DE2825519A1 - ELECTRONIC DISPLAY DEVICE FOR MULTI-LINE TEXT REPLAY - Google Patents

Description

-A-

Applicant: International Business Machines

Corporation, Armonk, N.Y. 10504

bu / bm
Electronic output device for multi-cell text display

The invention relates to an arrangement as can be found in the preamble of claim 1.

With modern word processing systems, the operating personnel Text data as it is entered can be reproduced for processing purposes, in particular editing can; this can be done, for example, by displaying data. So in many cases the text is written using a keyboard similar to a typewriter, keyed in to display the keyed characters accordingly on a screen To bring a report. When the keyboard entry is finished, you can check beforehand, e.g. for reproduction by printing, whether the entry was made correctly; instead of reproduction by printing, reproduction via a remote Screen or a transfer to a storage unit to be carried out. If the text is processed, then the Text brought to the screen for display, so that using the keyboard for the input of instruction commands and text information the text by inserting additional Information or deletion of special information or conversion and the like can be processed. To facilitate the To operate or to increase productivity, it may be useful if the text is on a word-for-word basis rather than on a character-on-character basis. Anyway, it could be extremely beneficial if the through the operation to be entered carriage return commands or line jump commands completely switched off or to a minimum could be reduced.

The most varied of efforts have been made in the past to improve the operation for word processing

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to facilitate output, especially for the line ending operations necessary steps, e.g. automatic operation. However, the solutions proposed for this are relatively complicated and accordingly time-consuming.

For example, US Pat. No. 3,631,957 shows an arrangement in which a comparison is made in a first comparator by means of a word space signal between a line length counter counting from the beginning of the line and the preset edge value of an edge limit register corresponding to the right edge. If the result of the comparison shows that the count of the line length counter is less than or equal to the preset margin value, then a word space register is activated when triggered by the word space signal. If, on the other hand, the comparison result shows that the count of the line length counter is greater than the preset edge value, a second comparison process is triggered in which the count corresponding to the last word space is compared with the preset internal value of an edge zone internal value register corresponding to the left edge of the edge zone. If, in response to this, the second comparison result gives an edge zone inner value less than the count value of the last word space, then a line back tsLiif signal is triggered, while otherwise a decision signal for a word separation is output. Apart from the fact that the separation decision achieved hereby does not take into account grammatical rules without further ado, so that the reading of the text is made more difficult for the reader in this case, the said counter is also not used for word processing operations that go beyond this is not set up.

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U.S. Patent 3,688,275 shows a formatted text display system that uses special end-of-line characters in front of the words that have been identified as the cause of the margin overrun. One the address The special register containing the last word space in a display line is used to determine whether the end-of-line character is to be used in each case, in order then, if necessary, to reproduce the relevant word first To bring the word into the next line that follows.

In the arrangement of US Pat. No. 3,550,091, a counter is used to determine the last word space in a display line to be able to capture. When the character rendering reaches the right edge of a rendering line, words become brought to input both in the current display line and in the next following display line. Will then subsequently If a word gap is detected before the right edge is reached, the word display is then displayed in the next one Playback line deleted. In contrast to this, before reaching the right edge of the display line, the the relevant playback line is deleted in the form of the remainder of the last word entered, then the playback takes place relevant word as a whole in the respective following display line.

In both of the latter cases, there is no simple counter control for processing connected words instead a single letter control, which the latter is relatively more complicated for a correct reproduction of the text Measures are required to avoid characters or letters that cannot be displayed for the corresponding transmission to suppress.

The arrangement described in German Offenlegungsschrift 2613850 also falls into essentially the same category.

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The object of the invention is, in addition to processing individual characters to provide word-for-word processing of text to be displayed in order to provide an easily readable text display to provide without disruptive side effects with little effort.

According to the invention, this object is achieved, as is the case with the identifier of claim 1 can be found. Thanks to the use of a word limit counter according to the invention, is it not only possible to delete a word, but also to provide an underline operation. In this case, both on a character-by-character basis on a word-for-word basis. In this case, return line commands that are separated by the operator are advantageous must be specified, not required. The operator only needs to enter the text in an advantageous manner to be, in which case the word processing system according to the invention automatically has boundary conditions must be taken into account.

