JPH0378652B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a copy modification function in a Kanji printer.

[Conventional technology]

FIG. 2 is a block diagram of a conventional kanji printer device. In the figure, 1 is a command sent from a host computer through a channel, 2 is a channel interface unit that receives this command,
3 is a control work area, 4 is a conversion table that converts logical character codes in data accompanying commands sent from the host to real addresses (physical codes) in the Kanji printer, and 5 is text print data. is a page buffer that can store multiple pages in page units, 6 is a copy modification buffer that stores information and print data for replacing specified characters in text print data, and 7 is a copy modification buffer that stores characters based on page buffer 5 and copy modification buffer 6. After completing the switching process, the line buffer that stores one line of print data is configured in a double configuration to perform writing and reading in parallel. Reference numeral 8 is a font memory that loads character patterns corresponding to each character code in advance and outputs the character patterns based on the character codes read from the line buffer 7. Reference numeral 9 converts logical character codes sent from the host into physical character codes. A signal line for converting and writing the character pattern together with the font memory 8 is shown, 10 is a print section interface for sending the character pattern to the printing mechanism section, and 11 is print data sent from the print section interface 10.

Next, the operation will be explained. With command 1 sent from the host computer through the channel,
First, copy modification data for modifying text data is sent. When copying text data (printing the same page repeatedly), the control information includes the first page where characters are replaced, the number of applicable pages, the starting line within the page, the number of applicable lines, and the starting position within the line. , followed by a logical character code to be replaced. Once these data enter the work area 3, the logical character code is converted into a physical character code by the conversion table 4, and the control data is stored in the copy modification buffer 6 as is. Next, with command 1,
Text data is sent, converted into a physical character code through a conversion table 4, and stored in a page buffer 5. When there is print data of one or more pages in the page buffer 5, the printing operation is started, and thereafter the printing operation is performed continuously following paper conveyance, and when there is no printing data in the page buffer 5, the printing operation is stopped. At this time, if copy modification is specified for the text data, character codes are changed line by line by a page buffer 5 and a copy modification buffer 6, and the process of loading the code into a line buffer 7 is carried out without delaying paper conveyance. This is because the printing operation is performed page by page and cannot be controlled line by line. At this time, since the line buffer 7 has a double buffer configuration, it performs the process of replacing one line and stores it in the line buffer 7, reads the physical code of the previous line already stored on the line buffer 7, and uses the font memory 8 to create a character pattern. and print department interface 10
The process of sending the print data 11 is performed in parallel through the print data 11. In this case, while printing one line of data, it is necessary to align the print data of the next line.
Since it is impossible to start/stop the paper line by line in the printing mechanism, an error will occur if the data for the next line is not complete.

[Problem that the invention seeks to solve]

Conventional kanji printers are configured as described above, so it is necessary to complete the replacement of the print data for the next line before the print of the previous line is finished, which reduces the printing speed and the processing speed of the control system. Since the number of characters that can be replaced in the same line is determined from , it is difficult to replace a large number of local character codes on the same page or replace a large number of character codes within a page, and if the limit is exceeded, an error will occur. There are problems such as the occurrence of the above-mentioned drawbacks and the need for an expensive high-speed control circuit to overcome the above-mentioned drawbacks.

This invention was made in order to solve the above-mentioned problems. Even if a large number of character codes are locally replaced on the same page, continuous printing is performed, and the replacement of a large number of character codes on the page is prevented. To provide an inexpensive kanji printer that can perform normal printing while stopping printing even when there is a change.

[Means for solving problems]

The kanji printer device according to the present invention replaces character codes not on a line-by-line basis but on a page-by-page basis, provides a page print buffer for storing the print data, and controls printing start/stop for one page in this buffer. Control is performed depending on whether or not print data is stored.

[Effect]

The page printing buffer of this invention manages the amount of character code replacement on a page-by-page basis in order to perform normal printing operations, averages local large-volume processing within a page, and prints pages at print start/stop. Buffer-based control makes it possible to temporarily stop printing and restart after aligning the print data even if a large number of character code changes occur within a page, thereby preventing errors from occurring.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to the drawings. In Figure 1, 1 is a command sent from the host computer through a channel, 2 is a channel interface section upon receiving command 1, 3 is a work area, and 4 is a conversion table that converts the logical character code to the physical address of the Kanji printer. , 5
1 is a page buffer that stores text print data for multiple pages in units of pages, 6 is a copy modification buffer that stores logical character codes and control information that are replaced with text data, and 12 is a page buffer that stores text print data for each page by replacing characters with the page buffer 5 and copy modification buffer 6. The page print buffer is stored in a double configuration to parallelize writing and reading. Reference numeral 8 is a font memory in which a character pattern corresponding to each character code is loaded in advance and the character pattern is obtained from the physical character code read from the page print buffer 12; 9 is a font memory for writing the character pattern into the font memory 8; Indicates data and physical character code. 10 is a printing unit interface that sends character patterns to the printing mechanism unit;
Reference numeral 11 indicates print data sent from the print section interface 10.

The operation of this invention will be explained below. With command 1 sent from the host computer through the channel,
Copy modification data is sent. This data is used to perform a process of changing the character code at a designated location in a copy operation that repeats the same text data. Therefore, the copy modification data includes the first page, the number of applicable pages, the starting line within the page, the number of applicable lines, and the application start position within the line as control information.
Contains logical character codes to be replaced following this. Once these data enter the work area 3, the control information remains unchanged, the logical character code is converted into a physical code by the conversion table 4, and then loaded into the copy modification buffer 6. Next, text data is sent by command 1, passed through conversion table 4, and stored in page buffer 5. When one or more pages of print data is accumulated in the page buffer 5, the character codes are changed according to the copy modification buffer 6, and the data is sequentially written into the page print buffer 12. After the character code replacement for one page is completed, the physical character code is read from this page print buffer 12 and stored in the font memory 8.
After obtaining a character pattern, print data 11 is sent to the printing mechanism section through the printer section interface 10 to start the printing operation. Since the page print buffer 12 has a double configuration, the character code replacement process and the print data 11 sending process are performed in parallel, so that printing can be performed continuously without stopping. In the unlikely event that a large amount of character code replacement occurs and the character code replacement processing cannot follow the printing operation, stop control can be performed on a page-by-page basis, and no errors will occur.

〔Effect of the invention〕

As described above, according to the present invention, character codes are replaced on a page-by-page basis, a page print buffer is provided to store the results, and printing start/stop is controlled on a per-buffer basis, so that an inexpensive device can be used. This has the effect of obtaining a product with good performance.

[Brief explanation of drawings]

FIG. 1 shows a block diagram of a kanji printer according to an embodiment of the present invention, and FIG. 2 shows a block diagram of a conventional kanji printer. 1 is command, 2 is channel interface section, 3 is work area, 4
is a conversion table, 5 is a page buffer, 6 is a copy modification buffer, 8 is a font memory, 9 is a character pattern, 10 is a printer interface, 1
1 indicates print data, and 12 indicates a page print buffer. In the figures, the same reference numerals indicate the same or equivalent parts.

Claims (1)

[Claims] 1. A memory in which a character pattern is preloaded, a copy function that repeatedly prints the same text data, a copy modification function that replaces characters at a specified position in accordance with the text data, and a buffer memory and text that store the copy modification data. In a kanji printer that has a page buffer for storing data, perform character code replacement processing on a page-by-page basis, control the results to be stored in the page print buffer, and check whether one page's worth of print data is collected in this page print buffer. A kanji printer data control system characterized by performing start/stop control of printing operation depending on whether the printing operation is stopped or not.