JPH04140796A - Information processor - Google Patents

Abstract

PURPOSE:To facilitate software control by providing a control register which is stored with the character kinds of character patterns and common character codes and an address generating circuit which analyzes the contents of the control register and automatically generates address information necessary for a character generator. CONSTITUTION:A source address conversion and generation part 3 calculates the address of a target character generator 7 according to the contents of the control register and supplies the address to the character generator 7 at necessary timing with the control signal from a sequencer 4. A destination address generation part 5 supplies an address to an image memory at necessary timing with the control signal from the sequencer 4 according to a destination address stored in the control register 2. An arithmetic part 6 writes data in the image memory 8 in various forms when writing the data read out of the character generator 7 in the image memory 8.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an information processing device, and particularly to an information processing device having a character generator as a component.

[Conventional technology]

Conventionally, when displaying characters on a CRT, this type of information processing device reads a character pattern from a character generator stored in a ROM or the like, writes the character pattern to an image memory, and displays the character on the CRT. When reading a character pattern, the mask device was aware of the address information of the character pattern that it wanted to read and gave that address information to the character generator. had to be managed.

As shown in FIG. 2, the character generator 11 has various character patterns of the same character with different character sizes and fonts, and these are stored at different addresses. When the mask device 9 reads character patterns from the character generators 11, different address information is given to the character generator 11 depending on the type of character even if the same character is used. Control was extremely complicated as a large amount of address information had to be managed.

[Problem to be solved by the invention]

When the above-mentioned information processing device reads character patterns from a character generator, the mask device is aware of different address information depending on the type of character pattern and supplies it to the character generator for reading, so the more types of characters there are, the more address information had to be managed.

The purpose of the present invention is to improve the above-mentioned drawbacks, and to automatically generate addresses by simply setting a character code common to the character types of the characters to be read, so that the mask device can read the required character pattern from the character generator without being aware of the address at all. An object of the present invention is to provide an information processing device that can perform the following operations.

[Means to solve the problem]

The information processing device of the present invention analyzes a control register that stores the character type and common character code of a character pattern to be read from a character generator, and the contents of the control register, and automatically generates necessary address information for the character generator. It is configured by including an address generation circuit.

〔Example〕

Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of an information processing apparatus according to an embodiment of the present invention. In FIG. 1, one embodiment of the present invention includes a control register 2 in which information such as character code character size, character type, destination address operation sequence, etc. is stored according to a command from a mask device 1; It includes an address generation circuit consisting of a source address conversion generation section 3, a destination address generation section 5, and a sequence 46, which apply a necessary control signal according to the contents of the control register 2 and generate an address to the character generator 7.

The source address conversion generation unit 3 manages the address of the character generator, determines the address of the target character generator 7 from the contents of the control register 2, and sets the required timing using a control signal from the sequencer 4 that controls the operation sequence and timing. supplies the address to the character generator tuff. The destination address generation unit 5 manages address information of the image memory, and supplies addresses to the image memory at required timings based on the destination address stored in the control register 2 and a control signal from the sequencer 4.

The calculation unit 6 converts the data read from the character generator or the contents of the image memory into various forms.
When data read from the character generator 7 is written to the image memory 8, the data is written to the image memory 8 in various forms. This causes the mask device 1 to read a certain character from the character generator 7, write it to the image memory 8, and write it to the CRT. When it is desired to display characters, this can be done simply by setting the necessary information in the control register 2.

〔Effect of the invention〕

As explained above, the present invention allows the mask device to read certain characters from the character generator, write them to the image memory, and display the characters on the CRT by simply setting the necessary information in the control register, so software control is very easy. It has the advantage of being simple.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the present invention, and FIG.
The figure is a block configuration diagram showing a conventional information processing device. 1.9...Mask device, 2...Control register,
3... Source address conversion generation section, 4... Sequencer, 5... Destination address generation section, 6.
... Arithmetic unit, 7, 11... Character generator,
8゜10... Image memory.

Claims (1)

[Claims] Information processing characterized by comprising a control register that stores the character type and character code of a character to be read from a character generator, and an address generation circuit that analyzes the contents of the control register and automatically generates a required address for the character generator. Device.