Advantageous refinements and developments of the invention can be found in the subclaims.

The invention will then be described on the basis of an exemplary embodiment explained in more detail with the help of the drawings listed below.

;Show it:

1 shows a diagram for a word processing system,

* Fig. 2 is a block diagram to show a preferred one Embodiment of the invention,

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3 shows the format for a command word,
4 shows the format for a text word,

Fig. 5 is a diagram for illustrating the operation
a left margin intermediate register,

Fig. 6 diagrams to explain the operational sequence

A through C measured the invention in boundary crossing operations.

The word processing system of Figure 1 includes a keyboard
1, with the help of which text or operational commands can be entered
and a data display device 2, which is used for text reproduction when entering and revising text, such as editing,
is appropriate. This word processor is about a
Cable 4 connected to a control unit 3. Other data display devices and keyboards, but not shown here
can also be connected to the control unit 3. A printer 5 and a memory 6 are connected to this control unit as further reproduction units, which are used for recording
of the text displayed on the screen
Bind The memory of the text can then meet for retrieval at a later time ^. The one here
Stored text can contain standardized paragraphs, etc. that are grouped together into individual letters. If desired, the control unit 3 can also be connected to an auxiliary computer 7 to be, which is advantageous, for example, when electronic;

Remote transmission of text pages should take place. j

ba the control unit 3, the printer 5, the memory unit 6, and the auxiliary computer 7 is not directly for understanding the j Invention contribute, should not go into this further! Will. '

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- Q -

The keyboard 1 contains a number of character keys, with the help of which alphabetic and numeric characters, as well Key in other symbols manually. The character keys can be arranged like a conventional typewriter be. Furthermore, pushbuttons 9 are arranged separately therefrom, which are used for entering operational commands or from Operational symbols are used. For example, the pushbuttons for triggering word deletion, word underlining, character deletion, Position marker indicator shift, tab setting, Use left and right margin setting.

As indicated above, the text to be reproduced is displayed on the screen 2. To facilitate operation also a left edge display symbol 10, a right edge display symbol 11, one to indicate the various positions of the characters Serving scale 12 on which tab settings are normally to be displayed and a position marker indicator 13 used to indicate the point of interest in each case. A text is still entered on screen 2, whose words "underscored" and "or", which are entered in the third and fourth display line, so that this The margin is exceeded, but are deleted for display, and then in the fourth or fifth line of display to be displayed. The operations resulting from the margin overrun are detailed below described.

With a conventional data display device, up to 192Ο Reaching 24 lines of display, up to 80 character positions own, display on the screen. Each display line of the screen contains 9 raster scan lines, the JEur character representation is resolved in a 7 χ 9-dot matrix is. It should be emphasized, however, that although a preferred embodiment of the invention is based on such a Classification is described, other systems can just as easily be used. In all cases, however, it is 977 OO4 8Ö9883 / 0662

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It is necessary that a buffer memory is available in which the characters contained therein to be displayed cyclically can be scanned.

In the block diagram according to FIG. 2, the data to be displayed are transmitted via line 4 together with any data that may be present Operation orders added. The interface 15 then converts the series data into parallel data before they are transmitted to the decoders 16 via line arrangement 17, the function of which is described in detail below. In any case, the characters to be displayed are via the line arrangement 18 transferred to the buffer memory 19, the is made up of cyclic shift registers and 192O Contains memory locations corresponding to the 1920 character positions to be displayed on the screen. The buffer storage is scanned cyclically, a line of characters representing a line of text in each case in the line buffer 20 is composed of 80 characters. In this way, the line buffer contains 2O consecutive Data lines to be displayed on the screen. However, before this data can be displayed, it must be used for video information are decoded, including this line buffer 2O with a character generator 21 present in the form of a read-only memory connected is. The visual data are transmitted from the read-only memory 21 via line arrangement 22 to the screen. Am Buffer address register 23 contains the screen address of the character concerned. The buffer address register 23 is divided into two parts, of which the first part 23A is the character count for identifying the character position within the display line on the screen and the second part 23B contains the line count for display of the respective playback line on the screen. In the present exemplary embodiment, the first part 23A consists of a seven-stage register and the second part 23B from a five-stage register. A conflict

