CN1026528C

CN1026528C - Character display apparatus

Info

Publication number: CN1026528C
Application number: CN88102079A
Authority: CN
Inventors: 石井孝寿; 小川大树; 大前尚三
Original assignee: ASCII Corp
Current assignee: ASCII Corp
Priority date: 1987-09-02
Filing date: 1988-04-14
Publication date: 1994-11-09
Anticipated expiration: 2003-04-14
Also published as: KR890005606A; KR920001310B1; CN1031772A

Abstract

A character display apparatus comprises at least a memory for storing a character code designating a desirable character and attribute data designating an attribute thereof as one pair of data; a first character generator for pre-storing font data corresponding to English characters and figures; a second character generator for pre-storing font data corresponding to Chinese characters; a judgment portion and a control portion. The judgment portion judges whether one character is designated by one character code or two or more character codes which are read from the memory in accordance with scanning of a display screen.

Description

Character display apparatus

The present invention relates to character display device, particularly relate to a kind of character display device that is very suitable for showing Chinese character.

In recent years, popularizing of personal computer is very rapid, and particularly the specification of the American-European personal computer that uses has become world standard.Therefore, the outstanding software that meets these specifications is developed in a large number, and in addition, because the production in enormous quantities of the personal computer of same specification, the price of personal computer itself is also cheap day by day.

Yet with regard to character display, the personal computer of American-European standard model is as long as can show that English alphabet and numeral are also just enough.And the other direction face, when on the personal computer of this model, carrying out Japanese software, in any case all must have the function of apparent word Chinese character.This situation is although also can show Chinese character and other various characters as long as set graphics mode, so, its shortcoming is, when execution contexts function (character Presentation Function), but produced the slow excessively problem of execution speed, and software does not have compatibility, extremely bothers when transplanting.

In addition, on the aforementioned calculation machine, must be combined into one group to the data of a byte of the code of a byte of expression character (English alphabet and numerical character) and representation attribute and be stored and read.

On the other hand, except that English alphabet and numerical character, for example when showing Chinese character etc., can not satisfy with a byte and to have represented a character code, therefore, this character code or attribute data are stored into the system of storer, become different again with the personal computer of American-European standard specifications, from and produced with the software of American-European standard specifications computing machine can not compatible problem.Simultaneously, for characters such as Chinese characters, also require to enlarge more the attribute function.

First purpose of the present invention is to provide a kind of like this character display device, can use the personal computer of American-European standard specifications, also can under text mode, show characters such as Chinese character, thereby, also just can reach the compatible of the high speed of execution and software and be easy to transplant.

Another object of the present invention is, such character display device is provided, and it can keep the software compatibility with the intercomputer of American-European standard specifications, can increase its attribute function again.

First kind of form of the present invention provides the character display device with following part:

(a). storage area, the character code of each character and the attribute data of representing their attributes are specified in its storage;

(b). the 1st character generator, it stores the font data corresponding to English alphabet and numeral in advance;

(c). the 2nd character generator, it stores the data corresponding to Chinese character pattern in advance;

(d). judge part, it is judged according to the character code that the scanning of indicator screen is read in from above-mentioned storage area is only just to represent the data of a character with a code, still will could be represented the data of a character by the code more than 2;

(e). display control section,

When showing English alphabet and numeral, it is according to the aforementioned result of determination of judging part, read font data from the 1st character generator corresponding to the character code of reading from aforementioned storage area, and this English alphabet of attribute display or the numeral represented with the attribute data that is attached to after this character code;

When showing Chinese character, it is according to the aforementioned result of determination of judging part, read font data from the 2nd character generator, and, show this Chinese character with the attribute that the attribute data that is attached to after this character code is represented corresponding to the character code of reading the aforementioned memory part.

