KR950001063B1 - Two byte completion type korean character processing method using pattern rom - Google Patents

Abstract

In the Hangul processing method of teletext, the method improves the processing time per character by using pattern ROM. The pattern ROM is located in the partial region of a program ROM. Using this method, font data reading time is faster than other methods and program is more easily made out. This method uses a buffer (20) that latches the first address data and outputs it, a program ROM (30) that outputs program data, a pattern ROM (40) that outputs font data.

Description

2-byte Completion Hangul Processing Using Pattern ROM

1 is a circuit diagram for carrying out a preferred embodiment of the present invention.

2 is a memory map according to an exemplary embodiment of the present invention.

3 is a flow chart according to a preferred embodiment of the present invention.

* Explanation of symbols for main parts of the drawings

20: buffer circuit 30: program ROM

40: pattern rom

The present invention relates to Hangul data processing in Teletext, and more particularly, to a method of reading data stored in a memory.

In general, the Hangul processing teletext is a program ROM containing a predetermined program for operating the system in response to an operator's selection mode and a pattern ROM storing font data for a font per letter of the Hangul. Therefore, when the operator files the file (File) to be transmitted through the keyboard, the teletext is a font data stored in the pattern rom by the program of the program to input the file input from the keyboard. You need to read the file and create the file to send it.

In general, the conventional Korean text processing method of teletext takes the form of processing a 2-byte complete Hangul using a 3-byte writing method, or installs a pattern ROM separately from a program ROM, selects only the pattern ROM, and then buffers the buffer. Read the font data through or read the font data of the pattern ROM temporarily stored in the RAM (RAM), and reads the font data stored in the RAM for filing to create a file to send.

However, the above-described conventional Hangul text processing method of the teletext has a problem that a program stored in the program ROM is complicated due to a bypass operation of filing a file character. In addition, there was a disadvantage that the Hangul processing speed is lowered due to the above problems.

Accordingly, an object of the present invention is to provide a Hangul processing method using a pattern rom which can improve the processing speed per character by banking the pattern rom in a part of the program rom in the Hangul processing method of the teletext.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

)에 응답하여 상기 마이콤의 제2어드레스 포트로부터 입력되는 제2어드레스데이타(A0~A15) 입력받으며, 소정 어드레스구간이상의 어드레스 지정시 상기 지정된 어드레스에 해당하는 프로그램 데이타를 독출하여 상기 마이콤을 출력하는 프로그램롬(30)과, 사이 마이콤으로부터 인가되는 상기 칩인에이블신(

)에 응답하여 상기 제2어드레스데이타(A0~A15)중 A0~A11 어드레스데이타와, 상기 버퍼(20)로부터 래치 출력되는 상기 제1어드레스데이타(A0~A6)을 입력받으며, 상기 두 어드레스 데이타의 조합에 따라 지정되는 어드레스에 저장된 폰트 데이타를 독출하여 상기 마이콤으로 출력하는 패턴롬(40)으로 구성된다.FIG. 1 is a circuit diagram for performing a preferred embodiment of the present invention, and is a first address input from a first address port of a microcomputer in response to a selector signal Select from a microcomputer (not shown). A buffer 20 for latching out the data A0 to A6 and a chip enable signal input from the micom

Receives the second address data (A0 ~ A15) input from the second address port of the microcomputer in response to a), and outputs the microcomputer by reading the program data corresponding to the designated address when addressing more than a predetermined address section ROM 30 and the chip enable scene applied from the microcomputer (

A0 to A11 address data among the second address data A0 to A15 and the first address data A0 to A6 latched and outputted from the buffer 20 are inputted in response to the second address data A0 to A15. And a pattern rom 40 which reads font data stored at an address designated by the combination and outputs the same to the microcomputer.

FIG. 2 is a memory map according to an exemplary embodiment of the present invention, and shows that the pattern ROM 40 is included in an extended memory form in a portion of the program ROM 30.

3 is a flow chart according to a preferred embodiment of the present invention. The first code data is input from a keyboard (not shown) to generate first address data A0-A6 corresponding to the code data, and the selector signal is selected. Outputs the first address through the buffer 20 and then turns off the selector signal, and after performing the pattern rom selection process, the microcomputer receives the second code data from the keyboard. After calculating the character-to-letter displacement, the font data reading process is performed by reading the font data corresponding to the displacement from the pattern rom 40.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to FIGS. 1 to 3.

