JPS59104691A - Character display - 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 The present invention relates to a character display that displays character information.

In recent years, document creation/communication terminal devices having document creation/editing functions and communication functions, such as communication word processors and document creation terminal devices capable of international communication, have been developed.

In order to improve versatility and operability, character displays used in such document creation communication terminal devices display not only characters such as alphabets and numbers, but also characters such as IJLJ, etc. It is desirable to be able to display special characters such as distinctive phonetic characters and ``尼''.

However, conventional character displays are unable to display distinctive phonetic characters and special characters as they are. and the character string rA, △+H of the characters "△, HJ" indicating that this rAJ is a distinctive phonetic note, and the character rJJ indicating the distinguishing note "0".
Only pseudo-displays such as "+J" were possible.

The present invention has been made in view of the above-mentioned points, and an object of the present invention is to enable characters with distinctive pronunciation and special characters to be displayed as they are in a character display.

No, the character display according to this invention,
It is determined whether or not character information conversion command information that instructs the conversion of the character information into predetermined character information is added to the input character information, and the input character information is converted in advance based on the determination result. By converting to specified character information and displaying this converted character information, by inputting the character information conversion command 1h information, the character information can be converted to characters with distinguishing whole notes or special characters. It is designed to be displayed.

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a block diagram showing an example of a character display embodying the present invention.

In the figure, this character display is a CRT
Control the display 1 and this CRT display 1
It consists of a CRT control section 2 that performs t.

The CRT display 1 includes a CRT 3 and a CRT control section 2.
A video amplifier circuit 4 amplifies the video signal VD from the CRT 6 and outputs it to the grid of the CRT 6, and a video amplifier circuit 4 which inputs the horizontal synchronization signal H8 and the vertical synchronization signal VS from the CRT control section 2 to the CRT.
The horizontal deflection circuit 5 and the vertical deflection circuit 6 control the horizontal deflection and vertical deflection of 3.

The horizontal deflection circuit 5 includes a drive circuit 7. which receives a horizontal synchronization signal H8. Trance 8. It consists of an output circuit 9 that outputs a horizontal deflection control signal, a high voltage circuit 10, and the like.

The vertical deflection circuit 6 includes a vertical oscillation circuit 11 to which a vertical synchronizing signal ■s is input. It consists of a drive circuit 12, an output circuit 13 that outputs a vertical deflection control signal, and the like.

The CRT control unit 2 includes a CPU 20 . ROM21.

RAM22. Serial ■1026. Parallel I/.

24. Refresh memory (hereinafter referred to as rV-RAMj) 25 and 26. Character generators 27 and 2
8. CRT controller 29. It is composed of a video control circuit 60 and the like.

The ROM 21 stores a CRT control program for executing display control, and the RAM 22 stores data such as received (input) character information and is used as a working area for program execution.

The Norial l1023 transfers received data RD such as character information via the driver 61, and the Parallel l1024 transfers switching system data of the multiplexers 32 and 33.

V-RAM25 and 26f-j, v-■tAM for basic characters (characters other than distinguishing notes) and distinguishing notes, respectively
and the CPU 2 via the multiplexers 32 and 66
0 or accessed by the CRT controller 29;
Also bidirectional bus drivers, +t', j4; 34 and 6
Reading and writing of character data is performed through 5.

The character generators 27 and 28 each generate one basic character (characters other than the distinguishing note) and one distinctive pronunciation character.
210-7/E and A/1-F in Figure 6, each consisting of 16 dots vertically and 10 dots horizontally, as shown in Figure 2.
/E has the characters shown, V-RAM, 25 and 26
The character data input through the latch circuits 66 and 67 is converted into dot data of basic characters and distinguishing notes.

The CRT controller 29 is a clock generator 68
The horizontal synchronization signal H8 and vertical synchronization signal VS for display on the cRT6 are output to the horizontal deflection circuit 22 and vertical deflection circuit 26, respectively, and the video timing signal VT and cursor signal KS are input to the video It is output to the control circuit 60.

The video control circuit 60 converts the parallel data from the character generators 27 and 28 into serial data using the pitch registers 39 and 40, and then inputs the dot data of the basic characters and the differentiated note, which are synthesized using the OR circuit 41. CRT controller 29 outputs video signal VD to video amplifier circuit 4 based on video timing signal VT and cursor signal KS.

The CR'l" control unit 2 includes a determining means for determining whether or not character information conversion command information is added to input character information, and a determining means for determining whether or not character information conversion command information is added to input character information, and a determining means for determining whether or not character information conversion command information is added to input character information, and a determination means for determining whether or not character information conversion command information is added to input character information, and a determination means for determining whether or not character information conversion command information is added to input character information. The character information converting means for converting information into predetermined display character information is constituted by a C11T control program, and its details will be described later.

