JPH0258095A - Image plane display controller - Google Patents

Abstract

PURPOSE:To make a diverse and complicate image display by dividing a display screen longitudinally, enabling the respective divided image planes to be scrolled longitudinally by mutually independent scroll quantities, and selecting entire scrolling or divisional scrolling with a switching signal. CONSTITUTION:Pieces of image information of two image planes A and B are prepared for one display screen and the pieces of image information for the image planes A and B are put together. An image screen table area 24 is provided with a table area 24A for the image plane A and a table area 24B for the image plane B, pattern names and priority levels are stored in those areas corresponding to respective cells, and the priority levels are compared to display a pattern with higher priority first. Namely, characters are embossed in the background. For said operation, information to be displayed is stored in an image information area 20, the entire image plane is scrolled with the switching signal, and vertical independent divided image planes are scrolled by their scroll quantities to obtain a desired image.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a screen display control device that displays image information stored in an image information memory on a display screen.

[Prior Art] In order to display a desired image on a display screen in a video game, image information such as characters and backgrounds is stored in an image information memory, including the positional relationship in which they should be displayed, and then image information is stored in the image information memory. This is done by reading and displaying image information.

At that time, the display screen is often scrolled vertically or horizontally.For example, when a character moves horizontally or vertically, the character is fixed by the screen display control device and the background screen is can be scrolled horizontally or vertically.

[Problem to be solved by the invention] In such a video game, fiI! There have been requests from players and players to divide the display screen and scroll each divided screen separately so that the display screen does not change. In video games, images are displayed by scanning horizontally in the same way as in normal TV broadcasting, so although it was possible to scroll the horizontally divided screen independently, the screen was divided vertically. It was not possible to scroll the screen independently.

The present invention has been made in consideration of the above circumstances, and an object of the present invention is to provide a screen display control device that can vertically scroll each divided screen in which a display screen is vertically divided by mutually independent scrolling amounts. shall be.

[Means for Solving the Problems] A screen display control device according to the present invention includes a scroll amount memory storing the vertical division scroll amount of each divided screen in which the display screen is divided vertically, and adding means for generating scroll data by adding the vertical scroll amount read from the scroll amount memory based on the horizontal position signal indicating the position of the display screen to the vertical position signal indicating the vertical position of the display screen; image generating means for reading out and generating image information to be displayed at the horizontal position and -f, f direction position of the display screen from the image information memory based on the scroll data generated by the adding means; It is characterized in that each divided screen of the display screen is scrolled in the vertical direction by mutually independent scrolling amounts.

[Operation] Since the present invention is configured as described above, the scroll amount corresponding to the horizontal position of the display screen is read out from the scroll amount memory and added to the Mi position signal, and the scroll amount that varies depending on each divided screen of the display screen is read out from the scroll amount memory and added to the Mi position signal. Scroll by amount.

[Example] The present invention will be explained below based on an illustrated embodiment.

FIG. 1 shows a screen display control device according to an embodiment of the present invention. Before a detailed explanation of the 0-screen display control device, a screen display method in this embodiment will be explained.

As shown in FIG. 2, each point on the display screen 10 is expressed by a horizontal dot position signal H and a vertical line position f word V.

Fixed vertical line position signal ■ and horizontal dot position signal H
Horizontal scanning is performed by changing from right to left,
This horizontal scanning is sequentially moved from the top to the bottom of the display screen 10 to scan the entire screen.

In this embodiment, the display screen 10 has 256 lines vertically and 256 lines horizontally.
The entire screen is divided into units of 8×8 dot cells 12. Therefore, vertical 3
The screen will be composed of 2 cells and 32 cells horizontally.

The image information to be displayed on this screen 10 is stored in the image information memory 20 shown in FIG.
stores the name of the pattern to be displayed in the memory corresponding to each cell 12 described above, and separately stores each pattern itself. That is, the image information memory 20
As shown in FIG. 1A, it is divided into a pattern area 22 in which each pattern itself is stored, and a screen table area 24 in which the pattern name to be displayed in each cell 12 is stored.

The pattern area 22 stores a pattern name and the pattern itself. The details of the pattern area 22 are
Shown in Figures (b) and fc). That is, the pattern "A" with the pattern name roolj, which is the first pattern in the pattern area 22 in FIG. 3(a), has 8 dots in the horizontal direction as one unit, as shown in FIG. 3(b). Lines are stored. The pattern “A” is shown in Figure 3 (C
) is stored as an 8×8 dot pattern.