In general, a 2-byte complete Hangul is composed of 94 columns and 94 lines. If a character font is defined as 16 x 20 bits, one character font data consists of 40 bytes, and the font data constituting 94 lines and 1 column is approximately. It requires about 4 x 1000 bytes of memory. Therefore, font data constituting 94 columns x 94 rows requires a memory capacity of about 374 × 1000 bytes, and the pantomrom 40 should use a ROM of about 374K bytes. However, according to the present invention, as shown in FIG. 2, the patterned memory 40 is allocated to the extended memory area of the program ROM by configuring the patterned ROM 40 as a plurality of patterned ROMs having a memory capacity of about 4 bytes. The banked memory area is used as a partial area of the program ROM 30.

First, the microcomputer receives the first coding data of the 2-byte complete code from the keyboard in step 3-1, and decodes the corresponding section in the pattern ROM 40 to designate the upper address of the pattern ROM region (A0 to A6). In operation 3-2, the selector signal Select in the enabled state is output to the buffer 20. In operation 3-3, the first address data A0 to A6 are received in response to the selector signal Select to be latched to the pattern ROM 40. Thereafter, the microcomputer turns off the selector signal Select output to the buffer 20 in a disabled state in steps 3-4.

In step 3-5, the microcomputer receives the second coding data of the 2-byte complete code from the keyboard, decodes the corresponding section, calculates the displacement according to the coding data in steps 3-6, and encodes the coding in steps 3-7. Generates the second address data A0 to A15 having a value of # 00 that specifies the starting address of the lower address for reading the font data corresponding to the displacement of the data, and the program ROM 30 and the pattern through the second address. Output to ROM 40. In step 3-8, the microcomputer reads font data read from the corresponding address area corresponding to the second address data A0 to A15 in the banking memory area corresponding to the first address data A0 to A6. Process. That is, in step 3-8, the pattern rom 40 inputs the lower 12-bit address data A0 to A12 of the second address data A0 to A15 input from the microcomputer to input the 12-bit address data ( A microbyte is output by reading font data of 1 byte stored in the address area designated by A0 to A12, and the microcomputer processes the read font data of 1 byte. Thereafter, in step 3-9, the second address data A0 to A15 is added by 1, and in step 3-10, the first second address data A0 to A15 is increased by 1 to be programmed through the second address. Output to the ROM 30 and the pattern ROM (40). That is, the microcomputer performing steps 3-8 compares the steps of (3-8) to (3-10) by comparing whether 40 is added from the second address data A0 to A15 in step 3-9. The 40-byte font data is repeatedly read from the banking memory area corresponding to the first address data A0 to A6 of the pattern ROM 40 and processed.

As described above, the present invention configures an extended memory region associated with a partial region in the program ROM by patterning the ROM into a predetermined amount of memory so that font data can be directly read without using RAM or a buffer. It is faster to read font data than the conventional method of installing pattern ROM separately from byte completion type Hangul processing format or program ROM and reading phone data of pattern ROM through RAM or buffer. have.

Claims (1)

First storage means having a predetermined control program, second memory means for dividing a predetermined memory area, connecting the divided memory area to a banking memory area, and storing font data in each banking memory area, and predetermined data; In the Hangul processing method of the microcomputer connected to the third storage means for buffering the output; A selection signal output step of receiving, by the micom, first code data input from the outside and generating and outputting a selection signal for selecting the first and second storage means to the first and second storage means in response thereto; A selection signal for outputting the second storage means through the third storage means for the first address data for designating the banking memory area corresponding to the code data by the microcomputer; A banking memory region designation step of generating and outputting the first and second storage means to the first and second storage means and turning off the selection signal: the microcomputer calculates the letter-to-character displacement corresponding to the code data in response to input of second code data from the outside; And generating and outputting second address data corresponding to the letter-to-letter displacement, and reading and processing font data corresponding to the letter-to-letter displacement in the banking memory area corresponding to the first address data. 2 byte complete Hangul processing method using a pattern rom characterized in that.

Images