JPH04297B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a display method in an information processing system such as a word processor.

[Prior art]

Conventionally, in a word processor, a part of the user data area is specified, and a part of the display screen of a CRT display device is also specified, and character data from the user data area is read and displayed on the specified display screen. is being carried out.

On the other hand, the character data includes half-width characters, full-width characters, and double-width characters, each of which has a different horizontal width, and any of these characters can be mixed and used as needed. The width ratio of half-width, full-width, and double-width characters is 1:
The ratio is 2:4.

[Problems with conventional technology]

Of the three types of characters mentioned above, when data containing double-width characters in particular is read from the user data area and displayed, the characters that are displayed when the double-width character data crosses the boundary between the designated display screen and other screens. This causes the inconvenience that the image is cut in half and the right or left side is no longer displayed. Therefore, conventionally, in such cases, the double-width character had to be intentionally moved to the next line, or it had to be forced to be displayed on the right or left side of the double-width character, which made display processing operations complicated. Something happened. The above-mentioned problem also occurs when scrolling character data.

[Purpose of the invention]

A display method for an information processing system that allows you to specify a part of the display screen, display character data specified and read from the user data area, and scroll rows and columns freely, without having to be aware of double-width characters. The purpose is to provide.

[Key points of the invention]

The present invention is provided with a display area specifying means for specifying a part of the display screen and a boundary character symbol display means for performing boundary processing on double-width characters.

〔Example〕

An embodiment in which the present invention is applied to a word processor will be described below with reference to the drawings. FIG. 1 is a block circuit diagram of a word processor. The information input circuit 1 is provided with various keys necessary for editing, proofreading, etc. when creating documents, such as katakana keys, conversion keys, etc., and the output signals of each key are sent to the CPU (central processing unit) 2. input. This CPU
Reference numeral 2 denotes a circuit that also controls the operation of the entire word processor, and is composed of a control program and the like.

Storage device 3 is RAM (random access memory)
etc., and the reading and writing of data required when creating a document is executed under the control of the CPU 2. M.C.B.
(MACRO CONTROL BLOCK) Execution circuit 4
is a circuit that executes the data of the macron control block (described later) inputted by the operator into the storage device 3, and by this execution, the user data of the storage device 3 is displayed on the specified display screen on the display device 6 consisting of a CRT display. The data read from the area is displayed. The display operation of the display device 6 is directly controlled by the display control circuit 5, and its screen configuration is 24 rows×80 columns.

The kana-kanji conversion control circuit 7 uses the above-mentioned katakana key,
This is a circuit that controls the operation of converting characters input by operating a conversion key into kanji by searching the dictionary memory 9. In this case, this circuit 7
controls the information extraction control circuit 8 to execute a search operation for the dictionary memory 9. The kana-kanji conversion control circuit 7 also controls the operation of the information editing circuit 10 to execute editing operations such as scrolling and boundary processing.

FIG. 2a shows a conceptual diagram of a data column of a user data area secured by a user in the storage device 3. That is, the beginning is the area for the user program that constitutes the microcontrol block, and as shown in the figure, there is an area for inputting the program number (exemplified as STATUS 1), and a user area start address (START.
ADDR), 1 record length (REC.LENGTE), display information storage address, reserved (RESERVED), and reserved areas. Following this user program area, a plurality of user data areas (user files) containing various character data are provided. In the illustrated example, REC, O~
Data areas up to REC and J are provided.

In the user program area, there is a display device 6.
When the user specifies the display area and reads out and displays a desired character data group from the user data area, program data is written which the user inputs using the keys from the information input circuit 1. The start address of the desired display data in the user data area is written as the user area start address. Also, the length of one record is indicated on the display screen.
This is data corresponding to 80 columns. Furthermore, the display information storage address area includes a row and column data area indicating the display data start position, a row and column data area indicating the display length, and the address of the designated display screen, as shown in FIG. 2b. , a scroll direction register, a data area that indicates the upper limit and the left limit, and a data area that indicates the lower limit and the right limit, respectively.

The specific configuration of the scroll direction register is shown in Figure 2c, and has a capacity of 16 bits (2 bytes), with 12th bit b11, 11th bit b10, 10th bit b9, and 9th bit b9. Flags indicating the scroll directions of up, down, left, and right are placed in b8, respectively.

Also, the upper limit, lower limit, left limit, and right limit data are respectively
0-22, 1-23, 0-78, 1-79.

