KR970000273B1 - Apparatus for processing korean alphabet on p.c. - Google Patents

Abstract

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Description

Hangul processor in personal computer

1 is a block diagram of a Hangul processing apparatus in a conventional personal computer.

2 is a block diagram of a Hangul processing apparatus in a personal computer according to the spring invention.

3 is a detailed block diagram of the font storage / controller unit shown in FIG.

* Explanation of symbols for main parts of the drawings

1,10: graphics processor 2,20: video memory

3: Font Controller 4: Font ROM

5,40: Monitor 30: Font Save / Controller

31: interface unit 32: register unit

33: control unit 34: font address generation unit

35: font ROM 36: buffer

37: FIFO part

The present invention relates to a Hangul processing apparatus in a personal computer, and in particular, to improve the performance of the personal computer by reducing the load on the CPU of the personal computer during Hangul processing and to improve the Hangul font output speed by increasing the Hangul font output speed. A Hangul processing apparatus in a personal computer.

A Hangul processing apparatus in a conventional personal computer includes a graphic processing unit 1, a video memory 2, a font controller 3, a font ROM 4, and a monitor 5 as shown in FIG. When the CPU outputs the Hangul code input from the keyboard to the graphics processor 1 side, the graphics processor 1 outputs the Hangul code to the video memory 2 side and simultaneously outputs the address to the video memory 2 side. The Hangul code is then written to the text buffer of the video memory 2. At this time, the Hangul driver (Hangul processing program) of the CPU compares the Hangul code recorded in the text buffer of the video memory 2 with the Hangul code recorded in its internal buffer. It reads the Hangul code written in the text buffer and writes it to its internal buffer. Then, when the Hangul driver writes the Hangul code recorded in its internal buffer to the font controller 3 side, the font controller 3 reads font data corresponding to the Hangul code from the Hangul driver from the font ROM 4. Output to the CPU side. Then, the CPU stores the font data from the font controller 3 in the system memory, reads it, and writes it to the graphics buffer of the video memory 2 through the graphic processing unit 1, and then the graphics processing circuit 1 receives the video. The data recorded in the graphic buffer of the memory 2 is read out and displayed on the monitor 5 side through a digital to analog converter (DAC).

In the conventional Hangul processing apparatus as described above, the CPU reads font data applied from the font ROM 4 through the font controller 3 and stores the font data in the system memory. Thereby, there is a problem in that the performance of the personal computer is degraded because the CPU is heavily loaded due to the recording in the video memory 2. In addition, even if the CPU writes the font data to the system memory early, the CPU writes the font data to the video memory 2 so slowly that a bottleneck occurs, which causes a problem that the Hangul processing speed is lowered.

The present invention has been drawn to solve the problems described above, and by reducing the load on the CPU of the personal computer during Hangul processing, improves the performance of the personal computer and at the same time improves the Hangul font output speed to speed up the Hangul process. An object of the present invention is to provide a Hangul processing apparatus in a personal computer.

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

2 is a block diagram of a Hangul processing apparatus in a personal computer according to the present invention, and FIG. 3 is a detailed block diagram of a font storage / controller unit shown in FIG.

A Hangul processing apparatus in a personal computer according to the present invention includes a graphic processing unit 10, a video memory 20, a font storage / controller unit 30, and a monitor 40 as shown in FIG. When the graphics processor 10 records the Hangul code applied from the CPU to the video memory 20 side, the Hangul driver outputs the code value recorded in the video memory 20 to the font storage / controller unit 30 to store the font. The controller 30 outputs the font data corresponding to the code value, and the graphic processing unit 10 reads the font data output from the port storage / controller unit 30 and writes it to the video memory 20 to monitor the display 40. And the graphics processing unit 10 is referred to as an address and write enable signal (WE #; WE #, hereinafter WE # signal) to the video memory 20 and the font storage / controller unit 30 according to a control signal from the CPU. ), The low address strobe signal (referred to as RAS # signal) and the column address strobe signal (CAS #; referred to as CAS # signal hereinafter) to output the operation of the video memory 20 and the font storage / controller unit 30. To control. The font storage / controller unit 30 stores the combined font data and stores font data corresponding to the Hangul code applied from the CPU in accordance with the address, the WE # signal, the RAS # signal, and the CAS # signal from the graphic processing unit 10. Output to the graphics processor 10 side.