Still, in this embodiment, in order to display the diacritical characters, two V-JKAMs are used, one for the basic character and one for the diacritic.
25.26 and character generator 27.28 are provided to synthesize the data of both, but one V-1%A
It can also be composed of M and a character generator.

Next, the CRT display 1 is controlled by the CRT control unit 2.
This section provides an overview of display control.

First, when displaying a character other than a distinctive phonetic typed character, the CPU 20 uses CBr based on display character information.
Write data to the address of the V-RAM 25 corresponding to the part to be displayed on the screen of 3, and when displaying distinctive pronunciation and typed characters, display the screen of CBr4 based on the displayed character information by CI) U 20. Write data to the addresses of V-RAM 25 and V-RAM 26 corresponding to the desired portion.

Then, the CRT controller 29 synchronizes with the video timing signal VT for display on the CBr4, and the V-R
Access AM25 and 26.

As a result, the data of basic characters and distinguishing notes outputted from the V-RAMs 25 and 26 are converted into dot data of basic characters and distinguishing notes by the character generators 27 and 28, and this converted data is transferred to the shift register 39. and 40 into serial data, which is then synthesized by an OR circuit 41 and input to the video control circuit 30.

Then, the video control circuit 30
Video signal VD according to the data stored in 5 and 26
is generated to display character information on the CRT B.

Next, the specifications of the CRT control program stored in the ROM 21 of the CRT control section 2 will be explained.

The CRT control program is from +11 to (5) below.
) is satisfied.

4 shows a block diagram of the CRT control program, FIG. 5 shows the flow of its display routine, and FIG. 6 shows the flow of the display information conversion routine of FIG.

(1) Display character information conversion function Referring to Figures 6, 5, and 6, (i) JI
Receives (inputs) display character information in a 7-bit or 8-bit code compliant with S.

The character structure in this embodiment is a start-stop type and consists of 1 start bit, 8 data bits, and 2 stop bits, a total of 11 bits.

(11) For characters not shown in 210 to 7/E in FIG. 3, code conversion (conversion of character information) is not performed because they are input as code data shown in the same figure.

(iii) Among the characters shown in A/1 to F/F in Figure 6, characters other than the distinguishing note among the characters C10 to C/F (these characters are "special characters") teeth,
[5EH+50H+special character code (however, b7
=o) Data is input as a 3-byte code of J.

Therefore, in order to display special characters, the received data is
EH + 50H + special character code (bz = 0) When accompanied by a code string of j, the received data is r5E shown in Figure 6.
The code is converted to a code string of "H+50H+special character code".

This will be explained specifically using the special character "β" as an example. When displaying this special character 1, change the code of the character "Ku" shown in FIG. 3 to b7-0, so that the code becomes r61Hj, so [EH-+-s.

Data of a code string of H+61HJ is input, and the original display corresponding to this received data is [Δ, P, aj.

However, as mentioned above, this received data is r5 EH+
Since the code is converted into a code string of 50H+EIHj, the display corresponding to this converted data is [△+P+'J
become.

(IV) C/1 to C/8 in Figure 3, C/A,
C/B.

The diacritic diacritic characters with the diacritic whole notes C/D to C/F are shown in Figure 6 [Basic character code - 1-5EH
+48H diacritical mark (b7=0) 4 of l
Input as bytecode data.

Therefore, in order to display distinctively pronounced stamped characters, if the received data is accompanied by a code string of 15EH+48HJ in the basic character code, the received data is shown in FIG. 3 [Basic character code.

Distinguished starting note code +2. DH+2 DH+ Convert code to 2DI month code string.

This will be explained specifically using a diacritic whole note (= 1 character j) as an example. When displaying this diacritic phonetic character ``enter'', use the diacritic whole note ``0'' shown in Figure 6. ” with the sign b
By setting it to 7-0, the code of "0" becomes [4AHj, so the data of the code string r41 H+S EH+48H+4AHj is input, and the original display corresponding to this received data is [A, △, I-I, J, J.

However, as mentioned above, this received data is
, CAH+2DH+2 DH+2DHJ, the display corresponding to this converted data is r
x, -.

-1-".

Here, of the display routine shown in FIG. 5 and the display information conversion routine shown in FIG. 6, the portion relating to the conversion of displayed character information will be explained.

First, in this character display, V-R
Data writing to AM 25 and 26 is performed during the blanking time of the CRT, that is, an interrupt is sent to the CPU 20 by the vertical synchronizing signal V-8YNC shown in FIG. 4 (vertical synchronizing signal vs from the CRT controller 29 in FIG. Then, the display routine shown in FIG. 5 is entered.

In this display routine, vertical synchronization signal V-8YN
After performing the predetermined interrupt processing by C, FiFO2
Check whether there is data. This FiFO2
is a data buffer that stores data to be written to the V-RAM 25 and 26.

Note that Table 1 shows a list of data types.

