JPS6197689A - Display control system for character processing system - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a display control method suitable for use in office computers, Japanese word processors, and other character processing systems involving Japanese processing, and particularly relates to a display control method suitable for use in office computers, Japanese word processors, and other character processing systems that involve Japanese processing. Realizes partial digit up and partial digit down functions for each character area of the bit image memory so that character positions such as subscripts and exponents often used in mathematical formulas are displayed in the same display position as in the print image. This enables easy-to-read display and facilitates data input operations, and also simplifies editing processing by removing the effects of two editing operations, improving the processing efficiency of character processing systems that involve Japanese processing. The present invention relates to a display control method.

Traditionally, character processing systems that involve Japanese language processing, such as Japanese word processors, have been connected to CRTs and other display devices, allowing operators to interact with a single display screen. Performs necessary data input/output and editing operations.

6(1) and (2) are examples of display of the chemical formula rH20J by a display control method used in a conventional display device. In the drawing, A is a space symbol.

B indicates a downward half-line feed symbol.

In order to display the chemical formula rHzOJ on a conventional display device, as shown in the display example in Figure 6 (1), it is necessary to use the half line feed function and instruct a downward half line break; Therefore, the subscript "2" is displayed at a line position half a line below.

In this way, in the conventional display control method, the character string "H2O", which should originally be arranged in one line, is divided into two lines and each is processed as data on a separate line, forming one line on one display. There is. That is, in actual processing, rHJ and "0" data at the character position of normal display are placed on the same line, and the subscript "
2" data is arranged in the row half a row below.

Therefore, in the display state as shown in FIG. 6(1), if you delete, for example, only one space symbol A in front of "H" by editing operation, the display screen will look like this.

It changes as shown in FIG. 6 (2).

In other words, the line displaying rHJ and "0" moves forward by one character, but the subscript "2" half a line below is left in the same position, so it has no meaning as a chemical formula, and "2" is written anew. It is necessary to move the character forward by one character.

Such black dots are exactly the same when the exponent "2" is displayed by an upward half-line feed operation, as in the mathematical expression n2.

In this way, the display control method of a display device connected to a conventional character processing system has a half-line feed function, but the display state is very different from the actual print image, making it difficult to see, and furthermore, it is difficult to see due to the single editing operation. 61-15 Therefore, in the display control method of the character processing system of the present invention, such disadvantages in the conventional display control method using the half line feed display function are solved. The purpose is to improve the operational efficiency of character processing systems that involve Japanese processing by making it possible to display character positions that are close to the actual printed image, and by eliminating the effects of editing operations on other lines. shall be.

For this purpose, in the display control method of the character processing system of the present invention, the partial digits or digits in each character area of the bit image memory correspond to each code section provided in the text memory of one display means. An attribute section is provided to store partial upper bits and partial lower bits for indicating the lower position, and when writing the data of each code section of the text memory to each character area of the bit image memory, the central control section The states of the partial upper bits and partial lower bits are detected, and the write address of pattern data in each character area of the bit image memory is controlled based on the detection results.

Next, an embodiment of the display control method of the character processing system of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a functional block diagram showing an example of the configuration of main parts of a Japanese language processing system used when implementing the display control method of the present invention. In the drawings, 1 is a central control unit;
2 is an external storage device, 3 is an output device, 4 is an input device, 5 is a display control unit, and 6 is a display device.

The functions of each part are outlined below.

The central control unit 1 includes a CPU, a ROM for storing programs and data, a RAM, etc., and controls other units.

The external storage device 2 is a device that semi-permanently stores programs and data, and is, for example, an FDD (floppy disk drive).
disk driver) or HDD (hard disk drive)
driver) etc.

The output device 3 is a printer that prints results obtained by a device that semi-permanently stores programs and data, that is, data such as documents.

The input device 4 is used to issue instructions for program execution and input data, and is comprised of a keyboard or the like.

Display device i! Reference numeral 6 denotes a device for displaying data such as documents using a program, and is equipped with display means such as a CRT.

The display control section 5 is a section that controls one display device 6, and is also a section that implements the display control method of the present invention.

The following FIG. 2 is a functional block diagram showing an example of the main part configuration of the display control section 5 of FIG. 1 used when implementing the display control method of the present invention. The reference numerals in the drawings are the same as in FIG. 1.

