JPS61208537A - Transfer device for display memory data - Google Patents

Abstract

PURPOSE:To perform the transfer of data at a high speed by setting a designated address of an optional plane of a display memory at the head and transferring or adversely transferring the rectangular area data of a designated size to a memory area where the designated address is set at the head position. CONSTITUTION:When data are transferred between a display memory 12 and a memory 13, the head address of an area to be transferred, the address of a transfer destination and the number of planes of the memory 12 are stored in a sender register 15, a receiver register 16 and a plane register 19 respectively. Then the horizontal width and the vertical width of a rectangular area in the memory 12 are stored in the horizontal and vertical width registers 17 and 18 respectively. When a mode register 14 shows the transfer of data to the memory 13 from the memory 12, a header is formed by the values of registers 14-19 on the memory 13. Then a data transfer device 20 transfers the data on the rectangular areas of registers 17 and 18 to an address shown by the register 16 from an address of the register 15 by a command given from a controller 24.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is directed to high-speed saving of display data by transferring an arbitrary color data area in display memory to memory at high speed, or to transfer display data to display memory faster than memory. The present invention relates to a display memory data transfer device that performs high-speed restoration of display data by transferring it.

BACKGROUND ART FIG. 5 shows the configuration of a conventional computer device related to display functions, in which 1 is a CPU, 2 is a memory, and 3 is a display memory composed of a plurality of color planes that store all display data. . 4 is writing data to display memory 3;
A display memory control device that performs readout, bit shift, bit mask, and plane switching processing is 3'.-- 5 is a video interface that creates a video signal from the display memory 3. 6 is a device that configures the contents of the display memory 3 into an image. CRT control device, A is C
It is RT.

In the conventional computer device configured as described above, the entire operation of data transfer from the display memory 3 will be explained.

In transferring one data, the CPU 1 first calculates all the addresses where the data to be transferred exists, and then
The content of the address calculated from the display memory 3 using
data), divides the storage destination address, and then stores the address data.

This process is repeated as many times as there are color planes making up the display memory 3.

Problems to be Solved by the Invention However, in the configuration described in section 2, when transferring a large amount of data that constitutes the entire area, for example,
When displaying the window l19i on the display of the window 18 shown in FIG. 6, or when displaying the menu 11 on the display of the window 10 shown in FIG. When transferring all data from memory 2 to display memory 3 at high speed (saving data) from memory 3 to memory 2, or when transferring all data from memory 2 to display memory 3 in order to restore the display after the display of window I19 or menu 11 is finished, CPU 1 performs - Every time data is transferred from full display memory 3 to memory 2, or from memory 2 to display memory 3, the transfer source address and transfer destination address are calculated, so the transfer takes time, and menu display and window changes are required. The problem is that there is no immediate response, the processing program becomes complicated, and the program size increases.

In view of the above, an object of the present invention is to provide a display memory data transfer device that transfers a large amount of color data constituting the entire area from the display memory to the memory or from the memory to the display memory at high speed.

Means for Solving the Problems The present invention provides a data transfer device 5' for transferring data from a display memory to a memory or from a memory to a display memory, and a source register for storing all starting addresses of areas to be transferred. , a destination register that stores the entire starting address of the area to which data is transferred; a width register and a height register that store the height and width of the rectangular area in the display memory;
A mode register that stores the data transfer mode, a plane register that stores the number of color planes that make up the entire display memory, the data transfer device, the source register, the destination register, the width register, the height register, the mode register, and the plane. This is a display memory data transfer device that includes a control device that controls registers.

For production The present invention provides a mode register with the above configuration.

Source register, destination register, width register.

When a data transfer command is sent to the control device with the transfer limit values set in the height register and plane register, the control device uses the contents of the plane register to control the planes that make up the display memory and transfers the data. A transfer command is sent to the transfer device to transfer data from display memory to memory or from memory to display memory at high speed.

Embodiment FIG. 1 shows the configuration of a display memory data transfer device in an embodiment of the present invention. In Figure 1, 1
2 is a display memory composed of a plurality of planes, 13 is a memory, 14 is a mode register indicating the mode of transfer from the display memory 12 to the memory 13 or from the memory 13 to the display memory 12, and 16 is the start address of the area to be transferred. 16 is a destination register that stores the transfer destination address. 17 is a width register that stores the entire width of the rectangular area in the display memory 12. 18 is the vertical width of the rectangular area in the display memory 12. Length register that stores all, 19
20 is a plane register that stores the number of planes constituting the display memory 12, and 20 is a source register 16. Destination register 16. Horizontal middle register 17. Height width register 18. A data transfer device that transfers data using the brain register 19, 21 a video interface that creates a video signal from the display memory 12, 22 a CRT, 23 Table 7-- Writing and reading data to the display memory 12, plane switching 24 is a mode register 14 . Send 1c register 16゜Destination register 1
6. Width register 17. Height width register 18. Plain register 19. This is a control device that controls the data transfer device 20.

The operation of the display memory data transfer device of this embodiment configured as described above will be described below.

First, it is assumed that the space of the display memory 12 is expressed as a two-dimensional space as shown in FIG. 2 by repeating iN rows of consecutive memory areas each having M data numbers horizontally, and the area to be transferred is as shown by 25. Let this be an m x n area within this area.

First, the transfer of data from the display memory 12 to the memory 13 will be explained using the flowchart shown in FIG.

In this embodiment, before starting data transfer work, a source register 15 indicating the start address to be transferred, a destination register 16 indicating the destination, a width register 17 indicating the width and height of the transfer area, and a height register 18. It is assumed that all mode registers 14 indicating transfer modes are set.