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As will be described in detail below, cache register 24 is used during insert and delete operations. The data stream transmitted from the buffer memory 19 via the line arrangement 25 can be transmitted again via an OR gate 26 write into the buffer memory 19 and that if necessary after a delay by the intermediate register 24 under appropriate control of the control network 27, as it is for Revision operations of the text to be displayed may be necessary under certain circumstances.

The interface 15 is also connected to a keyboard input and, via output line 17, to the input of the Decoder 16. As already mentioned, the input of the interface 15 is via line arrangement 4 with the control unit 3 (Fig. 1) connected. The part of the circuit arrangement shown in FIG. 2 described so far is in itself already known. Deviations and modifications as required to carry out the operations according to the invention are now described in detail below.

The characters appearing in the data stream can be divided into three categories, namely text characters that are used for display !, format characters for word delimitation, such as spaces, as well as required line returns, and , other format characters that cannot be categorized under word limitation:: Format characters can or can also cannot be displayed. A space represents a format mark , which is usually used to break words. jRequired line return represents a format character that forces a line to end in the text, even if there is still enough space for other words in this rendering line !should. The latter character can be brought to the display in order to 'operate during the execution of text editing functions to facilitate. A zero is a format character that differs from the space

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in that it means a character position on the screen that can be overwritten with another character without that this causes the subsequent characters to be shifted to the right. A short-term left margin mark is used to define a temporary left text margin; it can also be displayed during a revise operation for ease of use. Other Format characters that are not described here because they are not contribute to the understanding of the invention, represent e.g. "new paragraph", "space", "tab", "new-paragraph-tab", as well as attribute characters for "protection / non-protection" and "display / not display". A word is usually as a result defined by text characters that have one or more immediately preceding and following delimiter marks. However, non-delimiting format characters are treated as single-character words with no delimiting marks in front have to go or follow.

Within the interface 15 and the decoder 16, are; the characters are encoded as 13-bit bytes. This then applies to: Characters to be displayed, format characters and other operational I command characters from the control unit. In contrast to this' Are characters within the buffer memory 19 as 8-bit bytes coded. The eighth bit in each byte is used to indicate whether the character is to be underlined. Is that eighth Bit is set in a byte, then the character is caused. a different section in the character generator 21 address so that the underlined character version then becomes the j Display arrives. As an alternative to this, other circuit arrangements (not shown here) can of course also be used. to underline the character by using! corresponding bits together with the ι forming the character Bit stream to be transmitted to the screen. The purpose of this is the diel line arrangement 42 in FIG. 2.

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The word limit counter 31, which follows the individual words in the data stream, represents an essential part of the invention. If a boundary mark, distance or
Line return decoded, then a latch 32 is set to set up the word limit counter 31. When the next text character occurs, the
Line and character counts are taken from the buffer memory address register 23 and in parallel via line arrangements 33 and 34 into the sections 31A and 31B of the word limit counter 31
transmitted, so that the respective content of the word limit counter 31 always points to the beginning of the word of the data stream words.

It should be emphasized at this point that it can only be left to an appropriate choice whether the word limit counter 31 is based on the first character of a word or the
the respective character position which immediately precedes the respective first word character. If a non-delimiting format is decoded - defined above as a one-character word - then the word delimitation counter 31 is loaded with the line and character counts of the buffer address register 23 that occur in each case. During each scan of the buffer memory 19, the word limit counter normally does not indicate the beginning of a word in the data stream occurring on the line arrangement 25. As explained in detail further below, the formal loading of the word limit counter 31 is blocked in the case of a word operation, such as, for example, border crossing, word deletion or word underlining, and the respective count content is retained. Section 35A of the word delimitation counter 31 can then be incremented like a normal counter under the control of the control network 27 via line 32 until the word processing in question has been completed. A hold control unit 41 is used for
Prevention of the setting of the latch circuit 32
via line 43, so that the respective count
in the word limit counter 31 during a word overflow operation, a word erase operation or a word undercut;

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operation is held. A signal appears on line 43 whenever decoder 28 detects a delimiter.