As shown in FIG. 3, the font storage / controller unit 30 includes an interface unit 31, a register unit 32, a control unit 33, a font address generator 34, a font ROM 35, and a buffer unit. 36 and the FIFO section 37 are provided. The interface unit 31 is for matching the CPU and the graphic processing unit 10. The interface unit 31 stores Korean code and font data length information (information for selecting the number of bits of output font data) supplied from the CPU. And the address, the WE # signal, the RAS # signal, and the CAS # signal supplied from the graphic processing unit 10 are transferred to the control unit 33 side. The register unit 32 records and stores the Hangul code and font data length information supplied through the interface unit 31, outputs the Hangul code to the font address generator 34, and outputs the Hangul font and font data length. The information is output to the control unit 33 side. The control unit 33 according to the address, WE # signal, RAS # signal, CAS # signal and the information stored in the register unit 32 supplied through the interface unit 31, font address generator 34, font ROM 35 ), While controlling the operation of the buffer unit 36 and the FIFO unit 37, and outputting the output enable signal OE # to the video memory 20 side, by reading the Hangul code of the register unit 32. Determines whether the Hangul code is a combined type or complete type, outputs a combined / complete type notification signal to the font address generation section 34, outputs an output control signal to the font ROM 35 side, and registers 32. An output enable signal (OE) for reading the font data length information of the FIFO unit 37 and outputting an output bit control signal to the FIFO unit 37, and prohibiting the output of the video memory 20 when outputting the font data of the FIFO unit 37. #) Is output to the video memory 20 side. The font address generator 34 generates a corresponding address for outputting the combined font according to the Hangul code supplied from the register unit 32 and the combined / complete type notification signal supplied from the control unit 33, so that the font ROM 35 is generated. Output to the side. The font ROM 35 stores the combined Hangul font data, and outputs font data corresponding to the address supplied from the font address generator 34 to the buffer unit 36 in accordance with an output control signal from the controller 33. do. The buffer unit 36 transfers font data from the font ROM 35 to the original QN 37 side. The FIFO 37 receives and stores the font data from the buffer unit 36, adjusts the predetermined bit according to the output bit control signal from the control unit 33, and outputs it to the graphic processing unit 10 side.

The Hangul processing apparatus of the present invention operates as follows.

