JPS62145282A - Character display control 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] [Field of Application of the Invention] The present invention relates to a screen display control method for a character display device, and in particular, when characters are displayed continuously on the screen, the character display speed can be controlled by operating the keyboard. This invention relates to a character display control method that can be changed.

[Background of the invention]

When displaying characters on a character display device, generally one line is displayed on the screen one by one, and when one line of text is finished being displayed,
The screen scrolls up one line and the next line is displayed in the empty line. Thereafter, the scrolling and displaying is repeated sequentially. Here, if the screen scrolling time of the screen display control device is constant, the screen will disappear sequentially from the top within a certain period of time.

When you want to view the display screen slowly, it is necessary to stop the screen or re-output the screen, resulting in a decrease in work efficiency.For this reason, a method that allows the screen scrolling speed to be adjusted by hardware on the character display device side. was devised. However, this method relies on the character display control device, so
There is a drawback that this function cannot be realized unless a character display device equipped with this method is used.

Incidentally, related known examples include a scroll control method, Japanese Patent Application Laid-Open No. 59-97182, a scroll control method, Japanese Patent Application Laid-Open No. 59-121089, and a display device.

There are Japanese Patent Application Laid-open No. 59-152478, etc.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a character display control method that allows an operator to select and implement the display speed of screens that are sequentially displayed and scrolled on a character display device, without depending on the character display device.

[Summary of the invention]

The present invention provides a delay time control table for controlling character display speed in an electronic computer system comprising a computer and a character display device equipped with a keyboard input function and a scroll function. , a mechanism that sets the value of a specific key in the delay time control table by pressing a specific key on the keyboard,
and a mechanism for changing the character display speed according to the values in the delay time control table is provided on the computer side.

[Embodiments of the invention]

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

FIG. 1 is a schematic diagram of the computer system. electronic computer 1
A central processing unit 20. There is a main memory 3o, in which an initialization program 35, a character input program 40, a display program 45, and a delay time control table 50 are arranged.

The electronic computer 10 and the character table device each have a central processing unit 2.
0 and an interface device [70, which inputs and outputs data. The interface device 70 is connected to a keyboard 90 and a screen display control device 80, and the screen control device 80 is further connected to the pure 100.

In general, when the screen display control device 80 becomes capable of displaying the screen, it issues a signal to the central processing unit 2o through the interface device 70, which causes an interrupt to be generated in the display program 45. is started. The display program 45 requests the character display device 60 to display a character string.

Waits for the next interrupt. The screen display control device 8o that has been requested to display the character string inputs the character string via the interface device 70 and displays it on the pure 100.

When the display ends, a next character string display enable signal is issued. This process is repeated sequentially. Here, the speed at which the screen display control device 80 is requested to display a character string, displays it on the Pure 100, and issues the next display enable signal is constant.

FIG. 2, FIG. 3, and FIG. 4 show example programs for implementing the present invention.

Figure 2 shows the initialization program.
Process the call only once. The initialization program sets the delay time control tape to the normal speed (BOX
llo).

FIG. 3 shows a character input program, which is activated by keying in on the keyboard 90 of FIG. The character input program judges the input character and branches to CTRL/x character (meaning pressing the CTRL key and a number key at the same time, hereinafter abbreviated) processing and other character processing (
Box 210).

In CTRL/x character processing, the value of X is set in the delay time control table (BOX 220). On the other hand, in other character processing, each character is processed (BOx330).

FIG. 4 shows a display program, which is started when the character display device 60 of FIG. 1 becomes ready for screen display. The display program should judge the contents of the delay time control table.B
OX310), CTRL/X waits for X seconds (BOX320), delays the time, and requests the CRT display device to display a character string (BOX330).
. Here, the waiting process may use a waiting function prepared by each O3 (operating system).

If it is not CT RL / x, the character string display request is immediately made without waiting.

FIG. 5 is a flow chart showing an embodiment of the present invention in chronological order. When starting up the system, set O (normal speed) in the delay time control table (BOX 4)
10). When performing screen display, the display program is in a waiting state, but when a display enable signal is issued from the CRT display device (B○x420), the display program is activated by an interrupt. Since the content of the delay time control table is 0, the display program requests the CRT display device to display the character string without waiting (BOX 43o).
. The CRT display device displays the screen (
BOX440). When the screen display is completed, a screen display enable signal is issued, and the display process is repeated in sequence.Up to this point, since the content of the delay time control table is 0, normal speed display is performed.

Here, if the operator wants to switch to low speed display.

Key in CT RL/x from the keyboard (
BOX450). The CRT display device transmits the character code CTRL/x to the central processing unit (BOX 460). When the character code is transmitted, a character input program is activated by an interrupt. The character input program sets X in the delay time control table using the input character CTRL/X and ends the process (BOX 470).
During this time, the display program continues processing, but when a display enable signal is issued from the secondary CRT display device (BOX 480), the display program is activated in the same manner as described above. has been changed to X, so wait for X seconds (B○X4
90) After waiting, a character string display request is made to the CRT display device (BOX 500). The CRT display device receives this and displays the screen (BOX 510). When the screen display is completed, a screen display enable signal is issued to the central processing unit, and the display process is sequentially repeated. This latter half of the repetitive BOX 480 to 510) process is a low-speed display process. In this way, the longer the waiting time is, the longer it takes to request a character string display, and the slower the screen display speed becomes.

Although the above embodiments were realized by a program in the host computer, this delay mechanism can also be implemented by a microprogram in the host computer. in this case.

This can be achieved without reducing the overhead of the host computer.

〔Effect of the invention〕

According to the present invention, since the speed of character display can be changed without depending on the character display device, the character display device can be replaced for a character display device that does not have a scroll speed adjustment function or for a system that is already in operation. It is possible to provide the ability to change speeds without having to do so.

In addition, the screen display speed can be changed with a simple keyboard operation, which improves operability and work efficiency when searching for specific characters or patterns, printing screen display data on a printing device, etc. can be achieved.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of a computer system according to an embodiment of the present invention, FIG. 2 is a flowchart of an initialization program, FIG. 3 is a flowchart of a character input program, and FIG. 4 is a flowchart of a display program. Flowchart FIG. 5 is a flowchart of one embodiment of the present invention. 10...Electronic computer, 20...Central processing unit, 30
...Main memory, 60...Character display device, 70...
Interface device, 80... Screen display control device, 9
0...Keyboard, 100...Pure.

Claims (1)

[Claims] 1. In an electronic computer system consisting of a computer and a character display device equipped with a keyboard input function and a scroll function, a delay time control table for controlling character display speed, and initializing this delay time control table. A mechanism is provided on the computer side, a mechanism for setting the value of a specific key in the delay time control table by pressing a specific key on the keyboard, and a mechanism for changing the character display speed according to the value in the delay time control table. Character display control method.