Further, 51 is a text memory, 52 is a character generator, 53 is a bit image memory, and 54 is a display output control section.

The text memory 51 is composed of a code section and an attribute section.

FIGS. 3(1) and (2) show the text memory 51 in FIG.
Figure (1) shows the overall configuration of the text memory 51, and Figure (2) shows the configuration of the attribute section corresponding to one character area.

As shown in FIG. 2 (1), the text memory 5
1 has a matrix configuration of n rows and m digits, and its storage capacity is at least one display device! It has a capacity larger than the number of display lines and display digits of 6.

A character code is stored in the code section of the text memory 51, and data indicative of attributes such as partial digits above and below are stored by the central control section 1 in the attribute section.

As shown in Figure 3 (2), two specific bits are assigned to the attribute section corresponding to each code section, one of which is the upper bit of the partial digit, and the other bit is the lower bit of the partial digit. It is said that

In this embodiment, when either the partial digit upper bit or the partial digit lower bit is '1'', that is, on, it indicates partial digit upper or partial digit lower.

If both bits are both ## Q If ie off, or.

1", that is, when it is on, it instructs display at the normal character position.

The character generator 52 stores data for a single character font.

The bit image memory 53 has one bit per pixel number of one display device 6.
These are display memories that have a one-to-one correspondence.

The display output control section 54 is a control section for periodically outputting the contents of the bit image memory 53 to one display device 6.

Next, the operation when displaying the chemical formula "H2O" as shown in FIG. 6(1) using the display control method of the character processing system of the present invention will be described.

Figures 4 (1) to (4) are diagrams showing the correspondence between the configuration of the bit image memory 53 and the character position according to the upper and lower two digits in one character area. A conceptual configuration diagram showing the arrangement state of display lines and display digits on the memory 53. Figure (2) shows the normal character position in one character area. Figure (3) also shows the character position at the lower part of the digit. Figure (4) shows the character position when the partial digit is on.

The configuration of the bit image memory 53 is 1, for example, this fourth bit image memory 53.
As shown in Figure (1), horizontal x vertical = 720 x 450 (bits).

In addition, one character area is
), the data is 24X30 (bits), and the character font data is 24X24 (bits).

In this case, the display capacity of the bit image memory 53 is width x height = 30 (=720/24) (digits) x 15 (
=450/30) (row).

Here, consider the start address in each character area of the bit image memory 53, that is, the upper left address S.

In this case, the number of bits in the horizontal direction of the bit image memory 53 is 72o (bits), and if the address is given in units of 8 bits, then 720 (bits)/8
(bit)=90 (byte).

Therefore, a total of 90 addresses are required for one row of the bit image memory 53, corresponding to 90 (bytes) that constitute one row.

One character area is 3 bytes with 24 bits in the horizontal direction, that is, in the digit direction.

The first address in the horizontal direction is 9o/3:30 for each line.
Therefore, there will be a total of 30 addresses.

Further, the vertical direction, ie, the row direction, is 450 bits, and one character area is 30 bits.

Therefore, the first display line is the Nth character area, the display digit is the Mth character area, and the first display line is (N+1).
) and the display digit is the Mth character area, the relationship is the address obtained by adding 90×30=2,700 to the start address of the character area where the display line is N and the display digit is M.

In other words, the upper left address S of each character area is S = ((N-1) X90X30) + ((M-1)
X3) It can be obtained from the formula +P.

Here, N represents what line, M represents what digit, and
Let P represent the start address of the bit image memory 53 (in the case of display row N=12 display digit M=1).

When writing pattern data to the character area, the central control unit 1 writes the character code "H" and attributes (partial upper bit PU: "0", partial lower digit Bit PD="O' is stored.

Further, the character generator 52 sequentially outputs a character font determined by the character code to the corresponding position of the bit image memory 53, and writes the character font by applying its attributes.

Next, the character code of r2J and the attribute (partial digit bit PU="O") are stored in the next digit position of the text memory 51.
9 partial lower bit P D = "1") is stored.

Writing to the bit image memory 53 is performed using the character code “
The same is true for HJ.

Finally, in the next digit position of the text memory 51, "
O” character code and attribute (partial digit bit PU=
“O”, partial lower digit beat/to PD=“0”) and similarly written to the bit image memory 53.