Note that each of the user program area and user data area stores 2 bytes of data. Furthermore, when the character data stored in the user data area is a half-width character, it is expressed as a 2-byte character code.
In addition, full-width characters are represented by two character codes of 2 bytes each, and double-width characters are represented by a total of 8 bytes of double-width specification code "FFFF" (hexadecimal code representation) on the lower side of the two 2-byte character codes. is added and expressed.

3a and 3b are circuits that perform boundary processing when specifying a screen display area and reading and displaying specified data from a user data area, respectively;
It is provided in CPU2. Here, a and b are circuits that perform boundary processing on the left side or right side of the screen, respectively.

First, in the left boundary processing circuit of a, comparator 1
5, the data read from the user area start address X and the double-width designation code FFFF are input, respectively, and the contents of the two are compared. The match signal is sent to the AND gate 16, and the mismatch signal is sent to the comparator 1.
7 enable terminal ENA respectively. The data from the user area start address X is input to the other end of the AND gate 16, and the output of the AND gate 16 is applied to the character generator 18 in the display control circuit 5. To normally display character codes as they are on the screen. Also, the comparator 17 has a double-angle designation code for data from the user area start address X-2.
FFFF is input, the two are compared, and if they match, a match signal is output, which is applied to the character generator 19 in the display control circuit 5 to display the boundary character symbol 〓 on the screen.

On the other hand, in the boundary processing circuit on the right side of b, data from the final address Y of designated display data for the user data area is input to one end of the comparator 20 and the delay circuit 21. Further, the double-width specification code FFFF is input to the other end of the comparator 20, and the coincidence signal from the comparator 20 is applied to the character generator 19, and the boundary character symbol 〓
is displayed, and the mismatch signal from comparator 20 is input to AND gate 22. The delayed output from the delay circuit 21 is input to the other end of the AND gate 22, and the output of the AND gate 22 is applied to the character generator 18.
The character pattern starting from address Y is displayed normally.

Next, the operations of the five boundary processing examples shown in FIGS. 4 to 8 will be explained with reference to the flowcharts shown in FIGS. 9 to 11. First of all,
(row 4, column 2) ~ on the display screen with reference to Figure 4
(Row 4 to Column 14), one row and 13 columns of character data is designated, read out, and displayed starting from address _X0 of the user data area in the storage device 3. In this case, starting from address X ₀ of the user data area specified by address X ₀ above, 13
It is assumed that each address area for each column stores each character code of the characters "AB...AIU" as shown in FIG. 4c. As shown in the figure, the characters "double", "kaku", and "degree" are each double-width characters, and a double-width designation code FFFF is attached to each character code. In addition, by key operation of the information input circuit 1, the above address X ₀ , 1 record length (80 columns), display length 1 row 13 columns, display screen address (row 4, column 2),
Since scrolling is not performed, a flag of "0" is input to the upper, lower, left, and right flag bits of the scroll direction register, and data of "0" is input to the upper limit, lower limit, left limit, and right limit.

By the above key operation, the CPU 2 first moves from address X ₀ to display data start position address 2.
8,2 is calculated and written in the corresponding area of the display information storage address. Note that this line data 28 is the 4th line of the 2nd page in the user data area (1 page is 24
line). As a result, the data storage state of the macro control block becomes as shown in FIG. 4d, and the data storage state of the display information storage address becomes as shown in FIG. 4e. Next, the CPU 2 drives the MCB execution circuit 4 to perform boundary processing according to the above-mentioned data contents of the macro control block, and causes the result to be displayed on the screen of the display device 6. This overall operation will be explained with reference to the flowchart of FIG.

First, _the user-specified parameter analysis process (step _S1 ), ie, the data processing of the macro control block, is performed as described above. Next, it is determined whether or not there is a specification error in this macro control block (step _S2 ), and if so, an error flag is set and an error display is performed (step _S3 ), and re-input is instructed. On the other hand, if there is no instruction error, the process proceeds to step _S4 , and it is determined whether or not the scroll mode is selected. In this case, it is determined whether or not there is a flag of "1" in each bit of the scroll direction register on the top, bottom, left, and right, and in this example, both bits are "0".
Therefore, it is determined that the mode is not scroll mode. The process then proceeds to step _S7 , where data for one row, in this example, 14 designated columns, is read out from address _X0 in the user data area (step _S7 ), and boundary processing is performed (step _S8 ).

Next, the display control circuit 5 is caused to calculate the address of the display device (CRT display device) and display the read data for one line (step _S9 ,
_S10 ). Then, for example, a line counter (not shown) is incremented by one line (step _S11 ),
Determine whether the specified number of lines has been reached (step
_S7 ), if it has not been reached, return to step _S7 and start the above-mentioned operation for the next line of data.However, in this example, the specified number of lines is one line, so this concludes the boundary processing and display processing. . The display state becomes as shown in FIG. 4b. Next, the concrete operation of the boundary processing in step _S8 will be explained with reference to the flowchart of FIG. 10.