Second kind of form of the present invention provides has following part, and comes the character display device of character display according to the serial dot array data:

(a). storer, it stores the character code of a character of being represented by 1 code or 2 above codes at least;

(b). the character code reading section, it is according to the scanning of indicator screen. from aforementioned memory, read aforementioned character code;

(c). judge part, it judges the character code that is read by aforementioned character code reading part branch, is still will represent the data of a character with two above codes separately with the data of a character of a coded representation;

(d). character generator stores the font data of character with it in advance;

(e). the address generating portion, need result of determination according to aforementioned judgement part, quote the character code that aforementioned character code reading part branch reads in according to needed number of literal of expression, generate the address of the aforementioned character generator that stores the indicated character font data of this character code;

(f). the dot array data generating portion, corresponding to the address that is generated, the above-mentioned font data of reading according to aforementioned character generator shows and uses the serial dot array data to generate;

The third form of the present invention provides the character display device with following part:

(a). storer, that its storage is made up of the code more than 1 or 2, in order to the character code of expression character and the attribute data that matches with above-mentioned each character code;

(b). judge part, it is judged according to the scanning to indicator screen, and the character code of reading from aforementioned memory is the data that only just can represent a character with a code, still will represent the data of a character with 2 above codes.

(c). character generator stores the font data of character with it in advance;

(d). the font data readout device, it quotes the character code that can represent a required number of character according to the aforementioned result of determination of judging part, reads the font data of respective symbols from above-mentioned character generator;

(e). the property control part, it is according to the aforementioned result of determination of judging part, for the character code of representing a character with the code more than 2, its the 2nd pairing attribute data of the character code that code is later, as the extended attribute data, according to these extended attribute data and with the 1st the represented attribute of the attribute data that character code is corresponding, the demonstration of control character.

Fig. 1 is the block scheme of expression one embodiment of the present of invention structure,

Fig. 2 is the block scheme that is applicable to that the integral body of the display system of this embodiment constitutes;

Fig. 3 is the exemplary plot of the attribute data among the same embodiment;

Fig. 4 is the map figure of the character code among this embodiment;

Fig. 5 be the character among this embodiment show and video RAM 3 in character code between graph of a relation;

Fig. 6 and Fig. 7 show the data in the video RAM VRAM and the example of the relation between the shown character thereof respectively.

Below, with reference to drawing, embodiments of the invention are illustrated.

Fig. 1 is the block scheme of expression one embodiment of the present of invention structure, and Fig. 2 is the block scheme of the general structure of the expression display system that is applicable to this embodiment.

Among Fig. 21 is arranged on the CPU(central processing unit in the personal computer of for example American-European standard model), its program is according to the rules moved.Carry out all data between this CPU1 and the cathode ray tube (CRT) controller 2 and transmitting, controlling CRT controller 2.The demonstration of CRT controller 2 control CRT display device 4 is read the VRAM(video RAM according to the scanning of display screen) data in 3, and control demonstration according to the data that this reads.At this moment, VRAM3 is made of first 3a and second 3b as shown in Figure 1, and when text mode, character code is stored among first 3a, is then storing the attribute data that expression is shown character attibute in second.

Herein, so-called attribute data is exactly 8 bit data shown in Fig. 3 A and Fig. 3 B, is divided into basic attribute data and extended attribute data two classes.In each attribute each has function as shown in the figure.That is, in the basic attribute data shown in Fig. 3 A, the 0th to the 2nd, have the function of designated character color, 0,1,2 these 3, blue, the green and red ON/OFF of expression respectively.In addition, the 4th and the 5th, specify to show underscore and left vertical line the 6th anti-elephant the (the inverted character of character color and background color shows) that is used to specify character display, the 7th flicker that then is used to specify character respectively.In addition, in the extended attribute data shown in Fig. 3 B, the 7th is used to specify bold character, the 6th horizontal times of angle that is used to specify character, and the 5th is used to specify vertical times of angle.When vertical times of angle, the 4th last half-word or following half-word that is used to represent to show font represents to show half-word when this position is " 0 ", represents to show half-word down during for " 1 ".When not carrying out vertical times of angle, that is the 5th when being " 0 ", and this 4th invalid.When horizontal times of angle, the 3rd right half-word or left half-word that is used to represent to show font represented to show right half-word when this position is " 0 ", is that " 1 " expression shows left half-word.When non-horizontal times of angle, that is the 6th when being " 0 ", and the 3rd invalid.The the 2nd～the 0th reservation is not used.

In addition, every function of above-mentioned each attribute data, just an example can come they are carried out suitable different definition according to various ways.