FIG. 5 is a flowchart for explaining the operation of partial digit up and partial digit down by the display control method of the character processing system of the present invention in the circuits shown in FIGS. 1 and 2.

In FIG. 5, when writing a character font to N rows and M columns of the bit image memory 53, a write address X is determined.

For this purpose, the first address S of the character area is calculated from N rows and M columns using the above formula.

Next, regarding the attribute bits of N rows and M digits, that is, the upper partial bit PU and the lower partial bit PD,
"or'"0").

If PU="l' and PD="O", the process moves to the flow on the left side of FIG. 5, and the write address is set to X=s.

Furthermore, if PU="0" and pDw"1"', the flow moves to the right side and the write address is set to X=S+90x6.

On the other hand, PU=PD="0" or PU=PD
If ="1", the process moves to the flow in the center of FIG. 5, and the write address is set to X=S+90X3.

Through such processing, in the display control method of the character processing system of the present invention, as shown in FIG. 4 (2) to (4),
Originally, one line of data is written to the one line character area on the bit image memory 53, and the character pattern is displayed accurately at its normal position and at the position above or below the partial digit. Ru.

Therefore, characters that should normally be displayed on one line are not displayed on three lines, including those above and below the half-line break, as is the case with conventional display control methods, and characters that are inserted or deleted using * collection operations, etc. Even if this happens, other characters will not be affected.

Moreover, the display position of the characters is close to the actual print image, and does not differ significantly from the actual print image as in the conventional display example shown in FIG. 6(1).

As explained in detail above, in the display control method of the character processing system of the present invention, the partial digit or digit in each character area of the bit image memory is An attribute section is provided to store partial upper bits and partial lower bits for indicating the lower position, and when writing the data of each code section of the text memory to each character area of the bit image memory, the central control section The states of the partial upper bits and partial lower bits are detected, and the write address of pattern data in each character area of the bit image memory is controlled based on the detection results.

Therefore, according to the display control method of the character processing system of the present invention, it is possible to display an easy-to-read character arrangement close to the actual printed image, and the display data of one line can be substantially reduced. Since it is processed as one line, the influence on the display position of other characters, which often occurs during editing operations such as deletion and insertion, is completely eliminated, which greatly improves the operational efficiency of character processing systems that involve single-Japanese processing. Improved. This excellent effect can be obtained.

[Brief explanation of the drawing]

1 is a functional block diagram showing an example of the essential configuration of a Japanese language processing system used when implementing the display control method of the present invention, and jIUL is used when implementing the display control method of the present invention. Regarding the display control section 5 in FIG.
The functional block diagram illustrating an example of the configuration of its main parts, lfi■NO4■ is a conceptual structural diagram of the text memory 51 in Figure 2, and Figure (1) shows the overall configuration of the text memory 51, (2)
41-4- shows the configuration of the attribute section corresponding to one character area, and 41-4- is a diagram showing the correspondence between the configuration of the bit image memory 53 and the character position according to the partial digit above and below in one character area. Figure 1 (1) is a conceptual configuration diagram showing the arrangement of display lines and display digits on the bit image memory 53, Figure (2) is the normal character position in one character area, and Figure (3) is the same. Figure (4) shows the character position when the partial digit is below, and the character position when the partial digit is above.JLLiL is in the circuit shown in FIGS. A flowchart for explaining the operation of partial digit up and partial digit down by the display control method of the character processing system of the present invention, FIGS. 6 (1) and (2) show the chemical formula This is a display example. In the drawings, 1 is a central control unit, 2 is an external storage device, and 3 is a central control unit.
is an output device, 4 is an input device, 5 is a display control unit, and 51
52 is a character generator, 53 is a bit image memory, 54 is a display output control section, and 6 is a display device. O 4 Iri 5 Illustration 6 Illustration

Claims (1)

[Claims] In a Japanese character processing system comprising at least an input means, a display means having a text memory and a bit image memory, an output means, and a central control unit for controlling these, An attribute section is provided for storing a partial digit upper bit and a partial digit lower bit for indicating a partial digit upper or lower digit in each character area of the bit image memory, corresponding to each code portion written in the text memory. When writing the data of each code part to each character area of the bit image memory, the central control unit detects the states of the partial upper bit and partial lower bit, and the state of the partial bit is determined based on the detection result. A display control method characterized by controlling write addresses of pattern data in each character area of an image memory.