That is, first, the arithmetic processing of step _T1 is performed.
Now data X corresponds to X ₀ , and this X ₀ is shown in Figure 4c.
As shown, the first character A of the specified display data
corresponds to the address of Therefore, X + 2 x display length (row x column) - 1 = X + 2 x (1 x 13 - 1) = X + 24 In other words, the address 24 addresses ahead of address X
This corresponds to Y ₀ (shown in FIG. 4c), and this Y ₀ is taken as data Y.

Next, the content of this data Y is the double-angle specification code
Determine whether it is FFFF or not. So now address Y ₀
Since the character code of the character "U" in full-width characters is stored, it is not the double-width designation code FFFF, and therefore the character "U" is displayed normally. That is, to explain this more specifically as a circuit operation, in the right _- hand boundary processing circuit shown in FIG. Gate 22 is opened. and gate 22
Since the above character code is input to the other end via the delay circuit 21, the character code is input to the AND gate 2.
2 and sent to the character generator 18, where it is normally displayed on the screen. The boundary processing on the right side is completed as described above, and then
The CPU 2 performs similar boundary processing on the left side, and the details will be explained in detail later using an example.

Next, a second example, which is a modification of the first example described above, in which the symbol 〓 is displayed by boundary processing, will be described with reference to FIG. That is, it is assumed that character data is read out and displayed on the display screen from address _X0 onwards for one row and nine columns from (row 4, column 2) to (row 4, column 10). The key operations are the same as described above, but the display length data is (1, 9) as shown in FIG. 5e, which is different from the first example. In the boundary processing in the flowchart of FIG. 10, the calculation at step _T1 is as follows: X+2 {display length (row x column) - 1} = That is, it corresponds to address _Y1 which is 16 ahead of address _X0 , and this becomes data Y. Therefore, this data Y ₁ is the double-width character "degree"
Since the address is the double-angle specification code FFFF, this is determined in step _T2 , and the step
At _T3 , symbolization processing is executed to display this double-width designation code as a special character, that is, the symbol 〓.

In the boundary processing circuit shown in Fig. 3b, the data FFFF from address _Y1 and the double-angle designation code FFFF are input to the comparator, and as a result, the comparator outputs a match signal to the character generator. 19
and the symbol 〓 instead of the letter ``degree'' cut in half
Display.

Next, three examples of boundary processing sequences when scrolling will be explained. First, the first example will be explained with reference to FIG. Now, as shown in FIG. 6a, it is assumed that character data for one row and 13 columns of the user data area similar to the example of FIG. 4 is read out and the character data is scrolled to the left by five columns. In this case, the key operation is the address of the display data start position.
X ₀ , 1 record length (80 columns), display length 1 row 14
column, display screen address (row 4, column 2), flag “1” in the bit indicating the left of the scroll direction register,
Input the left limit data "5" respectively. As a result, first, characters are displayed as shown in FIG. 6a. Then, in step _S4 of FIG. 9, the scroll mode is determined from the flag "1" in the left bit of the scroll direction register, and the process proceeds to step _S5 , where scroll length measurement processing is executed (step _S5 ). That is, data "5" at the left limit is read, and scroll processing for five columns to the left is executed (step S ₆ ).

In this scrolling process, the address X is incremented by 2 every time the column is scrolled by one column. That is,
The above X where the letter "AB" is scrolled is from X ₀
Changes to X ₀ + 2, and the characters "CD", "Kan", "character",
When the left half of the double-width character "double" is scrolled sequentially, the above X becomes X ₀ +4, X ₀ +6, X ₀ +
8, X ₀ +10. This address X ₀ + 10 is the 6th
In figure c, it is indicated by X ₁ .

Then, in step _S7 , the next character data "Eokaki" is added by the amount of character data that was scrolled and disappeared.
The left half of the double-width character "width" is read out and the process advances to boundary processing step _S8 . That is, the process of step _U1 of the flowchart shown in FIG. 11 is started,
It is determined whether the address data has a double-width designation code FFFF. _Now , the data _{at address} It is said that Then go to step U ₃ and _enter that address
It is determined whether the data of -2 is equal to FFFF. Therefore, the data at _{the address} The processing already described, indicated by the symbol 〓, is executed.

