KR810001078B1 - The composition system of korean alphabet - Google Patents

Abstract

This system is for a combined use of microprocessor korean-English CRT display device which consists of the character information memory devices(1)(2), two sets of the character display devices (5)(6) using two-byte video information display device and two sets of line buffers (3)(4), and the first and second image synthesizer(NAND GATE 1,NAND GATE 2).

Description

Hangul writing method by retrieving 2-byte screen information of Korean and English CRT terminal device

1 is a block diagram of a Korean-English terminal device using a microprocessor.

2 is a detailed block diagram of the present invention.

Figure 3 is a detailed view of the image synthesis of the present invention.

The present invention relates to a character information storage and retrieval method and a synthesis method of characters in a CRT (Cathode, Ray tube) terminal device combined with a microprocessor (Micro, Processor).

Since Hangul is a complex structure with several phonemes, unlike English with a short sentence structure, the construction of a CRT terminal device by a microprocessor is inevitable. The problem is how to easily combine and combine complex structures, or There is a problem that information can be efficiently processed while reducing the burden on the central processor, and that the product can be produced at a low price. Conventionally, as shown in FIG. If the character information is input from other peripheral devices and stored in a certain position of the screen information extracting unit and the screen control unit and the promised text information storage unit according to the character input procedure of the central processing unit, the stored character information is displayed on the screen information. It is drawn out by the drawing unit, and the extracted information is converted into an image and displayed on the screen. Is output.

At this time, the screen information retrieval unit withdraws the character information without being interrupted by the central processing unit. During this operation, the central processing unit becomes a hold state, which affects the screen information retrieval unit withdrawing information independently. Can not be done.

However, in the CRT terminal, which is generally used, the superiority of performance can be determined by the excessive amount of idle time (time required for screen information retrieval). This is how much information can be processed by the central processing unit for a certain time. That is, the smaller the time occupied by the screen information retrieving unit during the entire time, the larger the amount of time or information that the central processing unit can process.

Therefore, the present invention forms the character information memory unit (1) (2) by dividing the character information memory unit into two, as shown in FIG. 2, in order to minimize the downtime of the central processing unit and simplify the image storage unit (ROM). It uses a common address and is configured to enable 2-byte information retrieval using a data bus isolator between the character information storage units (1) and (2). When described in detail with the accompanying drawings as follows.

That is, as shown in FIG. 2, a storage controller is connected to a central processing unit, a screen control and a text information extracting unit, and two storage units 1 and 2 and a data buso isolator controlled by this storage unit are connected, respectively. After connecting so as to use a common address, the line buffers 3 and 4, which are supplied with a clock signal from the screen control and character information extracting unit, are connected to the storage units 1 and 2, and then again. Connect the output of the line buffer (3) (4) to the lowercase generator (5) (6) receiving the lowercase selection signal, and then output the output signal of the lowercase generator (5) (6) to the primary image synthesizer. After connecting to NANDGATE 1, connect the output of the primary image synthesizer (NANDGATE 2) to one input of the secondary image synthesizer (NANDGATE 2), and one input of the primary image synthesizer (NANDGATE 1). So that the output from the output can be used as one input Integral output of the secondary video combiner (NAND gate 2) is a hayeoseo connection configuration for use as a video output signal via the serial converter structure.

The present invention of such a structure receives information from the central processing unit. During the output, the two storage units 1 and 2 are alternately selected so as to be a proper address by the storage controller, and Data-Buts-isolation also performs an equivalent operation. By retrieving the screen information, the data bus isolator is in an isolation state, the central processing unit is in an idle state, and the two separate storage units 1 and 2 are separated from the screen control and character information extracting unit. Simultaneous selection (Simultaneous, Selection) receives the same address, and the central processing unit outputs each information stored in accordance with a certain rule in advance through separate data busses.

On the other hand, the output information is line buffers connected to the data busses of each information storage unit (3) (4) (Line Buffer). The line buffers (3) and (4) that store all information for one line by operating two line buffers (3) and (4) at the same time without alternating operation, as is commonly found in English terminal devices. It is continuously rotated while outputting a character image on the screen, and this output is input to the address of each of the two lowercase image generators 5 and 6 to operate to output an image of a proper character.

