JPH0352105B2 - - Google Patents

Description

[Detailed Description of the Invention] [Summary] This is a graphic display control method for a terminal system that displays graphics based on graphic display data transferred from a host computer. A plurality of graphic display data are received from the host and stored in the memory, and the graphic control table allows the graphic display data to be read out and processed by graphic number. The display figure selection register is set by keyboard input and specifies the display figure with the bit corresponding to the figure number, so the figures specified in the register are controlled to be displayed in sequence. As described above, it is possible to speed up the response to designation of a display figure, change of designation, etc.

[Industrial application field]

The present invention relates to a graphic display control method for a terminal system in an information processing system that displays graphics based on graphic display data transferred from a host computer.

[Problems to be solved by conventional technology and invention]

FIG. 2 is a block diagram showing an example of the configuration of a terminal system that processes graphical displays.

The terminal system consists of a keyboard 1, a main control section 2, a display control section 3, and a display device 4.
The communication control unit 10 connects to the host computer 5 via a communication line.

When displaying graphics related to a desired task, the operator inputs a predetermined request message to the host computer 5 from the keyboard 1.

The message is transferred to the host computer 5 by the communication control section 10, and as a result of identifying the request, the host computer 5 selects the desired graphic display data and sends it to the terminal system.

When receiving graphic display data, the communication control unit 10 stores the received data in a storage area designated by the host for each graphic display data on the memory 11 by identifying the attached transfer control information. .

Each figure display data is data consisting of a control procedure for displaying a figure, a procedure for determining data specifying the display position, size, etc. of the figure, and includes, for example, a circle, a polygon, or A combination of more complicated figures is provided depending on the type of figure required.

The data analysis unit 12 analyzes the graphic display data, and according to the procedure specified in the graphic display data,
If necessary, specification of specifications from the keyboard 1 is received via the communication control unit 10, and data specifying, for example, each element vector of the display figure is generated and displayed as display data along with color specification and other control information. Pass it to the control unit 3.

The display control section 3 generates bitmap dot data and the like from the display data passed from the data analysis section 12 and controls the data to be displayed on the screen of the display device 4.

When displaying each figure, request information from the keyboard 1 is sent to the host computer 5 via the communication control unit 10, and the host computer 5 processes the request information to create the required figure display data. The control data (storage area address on the memory 11, analysis start address, etc.) necessary for reading and analyzing the data from the memory 11 is transferred to the terminal system.

When the data analysis section 12 receives this control data via the communication control section 10, the data analysis section 12 can start analyzing one piece of graphic display data held in the memory 11.

According to the above control method, in graphic display,
Communication between the terminal system and the host computer is frequently required, resulting in the problem of slow graphics display processing speed.

[Means for solving problems]

FIG. 1 is a block diagram showing the configuration of the present invention.

The figure shows the configuration of a graphic display terminal system, in which 1 is a keyboard, 20 is a main control section, 3 is a display control section,
4 is a display device.

In the main control unit 20, 21 is a communication control unit;
2 is a graphic control table register, 23 is a display graphic selection register, and 24 is a data analysis section.

[Effect]

Graphic display data is transferred from the host computer 5 in the conventional manner and stored in the memory 11 of the terminal system.

At the same time, a graphic control table containing information for accessing the graphic display data is created in the host computer, transferred, and held in the graphic control table register 22.

The graphic control table is a table of access control information configured to index graphic numbers attached to each graphic display data as addresses.

When the operator inputs figure number information specifying a figure to be displayed or a figure to be deleted and an on/off designation from the keyboard 1, the communication control unit 21
In accordance with this designation, the corresponding bit of the display figure selection register 23 is reset, and control of the data analysis section 24 is activated.

The display figure selection register 23 consists of a 1-bit status bit each indexed by a figure number, and by turning on/off the status bit, it indicates whether the display of the corresponding figure is requested from the keyboard 1 or not. ing.

The data analysis unit 24 includes a display figure selection register 2
The state bits 3 are scanned in the order of the figure number, and when an on bit is detected, the figure control table register 22 is indexed by the corresponding figure number, and the figure display data 1 in the memory 11 is scanned according to the control data.
and analyzes the graphic display data in the same way as before.

