JPS5937590A - Color information input/output transfer system - 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 the Invention] The present invention provides a color display and output for printing! [Technical background of the invention and its problems] Generally, color information input/output transfer method suitable for color signal transfer between a CRT and a host device is used. In a color printing device such as a printer, display or printing of an arbitrary color is performed by combining three primary colors (basic colors). Power 2-1!
(as shown in the table), it is possible to express multiple colors using the combination of the three primary colors as shown in the table below. Therefore, for color display, bit massaging in which screen information (image data) is stored is necessary. It is necessary to prepare memory for each of the three primary colors. Conventionally, in order to display multicolor images using these bitmap memories, a method was adopted in which the image data for each of the three primary colors was transferred separately and stored in the corresponding bitmap memory. However, the method of transferring image data of each of the three primary colors to a color display device for color display has the drawback that the amount of data to be transferred becomes enormous and the system efficiency decreases.

[Purpose of the invention]

The present invention has been made in view of the above-mentioned 4% VC.The purpose of the present invention is to provide a color display or a color printing output device having a plurality of bitmap memories provided for each basic color. Device input/output port 4: In a system connected to the host device via the input/output port 4, when transferring multicolor image data, the common image data is transferred without transferring the image data of each basic color separately. An object of the present invention is to provide a color information input/output transfer method that improves system efficiency by transferring data only once. [Summary of the Invention] The present invention relates to transferring multicolor image data, Focusing on the fact that the image data of each basic color is common,
By simply transferring the common image data once, it is possible to obtain substantially the same result as in the past, by transferring the image data of the basic colors and J''L separately. Therefore, in the present invention, when an input/output request is made, the higher-level device transfers all combination information of the basic colors that make up the desired color to the output device.Furthermore, in the case of an output request, the higher-level device transmits the above-mentioned common information. image data is transferred to the output device.On the other hand, in response to an output request from the host device, the output device specifies all the pit matsub memories corresponding to the basic colors indicated in the combination information above. The common image data mentioned above is stored in the area.In addition, in response to an input request from the higher-level device, the output device selects the specified bitmap memory from all the bitmap memories corresponding to the basic colors indicated in the combination information above. If there is only one type of basic color indicated by the above combination information, the data read from the corresponding bitmap memory is transferred as image data to the host device as it is, and the data stored in the above combination information is read out in order. When two or more basic colors are shown, the common data portion of each read data from each corresponding bitmap memory is transferred to the host device as image data.0 [Embodiment of the Invention] Below , one embodiment of the present invention will be described with reference to the drawings.8
Figure 1 shows a schematic configuration of a system to which the present invention is applied, in which 10 is a CP tJ (upper device a), 20 is a color display device, for example, a color graphic CR7 display device (hereinafter simply referred to as a CRT display device). be. The CRT display device 20 connects the C
Connected to PU1o. Figure 2(a), Figure 2(b)
) are combined in such a way that FIG. 2(a) is placed to the left of FIG. 2(b), and the CRT display device 20 in the system of FIG.
This shows the configuration of In the figure, 201 is a microprocessor path, which includes a control signal line, an address signal line, and a data signal line area. 202
is a program IO such as PIO of Z80 made by US company Zilog.
(hereinafter referred to as PIO) 0PI0202 is connected to the keyboard 20 via the keyboard 3 can logic 203.
4, 0205 is a microprocessor such as 280 (hereinafter referred to as μP), and 206 is μP2O.
ROM stores programs for 5, 20'l is RA used as work memory for programs and data.
It is M.

208 is a normal DMA device (hereinafter referred to as DMA) for a microprocessor.

DMAjO& transfers data between the RAM 201 and the code refresh memory 211 or code attribution memory 212 (described later), and transfers data to the pit map RAM 22 through the RAM; toy and the GDCJJ 4 (described later).
It is used to transfer data between 1 and 223. 209 is 8IO such as z80' SIO. CR
The T display device 20 is connected to °CCl2OCP via 810209.
Connected to the input/output port of Ul0. 210 is a CRT controller (hereinafter referred to as CRTC) such as 6809 manufactured by Motorola, Inc., which will be described later.
Reference numeral 0211, which performs the timing-based aI stop of No. 25, is a code refresh memory in which character (alphanumeric, kana, kanji, etc.) codes for one screen to be displayed on the CRT monitor are stored at address positions corresponding to display positions. 212 is a code attribution memory in which modification information (for example, color information, blinking, underlining, reverse display, etc.) for the corresponding character code is stored.0 213 is for generating a character font (character pattern) corresponding to the character code. ROM (hereinafter referred to as CG),
; tr4 is a mosaic RAM into which mosaic pattern fonts are read/written. 215,216 are ttP20
5 directly sets the nitator (hereinafter,
REG), zxr, ;txs are multiplexes (hereinafter referred to as MPX). MPX21 F is the output of code refresh mono 211 or REG; 1
MPX21g is designed to selectively output either one of the outputs of 15 to CGjl13, the output of code refresh method 21, or the output of REG216 to the mosaic RAM214.
9 ends at CRT control logic turn 8. CRT control logic circuit 2
19 is C (CRT table matches the output of J213 with the timing and performs the modification process designated by the output of the code attribution memory 212. 022° is the next information to be controlled by the CR'l' control logic circuit 219f. is the REG (register) to be set.