In this embodiment, image information for two screens A and B is prepared for one display screen, and the image information for screen A and the image @ information for screen B are combined. Therefore, the screen table area 24 is divided into a table area 24A for screen A and a table area 24B for 8 screens.
4A and 24B store pattern names and priorities to be displayed corresponding to each cell. The priority is the pattern name stored in the table area 24A and the table area 24B.
This serves as a standard for selecting which of the pattern names stored in . Priority and table area 24 stored in table area 24A for each cell
Compare the priorities stored in B and select the pattern with the higher priority as the image to be displayed.0 For example, screen A is a screen with a background of mountains, trees, etc., and screen B is a character screen. If the priority of the character pattern is set higher than the priority of the background pattern, a display screen will be created in which the character is displayed in the background when screen A and screen B are combined. Also, certain patterns in the background (e.g.
If only the priority of the tree pattern is set higher than the priority of the character pattern, a display screen in which the character is hidden behind the trees in the background can be obtained.

Note that pattern names and priorities corresponding to screens that change from moment to moment are written in the table area 24 of the image information memory 20, and the screen display control device of this embodiment uses the image information in the table areas 24A and 24B. The resulting image will be displayed on the display screen.

Next, a screen display control device according to this embodiment will be explained with reference to FIG.

The circuit shown in FIG. Scroll data of a value indicated by signal H is generated.

The screen display control device of this embodiment can be controlled to scroll the entire display screen 10 using the whole/division switching signal, or can be controlled to scroll the entire display screen 10 by vertically dividing the display screen 10 into 16 vertically long divisions of 2 cells each. You can also scroll each screen by a different amount.

The scroll amount memory 30 stores the total scroll amount n as shown in FIG. A, nos and divided scroll amount n of each divided screen IA, n 18. n 2A% n za,
... are stored for each screen A and B. These whole scroll in. A, nos, or the divided scroll amounts n1^, n+s, nz^, n2e, . . . of each divided screen are written in advance in a scroll amount memory by a writing circuit (not shown).

FIG. 1 (The address converter 32 of aJ converts the horizontal dot position signal H to a predetermined address in the scroll amount memory 30 so as to read the scroll amount according to the horizontal dot position based on the whole/division switching signal. When the whole/division switching signal indicates the whole, it is converted to the address of the same whole scroll amount regardless of the horizontal dot position signal H.

When the whole/division cut PA signal indicates division, in this embodiment, if the horizontal dot position signal H is at 1 to 16 dot positions,
If the horizontal dot position signal H is from 17 to 32 dots,
3. Converted to the address of 4 cell division scroll amount.

The following description will be made assuming that division is selected by the whole/division switching signal.

Since the horizontal dot position signal H outputs a signal for screen A and a signal for screen B as signals for the same dot position, the address is converted by the address converter 32 to an address corresponding to the signal, and the scroll amount is Scroll amount of screen A and screen B from memory 30 n+^, n+e, nz^, n
2B, . . . are read out.

The read scroll data t^, n2a, . . . of each screen are latched by the latches 34A, 34B in synchronization with the horizontal position signal H, respectively.

Scroll of screen A l n IA, n 2A,...
is latched by the latch 34A, and the scroll amount n of screen B is
le, nzs, . . . are latched by latch 34B.

Scroll amount 1' launched in latches 34A and 34B
llA%n1ll, n2A%n21+, . . . are sequentially selected by the selector 36 in accordance with the horizontal dot position signal H. The scrolls selected by this selector 36 are in IA, n le, n 2A, n2a, .
... is input to the adder 38 and added to the vertical line position signal ■. That is, the scroll jE n IA, n +s, nxA, n2g, etc. according to the horizontal dot position.
. is read from the scroll amount memory 30 and added to the vertical line signal ■. The output of the adder 38 is the scroll amount n1^, n1ll, n2^, nz at the vertical line position.
e, °.

The vertical position is the scroll data.

Similar processing is performed on screens A and B, and the adder 38 outputs scroll data for screen A and scroll data for screen B alternately.

The circuit shown in FIG. 1B scrolls the image information from the image information memory 20 based on the scroll data and displays it on the display screen 10.

The upper bits of the scroll data are converted by the address converter 40 into addresses of image information to be successively output from the table area 24. That is, it is converted into the address of the image information to be read out in the table area 24 indicating the standard image in a non-scrolling state.

The image information memory 20 is accessed using the address from the address converter 40, and the pattern name and priority of the address are read out and held in the latch 42.