In addition, in the present embodiment, character code adopts so-called displacement JIS character code.Displacement JIS moves to the Chinese character district in the JISC6226 standard in this standard in the untapped district, and its purpose is to make it and the overlapping mutually of distribution locations of common English alphabet and numeral.Fig. 4 shows the situation of its code image.In this figure, the zone that is marked with symbol SJIS-I and SJIS-II is the Chinese character subregion.Chinese character in this zone is specified by the character code of two bytes.In addition, the character that English alphabet and numeral (ANK) character, the foreign letter of half-angle and set with Japanese alphabet half-angles such as (KANA) show by the code of 1 byte, that is is specified by OOH～7FH and AOH～DFH.

Secondly, the relation between data among the VRAM3 and the character that is shown, as shown in Figure 5.As shown in the figure, character code is that the Chinese character of 2 bytes is that full-shape shows, character code is that the English alphabet and the numeral of 1 byte then shows for half-angle.Thereby, the shared zone of character code of this character big or small corresponding among the shared area of certain character and the VRAM3 on display screen., show at half-angle under the situation of English alphabet and numeral in addition,, join for a pair of with the attribute data of a byte for the character code of a byte, in the situation of full-shape demonstration Chinese character, the character code of 2 bytes, the attribute data with 2 bytes matches respectively.And the attribute data with the 2nd Chinese character code pairing then becomes extended attribute data (referring to Fig. 3 B).

In addition, in the regional image of VRAM3 shown in Figure 5, character code and attribute data are alternate configurations, but in fact they are stored into the 1st 3a and the 2nd 3b respectively accordingly, and its address is decided to be same address.

In addition, as shown in Figure 1, on the common bus 15 that each address bus of the 1st 3a and the 2nd 3b and data bus all are connected to 8.This common bus 15 is used by timesharing, character code, attribute data, address date etc., and the timing that is distributed by CRT controller 2 respectively outputs on the common bus 15.In this case, address date is made of row address data and column address data, and they are also exported by timesharing.

Each data in the VRAM3 as mentioned above, and after CRT controller 2 reads character code from VRAM3, are read the font data of corresponding this character code again from character generator shown in Figure 25.Then, the font data of being read is converted to serial data, gives CRT display device 4 then.And,, carry out control, the flicker control of Show Color or laterally double/vertically double to show etc. (following detailed description) at this moment also according to the attribute data that is attached to after this character code.

Secondly, the 10th, Chinese display is made up of control section 10a and character generator 10b.Formation with regard to Chinese display 10 is illustrated below.

Code reading section 20 shown in Fig. 1, its input end (8) is by on common bus 15, and CRT controller 2 in the timing of reading character code and attribute data, reads these data.At this moment, code reading part 20 comes recognition property data and character code according to the permission output signal (diagram slightly) of the 1st 3a and the 2nd 3b of 2 outputs of CRT controller.In addition, the data of attribute data and character code are totally 2 bytes, are stored in the trigger (D flip-flop) of appointment.The 21st, have the attribute data latch of 2 byte capacities, the attribute data in the code reading section 20 according to the order of previous reading of data, is supplied with latch in turn.The 22nd, the character code latch, it is made of the 1st storer 22a that respectively has 1 byte capacity and the 2nd storer 22b.The data of the 2nd storer 22b are supplied with by the sequencing that reads previously successively by the character code in the reading section 20, and the character code of giving the 2nd storer 22b also will be given them among the 1st storer 22a in turn.The 23rd, full-shape/half-angle detects part, and it is according to the data of high 3 positions of the 1st storer 22a, and the character code that detects in this storer is the code of double byte character or the code of half-angle character.For double byte character, as previously mentioned, it is specified by the character code of 2 bytes, its 1st byte, and as can be seen from Figure 4, it can be 8,9, E, therefore can to identify it be a double byte character code by high 3 of the 1st storer 22a.This full-shape/half-angle detects part 23, by constituting of logic gate, when character code is 8,9, during among the E certain, just export a full-shape detecting signal ZEN.

