JPS62105193A - Character processor - 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 [Field] The present invention relates to a character processing device capable of displaying a layout.

[Prior art]

A character processing device that creates and edits a document requires a display device that displays the contents of the document in order to know the status of the document currently being edited. However, since this display device generally becomes more expensive as it becomes larger, it is rare to have a display device that can completely display the contents of an entire page.
Usually, a display device is provided that displays only a portion of one page, for example, a range of 40 characters x 20 lines.

However, when a small display device like the one mentioned above is installed, it is not possible to view the entire page at once, so each character is expressed in a smaller size and the entire page is displayed on one screen. A so-called layout display is performed.

In the layout display above, each character is, for example, 8
Layout display was carried out using a built-in character pattern memory exclusively used for layout display, expressed as ×8 dots. As described above, in conventional character processing devices, a character pattern memory dedicated to displaying a layout is required separately from a character pattern memory for normal display, making it expensive.

[Purpose of the invention]

The aim of the invention is to eliminate the above-mentioned drawbacks. That is, the object is to provide a character processing device that can display a layout at a low price.

The present invention will be described in detail below with reference to the drawings.

FIG. 1 is a conceptual diagram.

The display means displays the patterns on the character pattern memory as standard characters, and displays the patterns on the second character pattern memory as reduced characters.

The second display means displays a pattern on the second character pattern memory as a second standard character, and the character pattern memory for reduced characters and the character pattern memory for standard characters are shared.

FIG. 2 is an example of the overall configuration of the present invention.

In the illustrated configuration, the CPU is a microprocessor, and performs calculations for character processing, logical judgments,
Each component connected to these 7 busses is controlled via address bus AB, control bus CB, and data bus DB.

Address bus AB transfers address signals indicating the components to be controlled by the microprocessor CPU. Control path CB is microprocessor CPU
Transfers and applies control signals to each component to be controlled. The data bus DB transfers data between each component device.

Next, ROM is a read-only fixed memory, and the seventh
Control procedures etc. by the microprocessor CPU, which will be described later with reference to FIGS. 9 to 9, are stored.

Further, the RAM is a writable random access memory having a configuration of 1 word and 16 bits, and is used for temporary storage of various data from each component.

TBUF is a document buffer that stores document information input from the keyboard KB. TLEN is a variable that indicates the number of lines in the document data, LLEN is a variable that indicates the number of characters in one line, B
UNSTXI is the X coordinate of the document coordinates where normal display starts,
BUNSTX2 is the X coordinate of the document coordinates where layout display starts, BUNSTYI is the Y coordinate of the document coordinates where normal display starts, BUNSTY2 is the Y coordinate of the document coordinates where layout display starts, CIGAR is the buffer that stores character data, PTN' is the buffer that stores the character pattern, BUNX is the X coordinate of the document that is currently being displayed, BUNY is the Y coordinate of the document that is currently being displayed, CRTX is the X coordinate of the screen that is currently being displayed, CRTY is the Y coordinate of the screen that is currently being displayed, KB
is a keyboard that has various function keys for instructing various functions for this character processing device, such as alphabet keys, hirakana keys, katakana keys, etc., and character/symbol entry keys, and kanji section start/end designation keys. We are prepared.

The DISK stores documents created in a memory for storing standard documents, and the stored documents can be called up when necessary by instructions from the keyboard.

CR is a cursor register. CPtJ allows you to read and write the contents of the cursor register. CRT (described later)
The controller CRTC displays a cursor at a position on the display device CRT corresponding to the address stored here.

DBUF is a display buffer memory that stores patterns such as document information stored in TBUF.

CRTC is cursor register CR and buffer DBUF
It plays the role of displaying the contents stored in the CRT on the display device CRT.

Further, a CRT is a display device using a cathode ray tube or the like, and a CRT controller controls the dot-configured display pattern and cursor display on the display device CRT.

Further, the CG is a character generator that stores patterns of characters and symbols to be displayed on the display 2tCRT.

CG is CG1. Consists of CG2 and CG3. CGl
CG2 is a character pattern memory for facial expression characters in normal display, and CG2 is a character/=turn memory for reduced characters in normal display, which also serves as a character pattern memory for standard characters in layout display.

CG3 is a character pattern memory for reduced characters for layout display.

The character processing device of the present invention, which is composed of each of these components, operates in response to various inputs from the keyboard KB, and when input from the keyboard KB is supplied, an interwoven signal is first sent to the microprocessor CP.
The microprocessor CPU reads various control signals stored in the ROM, and various controls are performed in accordance with these control signals.

FIG. 3 is a diagram showing the difference in concept between normal display and layout display.

(a) is an example of a normal display, and document creation, editing, etc. are performed based on this display, whereas (b) is an example of a layout display.

