JPS646485B2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention is directed to displaying text and image information to be displayed sent from an upper-level connection device (generally a host computer) immediately upon receiving it. A character image that has a mechanism that allows it to be stored in the buffer memory of the display device according to the operator's commands or commands from the upper-level connected device, and to allow the data to be viewed at any time by the operator's operation. Regarding the display method.

[Conventional technology and problems]

When attempting to communicate with a computer system using a conventional text area image display device, an operator generally determines the next action to take by looking at the screen. Then enter the command. When a command is input, the screen information is rewritten at a speed determined by the computer system's response time and line speed. As a result, the cause of the action often disappears regardless of the operator's will, and the operator is unable to visually compare and examine the cause and its result, and the operator cannot remember it. There is a drawback that it requires a lot of comparative analysis.

[Purpose of the invention]

The present invention eliminates the above-mentioned drawbacks, and instead of immediately displaying text or image drawing information sent after that point on the screen according to a command from an operator or a higher-level connected device, The object of the present invention is to provide a character image display method in which characters are temporarily stored in a buffer memory of a display device and the contents displayed on the screen can be controlled by an operator.

[Structure of the invention]

To this end, the character image display device of the present invention includes a display device control microprocessor that controls the entire display device, a line interface, a keyboard, a display data buffer that stores character codes, and a display device that controls the entire display device. It is equipped with a character generator that converts it into a pattern, a display device, and a screen display control device that takes out the character code stored in the display data buffer and sends it to the character generator. In a character image display device that stores character codes sent via the circuit interface in the display data buffer and causes the display device to display characters based on the contents, the display data・Inside the battle,
In addition to providing a display buffer area for storing character codes of characters to be displayed on the display device and a temporary storage buffer area for temporarily storing character codes, the display device control processor If the command sent via Ace or the command given by the keyboard means to hold screen information, the display data sent from the line after that command is used for the temporary storage. If the above command means canceling screen information retention, the display data sent from the line after that command is stored in the display buffer area, and the above key/key is stored in the buffer area.
When the command from the board means to display the contents of the temporary memory buffer area, the contents are stored in the temporary memory buffer area on the condition that the screen information retention mode is in effect and the temporary memory buffer area is not empty. The present invention is characterized in that it is configured to perform a process of transferring the character code contained in the display to the display buffer area.

[Embodiments of the invention] Hereinafter, the present invention will be explained with reference to the drawings.

FIG. 1 is a system block diagram showing one embodiment of a character image display method according to the present invention, FIG. 2 is a diagram showing the configuration of a data buffer in a second embodiment of the present invention, and FIG. FIGS. 4 to 6 are flowcharts showing an example of the processing of the display device control processor used in the present invention. In the figure, 1
2 is a display device control processor, 2 is a line interface, 3 is a display data buffer, 4' is a display buffer area, 4'' is a temporary storage buffer area, 5 is a screen display control device, 6 is a character generator, 7 is the keyboard, 8 is the display device, 9 is the A/
N (Alpha Newmenic) Full Key Part, 1
0 is a retention mode display lamp, 11 is a screen information retention mode instruction key, A is a display area start address, and B
indicates a buffer area for display, C indicates a buffer area for undisplayed data, and D indicates a received data storage address.

In FIG. 1, a display device control processor 1 controls the entire display device, and when data is sent from a higher-level connected device via a line interface 2, the display device control processor 1 processes the data. Data For example, character code is display data.
It is stored in the display buffer area 4' of the buffer 3.
Character generator 6 stores character patterns corresponding to character codes. The screen display control device 5 takes out the character code stored in the display buffer area 4' in synchronization with the scanning of the display device 8, and supplies it to the character generator 6. The display buffer area 4' is where display data for one screen is normally stored, and in the present invention, in addition to the display buffer area 4', a temporary storage buffer area 4'' is also provided as the display data buffer 3. At the same time, a specific key is provided on the keyboard 7. Then, when a specific key on the keyboard 7 is operated, or a special control string is sent from the upper connection device via the line interface 2. If it is sent, the display device control processor 1 reads it and shifts to the display screen holding mode.In this display screen holding mode, display data is not sent via the line interface 2. When the data is received, the display device control processor 1 stores the data in the temporary storage buffer area 4'' instead of the display buffer area 4'. When the scroll and up keys are operated on the keyboard 7, the display device control processor 1 detects that this key has been pressed and displays the data stored in the temporary storage buffer area 4'' for the first time. The content of the data transferred to the display buffer area 4' is transferred to the screen display control device 5.
is displayed on the display device 8 under the control of. In this way, the contents of the display area can be changed by operating the keys on the keyboard 7.

