JPS6073576A - Color graphic display - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] [Technical field of invention] The present invention relates to color graphic displays.

[Technical background of the invention and its problems]

Recently, an increasing number of CRT displays' installed in office computers and the like display graphics in addition to single characters, and demands for color display are also increasing.

An example of a schematic configuration of a color graphic display used in this type of system is shown in Fig. m1.

In the figure, numerals 1, 2, and 3 are memory circuits that hold display data corresponding to the basic colors of red, green, and blue, respectively, and are memory brains constituted by RAM. Image data to be displayed is sent from a processor (not shown) to this memory brain.

The display data for each color written in 2.3 and obtained from the memory brains 1 and 2.3 is sent to the drivers 4 and 2.3 respectively.
5.6 to a CRT monitor (not shown) and one color is added to obtain the desired display.

Now, let us assume that the display color of the data to be written on the CRT monitor is yellow. At this time, the write pulse is sent only to the red and green brain memories 1.2, and the display data sent from the processor is written only to the memories on these two sides, and is sent to the helmet brain memory 3. By reading out the contents of the three plane memories 1, 2, and 3 and performing various modifications such as superimposing them, display data with desired coloring can be obtained on the CRT monitor. can.

By the way, according to the conventional example, coloring is done using the above method, so even if there is a specification such as color switching for the same display data, it is necessary to rewrite the display data for each plane memory, which is a disadvantage for the processor. Of course, there were problems with speed.

[Purpose of the invention]

The present invention has been made in view of the above drawbacks, and an object of the present invention is to provide a color graphic display that not only reduces the load on the processor by adding a small amount of hardware, but also improves processing speed. With the goal.

[Summary of the invention]

In order to achieve the above object, the present invention includes a register in which information for color selection is set, and a selector that selects and outputs the corresponding memory contents based on the setting information in the register, and the number of memories provided for each bookbinding color. It was prepared only.

By setting information for color selection in each of the above-mentioned registers, the coloring of day and evening can be arbitrarily switched and displayed on one display screen.

As a result, the recoloring is executed by the hardware, and the rewriting operation for recoloring can be omitted, which reduces the load on the processor and enables tracing processing.

[Embodiments of the invention]

Embodiments of the present invention will be described in detail below using the drawings.

FIG. 2 is a block diagram showing an embodiment of the present invention. In the figure, reference numeral 11 denotes a memory for storing display data, and for convenience of explanation, M1 is used for storing display data.

Three divisions are made: M2, M,. 21°22.2
3 is a register. Registers 21゜22.23 are provided corresponding to the memory sections M1'tM, .DELTA.43,
Information for color selection (pattern l-n; see (table)) is set for each by a processor (not shown).

31, 32, and 33 are multiplexers. The multi-break f31, 32, and 33 each have the above memory ll.
The output is supplied and based on the corresponding register value,
The contents of any one memory section are selectively output.

Incidentally, 41, 42, and 43 are drivers.

In cooperation with the synchronization signal arriving via the video control section 44, red, green, and blue video signals are generated, respectively. Since this part has been well known in the past and is not directly related to the gist of the present invention, it will be collectively referred to as the video signal generation circuit (2).

No further details will be given.

The operation of the embodiment of the present invention will be described in detail below.

First, one display data is written into the memory 11 by the processor unit. Typically, the processor unit is
The registers 21 and 21 are arranged so that each color data is written in the memory section M1 for red, the memory section M2 for green, and the memory section M3 for evening.
Set that information in 22.23. By this.

Multiplexers 31, 32, and 33 select each color data and send a video signal to a CR'I' monitor (not shown) via a video signal generation circuit 40.

Here, an explanation will be given of the operation when the processor specifies color change of the same data, for example, data displayed in red can be saved to green at once. In this case, this can be easily achieved by changing the set values of the registers 21, 22, and 23.

Specific examples are shown in the table below.

As shown in the above table, when data indicating a pattern is set in the registers 21, 22 and 23, the M output from the multiplexer 31, the M2 output from the multiplexer 32, and the i3 output from the multiplexer 33 are selected. video signals R, (), and B corresponding to the respective basic colors are generated. Next, when data is set to the registers 21, 22, and 23 without indicating the pattern ■, the multiplexer 3
1 to M output, multiplexer 32 to M 3 output,
The M1 output is selected from the multiplexer 33, and the color of the data that has been displayed so far is instantly repainted.

Also, depending on how the logic of registers 21, 22, and 23 is configured, M, , M2, and M may be overlapped.

It is also possible to specify the same color. This pattern is shown after pattern (■) in the table above.

If a memory for display modification is further added, display screen modifications such as blinking and reversing can also be realized in the same manner as described above.

〔Effect of the invention〕

As described above, according to the present invention, repainting of one color is realized by hardware, so the burden on the processor is reduced. Furthermore, because the color is repainted, it is possible to omit the operation of rewriting the memory, which allows for faster processing.

[Brief explanation of the drawing]

FIG. m1 is a block diagram showing a conventional example, and FIG. 2 is a block diagram showing an example of the configuration of a color graphic display according to an embodiment of the present invention. 11...Memory, 21, 22, 23...Register. 31.32.33... Multiplexer, 40... Video signal generation circuit. Applicant's agent Patent attorney Takeshi Suzue Model box 1 unit Diagram 2

Claims (1)

[Claims] Each memory is provided with each memory in which display screen data corresponding to the basic colors is stored. A register is provided for each memory to which information for color selection is set from the outside, and each output obtained from the memory is obtained based on the information specified by the corresponding register. a selector that selectively outputs one of the memory contents;
It has a video signal generation circuit that obtains the output of each selector and generates a video signal through each driver together with a synchronization signal for display arriving from the outside, and sets arbitrary information for color selection in the above register. Possibly 1 display l
I! A color graphic display characterized by switching and displaying the coloring of data on 11 pages.