JPH04239674A - Data processor - Google Patents

Abstract

PURPOSE:To provide the data processor able to work on a CG memory having a capacity only for single space character patterns by a method wherein proportional width is made practical by using the single space character patterns. CONSTITUTION:An external apparatus 1 reads a character code from an external memory 2, and a microprocessor 3 converts the character code into a CG address referring to a code conversion memory 5. Then, the microprocessor 3 refers to a proportional control memory 4 to judge whether or not the character code under processing at present is a proportional width character. In the case it is a proportional width character, the character code is written with the writing start address shifted when it is written on a frame buffer memory 7.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data processing apparatus, and particularly to a data processing apparatus for character editing such as a printer or a word processor.

0002

2. Description of the Related Art In order to print and display characters using printers, word processors, etc., a character pattern is prepared in advance within the device, and arbitrary characters are generated and edited during printing and display. An example of a conventional data processing device for this type of character editing is shown in FIG. This data processing device includes an external storage device 2 that stores character codes, a microprocessor 3, an external device 1 that controls input/output to the external storage device 2 and the microprocessor 3, and a CG (character gene) system that stores character codes.
(rator) A code conversion memory 5 that stores information necessary for converting into memory addresses, a CG memory 6 that stores character patterns, a frame buffer memory 7 for character drawing, and a frame buffer memory 7. It is composed of a printing/display device 8 that allows the drawing results to be visually displayed. Note that the microprocessor 3 performs data calculations, writes/reads from memory, and inputs/outputs to/from the external device 1.

FIG. 8 shows an example of the format of a code conversion table recorded in the code conversion memory 5 of a conventional data processing apparatus having such a configuration. Further, an example of the format of the character code file recorded in the external storage device 2 is shown in FIG. The arrangement of character codes in the upper part of FIG. 9 is an example of a character code file. Character code 41 (H) represents "A". Further, examples of character pattern storage and dot images in the CG memory 6 are shown in FIGS. 10 and 11. Figure 10
According to , the character pattern "A" corresponding to character code 41 (H) is CG address 1000 (H) in CG memory 6.
The character pattern "B" corresponding to the character code 42(H) indicates that the data is stored starting from the CG address 1010. Also, according to FIG. 11,
The character pattern is expressed by dots, 24 dots x
Designed within 30 dots.

Next, the operation of this data processing device will be explained. First, the external device 1 reads a character code file recorded in the external storage device 2 and passes the character code to the microprocessor 3. The microprocessor 3 converts the character code into C by referring to the code conversion memory 5.
Convert to G address. Taking FIG. 10 as an example, it shows that the character pattern of character code 41 (H) is stored from the CG address beginning 1000 (H) of the CG memory 6. Next, the microprocessor 3 generates a character pattern of 24 dots x 3 from address 1000 (H) of the CG memory 6.
Read 0 dots and write to frame buffer memory 7. The drawing result written to the frame buffer memory 7 is shown in FIG.

The origin address of the frame buffer memory 7 is X=0, Y=0, and the character pattern is 24 dots x 30 dots, so the first character has an X address of 0 to 17 (H ), the Y address is drawn in the area from address 0 to address 1D(H). The second character is Y at the X address from address 18(H) to address 2F(H)
Addresses are drawn in areas within the same address. The third and subsequent characters are processed in the same way. However, when drawing to frame buffer memory 7, the origin address is X=0
, Y=0, it is possible to write from any address. For example, “E” in Figure 12 has an origin of X=18 (
H) and Y=1E(H). In this case, the character position is determined by inserting a functional character such as a line feed code or horizontal tab code before the character code.

Next, the microprocessor 3 reads out the image drawn in the frame buffer memory 7 and prints it.
The information is output to the display device 8 and printed on printer paper or displayed on a display.

[0007]

In the conventional data processing apparatus, since a single space character pattern is used, all characters have the same width as shown in FIG. Therefore, in European languages, there is a gap between lowercase letters such as i and j and the adjacent letters, making the letters difficult to read.

An object of the present invention is to realize a proportional width using a single space character pattern, and because a character pattern for the proportional width is not required, the CG memory capacity can be reduced to data that can be realized only with a single space character pattern. The purpose of this invention is to provide a processing device.

