JPS58162987A - Character display unit - 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] (b) Technical field of the invention The present invention relates to character display devices.

Prior Art and Problems In general, single-character display devices are equipped with various cursor movement keys and a cursor address register that holds the cursor address on the display surface, and the contents of the cursor address register are updated by operating the cursor movement keys. The cursor on the display screen can be moved while the image is being displayed.

Figures 1 and 2 illustrate examples of various cursor movement keys in conventional character display devices.
Particularly, the one shown in FIG. 1 has a fixed cursor movement amount by hardware, and the one shown in FIG. 1N2 shows one in which the cursor movement amount can be set by a program. These cursor movement keys all have fixed or semi-fixed cursor movement amounts and movement directions, making it difficult for the operator to quickly move the cursor to a desired position.

e→ Purpose of the Invention The present invention solves the above problems, allows the operator to easily set the cursor destination position each time, and allows the cursor to be moved from another position to the set position with just one operation. The purpose of this is to simplify the cursor movement operation.

B) Structure of the Invention In order to achieve the above object, the present invention is provided with various cursor movement keys and a cursor address register that holds the cursor address on the display screen, and the contents of the cursor address register are edited by operating the cursor movement keys. A cursor position storage instruction key for instructing to store the cursor position currently displayed on the display screen in a round character display device configured to move a cursor on the display screen while the cursor is being updated; A cursor address storage register that stores the current cursor address based on the signal from the storage instruction key, and a setting cursor that instructs to move the cursor to the position of the cursor address stored in the #cursor address storage register. The present invention is characterized by comprising a position movement instruction key and means for setting the contents of the cursor address storage register in the cursor address register based on a signal from the peritoneal cursor position movement instruction key.

(E) Examples of the invention Hereinafter, the present invention will be explained in detail with reference to the drawings.

Figure 3 is a block diagram of the main parts of a character display device according to an embodiment of the present invention.
15 is a cursor position storage instruction key.

6 is a setting cursor position movement instruction key, F is a selection gate circuit, 8 is a cursor address register, 9 is a cursor address storage register, 10 is a cursor address calculation circuit,
11 to 13 are AND gates. In the figure, cursor position storage instruction key 5. The setting cursor position movement instruction key 6, cursor address storage register 9, etc. are nine new parts in the present invention.

The operation of the embodiment is as follows.

Cursor movement keys 1 to 4 are shown in FIG. 1 (at to (d)
When the cursor movement key 1 is operated, the signal from the cursor movement key 1 is inputted to the cursor calculation circuit 10 through the selection gate circuit F and the AND gate 11. is instructed to increment the cursor address held in the cursor address register 8 by +1 in the X coordinate direction. This is from K.

Cursor operation time @10 is cursor address register 8
The contents of the cursor address are read out, the cursor address is calculated by +1 in the X coordinate direction, and the result is saved to the cursor address register 8 again. Similarly, when the cursor movement key 2 is operated, the cursor address in the cursor address register 8 is incremented by 11 in the X coordinate direction, and when the cursor movement key 3 is operated, the cursor address in the cursor address register 8 is incremented. is incremented by 1 in the X-coordinate direction, and when the cursor movement key is operated at 9, the cursor address in the cursor address register 8 is incremented by 1 in the X-coordinate direction. The cursor address in the cursor address register 8 calculated in this manner is sent to a display section (not shown), and a cursor is displayed at the cursor address position.

Next, an operation mode unique to the present invention will be explained. First, when the cursor position storage instruction key 5 is operated, the AND gate 13 is opened by a signal from the cursor position storage instruction key b, and the contents of the cursor address register 8 are set in the cursor address storage register 9. After that, when the setting cursor position movement instruction key 6 is operated.

By the signal from the setting cursor position movement instruction key 6,
AND gate 11 is made non-conductive, AND gate 1g is opened, and the contents of cursor address storage register 9 are set in cursor address register 8. As a result, the cursor is stored in the cursor address storage register /9 and displayed at the corresponding cursor address position.

That is, even if the cursor on the screen is displayed at an arbitrary location using the cursor movement keys 1, 4, etc., the cursor can be immediately moved to the desired position registered in advance by operating the setting cursor position movement instruction key 6. It becomes possible to display.

Although the above-mentioned embodiment shows a precedent in which a set of a cursor position storage instruction key 5, a cursor position movement instruction key 6, and a cursor address storage register 9 are provided, the present invention is not limited to this.

By creating multiple sets of these keys and registers, multiple display positions to which the cursor can be moved can be set with a single operation.

(f) Effects of the Invention According to the present invention, it is possible to improve the cursor movement speed f, so that the advantage of improving the operating speed of the operator can also be reduced.

[Brief explanation of drawings]

FIGS. 1 and 11g are diagrams showing examples of various cursor movement keys in a conventional character display device. FIG. 3 is a schematic diagram of main parts of a character display device according to a third embodiment of the present invention; In FIG. 3, 6 is a cursor position storage instruction key, 6 is a setting cursor position movement instruction key, 8 is a cursor address register, and 9 is a cursor address storage register.

Claims (1)

[Claims] It is equipped with various cursor movement keys and a cursor address register that holds the cursor address on the display surface.
In a character display device configured such that a cursor on a display screen is moved while the contents of a cursor address register are updated by operation of a cursor movement key, nine instructions are given to store the cursor position currently displayed on the display screen. , a cursor position storage instruction key, a cursor address storage register that stores the current cursor address based on a signal from the cursor position storage instruction key, and a cursor address storage register that stores the cursor address position stored in the cursor address storage register JK. a rounding setting cursor position movement instruction key for instructing to move the cursor; and means for setting the contents of the cursor address storage register in the cursor address register based on a signal from the setting cursor position movement instruction key. A character display device characterized by the following features.