When the processing of this figure display data is finished, scanning of the display figure selection register 23 is resumed from the next figure number.

With the above control configuration, graphic display in response to requests from the keyboard 1 can be speeded up, and processing by the host computer can also be reduced.

〔Example〕

In the configuration shown in FIG. 1, the communication control section 21 and data analysis section 24 of the main control section 20 are replaced by the conventional communication control section 10 and data analysis section 12, except as described below.
The other parts having the same functions as in FIG. 2 and having the same reference numerals as in FIG. 2 are the same as in the conventional case.

When graphic display data is transferred from the host computer 5 to the terminal system in the conventional manner, the communication control unit 21 stores the data in a storage area specified by the host on the memory 11, as in the conventional manner.

At the same time, a graphics control table containing information for accessing those graphics display data is created on the host computer and transferred.
The communication control unit 21 controls the graphic control table register 22
retain that information.

The figure control table is a table of access control information configured to index the figure number attached to each figure display data as an address, and includes a first address 25 and a last address 26 indicating the storage area on the memory 11, and In the analysis by the data analysis unit 24, a term consisting of a start address 27 indicating the data position at which processing should be started is provided corresponding to each graphic display data.

The operator specifies a figure to be displayed or a figure to be erased by inputting a figure number and an on/off designation from the keyboard 1.

The display figure selection register 23 consists of 1-bit status bits 28 each indexed by a figure number, and by turning on/off the status bit, it indicates whether or not the display of the corresponding figure is requested from the keyboard 1. However, in the initial state, all state bits are set to OFF, indicating an erased state.

When the communication control unit 21 receives the display/erase designation from the keyboard 1, it resets the corresponding bit in the display figure selection register 23 to ON for display designation and OFF for deletion designation.
Start the process in step 4.

After instructing the display control unit 3 to clear the displayed screen, the data analysis unit 24 scans the status bits 28 of the display figure selection register 23 in the order of figure numbers, and turns on/off each status bit. Process as described below.

The data analysis unit 24 includes a display figure selection register 2
The status bit 28 of No. 3 is checked, and if it is off, the process proceeds to check the status bit of the next figure number.

If the status bit 28 is on, the graphic control table register 22 is set by the corresponding graphic number.
is indexed, one of the graphic display data in the memory 11 is accessed based on the control data, and the graphic display data is analyzed in the same manner as in the prior art.

When the processing of one figure display data is completed, scanning of the display figure selection register 23 is restarted from the next figure number.

With the above control configuration, by adding a relatively small amount of control functions to the terminal system, graphic display/erasure in response to requests from the keyboard 1 can be sped up.
Also, the load on the host computer can be reduced.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, the graphic display terminal system in the information processing system speeds up the graphic display/erase response to requests from the keyboard by adding a relatively small amount of control functions, and This has a significant industrial effect in that the load on the host computer can be reduced.

[Brief explanation of drawings]

Fig. 1 is a block diagram of an embodiment of the present invention;
The figure is a block diagram of an example of a conventional configuration. In the figure, 1 is a keyboard, 2 and 20 are main control units, 3 is a display control unit, 4 is a display device, 5 is a host computer, 10 and 21 are communication control units, 11 is a memory, and 12 and 24 are data analysis units , 22 is a graphic control table register, and 23 is a display graphic selection register.

Claims (1)

[Claims] 1. In a terminal system that displays a figure based on figure display data transferred from a host computer 5, a memory 11 that holds the figure display data stores the figure display data according to the figure number. It has a graphic control table 22 configured to index control information, and a display graphic selection register 23 having a status bit corresponding to the graphic number, and when a predetermined input is received, the display graphic selection register 22 is configured to index control information. 23, corresponding to the figure number specified by the input, is set to a predetermined on/off display specified by the input, and when displaying a figure, the display figure selection register 23 is set. scans the status bit, and only when the status bit is set to the on display, displays the graphic for the graphic data determined from the graphic control table 22 by the graphic number corresponding to the status bit. A graphic display control method configured to perform processing.