JPH04199284A - Display device - Google Patents

Abstract

PURPOSE:To improve the data processing time as compared with the method which successively decodes commands by directly transferring data having segment memory storing commands of the output data of a computer to a segment memory. CONSTITUTION:The output data of a computer are stored in a reception buffer in an interface processing section 1. A command is attached to the leading edge of the output data and, when the command is a segment memory writing command, a memory control processor 7 is actuated and transfers the data following the command to a segment memory 3. Since the data are directly written in the segment memory 3 in such way, the processing speed can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a display device that displays characters or figures as images.

[Prior art 1] Figure 2 is a diagram showing the configuration of a conventional display device. In the figure, (1) is an interface processing unit that inputs and outputs data with a data processing device such as a computer. , (2) is a main processor that controls the entire display device, (3) is a segment memory that stores display commands, and (4) is a segment memory that decodes the display commands in the segment memory and draws them to the display memory (5). (5) is a display memory that holds display patterns; (6) is a CRT display unit that actually displays.

Next, the operation will be explained. Interface processing unit (
1) processes output data from a data processing device (not shown) such as an electronic computer and transmits it to the main processor (2). The main processor (2) decodes this output data and constructs a display command group (hereinafter referred to as a display segment) on the segment memory. It also performs various control operations such as starting drawing processing and erasing/replacing segments according to the contents of the output data. The display processing unit (4)
The display segment is read and drawn in the display memory (5). The display pattern held in the display memory (5) is periodically read out and transmitted to the CRT display section (5) for display.

[Problem to be Solved by the Invention 1] Conventional display devices are configured as shown below, so even when displaying fixed content, command generation processing, coordinate conversion processing, and display processing on the computer side are required. 1.
・Command decoding processing and segment memory construction processing are required on the device side, making it impossible to improve performance and making it impossible to further speed up the processing speed of image display data. There was a problem.

In order to solve the above-mentioned problems, conventional
There was a graphic display device disclosed in No. 3-45629. When transferring pre-programmed segment data from a host computer to a graphic CRT display device, this device transfers segment data from a host computer to a graphic CRT display device prior to data transfer. 2. Transfer the data load command with
After the display device is prepared to receive data, the segment memory is transferred using the DMA method. However, this device requires the transfer and processing of load control data before data transfer at the data transfer source and destination, and these processes may affect the C-segment data transfer method. There is.

This invention was made in order to solve the above-mentioned problems. ``C1 improves the data processing speed by realizing data writing directly to the segment memory.'' The purpose of the present invention is to provide a display device that can perform the following functions.

[First step to solve the problem] The display device according to the present invention constructs a display=1 cloak group for image display obtained by sequentially processing data input from a computer in a segment memory. Displays the image display pattern according to the main processor and the display command group constructed above.
This system is equipped with a control section, and a control processor that reads data having a segment memory storage command from among the data manually inputted from the above-mentioned Fi computer and directly stores it in the segment memory. .

[Operation] The memory control block included in the present invention transfers data having a segment memory storage command directly to the segment memory among the output data from the computer, thereby sequentially decoding the cloak. The C1 processing time is reduced compared to the other methods.

〔Example] Embodiments of this invention will be described with reference to the drawings.

In Figure 1, (1) is an interface processing unit that inputs and outputs data with a data processing device such as a computer, (2) is a main processor that controls the entire display device, and (3) is a display unit. (4) is a display processing unit that decodes the contents of the segment memory and draws on the display memory (5); (5) is a display memory that holds display contents; (6) (7) is a memory control processor that transfers data from the interface processing section (1) to the segment memory (3).

Next, the operation will be explained.

The reception buffer inside the interface processing unit (1) stores output data from the computer. There is a command at the beginning of this output data, this :l ′:? When a command message is input, the memory control processor (1) operates and segments the following data.・Transfer to memory. If the first ml mantle is other than the above, the main processor operates, decodes the following data as a command, and stores the data directly into the segment memory which performs the same operation as described in the description of the prior art. Lt.
, the main program X-7 Setsuna sequentially decodes and constructs the commands and has the same content. Normally, a program (computer side) reads the segment and memory contents after performing segment construction in sequential processing, and transfers the contents as output data.

Since the total capacity of segment memory is very large, f~
In order to divide the transfer, the memory address and data length are specified as part of the segment write command. The memory control processor operates based on the designation of this parameter.

In the above example, a memory control processor is provided, but it can also be realized using the memory-to-memory transfer function of the main processor, and the same effect as in the above embodiment can be obtained.

[Effect of the Invention 1 As described above, according to the present invention, the higher-level 4W machine attaches a segment memory storage command to the data for constructing a display command group in the segment memory, and the memory control processor When a command is detected, this data is transferred directly to the segment memory and a display command group is constructed, which has the effect of increasing the data processing speed.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the configuration of a display device according to an embodiment of the present invention, and FIG. 2 is a diagram showing the configuration of a conventional display device. (1) is an interface processing section, (2) is a main processor, (3) is a segment memory, (4) is a display processing section, (5) is a display memory, (6) is a CRT display section, (
7) is a memory control processor. In the drawings, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Claims] A main processor that builds a group of display commands for image display obtained by sequentially processing data input from a host computer in a segment memory, and a display control that holds an image display pattern in the display memory according to the group of display commands built above. A display device comprising a memory control processor that reads data having a segment memory storage command from among the data input from the host computer and directly stores it in the segment memory.