221--223 are bitmap RAM (bit-l block memory) as a block image memory.Bitmap RA) 71 to 1221-223.
Image data of the three corresponding primary colors of red, blue, and green are stored in a one-to-one correspondence corresponding to the screen position. 224
is a graphic display control circuit (hereinafter referred to as GDC).

GD (':224 is bitmap RAMZjJ~223
225 is a color CRT.
monitor (hereinafter simply referred to as a CRT monitor).

A video signal from the CRT control circuit 219 and a video signal from the bitmap RAM 22 J-223 are supplied to the CRT monitor 225, and the modified character information and image information are displayed in a superimposed manner.

Next, the operation of the embodiment of the present invention will be explained. First, C.P.
A case will be described in which U70 issues an output request to transfer image data to CRT display device 20. In this case, CPU10 outputs information in the format shown in diagram M3 from the input/output port of CPTJJO. This information is passed through microprocessor path 2 through 5I0209'4.
Sent out on Saturday 01, DMA208's control l: RA?
It is sequentially stored in a predetermined f area of 1120F. As shown in FIG. 3, the above information consists of - the ladder part, the header part, +1, and f (image data).

The header section is a color specification section (COLORINDICATO).
R) CI, command section (COMMANI)) CM,
Parameter part (PAR/'-METER) PARAZ=
-PARj\n. Color specification section cIl
# = Bit (bit 3) for specifying whether the image data to be transferred is data to be displayed in color or data to be displayed in black and white; It contains bits for specifying (base color of the colors constituting the color) (bit 2 for specifying red, bit 1 for specifying color 11, and bit 0 for specifying green). In this embodiment, bit 3 specifies black and white display when it is set to 1'', and output 2-display is specified when it is set to '0#.

Code 77 code part c s+ is DI'? AW IMAGE
TOCRT instruction pit (hereinafter referred to as DRAW instruction bit) and READ IMAGE FROM
CRT instruction bit (hereinafter referred to as READ instruction bit) and 5END IMAGE FROM C
RT (hereinafter referred to as SEND instruction bit). DRAW instruction bit is set by CPU10 to CRT
This is an output request bit that instructs to transfer image data to the display device 2o, and is valid at 1''.

On the other hand, the READ command bit is stored in the bit map RAMR! in the CRT display device 2°. This is a bit that instructs to take out the image data from 1 to 223, and the 5END command bit is a bit that instructs to transfer the above-mentioned taken out image data to the CPUJ (11.
The command bit 5END is 0 in the case of a ↓ (DRAW-“1”) output request in this embodiment, which is 0. In contrast, it requests image data transfer from the CRT display device 20. For input request, RE A Df?l
The 5END instruction bit for the command pit is '1' (at this time, DRAW="0").

On the other hand, the parameters @15PARA7~PARAn are the length of the corresponding image data), the same <CR
This is a field for parameter information that specifies the area of the display screen of the T monitor 225, etc.

Also, image data is output request (DRAW="1")
It is added after the header only in the case of compressed data (for example, M H, M R in facsimile transmission).
), there is data in the image format of uncompressed data.

When all the information transferred from the CPU 10 and having the format shown in FIG. 7'C is stored in the RAM 20F as described above, an interrupt is applied to the area aP 205 of the DMA 20B. Accordingly, the μP2O5 reads the contents of the header section from a predetermined area of the RAM 20F according to the program in the ROM 206, and sets the command section CM to 1 to determine whether it is an output request or an input request.
μP2O5 determines the bitmap RAM in which the image data should be stored by modifying the color specifying section CI. If bit 3 of the color designation section CI is "1#," it is a black and white display designation.
The data is transferred from the GDC 224f to the GDC 224 and stored in a common specified area of the bitmap RAMs 221 to 223 under the control of the GDC 224. This area and the length of the image data are specified by the parameter sections PARA7 to PARAn, 0' to fc, the color display specification where bit 3 of the force 2-specified section CI is 0#, and any of the bits θ to bit 2. If the bit, for example bit 2, is "l" (red display designation), the GDC 224 in response to the instruction from μP2O5 writes u oh to the common designated area of the bitmap RAMs 222 and 223.
Write p (you can also write '0' to the common specified area of bitmap RAMJ2J to 223).Next, write GDC2
24 is RAM in the specified area of bitmap RAMGE 1.
The image data stored in 201 is stored. −
*If bit 3 of fC% color specification section CI is 0'', specifying color display, and multiple bits among bits 0 to 2, for example, bit 1 and bit 2, are "1" (specifying purple display), μP2O5 In response to this instruction, GDCff24 writes ``0'' to the specified area of bitmap RAM 2230.