In other words, in order to describe the operation in more detail,

First, when a Hangul character is input to the central processing unit from a peripheral device including a character board (Key Board) of FIG. 1, the Hangul character input includes a plurality of lowercase information, that is, a consonant consonant (C ₁ ) and a neutral vowel (V). _1), kkolin of the trailing bar (V _2), trailing consonant _{(C 2) "C 1 +} V 1 + V 2 + C 2" or kkolin "C of the leading consonant (C ₁₎ leading consonant trailing bar (C _{2) 1} + V + C ₂ 꼴 is input to the information storage.

In the present invention, the former form (C ₁ + V ₁ + V ₂ + C ₂ ) will be described as an example.

로 표시할 수 있으며 이를 중앙처리부 ＂C₁＂을 정보기억부(1)는 ＂V₁＂을 정보기억부(2)는 ＂V₂＂를 다시 정보기억부(1)로 ＂C₂＂를 다시 정보기억부(2)로 각각 입력시켜 한개의 완전한 문자꼴을 모두 기억시킨다. 이때 정보기억부(1)(2) 내의 기억된 정보내용은 다음과 같이 나타낼 수 있다.＂곽＂

The central processing unit ＂C ₁ ＂, the information storage unit (1) ＂V ₁ ＂, the information storage unit (2) ＂V ₂ 다시 back to the information storage unit (1)＂ C ₂ ＂ Each of them is inputted back into the information storage unit 2 so as to store one complete character font. At this time, the stored information content in the information storage unit (1) (2) can be expressed as follows.

로 나타나며

Appears as

Where n is the address from the central processing unit.

In order to output the stored information to the screen, it is drawn out to the screen control and the character information extracting unit. At this time, the data bus isolator is in an isolated state and the central processing unit is stopped. By combining n + 1 'with the address #n' of the screen control and character information extracting unit and simultaneously addressing (Adderssing), the two information storage units (1) and (2) simultaneously select the information storage unit (1) (2). ) Outputs simultaneously. That is, when C ₁ and V ₁ are simultaneously drawn out and recorded in the line buffers (3) and (4), they are input to the buffers (3) and (4). By drawing ＂V ₂ ＂ and ＂C ₁ 으로 in the same way as above, the Buffer (3) (4) temporarily stores one line of information in series, and the stored information can be shown as follows. have.

Where n is the rotation memory address of the hopper 3 (4).

In this way, once the screen information once inputted is repeatedly used by the Buffer 3 and 4 until the screen outputs all the lines of the screen, the central processing unit can use enough time for the information processing process. The ratio of time is p4.5%. At this time, the driver Buffer (3) (4) is rotated (Recirculation shift) by the appropriate clock signal (Clock Signal) generated in the screen control unit of the screen control and character information extraction unit, the output is two lowercase generator (5) 6 that (ROM) is input as an address to obtain the video output of a suitable character lowercase if Lai buffer 3 (4) is in the "n" position, chair case cord for the C ₁ and V ₁ (Code) that is output, the output of which characters by respectively generating an image in the form of case, C ₁ and the primary image synthesizer of the magnetic case images V ₁ (the NAND gate 1) are supplied to the synthesis, and then, the first video memory Temporary memory in the image catch (delayed by the clock time of the clock signal of the buffer (3) (4)), followed by the buffer (3) (4) and lowercase letter (5) (6) and the first video synthesizer (the NAND gate 1) to the Phoneme image of V ₂ and C ₂ is output through the secondary image synthesizer (NAND 2) The lowercase letter selection signal supplied to the two lowercase letter generators (5) and (6) is synthesized in the form 2 and is output from the buffer (3) (4). The output is generated by the screen control unit of the screen control and character information extracting unit so as to select each character group consisting of C ₁ and V ₁ and V ₂ C ₂ .

On the other hand, if you associate this whole process with the Liberator (3) (4) and the rotation clock signal,

According to the present invention which operates as described above, a two-byte drawing method is used when screen information is fetched, and two Liberators 3 and 4 are operated in parallel to increase efficiency of the central processing unit. In addition, the conventional 3-4 trillion letter generator structure is combined with the 2-byte drawing method and the two-row method by using the low speed and high density ROM (ROM) to minimize the manufacturing space and inexpensive. It is possible to construct a high-performance Korean-English CRT terminal device at a price.

Claims (1)

As shown in the figure, as described above in the text, the character information storage unit (1) (2) and 2-byte screen information retrieval composed of two sets and two sets of parallel line buffers (3) (4) (Line Buffer) 2) of the Korean-English CRT terminal device comprising a combination of two sets of lowercase letter generators (5) (6) and 1. secondary video synthesizers (NANDGATE 1, NANDGATE 2). -Hangul writing method by retrieving byte screen information.

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