At 26 in FIG. 3, the data transfer command is sent to the controller 24.
If the contents of mode register 14 are transfer from display memory 12 to memo January 3, controller 24 transfers the contents of source register 16. Destination register 16. Width register 17. A header consisting of the values of the height register 18 and the plane register 19 is created on the memory 13.

Next, at 27, the controller 24 controls the plane register 1
The contents of 9 are compared with 0, and if it is 0, this transfer process is completely terminated.

At 28, the control device 24 sets all the transfer modes stored in the mode register 14 in the data transfer device 2o, and instructs the plane number where the data to be transferred is located.

At 29, the control device 24 issues a data transfer command to the data transfer device 2o.

The data transfer device 20 moves from the start address of the transfer area stored in the source register 16 to the memory 13 indicated by the destination register 16 in accordance with the command 9'\゛-. from the control device 24.
The data of the rectangular area indicated by the width register 17 and the height register 18 is transferred to the address.

After the data is transferred, the size of the transferred data is added to the contents of the destination register 16 and stored.

At step 3o, the control device 24 subtracts 1 from the contents of the plane register 19 and stores this value. Then, the process moves to 27.0 The process is performed as described above, and all the rectangular area data in the display memory 12 is transferred to the memory 13 when the content of the plane register 19 becomes 0.

Next, the transfer of data from the memory 13 to the display memory 12 will be explained using the flowchart shown in FIG.

In this case, before starting data transfer work,
Source register 1 indicates the start address to be transferred using the contents of the header at the beginning of the data to be transferred in
6. Destination page register 16 indicating the destination; Width register 17 indicating the width and height of the transfer area. It is assumed that the height register 18 and the mode register 14 indicating the transfer mode are all set.

At 31 in FIG. 4, the data transfer command is sent to the control device 24.
If the content of the mode register 14 is a data transfer from the memory 13 to the display memory 12, the control device 24 first compares the content of the mode register 14 with the content of the plane register 19 and sets it to 0.
Then, at 032 to end this transfer process, the control device 24 sets the transfer mode stored in the mode register 14 in the data transfer device 20, and instructs the plane number where the data to be transferred is located.

At 33, the control device 24 issues a data transfer command to the data transfer device 2o.

In accordance with a command from the control device 24, the data transfer device 20 moves from the start address of the transfer area of the memory 13 stored in the source register 16 to the address in the display memory 12 indicated by the destination register 16 by 11”-' width register 17 All data is transferred to the rectangular area indicated by the width register 18.

After the data is transferred, the size of the transferred data is added to the contents of the source register 16 to calculate and store the address from which the next data will be extracted.

At 34, the control device 24 subtracts 1 from the contents of the plane register 19 and stores this value. The process then moves to step 31.

The process is performed as described above, and all the saved data in the memory 13 is transferred to the rectangular area of the display memory 12 when the content of the plane register 19 becomes 0.

As described above, according to this embodiment, there is a mode register indicating the mode of transfer from the display memory to the memory or from the memory to the display memory, a source register storing the start address of the rectangular area to be transferred in the display memory, A destination register that stores the address of the transfer destination, a width storage register that stores the width of the rectangular area to be transferred in the display memory, a height register that stores the vertical width of the rectangular area to be transferred in the display memory, and a display. A data transfer device that transfers data using a plane register that stores all the number of planes that make up the memory, a source register, a destination register, a width register, a height register, and a plane register, a mode register,
A large amount of data can be transferred from display memory to memory or from memory to display memory at high speed by providing a control device that controls the sending register, destination register, width register, height width register, plane register, and data transfer device. This allows you to quickly display menus and change windows.

As described in detail, according to the present invention, a large amount of display data (
Color data) can be transferred at high speed, so processing such as displaying menus and changing windows can be performed quickly, and data can be transferred simply by issuing a command, which simplifies processing programs. The size can also be reduced, which has great practical effects.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a display memory transfer device according to an embodiment of the present invention, FIG. 2 is a block diagram of a display memory according to the same embodiment, and FIG. 3 is a diagram showing data transfer from display memory to memory according to the same embodiment. 4 is a flowchart showing the operation of transferring data from the memory to the display memory in the same embodiment. FIG. 6 is a configuration diagram of a conventional computer device.
The figure shows an example of window change and menu display. 0 1...CPU, 2...Memory, 3...
...Display memory, 4...Display memory control device, 6...Video interface, 6...
・CRTC17...CRT. 12...Display memory, 13...Memory, 14...Mode register, 15...
Sending F) Source v) Sp, 1e... Destination register,
17...Width register, 18...Height width register, 19...Plane register, 2o
...Data transfer device, 21...Video interface, 22...CRT, 23...
. . . Display memory control device, 24 . . . Control device. Figure 4 Figure 5

Claims (1)

[Claims] Transfers rectangular area data of the specified size starting from the specified address of any plane of the display memory consisting of multiple color planes to the memory area starting from the specified address, or from the specified address a data transfer device that transfers memory area data starting from a specified address of any plane to a rectangular area of a specified size starting from a specified address; a source register that stores the starting address of the area to be transferred; A destination register that stores the start address of the area to which data is transferred, a width register and a width register that store the vertical and horizontal sizes of the rectangular area to be transferred in the display memory, and from the display memory to the memory. a mode register that stores the mode of data transfer such as data transfer or transfer from memory to display memory, a plane register that stores the number of color planes configuring the display memory, the data transfer device, a source register, and a destination register. , a display memory data transfer device comprising a control device for controlling a width register, a height register, a mode register, and a plane register.