JPS61248081A - Character generation system for computer system - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a character generation method for a digital computer system, and in particular to a method for generating kanji characters directly using a hardware circuit without requiring the central processing unit of the digital computer system to perform unnecessary work. Regarding the character generation method that executes.

BACKGROUND OF THE INVENTION Most of the methods for generating Kanji video character signals currently used in computers are generally in one of two formats, using graphic bitmap methods. Referring to Figure 1, in the graphic bit map method, kanji are first dynamically accessed using a dot-dot method where each dot corresponds to a dot cell on the screen.
memory (dynamic RAM). This type of video signal generating device further has a corresponding memory, in which the character of the point to be displayed is written from the dynamic RAM using a software program. Therefore, when the central processing unit (CPU) handles the generation and display of kanji, it incurs a huge amount of extra cost in addition to the processing of the operating system (0,S,) and application software programs.
This results in slower display speed. Furthermore, memorizing kanji occupies a large amount of memory, significantly increasing the cost.

Graphic bitmap methods include two types:

(al) Referring to FIG. 2, this method utilizes a kanji generator that stores a large number of basic patterns of kanji, and character generation software that synthesizes kanji using several types of basic patterns. The main drawbacks of this method are that the generation rate is at most 30 to 60 characters per second and that the composite characters must be stored in their respective display memories.

This requires the CPU to do extra work to process character occurrences, and the user must pay for the time required to display the characters.

(a2) Referring to FIG. 3, this method uses a read-only memory (ROM) in which Chinese characters are written when the CPU searches for characters and stores them in the display memory. This type of system wastes a large amount of memory to store the Kanji, takes a lot of time to search for the Kanji, and furthermore, the number of Kanji that can be stored for display is insufficient.

Furthermore, in conventional computer systems, the CPU handles the special character spacing that must be added at the top and bottom of Chinese characters that are slightly apart from each other on different lines to be displayed. This inserts a spacing code 0OH ("H" generally represents a hexadecimal number in the computer field) into an appropriate location in the display memory corresponding to the spacing between the characters on the screen that are entered by key, but the spacing A large amount of memory space was wasted storing the code, while the CPU had to do extra work to handle character spacing. Moreover, conventional computer systems use multiple logic gates, counters, and oscillators to achieve some special display effects, such as inversion, flash, underline, and highlight, which significantly increases the cost. Ta.

A character generation system for a digital computer system according to a preferred embodiment of the present invention seeks to remedy the above-mentioned drawbacks.

Another object of the present invention is to provide a character generation method for a digital computer that quickly and appropriately performs character generation processing using a hardware circuit.

Another object of the present invention is to provide a character generation system using means for automatically adding character spacing to keyed characters, thereby saving CPU processing time.

Still another object of the present invention is to provide a character generation method using a special display effect processing device that can easily obtain several types of display effects without designing complicated hardware circuits.

Still another object of the present invention is to provide a character generation method that uses means for identifying characteristics of characters keyed in by a user in order to treat occurrences of Chinese characters and alphabetic characters separately and appropriately.

Means for Solving the Problems The computer character generation system according to the present invention includes a keyboard input/output device that is connected to a keyboard and converts keyed character signals into codes, and a keyboard input/output device that receives and stores codes. a code buffer connected to a keyboard input/output device, a cathode ray tube controller connected to the code buffer and configured to scan the code buffer and output a code to an output port of the code buffer; and a code buffer and cathode ray tube controller. Connected to the cord and cathode ray! '#J ill M A multiplexer that collects the scanning line signals from the scanning address port of the IF and outputs the address code, and a multiplexer that receives the address code. If the key input character is a kanji character, the key is input according to the address code. a memory that stores a plurality of kanji patterns that outputs a first pattern signal corresponding to an input character; a latch that is connected to the memory and receives the first pattern signal and latches it for a predetermined period of time; and a latch that is connected to the display device. The shift register is connected to the wrap, receives the first pattern signal, converts it into a series of video signals over a predetermined period of time, and sends the series of video signals to a display device.