Next, the GDC 22J commonly stores the image data stored in the RAM 207 in the designated areas of the bitmaps 221 and 222.

Next, a case will be described in which the CPU 1o issues an input request for transferring image data from the display device 2o when CI<i'. In this case, only the header part of coffin 3 is CPU
xo to the CRT display device 20. The information in this header is R), M2o, as in the case of the output request described above.
7 is stored.

And when the storage is completed, from 20B to Eri D1.4 μP2O5
is interrupted. Therefore, μP2O5 is 110M
According to the program in the RAM 20r (D), the content of the header section is successively read from the predetermined area D, and the command section CM determines that it is an input request.Next, the .mu.P2O5 checks bits 0 to 2 of the color specifying section CI. Any one bit from bit θ to bit 2,
For example, if only bit 2 is "1", μP2O5 instructs GDC2;l4 to read data from the corresponding bitmap RAM 221. To this Eri GDCIJ
A sequentially outputs data from a designated area of the bitmap RAM 221. This read data is specified for the next color.

RAM2 is used to control DMA208 as image data.
Temporarily stored in 0F. The image data of the specified color temporarily stored in the RAM 207 is 5IO21)9
Transferred to CPU10K via.

On the other hand, if multiple bits out of bits 0 to 2 of the color specification section CI, for example bits 1 and 2, are l#
In the case of μP2O5, the corresponding bitmap RAM22
Read data from bitmap RAr
Data 'fr is sequentially read from designated areas A221 and 222. μP2O5 is bitmap RAM! The matching/mismatching of each data bit sequentially output from 21 and 222 is checked, and matching data bits are adopted as image data, and mismatching data bits are processed as image data as data bits of PA0#. generate, R
Store it in AM20r.

Then, when the image data for the specified length of the screen area specified by the parameter sections PARAJ to PARAn is completed, the image data is transferred to CPU10 in accordance with the 5END instruction bit.

In addition, in the above embodiment, the present invention was applied to a color graphic CR.
Although the description has been made regarding the case where the present invention is applied to a display device, it is obvious that the present invention can be similarly applied to a color printer or the like.

〔Effect of the invention〕

As described in detail above, according to the color information input/output transfer method of the present invention, when transferring multicolor image data, it is difficult to transfer the image data of each basic color separately, and the common image All you have to do is transfer the data once. Additionally, the amount of data to be transferred is significantly reduced, which improves system efficiency.

[Brief explanation of drawings]

Fig. 1 is a schematic diagram showing an embodiment of a system to which the present invention is applied, Fig. 2(a) and Fig. 2(b) are Fig. 2(b).
) Figure 2 (a) is a block diagram showing the four components of the CRT display device in the above embodiment; Figure 3 is applied to the above embodiment. FIG. 3 is a diagram showing a seven-way image data transfer system. 10... CI'-U (upper device), 2o... Color graphic CRT display device (CRT display device), 20
5...Microprocessor (μP), 207...RA
M, 221-223... Pit map RAM (pit map memory), 224... Graphic display control circuit (GDC). Applicant's agent Patent attorney Takehiko Suzue 1st Figure 3rd cause

Claims (1)

[Claims] A bitmap memory in which image data is stored in an address area corresponding to a color display or color printing position, and an output for color display or color printing that has a plurality of bitmap memories provided for each basic color. In a system in which a device is connected to the host device FC via an input/output port of the host device, when an output request is made to transfer image data to the output device, information on combinations of basic colors constituting a desired color, and A means for transmitting image data for display or printing to the output device; and a means for transmitting combination information of basic colors constituting the desired color upon an input request requesting the transmission of image data of a desired force from the output device. means for transmitting to the output device is provided in the higher-level device, and in response to an output request from the higher-level device, image data transferred from the higher-level device is transferred to all the image data corresponding to the basic colors indicated in the combination information. means for storing specified fc area storage data from all bitmap memories corresponding to the basic colors indicated in the combination information in response to an input request from the host device; The basic color read on the face and shown in the above combination information is 1u
In this case, the data read from the corresponding bitmap memory is transferred as is to the host device as image data, and if there are two or more basic colors indicated in the above combination information, data is read from the corresponding bitmap memory. A color information input/output transfer method, characterized in that the output device is provided with means for transferring a common data portion of each read data to a host device as image data.