Secondly, the 24th, character generator address generating portion, it produces the address of character generator 10b according to character code.Character generator 10b in this embodiment, the involatile random access memory of being used by a plurality of ROM (read-only memory) (ROM) and the outer Chinese character of generation (RAM) is constituted, character generator address generating portion 24 produces the address signal corresponding to the chip selection signal of code image (referring to Fig. 4) according to character code.Under this situation, character generator address generating portion 24 is when full-shape/half-angle detects part 23 a full-shape detecting signal ZEN is provided, then the character code according to 2 bytes in the 1st storer 22a and the 2nd storer 22b generates the address, and when full-shape detecting signal ZEN is not provided, then generate the address according to the character code in the 1st storer 22a.When character generator 10b is read out in the font data of half-angle character, just export the font data of horizontal 8 points of a character, and when having read the font data of double byte character, the font data of horizontal 16 points of character, be divided into twice output, export the font data of 8 points at every turn.The output function of the font data of this character generator 10b, according to the control signal that attribute processing section 30 is provided, its operation is just different, and corresponding with the content of attribute data, its details is narrated in the back.

Secondly, 26 is parallel/serial convertors, and it is according to getting clock DCK ready or getting the two divided-frequency of clock DCK ready, and 8 font datas being supplied with from character generator 10b are converted to serial data, and it is exported as dot array data.The switching of serial data slewing rate is at this moment controlled by the control signal that attribute processing section 30 is provided.And parallel/serial convertor 26 is changed the data by input end A～H input and export by its sequencing.

27 is XOR gate, it allows signal generation to divide 43 output signal to carry out XOR to the output signal of parallel/serial convertor 26 and cursor, 43 cursor do not take place allow signal CEN(" 1 " signal when cursor allows signal generation to divide) time, then parallel/serial convertor 26 becomes breakthrough status for the dot array data of being exported.The 28th, the colour code generating portion, for each dot array data that provides through XOR gate 27, it fixed colour code read from color palette 31, output to CRT display device 4.So-called fixed colour code means by the specified colour code in attribute processing section 30.Just, everybody function of the basic attribute data (referring to Fig. 3 A) that attribute processing section 30 will be provided according to attribute data latch 21 is selected colour code, and is provided control signal to the colour code generating portion.For example, basic attribute data is specified when the foreground is colored to be " red ", then for the pairing dot matrix of character part of this character, sends the order of reading red colour code.In addition, other processing command corresponding to basic attribute data is also sent to colour code generating portion 28 in attribute processing section 30.Just, corresponding to whether needing flicker, counter processing such as showing underscore, the informing color code generating unit 28 of resembling.And then, attribute processing section 30 is when being provided with sign SSA, the attribute data of the 2nd byte in the attribute data latch 21, as the extended attribute data, carry out the every pairing processing of extended attribute data, and when sign SSA is not set up, then the attribute data of the 2nd byte is ignored.About the processing of these extended attribute data, give detailed description later on again.

Secondly, the 40th, the address reading section, it reads the address date of being sent from the common bus 15.On common bus 15, address date is by row address and column address, adopt time-sharing format to export, the gating signal that address reading section 40 is then exported according to CRT controller 2 (diagram slightly) is discerned them, and they are stored as one group of data.Row address data and the column address data stored in address reading section 40 are given rating unit 41, in comparer, judge whether they are consistent with the data in the register 42.When rating unit 41 detects consistent state, just consistent detecting signal is exported to cursor and allowed signal generation to divide 43.In this situation, in the register 42 in advance by CPUI write should display highlighting the address.Cursor allows signal generation to divide 43 when receiving consistent detecting signal, just cursor is allowed signal CEN(" 1 " signal) output to another input end of XOR gate 27.In this situation, when having exported a full-shape from full-shape/half-angle detecting element 23 and detected signal ZEN, then in the time during showing corresponding to double byte character, export a cursor and allow signal CEN, and when not importing full-shape detecting signal ZEN, showing in the time of time corresponding to the half-angle character, exporting a cursor and allow signal.XOR gate 27 imported a cursor allow signal CEN during, just become a phase inverter for parallel/serial convertor 26.Therefore, cursor just resembles character as character color and background colour counter and is shown.

Below, just the action of the embodiment that is made of above-mentioned part is illustrated.

At first, if the American-European program of using of employed program and needn't show Chinese character the time, then Chinese display 10 just is failure to actuate among the CPUI, the demonstration on CRT display device 4 is controlled by CRT controller 2.On the other hand, if employed program is a day pragmatic in CPUI, in the time of must showing Chinese character, though CRT controller 2 also carries out access to VRAM3 under the control of CPUI, it does not go to control CRT display device 4.And replaced C RT controller 2 reads the information of 2 accesses of reason CRT controller by Chinese display 10, that is reads character code, attribute data and address date respectively, and controls CRT display device 4 according to these data.Below be illustrated with regard to the action of this situation.

