JPS6161861A - Printer control apparatus - Google Patents

Abstract

PURPOSE:To make it possible to perform not only overlap-writing printing without printing the same line plural times but also high speed printing as a whole, by taking the OR of data inputted prior to inputting data to image data memory before writing said data. CONSTITUTION:A microprocessor 4 judges whether data to be read are present in a character buffer part 21 and reads said data. Next, said microprocessor 4 judges whether line feed is performed and, when no line feed is performed, judges whether a carriage is returned. In the case of no carriage return, said microprocessor 4 reads the data corresponding to a character code from character font memory 3 and succeedingly reads the data 2 shown by a pointer and takes OR of data 1 and data 2 to store both data 1, 2 in an image buffer part 22. Information, wherein the data 1 and the data 2 are superposed, is formed in the image buffer part 22. Overlap-writing printing is performed by once line feed when superposed information is stored in the image buffer part 22.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a printer-based i'J device that prints various data on paper, etc. This invention relates to a printer control device.

(Prior Art) Conventionally, when using a serial printer to perform overlapping printing consisting of, for example, characters and a frame surrounding them, as shown in FIG. 3, first, as shown in FIG. 4 (A), The same line was printed twice, such as printing only the characters and then printing the frame as shown in (b).

FIG. 5 is a flowchart showing an example of the operation of the control device for causing the printer to perform such operations.

(Problems to be Solved by the Invention) Since conventional control Il devices perform such operations, performance deteriorates during overwriting printing, and overall there is a problem in performing high-speed printing. was there.

The present invention 1 was made in view of the problems with the conventional 11iN, and its purpose is to be able to perform overwriting printing without printing the same line multiple times, and to be able to perform high-speed printing as a whole. The object of the present invention is to realize a printer control device.

(Means for Solving the Problems) The present invention to solve these problems includes an image data memory that stores image data, and a printer that prints the image data stored in the image data memory. The apparatus is characterized in that, when inputting data to the image data memory, means is provided for performing an OR operation with previously input data and then writing the data to create scale information in the image data memory. It is something to do.

(Example) Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a configuration block diagram showing an example of the apparatus of the present invention. In the figure, 1 is a printer, 2 is a buffer memory, and 3 is a printer.
4 is a character font memory, 4 is a microprocessor, and 5 is an I10 port connected to an external device (for example, a host computer), not shown, and these are connected to each other via a bus BS.

The buffer memory 2 has a character buffer section 21 that stores input character codes, and an image buffer section 22 that stores image data to be output to the printer 1.

The microprocessor 4 processes the print data from the I10 port 5, stores the input character code in the character buffer section 21, and reads it from there.
Developing the c character code into font data and writing it into the image buffer section 22, or reading out the image data stored in the image buffer section 22,
It also performs tasks such as outputting to the blink 1 and controlling the movement of the print head of the printer 1 and the feeding of printing paper. In this microprocessor 4, 41 is an image buffer 1
When inputting data to section 21, a means is shown for ORing with previously input data and then writing the data to create overwrite information in image buffer section 22. This means is realized, for example, by a program or by specializing the bus interface of the image buffer memory and performing a read modify write during a write operation.

In the apparatus configured as described above, the operation of creating overlapping information in the image buffer/portion 21 by the microprocessor 4 and the overwriting information creating means 41 is then performed in the second step.
This will be explained with reference to the flowchart shown in the figure.

First, the microprocessor 4 determines whether or not there is data to be read in the character buffer portion 21 of the buffer 7 memory (step 1), and if there is data to be read, the data (character) is read (step 2).
). Note that in step 1, if there is no data to be read, the process moves to the next sequence.

Next, determine whether it is a line feed (LF) or not (step 3), if not, a carriage return (OR).
(Step 4)

In step 4, if there is no carriage return,
First, read the first character font (data 1) corresponding to the character code from the character font memory 3 (step 5), then read the second character font (data 2) indicated by the pointer (step 6). ), performs an OR operation on data 1 and data 2 (step 7), and stores both data in the image buffer portion 22 (step 8). Through the operations from step 3 to step 8,
Information in which data 1 and data 2 overlap is created in the image buffer portion 22. Subsequently, the pointer instruction is raised (step Q) and the process returns to step 1.

If it is determined in step 3 that it is a line feed, a print command is issued (step 10) and printing is performed (
Step 11). The printing operation here is performed by reading the image data from the image buffer 1 portion 22. If overlapping information is stored in the image buffer portion 22, the overlapping indentation is performed by one line feed. is printed. After printing is completed, the contents of the image buffer 1 portion 22 are cleared (step 12), the image buffer pointer is cleared (step 13), and the process returns to step 1.

If it is determined in step 4 that it is a carriage return, the process moves to step 13 and the image buffer pointer is cleared. .

In the flowchart of FIG. 2, other codes for controlling the printer 1 are omitted.

In the above description, the printer 1 is a wire dot type printer or a laser printer.

Various printers can be used, such as a thermal transfer printer or a page printer.

(Effects of the Invention) As explained above, according to the present invention, overlapping printing can be performed without printing the same line multiple times,
A printer control device capable of high-speed printing can be realized.

[Brief explanation of drawings]

FIG. 1 is a configuration block diagram of an embodiment of the device of the present invention;
FIG. 2 is a flowchart showing an example of the operation of the device shown in FIG. 1, FIG. 3 is an explanatory diagram showing an example of overwriting printing, and FIG. 4 is an explanatory diagram for explaining the fh operation of overwriting printing in a conventional device. , FIG. 5 is a flowchart showing an example of the operation of the conventional device. 1...Printer 2...Memory 21...Character buffer section 22...Image buffer section 3...Character font memory 4...Microprocessor 41...Overwriting information creation means 5... I10 Boat % 1 Figure Hanging 3 Figure Mouth Tapping 4 Figure

Claims (1)

[Claims] In an apparatus equipped with an image data memory that stores image data and a printer that prints the image data stored in the image data memory, when data is input to the image data memory, an OR with previously input data is used. 1. A printer control device comprising: a means for generating overwrite information in said image data memory by writing said data therein;