The character decoder 28 checks the data stream transmitted from the buffer memory 19 to the line arrangement 25. Becomes a Short-term left margin characters are detected, then the address of the corresponding temporary left-hand text margin is recorded in the short-term left margin register 29 set. The signals decoded by the character decoder 28 are also transferred to the Control switching network 27 transmitted.

The short-term left margin register 29 is set when a short-term left margin character is operated in the character position is entered where the temporary left text margin should begin, or if a short-term left margin character is to be used during the Buffer scan is detected. The short-term left margin operation is terminated by a return line character.

The right edge register 36 contains the address of the right text edge. In the present embodiment, at In the absence of a special operation command, this corresponds to the right edge of the display area. A corresponding one The value can be entered into the right edge register 36 either by an operation command from the control unit 3 (FIG. 1), or by operating the keyboard 1 (Fig. 2) accordingly. The characters entered to the right of the right text margin must Be zeros; otherwise they are moved to the next playback line.

jComparators 37, 38 and 39, allow the contents to be compared the word limit counter 31 and the buffer address register 23 with each other, furthermore the value of the column or character count in the buffer memory address register with the content i

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of the right edge register 36 or the column or character count in the word limit counter 31 with the content of the right edge register 36. The buffer memory address register contains the address of the relevant character in the buffer memory 19, so that the comparator 37 indicates the switching network 27 whenever the sampling of the buffer memory 19 den Has reached the beginning of a word. Comparator 38 indicates to switching circuit 27 when the buffer memory scan is on the right edge of the text and comparator 39 shows when the first character of the word is on the right Edge is located. Comparator 40 compares that in the short term left margin register 29 with the character count in the buffer address register 23; in other words: Comparator 40 indicates when the character count has reached the right edge of the text.

The operation of the arrangement according to the invention will now be described described in detail. It is assumed that the screen is initially completely free and that a document is available for Should be displayed. As mentioned, the right edge of the text can either be through the control unit 3 (Fig. 1) or through set the keyboard 1 (Fig. 2). Is the operation command for setting the right text margin in the decoder 16 is received, then the right edge register is loaded 36 bits of an 8-bit byte, that of the column position of the right text margin.

the left edge of the text can either be set using the control unit 3 or the keyboard. Suppose that a temporary left edge is set on the part of the operator via the keyboard 1 by pressing the left edge key is actuated, at the same time the position marker indicator in the resulting character J position gets on the screen. As a result, the temporary left margin register character is put into the buffer memory 19 is entered so that when the memory is scanned

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and after decoding via decoder 28, this character position is entered into the short-term left-margin register 29.

All other character positions are padded with zeros. The position marker indicator is in the top display line, immediately to the right of the character position of the left text margin. By pressing the appropriate Keys of the keyboard 1, the desired text can then be entered into the apparatus together with the format characters.

The left margin setting can be described with reference to FIG. The text characters are used along with the circled space characters 47 to indicate they are on the screen are not visible, entered in the first display line. As can be seen from Fig. 5, the second to fourth display lines, so that for this purpose the position marker indicator on the part of the operator is moved into column 05, then the short-term left-hand key to press on keyboard 1. The short-term left margin address is set in the short-term left margin register 29 transferred from the character count part 23A of the buffer address register, a short term left margin register icon 46 is displayed on the screen. It should be emphasized that during the key actuation of the buffer memory 19 is continuously scanned will. The character positions in front of the short-term left margin symbol 46 are padded with zeros 48, which are also circled to indicate that they cannot be displayed. The text will then correspond to the second Text display line entered in the second display line. When entering the text in the third display line, the value set in the short-term left margin register 29 ensures that the text character is again in column 05 is placed according to the set left text margin.