At first, CRT controller 2 carries out access according to the order of display screen scanning to VRAM3.Then, code reading section 20 is read in character code and the attribute data by 2 accesses of CRT controller.The character code that this code reading section 20 is read in is sent in the character code latch 21, and then, detect part 23 by full-shape/half-angle and judge that this character is double byte character or half-angle character.When it is double byte character, just export a full-shape detecting signal ZEN, the CG(character generator) address generating portion 24 is then according to the 1st storer 22a address that the character code that amounts to 2 bytes among the 2nd storer 22b produces character generator 10b that neutralizes.In addition, under the situation of half-angle character, owing to do not export full-shape detecting signal ZEN, part 24 generates character code generator 10b according to the character code among the 1st storer 22a address takes place in the CG address.Secondly, character generator 10b comes output data by following situation: when the font to double byte character carries out access, then the data that character laterally is equivalent to 16 points are equivalent to 8 points at twice at every turn and export, and in the situation of the font of access half-angle character, the data that are equivalent to 8 points that then output character is horizontal.In addition, parallel/serial capable converter 26 converts the data by character generator 10b output to serial data in turn, by XOR gate 27, offers colour code generating portion 28.Colour code generating portion 28 generates its colour code to each dot array data that is received, and outputs in the CRT display device 4 according to the control signal of attribute processing section 30.In view of the above, by the specified character of character code,, on the display screen of CRT display device 4, be revealed according to the specified color of attribute data and other attribute (flicker, counter resemble etc.).

Herein, sign SSA is in the state that is set, and then, in the situation of reading the Chinese character code, also to increase following processing in the above-mentioned processing.

At first, attribute processing section 30 is identified as the extended attribute data to the attribute data of the 2nd byte, carries out the processing corresponding to everybody function shown in Fig. 3 B.

(1). when the 7th (boldface letter specific bit) of extended attribute data is the situations of " 1 ".

In this situation, the control signal that parallel/serial capable converter 26 is sent according to attribute processing section 30, produce a handle and get the inhibit signal that clock DCK postpones a clock ready, and the serial data that makes by this delayed clock with get the serial data that clock makes ready and do the logical OR computing by original, and from the serial data of output terminal Q output by above-mentioned logical OR computing gained.So,, font along continuous straight runs (direction of scanning) produce to be repeated by the serial data of logical OR gained, thus the demonstration overstriking of along continuous straight runs a point.

(2). when the 6th of the extended attribute data (horizontal times angle specific bit) is the situation of " 1 ".

In this situation, be that appointment Chinese character along continuous straight runs is enlarged 1 times of processing that shows, corresponding to the 3rd different contents, the font display part is also inequality, and is specific as follows:

At first, the 3rd is the situation of " 1 ", and 8 the font data that is expanded the character left side can be read by character generator 10b, then, in parallel/serial capable converter 26,, carry out parallel/serial row conversion by 1/2 clock of getting clock DCK ready received 8 font datas.By the data of the parallel/serial row conversion of 1/2 clock of getting clock DCK ready gained,, offer colour code generating portion 28 in view of the above by XOR gate 27.On the other hand, on CRT display device 4, show according to the common clock DCK that gets ready, its result, the left-half of font, along continuous straight runs has enlarged 1 times, shows (referring to Fig. 6) with the size of double byte character.

In addition, when the 3rd of extended attribute data is the situation of " 0 ", 8 font datas of this character right-hand part are read out from character generator 10b, and in parallel/serial capable converter 26,8 font datas that receive, carry out parallel/serial row conversion with 1/2 clock of getting clock DCK ready.In view of the above, make the data of parallel/serial conversion gained,, offer colour code generating portion 28 by XOR gate 27 with 1/2 clock of getting clock DCK ready.Thereby also the same with above-mentioned situation, the right half part along continuous straight runs of font is expanded as twice, is revealed (referring to Fig. 6) with the size of double byte character.

