JPS63282522A - Multiple picture control system - Google Patents

Abstract

PURPOSE:To improve efficiency by allowing a real image constitution controller to start real picture constitution a certain time after the initial writing to a memory stored with virtual picture display information is started. CONSTITUTION:An address detector 8 detects tasks 3 and 4 storing display information in virtual picture memories 5 and 6 by comparing addresses and a timer 9 where a specific timer time is set is provided. Namely, the real picture constitution controllers starts the real picture constitution the certain time after the initial writing to the virtual picture memories 5 and 6 is started. Consequently, the system is used without rewriting original codes and the efficiency is higher than that of a system where the OS intervenues at each time; and the time until the start of the picture constitution control part is secured, so constant response is also secured.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a multiple screen control method that multiplexes and outputs a plurality of independent dynamic screen images processed by an information processing device to the same output device. In particular, the present invention relates to a display screen control technique when a conventional process that has real resources and is processed using these resources is operated as one task under a new virtual resource environment.

[Conventional technology]

Conventionally, this type of multi-screen control technology has consisted of a memory that stores information to be displayed on the screen (hereinafter referred to as real screen memory), a screen display control device, and a memory that stores virtual screen display information (hereinafter referred to as real screen memory). When a task writes to the virtual screen memory, the operating system (hereinafter referred to as O8) writes to the virtual screen memory and then uses a screen configuration control device to write to the virtual screen memory. There are methods for controlling the configuration. This method includes two methods: a method in which the task rewrites the write to the virtual screen memory into an O8 system call (method 1), and a method in which the task traps the write to the virtual screen memory and controls the OS.
There is a method (Method 2) in which the data is transferred to

Furthermore, there is a method of periodically configuring the screen independently of writing tasks to the virtual screen memory.

This method includes a method that periodically rewrites the entire screen (method 3), and a device that stores and stores written addresses and data without actually taking up memory in the virtual screen memory area. There is a method (method 4) in which a real screen is prepared and the real screen is periodically configured.

[Problem that the invention seeks to solve]

However, the conventional multi-screen control method described above has real resources, and the conventional processing using these resources is
When operating as one task under a new virtual resource environment, in method 1, the part where the conventional processing writes to the virtual screen memory must be rewritten into an O8 system call. It cannot be used without rewriting the original code, and in method 2,
Every time the conventional processing described above writes to the virtual screen memory, O8 intervenes, so the performance decreases due to the overhead, and in method 3, the conventional processing writes to the virtual screen memory. Since the entire screen is periodically rewritten even when the virtual screen is not being used, performance deteriorates due to the overhead.Moreover, in method 4, special equipment is required, which limits the number of virtual screens. There are drawbacks.

SUMMARY OF THE INVENTION An object of the present invention is to provide a multi-screen control method that can overcome the above-mentioned drawbacks.

[Means for solving problems]

The multiple screen control method of the present invention includes a screen display device that stores information to be displayed on a screen in a first memory in advance and reads out the first memory in synchronization with screen scanning to configure a display image; a second memory that stores screen display information independent of the first memory; a real screen configuration control device that configures a real screen by overlapping a plurality of virtual screens from the second memory; The present invention is characterized by comprising means for causing the real screen configuration control device to start configuring the real screen after a predetermined period of time after the first writing to the memory occurs.

[Effect]

The multi-screen control method of the present invention uses a method in which the real screen configuration control device starts real screen configuration after a certain period of time after the first writing to the memory that stores virtual screen display information occurs. This eliminates the need to rewrite code, and it is also efficient because the screen configuration can be done at once for a large number of entries within a certain period of time (and a certain level of responsiveness is also guaranteed. A simple means for starting screen configuration is also sufficient.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram showing an example of a multi-screen control device for explaining an embodiment of the present invention.

As shown in FIG. 1, this device includes a real screen memory 1, a screen display control device 2, tasks 3 and 4, and virtual screen memories 5 and 6.
and a screen configuration control device 7, and further includes an access detection device 8 and a timer 9.