Embodiment FIG. 4 shows a keyboard input/output device 110 connected to a keyboard (not shown) that converts a kanji or alphabetic character signal input by a user into a code corresponding to the input character, and a keyboard input/output device 110 connected to a keyboard (not shown). /A code buffer 120 connected to the output device 110 to receive and store codes; and a cathode ray tube control device connected to the code buffer 120 to automatically scan the code buffer 120 and output the code to the output port of the code buffer 120. 10 shows a character generation method according to the present invention using 10G. This method is the first
and second output ports 131 and 132, and is connected to the code buffer 12G to receive the output code, and if the key-input character is a kanji character, outputs the code to the first output port 131, and It consists of means 130 for identifying the characteristics of the keyed-in character, which outputs a code to a second output port 132 if the entered character is an alphabetic character.

If the keyed-in character is an alphabetic character, the second port 13
The code output in 2 is an alphabet generator commonly used in alphabet digital computer systems! ffi 135
A keyed second pattern signal is generated at the output port in a known manner.

If the keyed-in character is a kanji character, the code output to the first output port 131 is the scan line address port 1.
Cathode ray tube I! which receives the scanning line signal from 05! 1IJW device 10G is also connected to multiplexer 140. The multiplexer 140 collects the kanji code and the scanning line signal from the cathode ray tube controller 10G, and outputs the address code from the output port.

The address code is further stored in memory 15G to search for the first pattern signal of the keyed kanji.
It is sent to a memory 150 that stores a plurality of kanji patterns. In embodiments of the invention, memory 150 may be a masked read-only memory. The latch 16G is connected to the mask read-only memory 150 and the output of the alphabet generator @135, and receives the first or second character pattern signal;
Latch the pattern signal for a predetermined time. shift register 1
10 is connected to a latch 16G, which converts the pattern signal into a series of video signals for a predetermined period of time for display on the screen of a display device @190 connected to a shift register 170. The launch 160 is configured with means 165 for automatically adding character spacing to keyed characters to perform a character spacing function in hardware circuitry, as will be further described below. The special display effect processing device 180 is further connected between the shift register 110 and the display device M 190 as shown in FIG. Ru.

If only the kanji generation system is required, the identification means 130
It should be noted that the alphabetic character generator @135 can be excluded from the above embodiment. Obviously, the hardware circuit of such a kanji generation method provides the function of directly executing kanji generation processing without requiring the CPU to do any extra work.

In this embodiment, the keyboard input/output device 110 converts key-input Chinese characters into two unit code signals (one unit of which is 8 bits), and converts alphabetic characters into one unit code signal. Therefore, when an alphabetic character is keyed in by the user, the code buffer 120 outputs a single code, and when a Chinese character is keyed in, the code buffer 120 outputs two discontinuous codes. Furthermore, when the key-input character is an alphabetic character, the identification means 13G can add the code "00" to the code so as to output two codes to the second output port 132 at the same time. If the key-input character is a kanji, the identification means 130 selects the first output port 13.
It is also possible to wait until both of the Kanji codes arrive at the identification means 130 and are stored before actuating the two codes at the same time.

In the identification means 130 and the video signal generation process, the data code and characteristic code are generated synchronously.

A data code representing a specific character or figure is converted into a video signal by a hardware circuit and displayed on the screen of the display device 190. A characteristic code represents a characteristic, such as an alphabetic or kanji character, or a special effect such as reversal or flash.

Figure 5(a) shows a set of registers 10, 20, 20, 30, 40, 50 and 60 for temporarily storing data codes and for temporarily storing characteristic codes to identify the characteristics of keyed characters. , actuates the code stored in the register set and outputs the data hood to the first or second output port 131.
Or status register 1 to output correctly to 132
,2. and 3, and a state identification device further comprising a state decoding device @136. The status identification device consists of two lines or two identification bits ATO and ATl.
It is connected to the code buffer 12G via the code buffer 12G and performs the identification operation (see Table I). In this embodiment, when status register 2 is set to "1", status register 2 causes register 30 to operate, and when status register 2 is set to "0", causes register 40 to operate. Ru. The state decoding device 136 has two output ports, an output port C8 (Kanji start) connected to the register 60 and an output port ES (English character start) connected to the register 50, and also has two output ports, an output port C8 (Kanji start) connected to the register 60, and an output port ES (English character start) connected to the register 50. To begin, state register 1.2. and all outputs of 3 (see Table 3). The detailed functions of the identification means 130 will be explained below using an example.

