JPS61156188A - Character output 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 output method that receives input character codes and control codes and outputs characters expanded into image dot information.

[Conventional technology]

Conventionally, in this type of device, a character code input from an external device is interpreted and developed by an image dot development means such as a character generator that stores a plurality of font patterns, and the developed font pattern is (Dot information) is written in a frame memory that can be configured into pages, and is displayed on a display means 1 such as a CRT display or printed on an image output device 1 such as a laser beam printer in accordance with an output command or a display command. Furthermore, if the operator wants to output characters in bold characters such as Gothic, the operator specifies a font change in advance from an external device to output the character data in bold characters. When this font change command is received, image dot information is read from the font pattern memory for bold characters corresponding to the character for which the font change command has been issued into the frame memory, and is output in the same manner as described above.

[Problem that the invention seeks to solve]

In conventional devices, when a font change command is given to characters to be output as described above, the font is changed from a memory area prepared separately from the font memory that stores normal font patterns.
Since a font memory is required to output the corresponding character, for example, a bold character, there is a problem in that the memory area becomes large. This invention was made to solve this problem. This frees up the memory area in which the font pattern of each character's font has been changed, making it possible to store a much wider variety of font patterns in the same font memory area than before, and also The purpose of this invention is to obtain a character output method that can easily change the font.

[Means for solving problems]

The character output method according to the present invention moves the writing address of the frame memory by a predetermined address in response to the phono command of the input character, so that the same font pattern is written redundantly. .

[Effect]

In this invention, when a character font change command is received, the write address of the frame memory is moved by a predetermined address, and the same font pattern is written redundantly.

〔Example〕

FIG. 1 is a block diagram for explaining a character output method showing an embodiment of the present invention, and 1 is an interface;
Receives character code data and control code data input from an external device (not shown). A code converter 2 converts character code data input via the interface 1 into an internal font data code. A microprocessor 3 sends the font data code converted by the code converter 2 to the pattern generation control section 4 and controls the control bus. 5 is a font memory that stores the output u (7-ont pattern available), font information (number of dots in the width direction of the character, number of dots in the height direction of 9 characters, presence or absence of bold font) according to the character code. Then, a desired font pattern is read out in response to a read command from the pattern generation control unit 4, and written in accordance with the write address of the frame memory 6.The frame memory 6 stores the font pattern of each character and symbol in page units (specified A parameter table 7 stores a font number 7a indicating a print position and display position for a font pattern to be displayed and printed, and an address where the font pattern is stored. 8 is a font pattern table which refers to the font memory 5 and indicates the number of dots in the width direction of the 7 ont pattern to be displayed and printed;
A flag indicating the number of dots in the height direction and the presence or absence of a bold font is stored for each character.

Next, the operation will be explained.

The microprocessor 3 sets in advance the number of dots in the width direction of a character to be output to the font table and the number of dots in the height direction of one character based on the font information contained in the font memory 5. Furthermore, when the microprocessor 3 receives a font change command or bold character designation from an external device through the interface 1, it sets the internal font number 7a and whether or not bold character processing is necessary in the parameter table 7, and also sets the The font number 7a is sent to the code converter 2.

The external code input through the interface 1 is judged by the microprocessor 3, and if there is no control sequence including bold character designation or font change command, the font number designated by the external code is determined by the food converter 2, for example, roOJ, rol”, r02J
, ... is changed to the font number 7a specified by the internal code, such as "roo", r02J,
Convert to r04J,... Font number 7a is roIJ, r03J.

r05J,..., the font number 7a is rooJ
.

This is the bold font number corresponding to the characters r02J, r04J, . . .

The character data converted into internal codes up to the internal font number 7a by the microprocessor 3 is sent to the pattern generation control unit 4 together with print control data such as the coordinate position to be displayed or printed.
accesses the font memory 5 according to the internal code and executes writing of the font pattern into the frame memory 6 based on the print control data.

Next, the font pattern output operation for bold characters will be explained with reference to FIGS. 2 and 3.

FIG. 2 is a diagram illustrating a font pattern output operation when a font pattern for bold characters is provided.

Figure 3 is a diagram showing an example of outputting a font pattern.
1) is the font pattern for the character rC that is normally displayed, for example, and (2) is the font pattern for the character ``C'' that was created in advance.
” font pattern for bold characters.

When a font change command is issued to change the font type for a character output from an external device, for example, the external font number is "Ol," the microprocessor 3 changes the font number from the parameter table 7, as shown in FIG. 7a
is set to "03" and the presence/absence of bold character processing is set to "0". Next, the pattern generation control section 4 refers to this parameter table 7.

A font pattern in which the font number 7a is pre-processed with capital letters "03" is written into the frame memory 6 according to the print control data, and the font pattern (2) shown in FIG. 3 is displayed or printed. Output.

Next, referring to FIGS. 4 and 5, the operation of outputting a bold font pattern using a normal font pattern will be described.

FIG. 4 is a diagram illustrating the operation of outputting bold characters using a normal font pattern.

Figure 5 is a diagram showing an example of outputting a font pattern.
1) is the font pattern of the letter "C" which is normally displayed, for example, and (2) is the bold font pattern of the letter "C" created by overlapping the font patterns, and the Δ of Δ shown in this figure is This is the output point when the same font pattern is written twice.

When a font change command is issued to change the font type for a character output from an external device, for example, the external font number is "00," the microprocessor 3 changes the font number from the parameter table 7 as shown in FIG. 7a
is set to "OO" and whether or not bold text processing is performed, that is.

Set "1". Next, while referring to this parameter table 7, the pattern generation control unit 4 selects the font number 7.
When a font pattern in which a is "00" is written to the frame memory 6 according to the print control data, the processor 3 transfers the written write address to a predetermined address, for example r
lJ is incremented and the font number 7a is “0” again.
0" font pattern in font pattern table 8
The font pattern (2) shown in FIG. 5 is displayed or printed and output.

In addition, in the above embodiment, an example was explained in which the processor 3 generates the same font pattern repeatedly by the pattern control unit 4, but when making a font pattern that does not have a font pattern for uppercase letters bold, the first Needless to say, if the writing of the next font pattern is entrusted to the pattern control section 4 and the writing of the next font pattern is entrusted to a dedicated pattern generation section, and the processing is performed in parallel, the image development operation can be sped up. Further, in the above embodiment, the case where the predetermined address is incremented by rlJ and outputted has been explained, but it goes without saying that the setting may be made as appropriate depending on the shape of the font type.

〔Effect of the invention〕

As explained hereafter, this invention moves the writing address of the frame memory by a predetermined address in response to a character font change command input from an external device, so that the same font pattern is written twice. This method has the advantage that a far greater variety of font patterns can be stored in the same font memory area than in the past, and the font for each character can be easily changed.

[Brief explanation of the drawing]

FIG. 1 is a block diagram for explaining a character output method showing an embodiment of the present invention, FIGS. 2 and 4 are diagrams for explaining a font pattern output operation, and FIG. FIG. 5 is a diagram showing an example of outputting a font pattern according to the present invention. In the figure, 1 is the interface, 2 is the code converter, and 3
4 is a microprocessor, 4 is a pattern generation control unit, 5 is a font memory, 6 is a frame memory, 7 is a parameter table, 7a is a font number, and 8 is a font pattern table. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5

Claims (1)

[Claims] In a device that receives an input character code and a control code, reads out a font pattern of a character specified by the character code from a font memory, and writes it to a frame memory, the font pattern of the character specified by the input character code is read out from the font memory and written to the frame memory. A character output method characterized in that the writing address of is moved to a predetermined address and the same font pattern is written redundantly.