[0009]

[Means for Solving the Problems] A data processing device of the present invention includes a microprocessor that calculates data, writes and reads memory, and performs input/output to and from external devices, and a microprocessor that converts character codes into CG memory addresses. code conversion memory that stores information necessary for character width, information necessary to determine whether or not it is a proportional width character, left offset number that indicates the number of dots to be offset in one direction, and character pitch that indicates the dot width of the character. The microprocessor includes a proportional control memory for storing numbers, a CG memory for storing character patterns, and a frame buffer memory for character drawing.
The external device refers to the code conversion memory to convert the character code read from the external storage device into a C character code.
G address, and then refers to the proportional control memory to determine whether or not the character code currently being processed is a proportional width character. If it is a proportional width character, the CG address is The present invention is characterized in that when writing the character pattern read from the memory into the frame buffer memory, the drawing start address is shifted and drawn.

The data processing device of the present invention also includes a microprocessor that calculates data, reads and writes data from memory, and performs input/output to and from external devices, and a CG computer that converts character codes.
A code conversion memory that stores the information necessary for converting to a memory address, a left offset number that indicates the number of dots offset in one direction, and a proportional control memory that stores the character pitch number that indicates the dot width of a character. , a CG memory for storing character patterns, and a frame buffer memory for character drawing, and the microprocessor refers to the code conversion memory for character codes read by the external device from the external storage device. Convert the character code to a CG address,
Next, when a character pattern is read from the CG memory and written to the frame buffer memory, the drawing is performed while referring to the proportional control memory and shifting the drawing start address.

Furthermore, the data processing device of the present invention includes a microprocessor that calculates data, reads and writes data, and performs input/output to and from external devices, and a character code file in which a certain character code string is printed as proportional width characters. Alternatively, an external storage device that stores control information on whether to display or not, and a code conversion memory that stores information necessary to convert character codes to CG memory addresses;
a proportional control memory that stores a left offset number indicating the number of dots to be offset in one direction and a character pitch number indicating the dot width of a character;
The microprocessor includes a CG memory for storing character patterns and a frame buffer memory for character drawing, and the microprocessor refers to the code conversion memory to read character codes read from the external storage device by the external device. The character code is converted into a CG address, and then it is determined whether the character code currently being processed is a proportional width character based on the control information, and if it is a proportional width character, the character code is read from the CG memory. When writing a character pattern to the frame buffer memory, the character pattern is drawn by referring to the proportional control memory and shifting the drawing start address.

0012

Embodiments Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of a data processing apparatus according to an embodiment of the present invention. This data processing device includes an external device 1, an external storage device 2, a microprocessor 3, a code conversion memory 5, a CG memory 6, a frame buffer memory 7, a print/display device 8, and a proportional width character controller for storing proportional width character control information. - Consists of control memory 4.

The external device 1, external storage device 2, microprocessor 3, code conversion memory 5, CG memory 6, frame buffer memory 7, and printing/display device 8 are the same as those in the prior art shown in FIG. .

FIG. 2 is a block diagram of proportional control memory 4. The proportional control memory 4 contains a proportional bit 9 indicating whether or not it is a proportional width character, a left offset number 10 indicating the number of dots to be offset to the left,
A character pitch number 11 indicating the dot width of a character is stored. As a specific example, FIG. 3 shows an example of the case of the lowercase alphabetic letter "i". The left offset number 10 of the alphabet lowercase letter "i" designed within 24 dots x 30 dots is 9 dots, and the character pitch number 11 is 6 dots.

Next, the operation of this embodiment will be explained with reference to FIGS. 1, 2, 3, and 4. First, the external device 1 reads a character code file recorded in the external storage device 2 and passes the character code to the microprocessor 3. The microprocessor 3 converts the character code into a CG address by referring to the code conversion memory 5. Next, the microprocessor 3 refers to the proportional bit 9 of the proportional control memory 4 shown in FIG. 2 to determine whether or not the character code currently being processed is a proportional width character. If the character is not a proportional width character, the subsequent processing operations are exactly the same as in the conventional example.

[0017] If it is a proportional width character,
Read the character pattern from the CG memory 6 and set the frame.
When writing to the buffer memory 7, drawing is performed by shifting the drawing start address of the X direction address to the left by the number of dots corresponding to the left offset number 10, as shown in FIG. In the example shown in Figure 4, the first character is a lowercase letter "a", the second character is a proportional width character "i" shown in Figure 3, and the third character is a lowercase alphabetical character "i". This is an example of drawing "e". If the second character is not a proportional width character, the X address will be drawn from address 18(H) to address 2F(H), but in this case, since it is a proportional width character, the start of the X address is 18(H). −09(H)=0F(H). Also, the start of the X address of the third character “e” is the X start address of the second character + left offset number 10 +
The number of character pitches is 11. In the case of Figure 4, 0F(
H)+09(H)+06(H)=1E(H) becomes the start of the X address of the third character "e". These X-direction calculations are performed by the microprocessor 3 using the frame buffer
This is done when drawing characters to the memory 7. Next, the microprocessor 3 reads out the image drawn in the frame buffer memory 7, outputs it to the print/display device 8, and prints it on printer paper or displays it on the display.