Table ■ Examples are 5 letters, rAJ, r inside, sentence.

This is a case where "B" and "C" are entered by key.

The letter r as shown in Figure 5(b) and Tables I and π
Assume that code 81 of AJ arrives before registers 10 and 30 first. Since rAJ is an alphabetic character, the identification bits are ATO-0 and ATI-0, and status register 1
is set to O.

As shown in FIG. 5(C), when the first code 82 (the kanji has two codes) of the following kanji ``中'' arrives before registers 10 and 30, the previous code 81 is stored in register 2.
0 and into the register 30 at the same time.

Since code 82 is the first code for the Chinese character "chu", the identification bits are ATO-1, ATI-0, status register 1 is set to 1, and status register 2 is set to O.

Status register 2 operates register 40 and becomes "00".
Add code 83 to register 40.

As shown in Figure 5(d), the second code for the kanji ``Chinese 84''
When reaches before registers 10 and 30, code 81 of character rAJ and code 83 of "00" are simultaneously stored in register 5.
Stored as 0. Since rAJ is an alphabetic character, from Table 1, the status decoding device @ 136 operates the register 60 to start generating alphabetic characters, codes 81 and 83 are converted to video signals,
Character rAJ to general alphabet generator 1350 characters III
Lunch 160 with interval generating means 165. 170° shift register and special display effect processing device! It is displayed on the screen of the display device 190 via 18G. At this point code 82 is also transferred into register 30 before and at the same time as register 20. Code 84 is the second code of the letter r], so the identification bit is ATO-1°ATl-1,
Status register 1-0. Status register 2-1. It also becomes the status register 3-0. The status register 2 operates the register 30 to output a data code, and the status decoder @
136 starts Kanji generation.

As shown in Figure 5 ((6), when the first code 85 of the following kanji "bun" (which has two codes) reaches before registers 10 and 30, the first and second codes of the character "chu" Codes 82 and 84 are both stored within register 60.

Since "中" is a kanji character, the state decoding device 136 is the register 60.
Activate to start kanji synthesis, code 82 and 84
is sent to a second output port 132 of the identification means 130;
゛・Character “medium” is in memory 1502 Character spacing generation means 1
Lunch with 65 160. Display device 190 via shift register 170 and special display effect processing device @iao
displayed on the screen. Code 85 is the character “sentence”
Since it is the first code of , the identification bit ATO-1°AT
At l-0, status register 1-.1. Status register 2 = 0
．． and status register 3-1. As shown in Table 1, the status decoding device 136 starts generating alphabetic characters, but since the code unit of the kanji character is twice that of the alphabetic character -, the display time of the kanji character is also doubled, and even at that point, the lower half of the character "chu" is still displayed. There is. Accordingly, state decoder 136 is designed to be inactive at this point.

As shown in FIG. 5(r), when the second code 86 of the character ``sent'' arrives before registers 10 and 30, the first code 85 of ``sent'' arrives before register 20 and at the same time register 30.
transferred within. Since the need 86 is the second code of "sentence", the identification bits are ATO-1, ATI-1, and the status registers are status register 1-O1 status register 2-1. and status register 3-0. Status register 2 operates register 30 to output a data hood. State decoding device 136 begins Kanji generation.

As shown in FIG. 5(g), when the code 87 of the character rBJ arrives before the registers 10 and 30, the first and second codes 8
5 and 86 are stored in register 6o and Kanji generation is started in the manner described above. Since rBJ is an alphabetic character, the identification bits are ATO-0, ATl-0, and the status registers are status registers 1-0. It also becomes status register 2-0.

