JPH0262870B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a character processing device in a word processor or the like, and particularly to a character processing device that displays the tab position when a tab is set.

Conventional word processors do not display tabs at all, or they display a mark on the top line of the display screen near the scale used to indicate the position of characters. There was no more than a means to be taken. For this reason, conventional word processors require display lines for tabs when displaying sentences, etc., so they have the disadvantage of reducing the number of display lines for sentences. Since the position of the tab is far from the displayed top line, the tab position cannot be clearly recognized.

The present invention aims to eliminate the above-mentioned drawbacks and provide a character processing device that clearly displays the tab position without providing a line for displaying the tab.

That is, the character processing device of the present invention includes a storage means for storing character data to be displayed, a display means for displaying the character data stored in the storage means over a plurality of lines, and a tab position common to the plurality of lines. Based on a tab position storage means for storing data, character data stored in the storage means and the tab position data stored in the tab position storage means,
Display control for displaying a predetermined mark at a position that is not the tab position and where the character data does not exist, and when the character data does not exist at each position corresponding to the tab position data, the predetermined mark is displayed. a display control that displays a different mark at each position of the plurality of lines; and a display control that displays a character pattern corresponding to the character data when the character data is present at a position corresponding to the tab position data. The present invention is characterized in that it has a display control means for performing the following steps.

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows the configuration of a character processing device according to the present invention. 1 is a microprocessor, 2 is an address bus that specifies each I/O and memory address,
3 is a bidirectional data bus used to transfer various data, and 4 is a control bus used to read/write the memory, accept interrupts, send data set timing, etc.

The following devices are placed on these buses.

5 is a keyboard for data input; 6 is a keyboard controller; the keyboard controller 6 encodes data input from the keyboard 5 and sends an interrupt signal to the control bus 4;

7 is a CRT controller, for example, an integrated circuit H-D46505 manufactured by Hitachi is used, and this controller includes a CRT device 8, a character generator 9, a refresh memory 10, and a refresh memory controller 1.
Control 1.

The CRT device 8 is capable of producing a display similar to that of a normal television, and the character generator 9 inputs a code such as a character code or a line address of the character pattern to determine the pattern of the line of the character pattern. is output sequentially. In addition, the refresh memory 10 is a CRT
The character code to be displayed on the device 8 is stored, and the character code is repeatedly output according to the display instruction from the CRT controller 7, and the refresh memory controller 11 is operated according to the instruction from the CRT controller 7.
It controls the refresh cycle for CRT display and the writing and reading of data from the microprocessor 1.

Reference numeral 12 denotes a ROM (read-only memory), which stores means for executing the present invention and also stores various processing means. 13 is a controller for this ROM 12.

A RAM (random access memory) 14 is used for temporary storage of various data, and is controlled by a controller 15. illustrated
The RAM 14 includes a document data area 14A, a tab register 14B, and a screen top pointer 14C.

16 is a floppy drive device, and 17 is a controller for the floppy drive device 16.

18 is a printer, and 19 is a controller for the printer.

In order to perform so-called word processor processing according to the input from the keyboard 5 according to the control procedure stored in the ROM 12 and to display the results sequentially on the CRT 8, when entering the CRT display control part in the ROM 12, the process shown in FIG. The control indicated is started. That is, the address of the data to be displayed at the top of the CRT screen by word processor processing is stored in the screen top pointer 14C in the RAM 14. Naturally, data such as documents is stored in a document data area 14A in the RAM 14, and the screen top pointer 14C naturally points to an address in this document data area 14A. On the other hand, the position of the tab is stored in the tab register 14B in the RAM 14 according to the input of the tab set by word processor processing. This tab register 14B is
They are provided corresponding to character positions in the horizontal direction on a CRT display. For example, if the display has 32 characters in the horizontal direction, there will be 32 registers.