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The same process is repeated when entering text in the
fourth line of display, with the exception, however, that
This means that the temporarily set left text margin is canceled by the operation. To do this, press the return line key when the cursor is in column 12. As a result, the return line character 44 is displayed and the contents of the temporary left margin register 29 are cleared. As a result, in the fifth line of display, the first text character in
■ Column 01 is displayed.

The short-term left margin operation can also be used to identify paragraphs. So can the first eight
Characters in the sixth line of reproduction represent the heading of a paragraph. The short-term left-hand key is actuated when the position marker indicator is in column 09
and then enter the text. As can be seen, _is: the indented in the seventh and eighth display lines to be brought to display text on the columns 01-08, which are .entsprechend filled with zeros 48th To cancel the short time left margin setting, the
'Return-line key pressed when the position marker indicator is in column 15. The text to be entered in the ninth display line then begins again with column ¹ OI. In the illustration according to FIG. 5, the position marker indicator 45 is placed in column 04 in order to indicate that the character position of the next character, irrespective of whether text or format characters, is to be entered.

^: When the text shown in Fig. 5 is printed out,
'The characters located in the second and sixth display lines to the right' of the short-term left-hand margin character 46 are all shifted by one character position to the left. This is for
'Compensation for the short-term left margin symbol that is displayed but not printed out.

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Every time a short-term left margin mark is made during a Buffer memory scan is detected, its address is entered into the temporary left margin register 29 via character decoder 28 entered. The comparator 40 compares the contents of the temporary left margin register 29 with the character count im Buffer memory address register 23, so that the time is controlled at which an overflow character from the holding register 24 into the new display line is to be inserted.

The operational sequence should now be carried out when the margin is exceeded with the aid of the representations in FIGS. 6A to 6C explained will. In these representations, the words "WORD SPIL" should be entered at the end of a display line. With appropriate operation, the characters W, 0, R, D, 47, - are also shown here again circled to make them invisible to indicate - S, P, I, L and L in that order entered, but without paying attention to the return of the characters. As can be seen from the illustration according to FIG. 6A results, the right text margin is set to column 80. If the space character 47 in column 73 by the character decoder 28 is decoded during the buffer scan following its entry, then the word limit counter 31 prepared by means of the locking circuit 32 and after decoding the character W, the content of the Buffer address register 23 in the word limit counter 31, corresponding to column 74, entered. When the next Space character 47 is decoded in column 78, then the word limit counter 31 is again prepared and the Beginning of the next word, namely the character S, entered in column 79 of the display line. Usually the Word delimiter counter 31 set whenever a word delimiter character in buffer memory 19 is scanned. But when the comparator 38 indicates to the control network 27 that the right-hand margin setting, namely column 80, has been taken by the character P.

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halt the word limit counter 31 in response to a corresponding one Signal of the control network 27 held by hold control unit 41 so that the counter does not respond to the address of the next word can be set as long as the margin process is not completed.

During the next scan of the buffer memory 19, will the zero character 48 (FIG. 6B) in column 79 of the relevant display line under appropriate control of the control network 27 entered. The content of the word limit memory 31 is incremented one at a time in response to over Signals fed to line 35 are switched on in order to trigger the new beginning of the word. This now becomes the character S, which was previously supposed to occupy column 79, is now placed in column 80. This condition results from the representation according to 6B, which also shows the start of the new display line. In this next line of display are the null characters 48 - also shown here again circled to show that they are invisible - in columns 01 and 02 listed. The short-term left margin character 46 appears in column 02 of the previous display line. During the next Scanning the buffer memory 19, a zero character is inserted before the beginning of the next word, the word limit counter 31 is incremented by one and the remainder of the display line by one character position to the right postponed. This process is repeated until comparator 39 determines that the right edge setting is accordingly Column 80, taken from the beginning of the word. This will cause the boundary overrun process with the next scan completed when the normal operating condition for the word limit counter 31 is present again.

jAs well as the characters are shifted away from the end of the line, they occur in the first empty character position of the next display line. This is ensured by the [Each shifted character is placed in the intermediate register 24 to then be entered into the data stream after

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a corresponding short-term left margin character has been detected by decoding. The completed legal border crossing process results from the illustration according to FIG. 6C.