As shown in FIG. 5(h), when the code 88 of the character rCJ reaches before registers 10 and 30, the code 87 of rBJ is simultaneously transferred before register 20 and into register 30. Since rCJ is an alphabetic character, it is identified. Bit is ATO-0, AT
At l-1, the status registers are status register 1-o, status register 2=-0, and status register 3-1. Status register 2 activates status register 40 and adds code 89 of "00" to register 40. State decoding bag H1
36 starts alphabetic character generation.

As shown in FIG. 5(i), whatever the nature of the code 90 that follows, the rBJ code 87 and the "00" code 89 are stored in the register 50 to display the character rBJ on the screen in the same manner as described above.

Now referring to Figures 6(a) and 6(b), the line RAO
a first programmable logic array (PAL) 167 connected to the erase means 166;
Interval code generator 16 connected to PAL 167 of
A character spacing adding means 165 is shown including 8 and 8. In this embodiment, one line for displaying characters on the screen uses 20 scanning lines, and since the character pattern is only expressed in 16x16 dot matrix mode, each display line The highest two and the lowest two
Books leave blank spaces called "character spacing." Conventional computers directly insert zeros into appropriate locations in display memory that correspond to display locations on the screen. In the present invention, when the character spacing adding means 165 scans the two highest scanning lines and the two lowest scanning lines, the spacing code "0" gives a spacing between characters.
0" is used to automatically send out. Erasing means 16
6 is connected from scanning address port RAO to RA4;
Erase the two scan addresses and output from line SLO to SL4. This requires two adders, e.g. 74LS83IC
This is accomplished by using a chip and connecting as shown in FIG. 6(a). One display line requires 20 scan lines, so the scan address is from RA4 to RA in binary mode.
It is changed from 00H expressed by O to 13H. After the erasure process, the number represented in binary mode from 814 to SLO is changed from -028 to IIH, thus the two minimum numbers, -02 days and -01H1, and the two maximum numbers, 1
When presenting 0H and 11H, l5L4 is in a logic high state.
1" is output.

The first PAL detects the output on line SL4 and
The spacing code generator N168 is activated via PAGE and is programmed to send spacing code roOHJ to perform character spacing processing if the output on line SLJ is a logic high state.

The interval code generation bag N168 is as shown in FIG. 6(b).
It is composed of C74LS125 and 74LS244.

Referring to Figure 7, special display effects including inversion, flashing, underlining and highlighting of keyed characters, as well as vertical and horizontal lines to easily form report formats (programmed An electrical diagram of a special display effects processor 180 is shown that includes two second programmable logic arrays 185 that are connected to each other.

Although the present invention has been described with reference to embodiments considered to be the most practical and preferred at present, the present invention is not limited to the disclosed embodiments, and may be modified and modified within the scope and spirit of the claims. Equivalent structures are also included, and the scope of the claims should be interpreted in the broadest manner to include all these modified or equivalent structures.

[Brief explanation of drawings]

Figure 1 is a flow diagram of the conventional graphic bitmap format kanji generation method using a computer.
FIG. 2 is a flow diagram of another conventional graphic bitmap format kanji generation method, FIG. 3 is a flow diagram of another conventional graphic bitmap format kanji generation method, and FIG. 4 is a digital computer system according to the present invention. An example of a character generation method)〇-
Diagrams 5(a) to 5(1) are system diagrams of identification means according to the invention showing the processing steps for identifying characteristics of keyed characters; FIG. 6(a) is a system diagram of an identification means according to the invention;
Electrical diagram of the erasing means connected to the programmable logic array forming part of the character spacing adding means, No. 6(b)
The figure shows spacing code generation by character spacing adding means according to the present invention.
＠Stomach Electrical System Diagram FIG. 7 is an electrical system diagram of the special display effect processing device according to the present invention. 1.2,3. ...Status register, 10.20°30.
40.50.60...Register, 81...Character rA
The code for J, 82...The first code for the character "medium", 8
3.89...-code of roOJ, 84...second code of character "r", 85...first code of character "bun", 86...second code of character "bun" Code, 87...
Code of letter rBJ, 88... Code of letter rCJ,
10G...Cathode ray tube control device, 105...Scanning line address port, 110...Keyboard input/output device,
120... code buffer, 130... identification means,
131°132...Output port, 135...English character generator, 136...Status decoding device, 140...Multiplexer. 150... Memory, 160... Latch, 165... Character spacing addition means, 166-... Erasing means, 167, 185... PAL, 168...
Interval code generator 170...shift register, 18
G... Special display effect processing device, 190... Display device. Figure 1 Figure 2 Figure 5 (q) Figure 5 (c) Figure 5 Inclined diagram Figure 5 ((6) Figure 5 (f) Figure 5 (9) Figure 5 (h) Figure 5 ( i) Figure 8<a mouth