If there is no data in the FiFO 2, a display information conversion routine shown in FIG. 6 is entered to display distinctively pronounced characters, special characters, and underlines to be described later. In other words, if the display processing speed is faster than the data transferred from the host side, all the time is spent converting the display information.

On the other hand, if there is data in F i F o2, that is, if the display processing speed is slower, display processing and display information conversion processing are performed alternately. This number of times can be set freely; for example, the display information conversion process is performed once for each display process performed twice.

Next, the display information conversion routine will be explained except for the part related to underlining.

In this display information conversion routine, since the underline flag (U-FLAG) is reset, V
- Data in RAM 25 is transferred to bidirectional bus driver 64.
(V-RAM 250
-do).

Then, check whether it is a “△” code, and check if it is a “△” code.
” code, then it is checked whether it is an rHJ code. r Since the HJ code is a character with a distinguishing whole note, load the next address, read the code of the distinguishable note, perform the specified code conversion as described above, and read the data of the distinguishable note. is written into the V-RAM 26, and rsPjj- is written into the V-RAM 25.

Writing rSPJ=7-code to f V-RAM 25 is the V-RAM 25 (7) data and V-RAIVI.
This is to prevent the character area from becoming solid black when 26 pieces of data are combined.

Also, if it is not an "H" code, it is checked whether it is an rPJ code. Since the rPJ code is a special character, a predetermined code conversion is performed as described above, and the special character data is written into the V-RAM 25.

Then, when the display information conversion process as described above is executed all the times that can be executed within a predetermined blanking time of the CRT, the interrupt is passed.

In this way, first, it is determined whether [△, HJ or [△, PJ] is added to the input character information, which is character information conversion command information that instructs conversion of this character information into predetermined display character information. Determine whether

Then, when the character information conversion command information is added, the input character information is converted into predetermined display character information, such as characters with distinguishing whole notes or special characters.

Accordingly, when displaying characters other than special characters and distinctively pronounced characters, the character information of the 8-bit code shown in FIG. The text information entered will be displayed as is.

When displaying a special character, the character information of the character corresponding to the code b7-0 shown in Figure 6 of the special character to be displayed must be converted into predetermined display character information. Character information that is the command information for character information conversion command
By adding and inputting ``Δ, P'', the input character information is converted to special character information, and the special characters are displayed as they are.

Furthermore, when displaying a character with a distinguishing whole note, character information is added to the character information of the basic character of the character to be displayed and the character information of the character corresponding to the symbol b7-0 shown in Figure 3 of the character to be displayed. By inputting the character information [△, HJ which is conversion command information], the input character information is converted to the distinguishing pronunciation notation character information, and the characters with the distinguishing whole note are displayed as they are.

In addition, as in this embodiment, the number of bytes of the received code and the number of displayed characters are made the same, that is, for special characters, the number of displayed characters is 3 for 3 bytes of the received code. By setting the number of displayed characters to 4 characters for each 4-byte received code, when editing a document on the character display, the number of characters managed by the host side matches the number of characters displayed on the character display, and the document No inconvenience occurs when editing is removed.

Furthermore, as in this embodiment, by converting the display character information by referring to the data on the V-RAM instead of the received (input) data, the display position can be displayed from the host side. Correct conversion is possible even if the order of the received data is not transferred, that is, even if the transferred data specifies a display position randomly.

(2) Normal mode function Referring to FIGS. 3 to 5, (1) In the normal mode, the received data is always written in the RAM 22 on standby.

(11) Display character information (character code) that can display received data or control information (010 to 1/F in Figure 3)
control code), the received data is displayed at the cursor position immediately before reception,
Move the cursor forward one column.

(iii) If the received data is a displayable control code, perform the processing requested by the data. This will be discussed later.

Gv) If the received data is a code corresponding to the blank area in Figure 3 or the DEL code of 7/F in Figure 6, the data is ignored without performing any internal processing, and the data is keep the mode as is.

(V) When a character or a control code is received and the corresponding processing is completed, the state returns to the state of waiting for data writing to the RAM 22.

(3) Control code function Among the control codes shown in 010 to 1/F in Figure 6, when data of a control code having a control function is received, the following control codes (1) to (vil) are required. Do the following.

(i) When a screen clear FF (OCR) code is received, the entire screen is cleared. At this time, the cursor is set in the first column of the first line at the upper left corner of the screen.

(11) When receiving the return change action CR (ODH) code, set the cursor to the top of the current line.

When the LF(OA)I) code is received, the cursor is moved to the next line at the same column position.

In this return/return operation, erasure from the cursor position to the line end is not performed.

If the cursor is on the last line when this LF code is received, the line is scrolled up and the cursor is set at the same column position on the same last line.

(iii) When the tab operation HT (09H) code is received, the cursor moves 8 columns from the left to 8°16.24,32.
．． Set to 40.4B, 56, 64°72.80 force ram position.