The foregoing has described the flow of operations when the margin is exceeded when a document is displayed will. Essentially the same operational sequence results when a text that has been displayed is to be revised. If a word or character is used here, then the relevant margin can easily be exceeded Display line and thus possibly also result in subsequent display lines. In those cases, this would Marginal conditions, namely the occurrence of a character other than zero at the right edge of the text, which is in this Case is set to column 80, determined with the aid of the comparator 38 during the scan of the buffer memory 19, the count accumulated in the word limit counter 31 is held under the action of the hold control 41 and one corresponding number of null characters inserted in the data stream.

It should be emphasized that the scanning of the buffer memory 19 can take place at a much higher speed than the operation of the keyboard. This means that there is usually no need to buffer keyboard input. However, if time functions mode, namely, if a button corresponding multiple insertion of the character in question is carried out with continuous operation, then a corresponding ¹ buffer memory can in the interface 15 provide for itself to 'so that any possibility of the loss of a symbol transmission; which could occur due to the length of time required to execute word overflows. With continuous function operation, approximately 10 characters per second can typically occur and the normal scanning ^! The speed of the buffer memory is approximately [ 20 ms. If there is a word operation with the content of the word delimitation counter 31 recorded, ■

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trigger a rapid scan of the buffer memory 19, each sample taking approximately 2 ns. It may be desirable to view the screen during rapid scanning by means of a signal on line 49 in the display in order to avoid picture distortion or picture changes which are too disturbing Distraction of the screen viewer, turn off. After the overrun process is complete can then normal scanning of the buffer memory 19 again be included.

A completely different type of word operation which can be carried out with the circuit arrangement according to FIG. 2 exists in word deletion. To do this, a key specifically designed for word erase operations can be inserted in the Press keyboard 1. The position marker indicator can be in any character position within the word. If the word erasure request is decoded, then the word limit counter 31 is again accumulated when it is Count held at the beginning of the word if the cursor is during the next scan of the buffer memory 19 is decoded. Any character in the word in question that is so specified is displayed in the Buffer memory and deleted on the screen, whereby one character for each scan is deleted, word limit counter 31 is used to incrementally advance by one for each character to be deleted. Is any ! Characters deleted, then the character string is in the playback line moved to the left with the cursor remaining in its current position. the The delete mode is reset and the word deletion

Limitation counter 31 to continue normal operation released when the beginning of the next word is detected. Permanent operation of the word delete key

jin the keyboard has deletion of the next or even the next Words up to the end of the playback line.

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Alternatively, the deletion can be carried out from the position occupied by the position marker indicator to the end of the word; for this only a small, easily feasible modification of the circuit arrangement shown in FIG. 2 is required.

As mentioned earlier, an underline operation is performed by adding a special bit to the code of the characters in the buffer memory 19. The underline operation for underlining words, can be carried out by actuating a key on the keyboard 1 accordingly. The word to be underlined can be displayed on the screen by the corresponding position marker indicator division, which can be set to any position in a word, or also to a word delimiter or a Define word following zero. If the position marker indicator in the data stream originating from the buffer memory 19, by means of of the decoder 28 is detected, then the accumulated count is again held in the word limit counter 31. Is the Position marker indicator at the beginning of a word, a condition which can be detected by the comparator 37, then begins the underlining directly in that the control network 27 adds an underlining bit to the respective data characters triggers in one word. The underlining process is completed within one scan in the buffer memory 19. If the cursor is not set to the beginning of a word, the accrued The count of the word delimitation counter 31 is only recorded when the position marker indicator has been passed by the decoder 28 is detected to then be maintained for the next cycle of the data stream. An underline bit is given to everyone Characters as they are scanned by the buffer memory 19 are attached. The counter contents of the word limit counter 31 is incremented by one in response to the characters and the underlining sequence is'

I j

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completed when the first word delimiter or non-data character is detected by the character decoder 28. If the count in the word limit counter 31 is equal to the character and line counts in the buffer address register 23, then the beginning of the word is detected and the insertion of the underlining bits begins to continue as described to become. In this way, a text word can be keyed in using the keyboard 1 in order to then underline it without having to reset the position marker indicator to the beginning of the word, and then with keying to be able to continue with the next word. If a word underline is triggered and the position marker is located in the case of a format character, only this one format character is used, the one above as a one-character word is defined, underlined.