Another example of the display data buffer 3 used in the present invention is shown in FIG. Display data buffer 3
Instead of using the inside as a display buffer or temporary storage buffer, the display area of display buffer area B can be started by operating the scroll up/down keys that control the amount of undisplayed received data and the display. Address A itself changes dynamically.
This movement results in scrolling of the display screen,
Up/down is performed. By configuring the display data buffer 3 in this manner, there is no need to transfer data within the display data buffer 3 in response to screen operations, which has the effect of improving processing performance.

An example of a keyboard used in the present invention is shown in FIG. In addition to the generally used A/N (alpha menu) full key section 9, the keyboard 7 includes a screen information retention mode key (for example, a lock key) 11 and a retention mode display lamp 1.
0 is set. An example of processing in the display device control processor 1 of the present invention when using the keyboard 7 having such a configuration will be described with reference to FIGS. 4 to 6.

First, when the screen information holding mode instruction key 11 is pressed, the display screen holding mode is set.

Turn on the holding mode indicator lamp 10.

The storage location of data sent from a higher-level connection device via a line interface 2 is switched to a temporary storage buffer area 4'' instead of a display buffer area 4'.

This completes the process for key operations.

Next, when the screen information holding mode instruction key 11 is released, the display screen holding mode is canceled.

Turn off the holding mode indicator lamp 10.

The storage location of data sent from the higher-level connection device via the line interface 2 is switched to the display buffer 4'.

This completes the process for key operations.

Next, if the scroll up key is pressed, check to see if the display is in hold mode.

If the answer is No, the process ends, and if the answer is Yes, perform the process.

Check whether temporary storage buffer area 4'' is empty.

If Yes, the process ends, and if No, performs the process.

One line of data is extracted from the temporary storage buffer area 4'' and transferred to the display buffer area 4'. When the data is transferred to the display buffer area 4', the data is displayed on the screen as described above. It is displayed on the display device 8 by the display control device 5.

This completes the process for key operations.

Note that the scroll and up keys are equipped with a typer-matic function in which the command is issued many times in succession if the keys are operated for a certain period of time or more. As a result, while the button is pressed, new lines are transferred one after another from the temporary storage buffer area 4'' to the display buffer area 4', and as a result, new lines are displayed one after another on the screen.

Even when a special control character string is sent from a higher-level connected device via the line interface 2, if the content is a screen information retention mode instruction, the subsequent processing is performed in the same way as in FIG.
If the content is to cancel the screen information holding mode instruction, the subsequent processing is performed in the same manner as in FIG. 5.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, the operator can appropriately control the display contents of the screen under the operator's control of the character or image drawing information sent from the upper-level connection device. , operability, and conversationability are improved.

[Brief explanation of drawings]

FIG. 1 is a system block diagram showing one embodiment of a character image display method according to the present invention, FIG. 2 is a diagram showing the configuration of a display data buffer in a second embodiment of the present invention, and FIG. 3 is a system block diagram showing an embodiment of a character image display method according to the present invention. FIGS. 4 to 6 are flow charts showing examples of processing of a display device control processor used in the present invention. DESCRIPTION OF SYMBOLS 1...Display device control processor, 2...Line interface, 3...Display data buffer, 4'...Buffer area for display, 4''...Buffer area for temporary storage,
5... Screen display control device, 6... Character generator, 7... Keyboard, 8... Display device, 9...
A/N full key section, 10...Holding mode display lamp,
11... Screen information holding mode instruction key, A... Display area start address, B... Buffer area for display, C... Buffer area for undisplayed data, D... Received data storage address.

Claims (1)

[Claims] 1 A display device control microprocessor that controls the entire display device, a line interface, and a key
A board, a display data buffer that stores character codes, a character generator that converts the character code into a character pattern, a display device, and a character generator that extracts the character code stored in the display data buffer. and a screen display control device that stores the character code sent from the host computer or other upper-level connection device via the line interface in the display data buffer, and displays the character code on the display device based on the content. In a character image display device that now displays characters, the display data buffer includes a display buffer area for storing the character code of the character to be displayed on the display device, and a display buffer area for storing the character code temporarily. In addition to providing a temporary storage buffer area for storing screen information, the display device control processor stores screen information by commands sent via the line interface or commands given by the keyboard. , the display data sent from the line after that command is stored in the buffer area for temporary storage,
When the above command means to cancel screen information retention, display data sent from the line after the command is stored in the display buffer area,
When the command from the keyboard indicates the display of the contents of the temporary memory buffer area, the temporary memory buffer area is displayed on the condition that the screen information retention mode is in effect and the temporary memory buffer area is not empty. A character image display method, characterized in that the character image display method is configured to perform a process of transferring character codes stored in the display buffer area to the display buffer area.