Based on the above premise, the CRT display control part will be explained with reference to FIG. In the explanatory diagram of FIG. 2, the refresh memory 10 is iCRTB.
The capacity corresponds to the number of characters displayed on the CRT, and it displays M characters horizontally and N characters vertically, and its position is the i-th character horizontally from the top left corner, vertically. It is expressed as a coordinate such as the J character, and the corresponding refresh memory is
Denoted by iCRTB(i,J). The tab register 14B is indicated as iTAB, and iTAB corresponds to the number of characters in the horizontal direction of the CRT display, ie, M. The value of this register is 1 when the tab is set, and 0 when the tab is not set. i.e. tab register
iTAB(i)=1 indicates that the tab is set, and iTAB(i)=0 indicates that the tab is not set.

In step 1, the first data in the document data area in the RAM 14 indicated by the first display pointer is sequentially written to the CRT refresh memory iCRTB. If no data has been entered from keyboard 5, etc., the blank code is in the document data area, so leave this part as is.
Transferred to iCRTB.

Next, in step 2, the i-th note of the tab register iTAB is checked. If it is 1 (Yes), that is, the tab is set, go to step 3.
Check whether iCRTB (i, J) is a white background code. If it is a white background code (Yes), step 4
Write the tab display code iCRTB (i, J) and enter step 5. Also, in step 3 above
If iCRTB (i, J) is not a white background code (No)
In other words, normally, if a character code etc. is included, the process goes to step 5 without passing through step 4 and executes this DO LOOP.
Repeat steps 3 and 4 until completion.

If iTAB(i) is not 1 in step 2 above (No), step 6 is entered and steps 2 to 2 are performed.
Check if DO LOOP up to step 5 is completed and repeat until completed.

In other words, it examines the data in the iCRTB in the column where the tab is set vertically, and only if it is a blank code, rewrites it to a tab display code.

Therefore, the contents of the refresh memory 10, i.e., the iCRTB, are always displayed on the CRT 8 by the CRT controller 7, so as mentioned above, the tab mark is displayed in the area where there is no data such as characters. will be done. A display example is shown in FIG. T1 and T2 are marks displayed by a tab display code, indicating that tabs are displayed only in areas where no input has been made yet. Note that the part displayed with a simple dot "." indicates a blank code.

In the above description, a tab mark is displayed only in the case of a blank code, but it is of course possible to display a tab mark also in the case of a space code.

As explained above, the character processing device according to the present invention is capable of displaying tabs by easy means, that is, without using means for displaying a special tab display line and without taking up dedicated display space for this purpose. .

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of a character processing device according to the present invention, FIG. 2 is an explanatory diagram explaining its operation, and FIG. 3 is a diagram showing an example of display. 1...Microprocessor, 2...Address bus, 3
...Data bus, 4...Control bus, 5...Keyboard, 6...Keyboard controller, 7...
CRT controller, 8... CRT device, 9... Character generator, 10... Refresh memory,
11... Refresh memory controller, 12...
ROM, 13...ROM controller, 14...
RAM, 15... RAM controller, 16... Floppy drive device, 17... Floppy drive device controller, 18... Printer, 19... Printer controller.

Claims (1)

[Scope of Claims] 1. Storage means for storing character data to be displayed; Display means for displaying character data stored in the storage means over a plurality of lines; and Tab position data common to the plurality of lines. tab position storage means for storing the tab position at a position which is not the tab position and where the character data does not exist, based on the character data stored in the storage means and the tab position data stored in the tab position storage means; , a display control that displays a predetermined mark, and a display control that displays a mark different from the predetermined mark at each position of the plurality of lines when the character data does not exist at each position corresponding to the tab position data. and display control means for performing display control for displaying a character pattern corresponding to the character data when the character data is present at a position corresponding to the tab position data. Character processing device. 2. The character processing device according to claim 1, wherein the marks different from the predetermined mark have different numbers of the predetermined marks. 3. The character processing device according to claim 1, wherein the mark is a dotted pattern.