The real screen memory 1 stores information to be displayed on the screen in advance. The screen display control device 2 reads out the real screen memory 1 in synchronization with screen scanning and composes a display image. The real screen memory 1 and the screen display control device 2 constitute a screen display device. The virtual screen memories 5 and 6 store information displayed on the screen by the tasks 3 and 4 under the virtual resource environment. Reference numeral 7 denotes a screen configuration control device, which configures the real screen for each virtual screen stored in the virtual screen memories 5 and 6 according to the set display target portion, the mapping position to the real screen, the magnification, and the overlapping condition of the screens. An image is constructed and stored in the real screen memory 1.

Using these real screen memory 1, screen display control device 2, virtual screen memories 5 and 6, and screen configuration control device 7, the conventional multi-screen control methods according to method 1 and method 2 are realized.

In this way, information to be displayed on the screen is stored in advance in the real screen memory 1.
a screen display device that stores screen display information in the real screen memory 1 and reads out the real screen memory 1 in synchronization with screen scanning to form a display image; and virtual screen memories 5 and 6 that store screen display information independent of the real screen memory 1; In a multi-screen control method using a real screen configuration control device that configures a real screen by superimposing a plurality of virtual screens, in this embodiment, task 3.4 is performed using the virtual screen memory 5, An address detection device 8 is provided for detecting that display information is stored in the virtual screen memory 5 by comparing addresses, and a timer 9 to which a predetermined timer time is set is provided.
, 6, the real screen configuration control device starts real screen configuration after a certain period of time.

Next, the operations of the access detection device 8 and the timer 9 will be explained. When the access detection device 8 detects that tasks 3 and 4 have stored display information in the virtual screen memories 5 and 6 by comparing addresses, The detection output is supplied to timer 9. The timer 9 controls the screen configuration control device 7 after a certain period of time after receiving the first notification from the access detection device 8 that an access to the virtual screen memory has been detected.
Informs the operator of the opportunity to start screen configuration control.

When the timer 9 notifies the screen configuration control device 7 of the opportunity to start screen configuration control, the timer 9 waits again for the first notification from the access detection device 8 notifying that access to the virtual screen memory has been detected. .

In this way, real screen configuration is started after a certain period of time after the first write to the virtual screen memories 5 and 6 occurs, and according to this method, the original code can be used without being rewritten. In addition, this method is more efficient than a method in which O3 intervenes each time, and a certain level of responsiveness is also guaranteed because the time until the screen configuration control section is activated is guaranteed.

Furthermore, in this multiple screen control method, real screen memo IJ1,
In addition to the screen display control device 2, virtual screen memories 5 and 6, and screen configuration control device 7, multiple screen control can be realized using an access detection device 8 and a timer 9 as means for starting real screen configuration after a certain period of time, All you need to do is add a simple configuration.

〔Effect of the invention〕

As explained above, the present invention utilizes a method in which the real screen configuration control device starts real screen configuration after a certain period of time after the first writing to the memory that stores virtual screen display information. It has a new virtual resource environment, and the conventional processing that was performed using this can be
When operating as a task, the original code can be used without being rewritten, and the conventional processing described above can be performed as is, writing to the virtual screen memory as is. Since the screen configuration is performed by the O8 every time, it is more efficient than when the O8 intervenes every time, and the time from the first writing to the virtual screen memory in the conventional processing described above to the activation of the screen configuration control unit is guaranteed. This has the effect of guaranteeing a certain level of responsiveness, and the configuration is simple.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing a multiple screen control method according to an embodiment of the present invention. 1...Real screen memory 2...Screen display control device 3.4...Task under virtual resource environment 5.6...Virtual screen memory 7...Screen configuration control device 8... Access detection device 9... Timer

Claims (1)

[Claims] (1) A screen display device that stores information to be displayed on a screen in a first memory in advance and reads out the first memory in synchronization with screen scanning to configure a display image; What is the first memory? a second memory that stores independent screen display information; a real screen configuration control device that configures a real screen by overlapping a plurality of virtual screens from the second memory; and a first write to the second memory. and means for causing the real screen configuration control device to start real screen configuration after a predetermined period of time after occurrence of the multiple screen control method.