It will be readily appreciated that without departing from the invention, the arrangement shown and described is modified can be. For example, although the use of special keys for word erase and Underlining has been mentioned, the decoder 16 easily designed to detect specific key press combinations to trigger corresponding operations can. Furthermore, it is a prerequisite for the operation of the arrangement according to the invention that the text input and reproduction applies to a notation from left to right. Of course there should be no doubt that the invention can just as well be interpreted for a font representation from right to left. In this case the word overflow and the associated operations for the left margin setting would then have to be provided accordingly Will. In the same way, of course, the invention can also be used when the text is from above in word processing systems to be written or read downwards.

UK 977 004 8098 8 3/0662

Claims (1)

PATENT CLAIMS Electronic output device for multi-cell text display, which is equipped with a keyboard for entering text and Operational or operating information interacts and contains a buffer memory with the text to be displayed, in particular for editing, characterized in that during the cyclic scanning of the buffer memory the occurrence of a word delimiter can be detected in order to determine the beginning of each word in the buffer memory, that a per se known word limit counter when scanning the buffer memory successively in each case is to be loaded with the playback address and that a load lock for this word limit counter for addresses of subsequently occurring words can be triggered when a processing operation is carried out on a word should be carried out and to enable the word limit counter intended for the loading of a subsequent word when the processing operation is completed. 2. Arrangement according to claim 1, characterized in that a Buffer Spexcheradreßregxster for successive address recording each contained in this buffer memory : the letter or character is established and that ■ the loading of the contents of the buffer memory address register can be released in the word delimiter counter as soon as a word delimiter is detected during the scan. yy. Arrangement according to claim 1 and / or 2, characterized ^; shows that the load lock of the word limit counter j can be triggered as soon as a text margin is exceeded by a relevant word during playback, so that in response to this, the word limit counter has a Deletion process for the relevant letters or characters, ι in the reproduction affected by the border crossing DK 977 004 8038 δ3 / 0 $ β2 initiate line and trigger their display in the next display line. 4. Arrangement according to claim 3, characterized in that the first serving to detect the border crossing Switching network contains a comparator to determine the address of a character or letter entered for reproduction to compare with the contents of a boundary register that contains the address of the respective boundary which contains playback lines. 5. Arrangement according to claims 1 to 4, characterized in that that measures are effective in the case of buffer memory scanning are to incrementally advance the word limit counter by one and the character zero in front insert the word that caused the margin violation and that a further comparator is provided, to determine if the content of the word limit counter equals the content of this margin limit register is. 6. Arrangement according to claims 1 to 5, characterized in that that a second switching network in response to a word erase command entered from the keyboard to trigger the load lock of the word limit counter and to delete characters in the relevant word, such as by the content of the counter is determined until the beginning of the next word is determined. '. 7. An arrangement according to claims 1 to 6, marked by the fact characterized that in response to an input from the keyboard word underscore command a third switching network triggers the charge barrier of the word boundary counter by at the same time by the counter content ί underlined sign of the word concerned ι i be, ι UK 977 004 8 Q 9 8 8 3/0 S ö % 2825513 until the beginning of the next word is recorded. 8. Arrangement according to one of claims 6 or 7, characterized by sensing circuitry to determine when the buffer scan is the start of the word reached whose address appears in the word delimiter counter, with the character deletion or underlining can be triggered with the first character of the relevant word and through measures for step-by-step advancement of the word limit counter by one for each cleared or during the buffer scan underlined character, as well as by measures to terminate a delete or underline operation as soon as the counter contents in the word limit counter corresponds to the address of a word delimiter to indicate the beginning of the next word. 9. Arrangement according to claims 1 to 8, characterized in that that at the same time with the lock of the word limit counter measures are taken for the Prevent text reproduction. ^{UK 977} ° ⁰⁴ 809883/0662