Thereby, for the character code of same Chinese character, they are carried out continuously that an above-mentioned left side half shows and right half show, just the font along continuous straight runs of this Chinese character can be expanded and be twice, show with the size of 2 double byte characters, finished a times angle demonstration., carry out times angle when showing herein, providing sample data among the VRAM3 and the relation between its character display among Fig. 6.Character code C shown in Fig. 6 ₁A, C ₁B is the character code of specifying a Chinese character with two codes, follows in character code C ₁Attribute data after a is basic attribute data BATR, follows at character code C ₁Attribute data after the b is extended attribute data EATR.In this situation, the 6th, the 3rd of first extended attribute data EATR all is " 1 ", and the 6th of second extended attribute EATR is " 1 ", and the 3rd is " 0 ".In addition, as seen from the figure, the horizontal times shared area of angle character on the display screen, corresponding with the data of this character of expression shared area size in storer.

(3). when the 5th of the extended attribute data (vertical times angle specific bit) is the situation of " 1 ".

This situation is that the Chinese character with appointment vertically expands and is twice the processing that shows, corresponding to the 4th different content, the display part of font is also different, specific as follows:

At first, when being " 1 " for the 4th, the font data of this character first half is read out from character generator 10b.But, for twice scanning of display screen, the same address of character generator 10b is interviewed to twice.Thereby, on adjacent 2 row, from character generator 10b output same word graphic data.So, the extended in vertical direction one times of (see figure 7) of the font of the first half.

When the 4th of extended attribute data is " 0 ", be this font Lower Half except that what read by character generator 10b, all the other operations are same as described above.

Thereby, in the same lateral attitude of adjacent two row (K and K+1),, just font can be expanded in vertical direction and be twice by carrying out the demonstration of the aforementioned first half and Lower Half in turn, finish vertical times angle and show.In Fig. 7, sample data and its shown intercharacter relation among the VRAM3 when indulging times angle shows have been represented herein.In the case, expression first half data presented and expression Lower Half data presented are stored in respectively in the zone corresponding with the same lateral attitude of adjacent two row (K and K+1).And the 6th, the 4th of first extended attribute data EATR is " 1 ", and the 6th of second extended attribute data EATR is " 1 ", and the 4th is " 0 ".Under the situation about showing at this vertical times of angle, display screen on times angle character area occupied is also with the data of this character of expression shared zone big or small corresponding in storer.

(4). when being " 1 " for the 6th, the 5th, then carry out the action of aforementioned (2), (3) simultaneously.In other words, carry out horizontal times angle and vertical times angle simultaneously, thereby realize that 4 times of angles show.These 4 times of angles are shown, by as can be known aforementioned, character area occupied on the display screen, also corresponding with data shared area size in storer of this character of expression.Its result, in this embodiment, the size of character is corresponding with the data volume of this character of expression on the display screen, and the memory map that this and American-European standard are used becomes same system.

More than be the various processing of being carried out according to the extended attribute data.

Below, be illustrated with regard to the cursor display process.At first, address reading section 40 reads the address date of being exported by CRT controller 2.The data that this is read compare with the data in the register 42 in comparer 41, and when comparative result was consistent, cursor allowed signal generation to divide 43 to produce a cursor permission signal CEN.Its result, for locational character pattern data that should display highlighting, XOR gate 27 has played the effect of a phase inverter, thus cursor is used as one and instead resembles the character of demonstration and be shown.

In addition, in the above-described embodiments, as long as add Chinese display 10 on the personal computer of American-European standard criterion, just can show Chinese character, this is one of its advantage.And, because it both can intactly utilize VRAM3 on constituting, also can utilize the access of CRT controller 2 untouchedly, therefore, need not change hardware.

In addition, in an embodiment, taked the constituted mode of additional control section 10a in CRT controller 2, but also can combine them at the very start, constituted a circuit with above-mentioned each function.

And then though the foregoing description is the embodiment that shows about the Chinese character in the Japanese/assumed name, the present invention also is applicable to the language beyond the Japanese.That is to say, be applicable to that those must use character code more than 2 to represent the language of a character, for example also applicable to the demonstration of Chinese or Korean etc., also can further enlarge the function of attribute.

And, in the above-described embodiments, as long as clear flag SSA just no longer discerns extended attribute.Therefore, when moving, as long as clear flag SSA just can not do the extended attribute data to the basic attribute data misidentification only by English alphabet and the digital software that constitutes.So, in the situation of having only English alphabet and digital code, perhaps in kanji code and extended attribute data situation mixed in together, as long as rewrite the content of sign SSA, just can switch to another kind of state from a kind of state very simply, thereby obtain very high interchangeability, this also is its advantage.

