JPH04190290A - Display device for information equipment - Google Patents

Abstract

PURPOSE:To speedily and simply evacuate and return a control register by providing a display device with a stack pointer and a sequencer for a drawn image control register, and providing each brain of a video-memory with a data course for the evacuation and return of a separate drawn image control register. CONSTITUTION:First, a stack pointer 3 is provided with a vacant domain for a video-memory. In evacuating color information registers 2a-2d, an evacuating command 20 is issued to a sequencer 4 to issue an access control signal 5 for video-memories, and the contents of the color information register are written into an address indicated by a pointer 3, which is further renewed into a next address. In returning the color information registers 2a-2d, a returning command 20 is issued to the sequencer 4 to put back the pointer 3 to a previous value, and the contents of the color information register are read out from the address indicated by the pointer 3, and written into the registers 2a-2d. Thus the plural registers can be simultaneously evacuated and returned for the improvement of processing speed.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a method for configuring a display device for information equipment.

[Conventional technology]

In conventional display devices, as a method of saving drawing control registers, the CPU reads them out one by one (Ilo) and stores them in main memory, etc.

[Problem to be solved by the invention]

The above conventional technology does not take into consideration the saving and restoring of drawing control registers in a display device where a large number of drawing control registers exist, and there is a problem that the processing time increases when multiple types of GSO are drawn simultaneously by time division. there were.

An object of the present invention is to provide a means for quickly and easily saving and restoring drawing control registers, and furthermore, to provide a means for quickly initializing drawing control registers for each pole drawing. It is in.

[Rounding method to solve the problem]

To achieve the above object, the present invention provides a stack pointer and a sequencer for drawing control registers in a display device, and further provides a data path for saving and restoring separate drawing control registers in each plane of the video memory. As another means for achieving the above object, a repeating set of drawing control registers is provided, and a selection register for selecting a set of drawing control registers is also provided.

[Effect]

The sequencer controls the order of drawing control registers to be saved or restored and the timing of video memory accesses, and the stack pointer manages video memory accesses to be saved or restored. Furthermore, sequencer Fi! ! , or update the return process end edge stack pointer.

Select the register file to be connected to the video memory using the drawing data bus switch. The drawing data bus switch is managed by a selection register.

〔Example〕

An embodiment of the present invention will be described below with reference to FIG. 1st
The figure shows video memories 1a to 1 which are storage means for image information.
d and the color t [register 2a
2d, the stack pointer 5, and the sequencer 4.

On the other hand, when drawing graphics while displaying a clock at -S on the screen, or when moving the graphics cursor while a certain drawing is being performed, two types of The above drawing must be done. At this time, it is necessary to save all information related to drawing, perform another drawing, and then restore the information.

Conventionally, cpυ reads each register one by one and saves it to main memory, etc., but this method requires time to save and restore.

Therefore, the color information registers 2a to 2d correspond to each blur/1a to 1d of the video memory, respectively.
Generally, it is noted that the space of the video memory is as large as the actual display area, and the color information registers 21 to 24 are saved to empty areas of the video memories 1a to 1110.

When it becomes necessary to save the 0 color information registers 2a to 2d, which set an empty area in the video memory to the stack pointer 5, the sequencer 4 can be saved by issuing a save instruction 20 to the sequencer 4. Video memory 1a to 1d
The access control signal 5 is issued, the contents of the color information register are written to the address indicated by the stack pointer 5, and the stack pointer 5 is updated to the next address.

When restoring the color information registers 21 to 2d, the sequencer 4 returns the value Il of the stack pointer 5tlljIi1 when issuing the return instruction 20.
Return c, read the contents from the address indicated by stack pointer 5, and write color information register 2&~2dk.

This allows multiple registers to be used at the same time (four in Figure 1).
can be saved and restored, which is effective in improving processing speed. Furthermore, since the save area can be managed using only the stack pointer 5, operability is improved.

Further, as shown in FIG. 2, regarding the drawing control registers 6 to 9 other than the color information registers 2a to 2d, the video memories 1a to
1d and data paths 10a to 10 (1
By providing a video memo 171a to 171d, it becomes possible to save and restore the video memo 171a to 171d. In this case, the sequencer 4Fi accesses the video memories 1a to -1d multiple times while updating the stack pointer 3.

Furthermore, as shown in FIG. 3, the drawing control register It, 12 with a short pit length is coupled only for saving and returning.
- By considering it as a book register, it becomes possible to save and restore the drawing control register efficiently.

Furthermore, the initial values of each drawing type are saved in the video memory, and the stack pointer 3 is saved when switching between drawing types.
By manipulating , and restoring the corresponding saved information, it becomes possible to initialize the drawing control register by #1 stroke type.

Another embodiment of the present invention will be described with reference to FIG.

A drawing control register group including the color information registers 21 to 2d is set as one register file 16, and a plurality of register files 16 are provided,
The drawing ms is assigned to each register file, and the selection register 14 determines which O register file to use.

This makes it possible to save and restore the drawing control register at high speed, which is effective in improving processing speed and operability.

〔Effect of the invention〕

According to the present invention, the drawing control register in the display device can be saved and restored at high speed by issuing a command, which is effective in speeding up processing and improving operability.

Further, it is effective in improving rounding operability, since initial values required for various drawings can be restored as necessary.

Furthermore, by forming the drawing control register into a plurality of register files, the drawing control register can be switched at high speed, and processing speed can be increased.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of saving color information registers to video memory using a stack pointer and sequence tI/c according to an embodiment of the present invention, and FIG. 2 shows saving general drawing control registers to video memory. Day! FIG. 3 is an explanatory diagram of the path, and FIG. 3 is an explanatory diagram of how multiple registers with short bit lengths are combined and saved. FIG. 4 is a register file and video memory of the drawing control register, which is another embodiment of the present invention. It is an explanatory diagram of connection with. 1&~1d...video memory, 2a~2 modification...color information register, 3...stack pointer, 4...sequencer, 5...access control signal, 6~9°°° drawing control register , 10a-101...data path, 11°1
2... Drawing control register with short pit length, 13...
Drawing data bus switch, 14... selection register, 15
~18... Drawing control register file, 19... Video memory section, 20... Saving and restoring instructions.

Claims (1)

[Claims] 1. In a display device of an information device having a drawing control register such as a color information register, the contents of the drawing control register are saved to an empty area of a video memory and restored from the video memory to the drawing control register. A display device for information equipment, characterized in that it is provided with a stack pointer and a sequencer. 2. The display device for information equipment according to claim 1, wherein each plane of the video memory is provided with a data path for saving and restoring a separate drawing control register. 3. The display device for information equipment according to claim 1 or 2, wherein a plurality of said drawing control registers having short bit lengths are combined and saved in said video memory. 4. The drawing control register according to claim 1, 2 or 3, which corresponds to switching the drawing type. A display device of an information device that reads information from a save area and initializes the drawing control register. 5. A display device for information equipment, characterized in that a plurality of sets of drawing control registers are provided, and a selection register is further provided for selecting a set of drawing control registers to be used.