JPS63149724A - Printing control system - Google Patents

Abstract

PURPOSE:To prevent unprinted data from being erased or lost by forming dummy printing data in a page buffer when there are no data in the page buffer and unprinted data exist in a part other than the page buffer. CONSTITUTION:When printing control information is received, page frames are determined in the page buffer 3 and an image buffer 4. When the final image data exist on the way of a page and developed printing data are not included in the page buffer 3, a printer 5 returns a reception enable signal and waits the succeeding data. When the succeeding printing control information is received, the end of the preceding data is known at that time. Since no printing data exist in the page buffer 3 and printing data exist in the image buffer 4, dummy printing data (white page or the like) are formed in the page buffer 3, clear print processing is executed and a new page frame for the succeeding page is determined.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a print control method in a printer connected to a host or host model.

[Conventional technology]

FIG. 3 is a block diagram showing a conventional print control method disclosed in, for example, Japanese Unexamined Patent Publication No. 59-161728. In the figure, (5) is a printer, (6) is a memory, and (7) is print data. It is.

FIG. 4 is a block diagram showing the details of the memory part in FIG.
3) is a page buffer. FIG. 5 is an explanatory diagram showing the processing procedure of a conventional print control method.

Next, the operation will be explained. First, as shown in FIG. 3, print data (7) of page 1 is divided and sent from the host (1) to the memory (6) via the reception buffer (2). The print data (7) is expanded into the page buffer (3), and as soon as the printer processor finishes expanding the print data (7), it returns the next data request signal to the host (1) to request the next data to be sent. On the other hand, in the page buffer,
As soon as the passive data is developed and the printing conditions are met, printing is started without any print activation from the host (1) (Fig. 3). In this way, the above steps are repeated and printing is performed. The detailed operation will be explained according to the processing procedure shown in FIG.

In this print control method, when sending print data (7) in a format different from the previous one, the host (1) sends print control information (printing conditions such as the number of lines on one page) in advance of the print data. However, upon receiving the print control information, the processor of the printer checks the page buffer (3) to check whether data remains. If there is any remaining data, a print instruction is given to print out the remaining data, and during this time a busy number m is sent to the host (1). This is called clear print. When clear printing is completed, the printer processor returns a signal indicating that damage is possible, and in response to this, the host sends the next print data.

■The page buffer (3) receives print control information.
Decide on the page frame. In step (3), the print data sent in several parts is developed and set in the page buffer (3). In ■, the final data is in the middle of the page, but the printer (5) does not know that the data in ■ is the final data. Therefore, the printer (5) returns the injury status code and waits for the next data. When printer 4 (5) receives the next print control information, it learns the end of the previous data for the first time, performs clear print processing, and determines a new page frame for the next page. ] Since the conventional print control device is configured as described above, if there is no remaining data in the page buffer and data exists in other buffers (for example, image buffer), the next print control ff report is sent. When , a new page frame is set and the print data is lost, so TEX, T print data and image print data must always be specified even if they are not needed, and 10,000-TEXT print data must be specified. If you forget, there is a problem that the image print data will not be printed and will be lost.

The present invention was made to solve the above-mentioned problems, and an object of the present invention is to provide a printing control method that prevents data from being erased or lost due to unfinished printing.

[Means for solving problems]

The print control method according to the present invention creates dummy print data on the page buffer when there is no data in the page buffer and unprinted data exists outside the page buffer. .

[Effect]

The print control method according to the present invention is such that by creating dummy print data in the page buffer, it is possible to print all of the data that is not printed in areas other than the page buffer.

[Fu example]

An embodiment of the present invention will be described below with reference to the drawings. 1st
In the figure, symbols (1) to (3) and (5) refer to FIG.

This is the same as or corresponds to the conventional one shown in FIG. (4) is a buffer for image data expansion.

FIG. 2 is an explanatory diagram of the processing procedure in FIG. 1. In FIG. 1, print data (7) is sent via the injury buffer (2) to BOBT (1). Print data (7) is divided into TEXT data such as characters and image data such as graphs and images, and each is developed into a page buffer (3) and an image buffer (4).

Page buffer (3) K: Once one page of print data (7) has been developed, the contents of the page buffer (3) and image buffer (4) are combined and sent to the printer (5).

Referring to FIG. 2, detailed processing procedures will be explained.

In ■, the print control information is received and the page buffer (3
), image buffer (4) Determine K page frame.

In (2), the print data of the image sent in several parts is expanded and the image buffer (4) button is set. ■
In this case, it is assumed that the final image data is in the middle of the page, and that the expanded print data (7) does not exist in the page buffer (3). As in the past, the printer (5) does not know that the data marked with ■ is the final one. Therefore, the printer (5) returns acceptance #1- and waits for the primary data. At ■, when the printer (5) receives the next print control information, it will know that the previous data has ended, and the page buffer (3) will
There is no print data (7) in the image buffer (4).
), dummy print data (blank page, etc.) is created in the page buffer (3), clear print processing is performed, and a new page frame for the next page is determined.

In the above example, print data of image data has been described, but the same process can be applied to other overlay data and graph data.

〔Effect of the invention〕

As described above, according to the present invention, dummy print data is created even when there is no print data in the page buffer or even when T [T print data is not sent. This has the effect that printing can be performed independently without losing data that has not yet been printed.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a print control system according to an embodiment of the present invention, the second cause is an explanatory diagram showing the processing procedure of this invention, FIG. 3 is a block diagram of a conventional print control system, and FIG. Third
FIG. 5 is an explanatory diagram showing the processing procedure of the conventional invention. In the figure, (1) is l08T, +2) is love buffer,
(3) is a page buffer, (4) is an image buffer,
+j) is a printer, and (7) is print data. In addition, in the figures, the same reference numerals indicate the same or equivalent parts.

Claims (2)

[Claims] (1) In a print control method in which the host sends print control information and print data to the printer, and the printer prints in response, the printer remains in the buffer when the print control information instructs the next printing condition. Print control characterized by printing out print data even if printing conditions are not met, sending a busy signal to the host during this time, returning an acknowledgment upon completion of printout, and causing the host to send the next print data. method. (2) The print control method according to claim 1, characterized in that, when remaining print data exists, dummy print data is added as necessary and the data is forcibly printed.