Claims (12)

[Claims] (1) A keyboard input/output device connected to the keyboard for converting keyed character signals into codes, and a code buffer connected to the keyboard input/output device for receiving and storing the codes. a cathode ray tube control device connected to the code buffer and configured to scan the code buffer and output the code to an output port of the code buffer; A multiplexer that collects the code and the scanning line signal from the scanning address port of the cathode ray tube controller and outputs the address code, and is connected to the multiplexer to receive the address code. A memory that stores a plurality of kanji patterns that outputs a first pattern signal corresponding to a key-input character, a latch that is connected to the memory and receives the first pattern signal and latches it for a predetermined period of time, and is connected to a display device. and a shifter connected to the latch, receiving the first pattern signal, converting it into a series of video signals over the predetermined time, and sending the series of video signals to the display device. A character generation method for digital computer systems consisting of registers. (2) The method according to claim 1, wherein the latch includes means for adding character spacing to the key-input characters. (3) The pattern of the key-input characters is expressed in a 16 x 16 dot matrix mode.
Method described in section. (4) The character spacing adding means is connected to an erasing means connected to the scanning address port of the cathode ray tube controller for erasing two scanning addresses, and to the erasing means for detecting the output of the erasing means. a first programmable logic array; and an interval code generator connected to the first programmable logic array and operable to send an interval code when the output of the erasing means is in a logic high state. The method described in claim 3. (5) Further intervening between the shift register and the display device, inverting, flashing, underlining and highlighting for the keyed characters as well as vertical and horizontal lines to facilitate the formation of report formats. 5. The method according to claim 4, further comprising a special display effect processing device capable of generating at least one of a plurality of special display effects. 6. The system of claim 5, wherein the special display effects processing device includes two programmable logic arrays interconnected and programmed to perform special display effects. (7) having a first and a second output port, the multiplexer being connected to the code buffer via the second output port of the identification means and receiving the code output from the code buffer; If the key-input character is an alphabetic character, the code is output from the first output port, and if the key-input character is a kanji character, the code is output from the second output port. identifying means; connected to the first output port and the latch of the identifying means, respectively, and receiving the code output from the first output port and identifying the second character of the key-input character; 7. The system of claim 6 further comprising an alphanumeric character generator for generating a second pattern signal and sending said second pattern signal to said latch. (8) The identification means includes a set of registers connected to the code buffer, and a state identification device respectively connected to the code buffer and the register set, and the register set reads the code from the code buffer. the state identification device identifies characteristics of the keyed character, actuates the code stored in the register set, and temporarily stores the keyed character; 8. The method according to claim 7, wherein if the key-input character is an alphabetic character, it is output to the first output port, and if the key-input character is a kanji character, it is output to the second output port. (9) The method according to claim 8, wherein the keyboard input/output device converts a kanji character input by key into a code of 2 units, and an alphabetic character input by key into a code of 1 unit. (10) The method according to claim 9, wherein the state identification device is capable of adding a code "00" to the code when the key-input character is an alphabetic character. (11) If the keyed-in character is a Chinese character, the state identification device stores both units of the code in the register set before actuating the output from the second output port of the code. Claim 10 that can wait until
Method described in section. (12) The system according to claim 11, wherein the memory is a mask read-only memory.