As previously mentioned, according to the present invention, even, also can use text mode to show characters such as Chinese character in the occasion of the personal computer that uses American-European standard specifications, according to these, just can realize the compatible of the high speed of travelling speed and software and be easy to transplant.And, can also enlarge the attribute function of above-mentioned personal computer, thereby can show various characters.

Claims

1, a kind of character display device that shows various characters comprises memory storage, character generator, and its character display device is characterised in that:

Described memory device stores is specified the character code of each character and is represented the attribute data of its attribute;

Described character generator comprises first character generator and second character generator, and wherein said first character generator is used in advance the font data corresponding to English alphabet and numeral being stored; And described second character generator is used in advance the font data corresponding to Chinese character being stored; And

Described character display device also comprises:

Judge part, it judges that the character code of reading from above-mentioned storer by the scanning of display screen is to represent the data of character separately, still must be by the data that could represent character more than 2;

Display control section, when showing English alphabet and numeral, according to the aforementioned basic result of determination of judging part, font data corresponding to the character code of from aforementioned memory, reading, read from first character generator, and the attribute of representing with the attribute data that is additional to after this character code shows this English alphabet and numeral;

When showing Chinese character, according to the aforementioned result of determination of judging part, font data corresponding to the character code of reading from aforementioned memory is read from second character generator, and the attribute of representing with the attribute data that is additional to after this character code shows this Chinese character.

2, a kind of character display device that shows various characters comprises storer, character generator, and comes character display according to the serial dot array data, it is characterized in that,

Described storer is stored the character code by a character of the coded representation more than 1 or 2 at least;

Described character generator stores the font data of character in advance; Described character display device also comprises:

The character code reading section, it reads aforementioned character code according to the scanning sequency of display screen from aforementioned memory;

Judge part, it judges that the character code that is read by aforementioned character code reading section is to represent the data of a character separately, still must be by the data that could represent a character more than 2;

The address generating portion, it is according to the aforementioned result of determination of judging part, quote the character code that aforementioned character reading part branch reads in according to needed number of character of expression, to generate the address of aforementioned character generator, the represented font data of this character code is being stored in this address;

The dot array data generating portion corresponding to the address that is generated, according to the aforementioned font data of being read in the aforementioned character generator, generates demonstration serial dot array data.

3, according to 2 character display devices of being put down in writing of claim the, it is characterized in that, described display controller is according to the scanning sequency of display screen, go out aforementioned character code from aforementioned memory read, and its aforementioned character code reading section, obtain synchronously with the access of display controller, and read the character code of reading in by aforementioned display controller.

4, a kind of character display device that shows various characters comprises storer, character generator, it is characterized in that,

Described memory stores is represented the character code of a character with the code more than 1 or 2, and the attribute data that matches with aforementioned each character code;

Judge part, according to the scanning sequency of display screen, go out character code from aforementioned memory read after, partly judge that these character codes are to represent the data of a character separately by this judgements, still must be by the data that could represent a character more than 2;

The font data readout device, it is according to the aforementioned result of determination of judging part, the character code of the required number of representing a character is quoted, and read the font data of this character from aforementioned character generator;

The property control part, it is according to the aforementioned result of determination of judging part, discerned as the extended attribute data for attribute data with the 2nd later character code pairing of the character code of a character of 2 above coded representation, and according to these extended attribute data and with the represented attribute of attribute data of the 1st character code pairing, carry out character and show control.

According to 4 character display devices of being put down in writing of claim the, it is characterized in that 5, its aforesaid property control part possesses pair effective/invalid device for switching of carrying out of extended attribute data identification action is arranged.

According to 2 of claims the, the 3rd or the 4th character display device of being put down in writing, it is characterized in that 6, its aforesaid character code is 1 byte character code of expression half-angle character display, or 2 syllabified codes of expression full-shape character display.

7, according to 6 character display devices of being put down in writing of claim the, it is characterized in that, wherein English alphabet and numeral are set as aforementioned half-angle character display, and Chinese character is set as aforementioned full-shape character display.