First, when the CPU outputs the Hangul code input from the keyboard to the graphics processor 10 side, the graphics processor 10 outputs the corresponding Hangul code to the video memory 20 side and at the same time, the address, WE # signal, RAS #. Signal and the CAS # signal are output, and the corresponding Hangul code is recorded in the text buffer of the video memory 20. Then, the Hangul driver of the CPU compares the Hangul code recorded in the text buffer of the video memory 20 with the Hangul code recorded in its internal buffer, and when the Hangul code values are different, the Hangul driver recorded in the text buffer of the video memory 20 Read Korean code and write it to its internal buffer. Then, the Hangul driver writes the Hangul code recorded in its internal buffer to the font storage / controller unit 30 along with the Fonto data length information. At this time, the graphic processor 10 outputs a designated address, a WE # signal, a RAS # signal, and a CAS # signal according to a command from the CPU Hangul driver, and some of the addresses output by the graphic processor 10 are stored in a font. / Controller section 30, the best 1 kbit address is assigned to the font storage / controller section 30. The buffer unit 31 of the font storage / controller unit 30 includes a Hangul code including font data length information applied from a Hangul driver of the CPU, an address from the graphic processor 910, a WE # signal, a RAS # signal, and a CAS. When the # signal is received, the Hangul code including the font data length information from the Hangul driver is transmitted to the register unit 32, and the address, the WE # signal, the RAS # signal, and the CAS # signal from the graphic processing unit 10 are transmitted. Transfers to the control unit 33 side. When the control unit 33 receives an address through the buffer unit 31, the controller 33 checks whether the corresponding address is the highest 1 kbit address assigned to the controller 33, and performs a control operation according to the WE # signal when the highest address is received. The control unit 33 reads the Hangul code of the register unit 32, outputs the combined / completed notification signal of the Hangul code to the font address generating unit 34 side, and outputs an output control signal to the font ROM 35 side. The output bit control signal is output to the FIFO unit 37 side in accordance with the font data length information of the register unit 32, and the output enable signal OE # is output to the video memory 20 side. The font address generation unit 34 sets an address for outputting the combined Hangul font data according to the Hangul code from the register unit 32, the Hangul code from the control unit 33, and the combined / completed notification signal from the control unit 33. Output to the font ROM 35 side. The font ROM 35 outputs the combined Hangul font data corresponding to the address from the font address generator 34 to the FIFO unit 37 through the buffer unit 36 in accordance with an output control signal from the controller 33. do. The FIFO unit 37 adjusts the font data applied through the buffer unit 36 to a predetermined number of bits according to the output bit control signal from the control unit 33 and outputs the font data to the graphic processing unit 910. At this time, the video memory 20 stops outputting the data according to the output enable signal OE # applied from the control unit 33 of the font storage / controller unit 30, which is a function of the video memory 20 on the data bus. This is to prevent the output data from colliding with the output data of the font storage / controller unit 30. The graphic processing unit 10 temporarily stores the font data received from the font storage / controller unit 30 and stores the font data according to the video memory 20 address designated by the CPU Hangul driver. Thereafter, the graphic processor 10 reads the font data of the video memory 20 and performs graphic processing and displays the graphic data on the monitor 40 side.

In the above, the present invention has been applied and explained in the case of Hangul processing, but the present invention is not limited thereto and can be applied to the Chinese characters as described above.

As described above, when the font data is recorded in the video memory during Hangul processing, the present invention directly records the video memory without passing through the CPU, thereby reducing the load on the CPU and improving the performance of the personal computer. . In addition, the Hangul font output speed can be improved by about 10 times compared to the conventional one, it is possible to perform the Hangul process at high speed.

Claims (2)

A monitor for displaying Korean characters; A Hangul processing apparatus in a personal computer having a video memory for storing character code and font data, wherein the font data is stored and operated in accordance with an applied address, a write enable signal, a row address strobe signal, and a column address strobe signal. A font storage / controller section for outputting font data corresponding to a character code from a CPU to the graphics processing section and outputting an output enable signal for stopping output of the video memory to the video memory side; Outputs an address, a write enable signal, a row address strobe signal, and a column address strobe signal to the video memory and the font storage / controller section under control of the CPU, and transmits character codes input and output between the CPU and the video memory, And a graphic processor for graphicly processing font data of the video memory and outputting the graphic data to the monitor side. According to claim 1, wherein the font storage / controller unit Interface unit for matching the CPU and graphics processing unit; A register unit for storing a character code including font data length information applied from the CPU through an interface unit; Outputting an output enable signal and an output bit control signal in response to an address, a write enable signal, a low address strobe signal, and a column address strobe signal applied from the graphic processor through an interface unit. A control unit for outputting; A font address generation unit for outputting an address corresponding to a character code from the register unit according to the combined type / complete type notification signal from the control unit; A font ROM for storing font data and outputting font data corresponding to an address from the font address generator in accordance with an output control signal from the controller; A buffer unit for transferring font data from the font ROM; And a FIFO unit which adjusts font data from the buffer unit to a predetermined bit according to an output bit control signal from the controller and outputs the font data to the graphic processor.