Compared to the normal display in (a), each character is displayed with 1/4 the area. Because the size of each character is smaller, more characters can be displayed, so it is mainly used when looking at the overall layout. However, as the font size decreases, individual characters become more difficult to read.

FIG. 4 is a more detailed illustration of the character pattern of each character in normal display and layout display.

(a) is an example of a character pattern for normal display, and each character is composed of 16×16 dots.

(b) is an example of a character pattern for layout display,
Each character consists of 8x8 dots.

The pattern (b) is also used as a reduced character pattern, which will be described later.

FIG. 5 is an example of the configuration of a CRT screen according to the present invention. C
RT is a display device, its display screen is divided into two, CR
Divided into TI and CRT2.

CRTI is a screen for normal display, and CRT2 is a screen for layout display.

CRT 14: HarXmJ (7) "m", rXnJ
(7) There are characters such as "n" that are 1/4 the size of normal characters. These characters are called reduced characters, and are used to represent exponents in mathematical formulas, as in this example, or to represent ruby characters.

On the other hand, the rnJ of "n2" is displayed on the CRT2, which is 1
/4, and the size is r x n J of CRTl.
” has the same size.

Unreleased tq-c'hac RT 1. (7) rXnJ Note rnJ The rnJ pattern of "n2" is made common and stored in the character pattern memory.

CRT coordinates (CRTX, CRTY) are assigned to the CRT screen. For example, if you want to display the character "n" at the position of CRTX=1 and CRTY=7, display buffer memory D
BUF(7)(CRTX-1)X8+(CRTY-1
) It is better to write the rnJ pattern from the address of X8×14.

In this example, the normal screen starts from CRTX=1 and CRTY=13, and has an area of 14 characters x 6 lines. The layout screen starts from CRTX=1 and CRTY=1, and has an area of 14 characters x 12 lines.

FIG. 6 is a diagram showing the structure of document data stored in the document buffer TBUF in the present invention.

(a) shows that TBUF is stored divided into several row data. Document coordinates are assigned to each line of data; for example, when specifying the first line of data, the Y coordinate of the document coordinates, BUNY=1, is set. The length of each line data is fixed, and the length is indicated by LLEN. The number of row data is indicated by TLEN.

(b) is a diagram showing the structure of each row of data. The line data consists of LLEN character data. Document coordinates are assigned to each character data, for example, when specifying the first character data, the X coordinate of the document coordinates BUNX = 1
shall be set as follows. The length of each character data is fixed, and each character consists of 4 bytes as described later.

(c) shows the structure of each character data. Each letter is 4
It is composed of nohikiito. The MSB is a bit that indicates whether the character is a normal character or a reduced character.
When SB=1, it is a reduced character, and when MSB=O, it is a normal character. CHR1 is composed of 15 bits, and a code indicating one character is stored in JIS code. CHR2 is 1
It consists of 6 bits, and like CHR1, codes indicating characters are stored in JIS code.

(C) The most significant bit of IR2 is unused. )MSB
= 1 (7), both CHRI and CHR2 are valid, and C
HRl corresponds to the reduced character on the left, and CHR2 corresponds to the reduced character on the right. When MSB=O, only C:HR1 is valid and CHR2 is ignored.

The operation of the above embodiment will be explained.

FIG. 7 is a flowchart showing the operation of the present invention when there is key human power.

In step 7-1, input from the keyboard is awaited. If key manpower is available, proceed to step 7-2.

The document data is updated based on the key data input in step 7-2, and the coordinates of the document to start displaying in order to display the updated state are determined by BUNSTXI, BU.
NSTYI (display start document coordinates for normal display), BU
Set to NSTX2 and BUNSTY2 (display start document coordinates for layout display).

In step 7-3, the process detailed in FIG. 8 is performed, and normal display is performed.

In step 7-4, the process detailed in FIG. 9 is performed to display the layout. When all processing is completed, the process returns to step 7-1 and waits for key human power.

FIG. 8 shows step 7-3 in detail.

In step 8-1, the normal screen is cleared.

In step 8-2, BUNX and BUNY, which are pointers indicating the coordinates of the document currently being displayed, are initialized. That is, substitute BUNSTXI to BUNX, and set BUNSTY
Assign I to 13UNY.

This is a pointer indicating the coordinates of the screen that is being displayed in step 8-3. Initialize CRTX and CRTY. That is, 1 is assigned to CRTX and 14 is assigned to CRTY.

Step 8-4i: c) (BUNX to AR, B
Substitute the character data indicated by UNY.

In step 8-5, it is determined whether CHAR is a standard character or a reduced character by checking the MSB. If it is a standard character, the process proceeds to step 8-6; if it is a reduced character,
Proceed to step 8-7.

In step 8-6, the standard character pattern is substituted into GETL and PTN from CGI.

In step 8-7, the reduced character pattern from CG2 is substituted into GETL and PTN.