Gv) Backspace BS (08H) When the code is received, move the cursor one column to the left and erase the characters displayed on the left. If the power input is in the first column, the cursor is not moved and the received BS code is ignored.

(v) Underline (see Figure 6) C8I Underline start of sequence function: △[(5EI(
, 5BH) and start of underline: △) (5
E) i, 5DH) When the code is received, “△[
] and “△〕”. That is, in this case as well, character information is converted into predetermined display character information.

To describe this specifically, the reception code is [△[ABCD
△]”, it is displayed as [△[to ABCD]].

(VD ESC sequence mode When the ESC (IBH) code is received, the ESC sequence mode described in (4) below is entered.

(4+ ESC sequence mode function When receiving an ESC code, set it to ESC sequence mode and display the next received display character code (character code)
is used as the ESC sequence function code, and the characters of that character code are not displayed.

(i) Cursor up control ESC (I B
When a sequence of I() + A (41H) codes is received, leave the cursor in the same column position.
Move it to the next line up.

If this sequence is received while the cursor is on the first line, the sequence received without moving the cursor is ignored.

(ii) Cursor down control ESC (I
When a sequence of BH)+B (42H) codes is received, the cursor is moved one line below while remaining in the same column position.

If this sequence is received while the cursor is on the last line, it scrolls up one line and simultaneously sets the cursor to the same column position on the same last line.

(iii) When the cursor forward ESC (IBH) + C (43H,) code sequence is received, move the cursor one column position to the right.

If this sequence is received while the cursor is in the end column of a line, it is moved to the first column of the next line.

If this sequence is received while the cursor is at the end column of the last line, (1) the line is scrolled up and the cursor is set to the first column of the same last line.

(IV) Cursor Back Forward ESC (IBH
)+D (44H) code, the cursor is moved one column to the left. If the input key moves to the first column, the cursor is not moved any further and subsequent received codes are ignored.

(■) Cursor home control ESC (IBH
) When a sequence of 10H (48H) codes is received, set the cursor to the first column of the first line at the upper left corner of the screen.

(vil Cursor Addressing ESC (IBH) When a sequence of ten Y (59H) codes is received, set the addressing mode,
Next, the received two display character codes are used to specify absolute specifications for the line type and the column type for the latter.

That is, the cursor can be set to any line or column on the display screen by ESC+Y+line specification specification character column specification character code sequence.

fvi) When receiving the screen clear FESC (LBH) + K (45H) code sequence, erase the entire screen display. At this time, the cursor is set in the first column of the first line at the upper left corner of the screen.

(viii) Screen erase When a sequence of ISC(IB)i)+J(4AH) codes is received, the display from the current cursor position to the end column of the last line is erased. At this time, the cursor does not move.

(1 掁 Line Erase When the ESC (IBH) + K (4BH) code sequence is received, the display from the current cursor position to the end column of that line is erased. At this time, the cursor does not move.

(x) Self-diagnosis function ■ When the ESC (IBH)-1-U (55H) code sequence is received, "H" is displayed on the entire screen and the cursor is set in the first column of the first line.

■ When an ESC (IBH) IV (56H) code sequence is received, the characters that can be displayed on the screen are displayed one space apart from the first column of the first line, and the cursor is moved to the first column of the first line. Set to column.

(51 Received code processing in ESC sequence mode When set to ESC sequence mode, the above-mentioned processing is performed depending on the content of the next received character code, and after processing, the mode is set to normal mode or ESC sequence mode.

As explained above, according to the present invention, characters with distinguishing whole notes and special characters can be displayed as they are on a character display, making it possible to display communications between different countries. By using this, the versatility and operability of the document creation terminal device are greatly improved.

[Brief explanation of drawings]

1 is a block configuration diagram showing an example of a character display embodying the present invention; FIG. 2 d1 is an explanatory diagram of character configuration blocks of the character generator of FIG. 1; FIG. 6 is a ROM of FIG. FIG. 4 is a block diagram of the CRT control program; FIG. 5 and FIG. FIG. 2 is a flowchart showing a display control routine and a display information conversion routine of the program. 1...CRT display 21゛CRT control section...CRT 4...Video amplifier circuit 5...
・Horizontal deflection circuit 6...Vertical deflection circuit 20...CP
U 21...ROM 22...RAM25.2
6...Refresh memory (V-RAM) 27.28
...Character generator 29...CRT controller 60...Video control circuit

Claims (1)

[Claims] 1. In a character display that inputs character information to be displayed and control information necessary for display control and displays character information according to the control information, the input character information is changed to predetermined display character information. a determining means for determining whether character information conversion command information for instructing conversion is added; and character information for converting the inputted character information into predetermined display character information based on the determination result of the determining means. A character display characterized by comprising a conversion means.