JPS5813913B2 - Display control system with virtual screen service - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a display control system having a virtual screen service, in particular, when controlling a CRT display device, etc., only a logical screen (virtual screen) is considered, without being limited by the size of the real screen. The present invention relates to a display control system that is capable of performing display control.

When displaying a certain display on a CRT display device,
It is extremely troublesome to check each time the correspondence between the screen desired to be displayed and the screen that can actually be displayed, taking into account the size of the screen on the CRT display device, that is, the actual screen.

For this reason, display/input/control requests from programs are not limited to the size of the physical screen (real screen), but are performed with only the logical screen (virtual screen) in mind. will be considered.

Such a service will be referred to as a virtual screen service.

As an extension of such services, one real screen is also divided and used by a plurality of virtual screens, and this is called a multiple virtual screen service.

Generally, one virtual screen is divided into multiple frames, and when displaying one virtual screen as a real screen, there is a one-to-one correspondence with the frame on the real screen (i.e., it is fixedly displayed on the real screen). ) frames are called fixed frames, and frames that correspond 1:n to frames on the real screen (that is, are switched and displayed on the real screen) are called virtual frames.

The process of automatically scrolling up/down so that the plurality of virtual frames appear one after another on the real screen is called automatic scroll control.

Note that automatic scroll control is performed by display from a program or a function key.

An object of the present invention is to provide a display control system capable of performing the above-mentioned virtual screen service.
A screen control that stores the format table and control information about the frame to be displayed.
The purpose is to enable the above services to be performed automatically by creating blocks, etc.

To avoid this, the display control system with virtual screen service of the present invention includes a display device having function keys, real screen control information related to the display screen currently displayed on the real screen of the display device, and In a display control system that is equipped with a display control block that controls the real screen based on the information and displays on the real screen of the display device, it corresponds to the screen that you want to display regardless of the size of the real screen. a screen that is created corresponding to each virtual screen and stores descriptive information regarding the virtual screen and the frames constituting the virtual screen;
a format table, a screen control block that is created corresponding to each virtual screen and stores control information regarding frames to be displayed for the virtual screen, and display data regarding the frames of the virtual screen is transferred and stored; It has a plurality of frame control blocks and a data storage area provided on the main memory, and when displaying one or more of the virtual screens on the real screen, The display data of the frame to be displayed on the virtual screen is transferred onto the frame control block, and the frame control block to which the display data has been transferred is linked via the screen control block. The display data transferred onto the frame control block is displayed on the actual screen.

This will be explained below with reference to the drawings.

FIG. 1 shows the configuration of an embodiment of the present invention, and FIG. 2 shows the processing mode.

In FIG. 1, 1 is a CRT display device, 2 is a real screen, 3 is a function key, 4-1, 4-2, .
. . . is a virtual screen divided by a plurality of frames, and 5 represents a main storage device.

A display control block (hereinafter referred to as DCB) 6 stores information for controlling the real screen that is actually displayed on the real screen.

Note that the DCB 6 is divided into an active screen area and a function key description area.

7-1, 7-2, . . . are husband screen format tables (hereinafter referred to as SFT), which are provided corresponding to, for example, one virtual screen.

The SFT has a screen description section that describes the frame structure of the virtual screen.

In addition, SFT has a frame description section corresponding to each frame, and the frame description section contains (1) whether the frame is a fixed frame or a virtual frame, (i
i) Information such as the row position of the frame on the virtual screen, and (211) if it is a virtual frame, how many other virtual frames exist are described 68- 1.8-2, . . . are husband screen control blocks (hereinafter referred to as SCBs), which are provided corresponding to, for example, one virtual screen.

\V stores a pointer for linking to a frame control block, which will be described later.

9-1, 9-2, . . . are frame control blocks (hereinafter referred to as PCBs), which exist in common on each virtual screen.

Then, when one virtual screen is to be displayed, display data corresponding to each frame of the virtual screen is transferred and stored, and from there is transferred to the display device 1 to create a real screen.

Each FCB has a pointer, so that when display data is stored as described above, it is linked to other PCBs in which other frames belonging to the same virtual screen are stored.

10 is a data storage area on the main storage device, and is a data storage area for display data DATA. A, DATA. B, . . . , etc. are stored, and display data is transferred from here to the PCB.

Before the first request for virtual screen display is made, there is generally no link between SCB 8 and FCB 9, and no display data is stored in FCB 9.

Under this state, when a request for display/input/control for one virtual screen is issued, the virtual screen, for example 4-1
It is checked whether PCBs have been generated for frames A, B, and C corresponding to .

That is, with reference to SFT 7-1, the line position of a certain frame, for example, frame A, is found on the virtual screen 4-1, and the line position when displayed on the real screen is calculated.
Also, information such as whether the frame A is a fixed frame or a virtual frame is written in one PCB, for example, FCB9-1, and the start address ADRS. of FCB9-1 is written to the pointer of SCB8-1. Write 1.

Then, display data DATA.corresponding to frame A is sent from the data area 10. Transfer A to FCB9-1.

Similarly, FCB9-3 is generated for frame B,
At this time, the start address ADH8.3 of FCB 9-3 is written to the pointer on FCB 9-1.

FCB9-2 is similarly generated for frame C as well.

Also when displaying the virtual screen 4-2, an FCB 9-5 is generated corresponding to, for example, frame D on the virtual screen 4-2.

At this time, if there is no possibility that the display related to the previously displayed virtual screen 4-1 will be performed for the time being, the previously generated FCB 9-1.9-3.9-2 is released.

