read from the memory 40.

When the data discrimination/control logic circuit 312 detects this end code, the operation of transferring data from the memory 40 to the display buffer 306 is not executed until the next key input is performed. During this time, the contents of display buffer 306 will continue to be displayed by display device 60. This is the case where the end code is stored in the memo 1J40 in advance, but if 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 All you have to do is make it compatible with key inputs. On the other hand, the match signal from the comparison circuit 321 is also applied 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゛. 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. 7B shows an example of the display. Assume that the data input from the keyboard 10 and the rewriting operation of the data in the display buffer 306 based on the data input proceed, 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 you have reached the right hand margin with no spaces in the hot zone. In this case, the contents of the address pointer 308 and the RHM address register 311 match, and a match signal is detected from the comparison circuit 323 on the output line 11. At this time, if margin release is not set, andGade Gl2,
RHM flip-flop 31 through or gate Gl4
7 is set, alerting the operator to hyphenation and stopping the device until another key entry is made. On the other hand, assume that the margin release key on the keyboard 10 is pressed when the cursor is at the right hand margin position. In this case, the margin release code is stored in the memory 40 as before and transferred to the display buffer 306, but at this time, the data discrimination/control logic circuit 312 indicates that the transferred data is a margin release code. "6r' is set in the bit indicated by the address pointer 308 (indicating the RHM position) of the margin mask register 6 in the format register group 307. As a result, the AND gate GlO is activated by the inverter gate Gll. is inhibited, and the margin mark on the display surface of the display device 60 is erased.At the same time, the activation of the AND gate Gl2 is also inhibited by the inverter gate Gll, and the RHM flip-flop 317 remains reset.
Data can still be input using the keyboard 10. FIGS. 8A to 8C show display examples when the margin release key is pressed, where J.phi.Y shows the margin release display and RzJ shows the input data after the margin release key is pressed. Data is input beyond the above-mentioned right hand margin, and the contents of address pointer 308 are set to RH.
When it becomes larger than that of the M address register 311, the comparator circuit 322 sends out a “゜1゛” signal to the output line 12.

Therefore, when the space key is pressed thereafter, the AND gate Gl3 is activated, the RHM flip-flop 317 is set for the first time, and the OR gate Gl5 is activated.
The flip-flop 318 is set. Similarly, when the haiphon key is pressed, RHM flip-flop 317 and status flip-flop 314 are set. When this flip-flop 313 or 314 is set, the data stored in the display buffer 306 up to that point will be transferred from the memory 40 to the print buffer 305 and printed out, but the details will be explained in the next print operation. I'll leave it to you to explain. In addition,
The RHM flip-flop 317 is reset when one line of printout is executed and the next line of data is transferred from the memory 40 to the display buffer 306.
Prior to this operation, flip-flops 313 to 316 are reset together. Next, the printing operation will be explained. This is done automatically when any one of the flip-flops 314 to 317 is set, and the apparatus switches to print mode. First, the case where the high-phone display flip-flop 314 is set will be explained.

As shown in FIG. 4, the flip-flop 314 is set when one line of key input reaches the hot zone and a hyphen is added for a line break, or when the margin release is too long and data is input beyond RHM. This is the case when a hyphen is added for the first time to break a line. In this 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 H point address of the address register 303 is transferred to the working address register 304 again.
The contents of the memory 40 address indicated by 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. The contents of the working address register 304 are compared with the contents of the address register 301 by a 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, 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 input is given, and is stored. After that, the contents of the working address register 304 at that time are transferred 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 circuit 326, and as a result, a print start signal is sent from the instruction circuit 326 to the print output control circuit 305.
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 output strobe to the print buffer 305, thereby completing data reading from the reprint buffer 305.During this time, the printer 80
Print out the data given through C
When the R code is detected, a carriage return operation is performed to prepare for the next printing line. That is, the memory 40
When data for one line is transferred to the print buffer 305, the print operation for one line is thereafter performed under the control of the print output control circuit 328, independently of the 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, 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. 7C. 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. It turns out. 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, as before;
The contents of the memory 40 address indicated by 04 are transferred to the print 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. Working address register 3
When 04 is incremented by 1, its contents are compared with the contents of the space address register 310 by a comparison circuit 322, and the contents are transferred from the memory 40 to the print buffer 30 until they match.
Data transfer to 5 is repeated. 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 3
The CR code is added in the same way as when 14 is set. And this CR code is print start circuit 3
The reprint operation is started upon detection at 26. On the other hand, the working address register 304 is incremented by 1 by the arithmetic unit, and its contents are added to the address register 303.
will be newly registered. 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. The same is true when the margin release key is pressed and data is input beyond the RHM, and then the flip-flops 313 and 317 are set by a space code. FIG. 6 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. Block 601 is a section that outputs input data from memory 40 as is to display buffer 306 and at the same time discriminates the data, and is comprised of a so-called decoder matrix. The space (S
P), Haiphong (-), Carriage Return (CR)
, line feed (LF) are set inputs to the state flip-flops 313 to 316 in FIG. 2, and the margin release determination output is input to the margin mask register 6. 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 3 in FIG.
08, 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. This applies the clock output signal to the clock pulse generator 603, and during this period, the address pointer 308 continues to advance. When the address pointer 308 advances and "1" is sent from the tab register 2 of the format register group 307, the flip-flop 602 is reset, thereby stopping the sending of the clock pulse, that is, the advancing of the address pointer 308. .At this time, address pointer 3
08 indicates the target tab position. Similarly, if state flip-flop 316 is set,
The address pointer 30 is controlled by the clock pulse generator 603 and the ±1 circuit 604 until "1" is sent from the line tail register 7 of the format register group 307.
8 is incremented, and when "1" is sent out, the increment stops. In other words, this is the process of positioning the address pointer 308 by line feed as explained earlier. Return (CR
), line feed (LF), half line feed (
HLF') 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 6 actually constitute a part of a microcomputer, for example, 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. As described above, according to the present invention, data can be input beyond the margin, and the operator can effectively align the ends of sentences.

[Brief explanation of the drawing]

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 of Fig. 1, and Fig. 3 explains the operation of Fig. 2. FIG. 4 and FIG. 5 are functional explanatory diagrams of the data discrimination/control logic circuit in FIG. 2. FIG. 6 is a specific configuration example of the data discrimination/control logic circuit, and FIGS. 7 and 8 FIG. 2 is a diagram showing an example of a display on a display device. 10...keyboard, 30...control unit, 40...memory, 60...display device, 80...printer, 100...
...Flotspie disc, 301-304...
・Memory address register, 305...Print buffer, 306...Display buffer, 307
...Format register group, 308...Address pointer, 309...Address register,
310...Space address register, 311
...RHM address register, 312...
・Data discrimination/control logic circuit, 313 to 318...
... State flip-flop, 319-320... Arithmetic unit, 321-323... Comparison circuit, 324.
... Haiphone detection circuit, 325 ... Multiplexer, 326 ... Print start instruction circuit, 32
7...Print end instruction circuit, 328...
-Printer output control circuit, 329... Input code determination control circuit.

Claims (1)

[Claims] 1. A keyboard for inputting data, a splinter for printing input data, a margin release means operated by an operator, and a margin release means for releasing the margin when the margin release means is instructed to release the margin. and a control circuit that automatically generates a carriage return signal when a specific code is detected in the input data. lighter. 2. The electronic typewriter according to claim 1, wherein the specific code is a space code or a Haiphong code.