JPH04140795A - Display controller - Google Patents

Abstract

PURPOSE:To speed up a window display by providing a rearrangement device which rearranges memory areas of a frame memory, window by window, and a window controller which specifies the up-down relation, sizes, positions of the windows displayed on a display. CONSTITUTION:A central processing unit 1 divides the frame memory 14 into the areas, window by window, by using the memory rearrangement device. The window controller 13 specifies the up-down relation, sizes, and positions of the windows. A display controller 15 reads the frame memory 14 through the memory rearrangement device 12 under the control of the window controller 13 and converts the read data into a display signal, which is displayed on the display 16. Therefore, software can alters the up-down relation and positions of the windows by altering respective parameters for the window controller and the memory rearrangement device.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is a display ii! of a terminal device of a computer system that uses a multi-window method as a screen display method. Regarding JR equipment.

Conventional technology In recent years, as computer systems have become more sophisticated,
Improvements are being made so that display devices serving as terminal devices can display as much information as possible. FIG. 3 shows the configuration of a conventional display control device that controls this display device. Conventionally, this type of display control device uses a memory (hereinafter referred to as frame memory) that is allocated memory corresponding to the dots on the screen, that is, a bit map method, and uses a bit map method to map any dot on the screen. In other words, as shown in Figure 3, the components are 31, a central processing unit, and when screen data is written to the frame memory 32 by a program, the screen data 33 is The display controller reads the contents and displays them on the display 34. Therefore, the frame memory 3
When a memory at any location in 2 is manipulated, the corresponding dot on the screen lights up or disappears.

A multi-window display is an application of the bit map display. As shown in FIG. 2, this is a method in which the display 21 is divided into rectangular sections called windows 22 so that a plurality of programs can be individually displayed simultaneously and without inconsistency among the programs. Usually, the window 22 can be arranged in a vertical relationship, and the limited area of the display 21 can be used effectively.

Conventional hit-map displays require clipping processing for the display of windows when they overlap, and redisplay processing when a hidden part of a window appears due to a change in the vertical relationship. , all of this was done using software, taking advantage of the ability to control each dot.

Problems to be Solved by the Invention However, in the above-mentioned conventional bit map type display device, clipping processing, redisplay processing, etc. are performed by software, which causes problems such as processing time and complexity of the software. Ta. The present invention solves these conventional problems, and aims to provide an excellent display control device that eliminates the need for clipping processing, redisplay processing, etc.

Means for Solving the Problems In order to solve the above objects, the present invention provides a display device with a memory relocation device and a window control ill device between a central processing unit, a display controller that reads data to be displayed, and a frame memory. It also adds a display function with priority to the display controller.

Effects The present invention has the following effects due to the above structure. That is, the central processing unit uses a memory relocation unit to divide the frame memory into regions for each window. Specify the vertical relationship and size 1 position of the window using the window and ilJ control device. The display controller reads the frame memory through the memory relocation device according to the window control device;
Convert it to a display signal and display it on the display.

Therefore, the software can easily change the vertical position of the window by changing each parameter for the window control device and the memory relocation device, and no complicated processing is required, making the software simple and fast. processing becomes possible.

Example FIG. 1 shows the configuration of an embodiment of the present invention.

As shown in FIG. 1, the components include a central processing unit 11, a memory relocation device 12, a window control device 13, and so on. It is connected to the display controller 15. 14 is a frame memory, which is connected to the memory relocation device 12. 16 is a display, which is connected to the display controller 15.

Next, the mutually related operations of the constituent elements of the above embodiment will be explained. In the above embodiment, when creating a new window, the central processing unit 11 specifies the size, display position, and hierarchy position of the window to be created to the window control device 13, and sends the window to the frame memory through the memory relocation device 12. 14, and set the starting address of that memory to the window, tlJ control device 1.
Specify 3. For drawing within a normal window, data is written to the memory via the memory relocation device 12.

The memory relocation device 12 generates a window.

This is to avoid the situation where repeated erasing causes the memory to become fragmented, and there is no contiguously obtainable area, even though there is overall usable capacity. That is, the memory relocation device 12
The address specified by the central processing bag ff1ll and the display controller 15 (hereinafter referred to as a logical address) is converted to the address of the actual frame memory ]4 (hereinafter referred to as a physical address) using an internal conversion table. do. The above problem can be solved by providing a conversion table for each window. As mentioned earlier,
Acquiring memory in the frame memory 14 is nothing more than securing a table in the memory relocation device 12 and creating a conversion table.

The display controller 15 refers to the window control device 13 and stores only the portion of the window visible on one surface in the frame memory 14 via the memory relocation device 12.
The physical address is read out, converted from a physical address to a logical address, and a signal to be displayed on the display 16 is generated.

As described above, according to the above embodiment, the central processing unit 11 is connected to the memory relocation device 12. When the window control device I3 is operated, the operation is immediately reflected on the display screen, which greatly simplifies the process and eliminates the need to clip the display between overlapping windows. Further, in the above embodiment, since all the display contents of each window are always stored in the memory, there is an advantage that even if re-display occurs, it is immediately displayed.

Note that in the above example, it was defined that the size of the window acquired in memory and the size displayed are the same.
The size acquired in memory may be larger than the size displayed. In this case, a large virtual plane is displayed on the display through a viewing window called a window.

Effects of the Invention As is clear from the above embodiments, the present invention provides a memo+ memory area for rearranging frame memory for each window.
1 relocation device, and a window control device that specifies the vertical relationship, size, and position of the window displayed on the display, and a display control device: Added a function to support multi-window display. It has the advantage of being able to speed up the process. Furthermore, since the window display is fast, it is possible to react quickly to user operations such as changing the window position, and the user interface is improved.

[Brief explanation of the drawing]

FIG. 1 is a simplified block diagram of a display control device according to an embodiment of the present invention, FIG. 2 is a pattern diagram showing an example of multi-window display, and FIG. 3 is a simplified block diagram of a bit map display device. It is. 11...Central processing unit, 12...Memory relocation device, 13...Window control device,
14... Frame memory, 15...
Display controller, 16...Display. Figure Figure Tesbu I

Claims (1)

[Scope of Claims] A frame memory that stores image information; and a memory relocation device that divides a memory area for each window and relocates the image information stored in the frame memory to the frame memory. , a display that displays image information in the frame memory; a display controller that reads and displays image information to be displayed on the display from the frame memory; and a vertical relationship and size of the window that is displayed on the display. , and a window control device that specifies display conditions such as positions, and when displaying the plurality of windows on the display, the display controller causes the memory relocation device to specify display conditions such as positions. A display control device that reads image information from the frame memory whose memory has been rearranged according to the above, and displays a desired window on the display.