However, if there is still a possibility that it will be displayed in the future, a new virtual screen 4-2 will be created without releasing the above PCB.
PCB9-5 and so on are generated.

If fixed frame A and one virtual frame C of virtual screen 4-1 are currently being displayed on real screen 2 by a program or a function key operation by an operator, this is indicated on DCB 6. , the DC
The pointer in B5 points to SCB8-1.

This causes the pointer ADRS. 1
Based on the pointer ADH8.3 in FCB9-1, FCB9-1 also points to FCB9-1.
Pointer ADRS. in B9-3. 2 by FCB9-2
are linked, and display data DATA. in each FCB is linked. A, DATA. B, DATA. C is transferred to the CRT display device 1.

However, display data DATA. in FCB9-3 corresponding to virtual frame B. B is not transferred to the display device 1 because the instruction in the DCB 6 is to display the virtual frame C (#1VS, A+C shown in the figure)L.

When the scroll control instructs to display virtual frame B instead of virtual frame C, the display corresponding to frame C is erased on real screen 2, and FCB9-1
Data in DATA. A and data DA in FCB9-3
T.A. B is transferred to the display device 1 side.

That is, scroll control may be considered to be performed by rewriting the contents of the DCB.

Also, frame C on the virtual screen 4-1 and virtual screen 4-
When performing a multiple virtual screen service in which frame D in 2 is displayed on one real screen, it is performed as follows.

Of course, at this time, the FCB 9-1 corresponding to the virtual screen 4-1
．． 9-3. FCB9 corresponding to 9-2 and virtual screen 4-2
-5, . . . are also generated.

In this state, when frames A and C are displayed on the real screen 2 as described above, the display of frame A is erased, the display of frame C is not erased, and the frame D is displayed on the virtual screen 4-2. Write the display on DCB6.

As a result, DCB6 uses the pointer to send SCB8-
2 and PCB9 by the pointer of SCB8-2.
-5 is indicated.

Then, the display corresponding to frame D is displayed in an overlapping manner on the real screen 2.

That is, frame D and frame C are displayed.

FIG. 2 shows a processing aspect of the present invention.

When trying to display the virtual screen, for example 4-1, first S
Initialization of CB8-1 and registration of SFT7-1 are performed.

Along with this, input is performed on the virtual screen 4-1, and as explained with reference to FIG.
Linking with B9-1.9-3.9-2 is performed, and P
CB9-1, . . . display data DATA. A,
... is transferred and stored.

Next, as explained with reference to FIG.
1 is specified and the screen is displayed.

To erase all or part of the virtual screen 4-1, use SCB.
8-1, and virtual screen switching is performed under control of the DCB 6.

During this time, scroll control and multiple virtual screen services are performed as necessary.

When the display on one virtual screen 4-1 is finished, the virtual frame is fixed and released, and the SCB 8-1 and FC
The link with B9-1.9-3.9-2 is released, and finally SFT7-1, SCB8-1, and FCB9-1.9-
3.9-2 and her husband are released.

As explained above, according to the present invention, when displaying a screen, the user or operator does not need to check each time the correspondence between the screen that he or she actually wants to display and the screen that can be displayed, and is conscious only of the screen that he or she actually wants to display. All you need to do is to do this, and the display will be extremely easy to deal with.

In addition, a screen format table (SFT) 7 and a screen control block (SCB) 8 are set corresponding to the virtual screen, and a link is made with the frame control block (PCB) 9 during display processing. ing.

Therefore, flexibility in the frame configuration on the virtual screen 4 is increased, and the display managing the display on the real screen 2
The above SC by control block (DCB) 6
Desired display can be performed simply by linking with B8.

[Brief explanation of the drawing]

FIG. 1 shows the configuration of an embodiment of the present invention, and FIG. 2 shows the processing mode. In the figure, 1 is a display device, 2 is a real screen, 3 is a function key, 4 is a virtual screen, 5 is a main storage device, 6 is a display control block, 7 is a screen format table, and 8 is a screen format table. Control block 9 represents a frame control block, and 10 represents a data storage area.

Claims (1)

[Scope of Claims] 1. A display device having function keys, storing real screen control information related to the display screen currently displayed on the real screen of the display device, and controlling the real screen based on the information. In a display control system that displays on the real screen of the display device, the display control system includes a display control block that performs and a screen format table that is created corresponding to each virtual screen and stores descriptive information regarding the virtual screen and the frames that make up the virtual screen; and a screen control block that stores control information regarding frames to be displayed on the virtual screen, a plurality of frame control blocks to which display data regarding the frames of the virtual screen is transferred and stored, and a main storage device. When displaying one or more of the virtual screens on the real screen, the display data of the frame to be displayed for each virtual screen is stored in the frame.・
The frame control block that has received the display data is controlled to be linked via the screen control block, and the display that is being transferred onto the frame control block. A display control system having a virtual screen service, characterized in that data is displayed on the real screen. 2. The display control block is controlled to select the screen control block linking the frame control block by having information written in its content. A display control system with virtual screen services as described. 3. The plurality of frame control blocks are linked to each other in correspondence with the plurality of virtual screens, and the display control block is configured to perform display on one of the plurality of virtual screens and then A display control system having a virtual screen service according to claim 2, characterized in that the selection of screen control blocks is switched so as to perform a display corresponding to another virtual screen without erasing the display. . 4 The frame control block has control information in its contents, and the display control block uses the control information to display a display based on a screen control block that is linked to one virtual screen. 4. A display control system having a virtual screen service according to claim 2 or 3, wherein the display control system is controlled to select a virtual screen service.