The pattern obtained on the PTN in step 8-8 is
PUT and display at the positions indicated by RTX and CRTY.

In step 8-9, pointers CRTX and BUNX are updated. That is, CRTX-CRTX+2, BUN
Let X4-BUNX+1.

In step 8-10, it is determined whether one line of display has been completed. That is, it is determined whether CRTX exceeds 14 or BUNX exceeds LLEN. When the above conditions are met, it means that one line of display has been completed, so proceed to step 8-11; if not, proceed to step 8-11. Loop to 8-4.

In step 8-11, a pointer is set to the beginning of the next line. That is, BUNY-BUNY+1. CRTY 4
-CRTY+2, BUNX←BUNSTXI, CRTX
-1 and t6° In step 8-12, it is determined whether one screen has been displayed. That is, BUNY is TLE
Determine whether N has been exceeded or CRTY has exceeded 18. If the above conditions are met, the display has ended and the process is terminated; otherwise, step 8-4
loop to.

FIG. 9 shows step 7-4 in detail.

In step 9-1, the layout screen is cleared.

In step 9-2, BUNX and BUNY, which are pointers indicating the coordinates of the document being displayed, are initialized. In other words, by substituting BUNSTX2 into BU N
Assign NSTY2 to BUNY.

This is a pointer indicating the coordinates of the screen that is being displayed in step 9-3. Initialize CRTX and CRT-Y. That is, 1 is assigned to CRTX and 1 is assigned to CRTY.

In step 9-4, t, '-(CHAR is BUNX, B
Substitute the character data indicated by UNY.

In step 9-5, it is determined whether CHAR is a standard character or a reduced character by checking the MSB. If it is a standard character, the process proceeds to step 9-6; if it is a reduced character,
Proceed to step 9-7.

In step 9-6, the standard character pattern from CG2 is substituted into GETL and PTN.

In step 9-7, the reduced character pattern is substituted from CG3 into GETL and PTN.

The pattern obtained in PTH in step 9-8 is
PUTL is displayed at the position indicated by RTX and CRTY.

In step 9-9, pointers CRTX and BUNX are updated. That is, CRTX←CRTX+l, BUN
X=BUNX+1. ! = do.

In step 9-10, it is determined whether one line of display has been completed. That is, it is determined whether CRTX exceeds 14 or BUNX exceeds LLEN. If the above conditions are met, it means that the display of one line has been completed, so proceed to step 9-11; if not, proceed to step 9-11. Loop to step 9-4.

In step 9-11, a pointer is set to the beginning of the next line. That is, BUNY-BUNY+1, CRTY=C
RTY+1, BUNX←BUNSTX2, CRTX-1
shall be.

In step 9-12, it is determined whether one screen has been displayed. That is, it is determined whether BUNY exceeds TLEN or CRTY exceeds 12. If the above conditions are met, the display is finished and the process is terminated. If not, the process loops to step 9-4. do.

[Other Examples]

In the above explanation, it is assumed that 16 x 16 dots are displayed in the normal display and 8 x 8 dots are displayed in the layout display, but it is possible to process them in exactly the same way even if other dots are displayed. be. Further, the reduction ratio is not limited to 1/4, but can be similarly configured with any reduction ratio such as 1/2° 1/3.115.215'J.

Or, conversely, it is also possible to configure it so that there are standard characters and enlarged characters in the layout display, and the enlarged characters and the standard characters in the normal display are the same font size and have a common character pattern. .

In addition, in the embodiment, the normal display screen and the layout display screen are configured so that the screen of the same display device is divided into two and each display is performed, but they may be configured as completely independent display devices. It is also possible to use the same display screen alternately in a time-sharing manner.

[Effects] As described above, according to the present invention, since the character pattern memory for the reduced characters in the normal display and the standard characters in the layout display are shared, it is possible to realize a character processing device that can display the layout at low cost. can.

[Brief explanation of drawings]

FIG. 1 is a conceptual diagram of the present invention. FIG. 2 is a diagram showing an example of the overall configuration of the present invention, FIG. 3 is a diagram showing an example of normal display and layout display, and FIG. 4 is a diagram showing an example of character patterns used in normal display and layout display. FIG. 5 is a diagram showing an example of the structure of a CRT screen according to the present invention, FIG. 6 is a diagram showing an example of the structure of document data, and FIGS.
The figure is a flowchart showing the operation of the character processing device of the present invention. CPU...Processing unit ROM...Memory RAM...Memory CR block

Claims (1)

[Claims] a display means for displaying the contents of a document; a character pattern generation means for generating standard characters and reduced characters which are characters smaller in size than the standard characters; A character processing device comprising: a first control means for displaying a text on the display means; and a second control means for displaying the characters displayed in the standard characters by the first control means in the reduced characters.