Using the pattern name latched by the latch 42, the scroll control unit 48 determines which line of the pattern is to be displayed. The pattern name to be displayed is latched in the latch 42, and the scroll control unit 48 scrolls the pattern with this pattern name using the lower bits of the scroll data, and determines whether the same line of the pattern should be displayed in the end. decide. The output signal of the scroll control section 48 is converted into a storage address of the pattern area 22 by the address conversion section 44 . When the pattern area 22 is accessed using this address, one line of actual pattern data is latched into the latch 46. That is, the pattern name to be displayed is selected from the table area 24 of the image information memory 20 by the upper focus of the scroll data, and which line of data of the pattern based on the pattern name should be displayed by the lower bit of the scroll data. is selected. In order to obtain the dot/dot information to be displayed determined by the scroll control section 48, the address conversion section 44 converts it into a storage address of the pattern area 22. When the pattern area 22 is accessed using this address, the final dot information to be displayed is held in the latch 46 and output to the selector 50.

The above-described processing is performed on the scroll data of screen A and the scroll data of screen B, and the pattern name and priority of screen A are latched in the latch X12, and the selector 50
holds dot information to be displayed. selector 50
compares the priority of the screen A and the priority of the screen B launched by the latch 42, and outputs dot information of the screen to be prioritized to the display circuit 52.

Display mouth RL? I52 displays an image on the display screen 10 based on the dot information from the selector 50. When the screen is scanned by an H counter (not shown) and a V counter (not shown), the display image stored in the image information memory 20 changes to the divided scroll amount n IA,n +e stored in the scroll amount memory 30. , n2A, n211, . As a result, as shown in FIG. 5, each divided screen of the display screen 10 has mutually independent scroll amounts nlA, n+s, nzA, n2e, . . .
You can scroll in the shrinking direction with .

In addition, if the whole/division switching signal indicates the whole,
No matter what value the horizontal dot position signal H has, the total scroll amount n is stored in the scroll amount memory 30. A.noe
is read out, and the entire tree on the display screen 1o is scrolled.

As described above, according to this embodiment, each of the divided screens obtained by dividing the display screen in the contraction direction can be scrolled in the contraction direction by mutually independent scroll amounts. Further, since it is possible to select between full scrolling and divided scrolling using a switching signal, more diverse and complex screen displays are possible.

The present invention is not limited to the above-mentioned embodiments, and various modifications are possible.

For example, if there is no need to switch between full scroll and split scroll in the middle of screen display control, the storage area for the full scroll amount may be included in the storage area for split scroll amount in the scroll amount memory. The amount need not be stored in the scroll amount memory. Furthermore, it goes without saying that the screen display method of the above embodiment is just an example, and the present invention can be applied to other screen display methods.

[Effects of the Invention] As described above, according to the present invention, each of the divided screens obtained by dividing the display screen in the vertical direction can be scrolled in the vertical direction by mutually independent scrolling amounts.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a screen display control device according to an embodiment of the present invention, FIGS. 2 and 3 are explanatory diagrams of a screen display method in the screen display control device, and FIG. 4 is a block diagram of a screen display control device according to an embodiment of the present invention. FIG. 5, which is a diagram showing the scroll amount memory, is an explanatory diagram of divided scrolling by the same screen display control device. DESCRIPTION OF SYMBOLS 10...Display screen, 12...Cell, 20...Image information memory, 22...Pattern area, 24...Table area, 30...Scroll amount memory, 32...
Address conversion unit, 34A, 34B...Latch, 36.
...Selector, 38...Adder, 40...Address converter, 42...Latch, 44...Address converter, 46...Latch, 48...Scroll control unit, 5
0... Selector, 52... Display circuit. Applicant SEGA Enterprises Co., Ltd. Agent Patent attorney Yoshihito Kitano (cL) Procedural amendments Display of the September 20, 1988 incident Patent application No. 209248 of 1988 Name of the invention Screen display control device Amendment Relationship with the case of a person who does

Claims (1)

[Claims] In a screen display control device that displays image information stored in an image information memory on a display screen, there is provided a scroll in which a vertical division scroll amount of each divided screen obtained by vertically dividing a display screen is stored. adding the vertical scroll amount read from the scroll amount memory based on the horizontal position signal indicating the horizontal position of the display screen to the vertical position signal indicating the vertical position of the display screen; addition means for generating scroll data; and an image for generating image information to be displayed at the horizontal and vertical positions of the display screen by reading it from the image information memory based on the scroll data generated by the addition means. 1. A screen display control device comprising: generating means, and scrolling each divided screen of a display screen vertically by mutually independent scrolling amounts.