FIG. 5 shows a block diagram of another example of the proportional control memory 4. This proportional control memory 4 is composed of a left offset number 10 and a character pitch number 11, excluding the proportional bit 9 shown in FIG. When using the proportional control memory 4 shown in FIG. Shift the drawing start address of the X direction address to the left by several minutes and draw. Other operations are similar to those of the previous embodiment.

FIG. 6 shows another example of the character code file. In this example, the control information for whether or not a certain character code string is printed or displayed as proportional width characters is
It is stored in the character code file of the external storage device 2. The data processing device processes the character code after the proportional valid code 12 as a proportional width character, and performs the processing operation for the character code after the proportional invalid code 13 in exactly the same manner as in the conventional example.

[0020]

As explained above, according to the data processing device of the present invention, a proportional width is realized using a single space character pattern, and a character pattern for proportional width is not required. has the effect that it can be realized using only a single space character pattern.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a data processing device according to an embodiment of the present invention.

FIG. 2 is a diagram showing an example of a proportional control memory.

FIG. 3 is a diagram showing definitions of a left offset number and a character pitch number.

FIG. 4 is a diagram showing frame buffer memory drawing.

FIG. 5 is a diagram showing another example of a proportional control memory.

FIG. 6 is a diagram showing an example of a character code file.

FIG. 7 is a block diagram of a conventional data processing device.

FIG. 8 is a diagram showing a code conversion memory.

FIG. 9 is a diagram showing a conventional character code file.

FIG. 10 is a diagram showing a CG memory.

FIG. 11 is a diagram showing a character pattern of a CG memory.

FIG. 12 is a diagram showing frame buffer memory drawing in a conventional example.

[Explanation of symbols]

1 External device 2 External storage device 3 Microprocessor 4 Proportional control memory 5
Code conversion memory 6 CG memory 7 Frame buffer memory 8 Printing/display device 9 Proportional bit 10 Number of left offsets 11 Number of character pitches 12 Proportional valid code 13 Proportional invalid code

Claims (3)

[Claims] 1. A microprocessor that calculates data, writes and reads memory, and performs input/output to an external device; and a code conversion memory that stores information necessary to convert character codes to CG memory addresses. a proportional control memory that stores information necessary to determine whether the character is a proportional width character, a left offset number that indicates the number of dots to be offset in one direction, and a character pitch number that indicates the dot width of the character; The microprocessor includes a CG memory for storing character patterns and a frame buffer memory for character drawing, and the microprocessor refers to the code conversion memory to read character codes read from the external storage device by the external device. Converts the character code to a CG address, then refers to the proportional control memory to determine whether the character code currently being processed is a proportional width character, and if it is a proportional width character, , said C
The character pattern read from the G memory is transferred to the frame
A data processing device characterized in that when writing to a buffer memory, a drawing start address is shifted and drawn. 2. A microprocessor that calculates data, writes and reads memory, and performs input/output to and from external devices; and a code conversion memory that stores information necessary to convert character codes to CG memory addresses. Proportional control memory that stores the left offset number that indicates the number of dots to be offset in one direction and the character pitch number that indicates the dot width of the character, CG memory that stores character patterns, and frame buffer for character drawing. and a memory, the microprocessor comprising:
The external device refers to the code conversion memory to convert the character code read from the external storage device into a C character code.
Then, when reading the character pattern from the CG memory and writing it to the frame buffer memory, the proportional control
A data processing device that performs drawing by shifting a drawing start address by referring to a memory. Claim 3: A microprocessor that calculates data, writes and reads memory, and performs input/output to external devices; An external storage device that stores control information, a code conversion memory that stores information necessary to convert character codes to CG memory addresses, a left offset number that indicates the number of dots to be offset in one direction, and a character dot width. , a CG memory for storing character patterns, and a frame buffer memory for character drawing; converting the character code read from the character code into a CG address by referring to the code conversion memory, and then determining whether or not the character code currently being processed is a proportional width character based on the control information; If it is a proportional width character, when writing the character pattern read from the CG memory to the frame buffer memory, refer to the proportional control memory and shift the drawing start address before drawing. Characteristic data processing device.