After processing the left border of the display specified area above,
The CPU 2 moves to the right boundary processing and starts the processing of step _U1 . The address Y at this time indicates _Y2 shown in FIG. 6c, and the data at this address _Y2 indicates the double-angle designation code FFFF. Therefore, in step _U1 , this double-angle designation code FFFF is determined, and the process proceeds to step _U6 , where the double-angle designation code FFFF is determined again, and the process proceeds to step _U7 .
The symbol 〓 will be displayed on the left half of the double-width character ``width''. That is, in this example, as shown in FIG. 6b, the symbol 〓 will be displayed at both ends of the display designation area.

The circuit operation of FIG. 3b for the right-hand boundary processing described above is similar to that already described. On the other hand,
The left-hand boundary processing is performed by the circuit of FIG. 3a. That is, in the determination process of step _U1 , the character code of address _X1 is input to the comparator 20, compared with the double-width designation code FFFF, a mismatch signal is output, and the comparator 17 is enabled.

Next, in step _U2 , the double-angle designation code _FFFF addressed by and the symbol 〓 will be displayed.

Next, a second example of scrolling will be explained with reference to FIG. This second example is an example in which 5 lines and 79 columns of characters shown enclosed on the screen in FIG. 7a are scrolled upward by 5 lines. Then, character data for 5 rows and 79 columns (each _row means 79 columns) from address do.
Therefore, key operations are performed for this purpose. Furthermore, in order to issue a scroll instruction, a flag "1" is set in the upper bit of the scroll direction register, and a key operation is also performed to input data "5" to the upper limit. Then
The CPU 2 calculates (row 51, column 1) as display data start position data from the input address X. That is, address _X3 corresponds to the third line of the third page of the user data area.

As a result, the scrolling process is executed and all of the data in the 5th row and 79th column are scrolled upward and disappear (steps S ₅ and S ₆ ). Next, steps _S7 to _S12 are repeated five times, and the specified five lines of character data are read out line by line from the user data area and displayed as shown in FIG. 7b. Note that in this case, since no double-width characters are included, the symbol 〓 will not be displayed due to boundary processing.

FIG. 8 shows a third example of scrolling. In this example, the two rows of data (rows 2 and 3) enclosed in FIG. 8a are scrolled five columns to the left, and the result is as shown in FIG. 8b. Note that the operations such as boundary processing are the same as those described above, and the explanation thereof will be omitted.

〔Effect of the invention〕

As explained above, this invention allows character data of any length specified and read from a predetermined data area to be freely read by specifying a part of the display screen without having to be aware of double-width characters through boundary processing. Since we have provided an information processing system that can be displayed on or during scrolling, there is an advantage that data can be displayed in an easy-to-read state without having to be conscious of the characters on the boundary due to its boundary processing function. Furthermore, being able to specify and display an arbitrary amount of data from a predetermined data area is extremely effective in practice.

[Brief explanation of drawings]

Fig. 1 is an overall block circuit diagram of an embodiment in which the present invention is applied to a word processor, Fig. 2a is a diagram conceptually showing the data format of the user data area, and Fig. 2b is a diagram showing the display information storage address. A detailed view of the area, FIG. 2c is a configuration diagram of the scroll direction register, FIGS. 3a and b are diagrams showing the left and right side boundary processing circuits, respectively, and FIGS. 4 and 5 are diagrams showing the normal Figures 6 to 8, which show the pattern of boundary processing when displaying, respectively,
FIG. 9 is a flowchart illustrating the overall operation; FIG. 10 is a flowchart illustrating boundary processing during normal display; FIG. 11 is a flowchart illustrating boundary processing during scrolling. DESCRIPTION OF SYMBOLS 1...Information input circuit, 2...CPU, 3...Storage device, 4...MCB execution circuit, 5...Display control circuit, 6...Display device, 7...Kana-kanji conversion control circuit, 8... Information extraction control circuit, 9... Dictionary memory, 10... Information editing circuit, 15, 17, 20...
...Comparator, 18,19...Character generator.

Claims (1)

[Scope of Claims] 1. In an information processing system having a display device, a display area specifying means for specifying a part of a display screen, and displaying character data in the specified display area specified by the display area specifying means. and a boundary character symbolization/display means for displaying a part of the character data located across the boundary between the designated display area and other display areas that belongs to the designated display area as a special symbol. A display method for an information processing system. 2. In an information processing system having a display device, there is a display area specifying means for specifying a part of the display screen, and when character data is scrolled in the specified display area specified by the display area specifying means, the specified display area is An information processing system comprising: boundary character symbolization display means for displaying a portion of character data that belongs to the specified display area as a special symbol among character data located across boundaries with other display areas. Display method.