JPS59125432A - Print control system of incremental type printer - Google Patents

Abstract

PURPOSE:To reduce transfer data in amount greatly and to perform optimum printing operation by sending tab information out of a host device side and performing tab control when the number of spaces is larger than the specific quantity. CONSTITUTION:A host device 3 is provided with a transfer data control part 4. The transfer data control part 4 checks whether print information to be sent out to an incremental type printer 5 is space data or not and counts the number of successive space data, sends out tab control information on condition that the counted value is larger than the specific quantity. When said counted value is smaller than the specific value, space data is sent out, and when the print information is space data, print data is sent out.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention, when printing space data continuously in an incremental printer, counts the number of space data in a host device and keeps the counted value constant. The present invention relates to a print control method for an incremental printer in which tab information is sent from the host device when the value exceeds the value.

[Prior art and problems]

FIG. 1 is a diagram showing a conventional print control system, and FIG. 2 is a diagram showing an example of a transfer data string. In FIG. 1, 1 represents a host device, and 2 represents a printer.

The printer 2 includes one that has a data buffer, such as a dot printer, and one that does not have a data buffer, such as an incremental printer. 'If the printer 2 has a data buffer, the print data is sent from the host device 1 (then stored in the data buffer and then printed for one line at a time. .On the other hand, printer 2
If the device does not have a buffer, the host device 1
Each time print data is sent from the printer, printing is executed one character at a time. For example, if the printing range is from 1 to N as shown in Figure 2, in an incremental printer, the head moves incrementally regardless of the presence or absence of a space for print data, and prints several consecutive pieces of print data. Conventionally, spaces are printed one character at a time even if spaces are included. In the case of a printer having a data buffer, the contents of the data buffer can be searched on the printer side before printing, and optimal printing can be performed using space printing or tab control depending on the number of spaces.

Conventional incremental printers that do not have data buffers cannot perform printing control according to the number of spaces as described above, and for example, print data such as the one shown in Figure 2 cannot be executed. Even in columns, space code + 7) Illllll caspase printing is not achieved, and optimal printing is not achieved.

[Purpose of the invention]

The present invention is based on the above consideration, and an object of the present invention is to provide a print control method for an incremental printer that is capable of optimal printing according to the number of space data.

[Structure of the invention]

To this end, the print control method for the incremental printer of the present invention includes a host device and an incremental printer, and the incremental printer executes a printing operation each time print information is supplied from the host device. In this print control method for an incremental printer, the host device is provided with a transfer data control section, and the transfer data control section sends space data to the print information sent to the incremental printer. If it is space data, it counts the number of consecutive space data and sends tab control information on the condition that the counted value is above a certain value. The space data is sent out on the condition that a certain value is not reached, and if the print information is print data, the print data is sent out.

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 3 is a block diagram showing the configuration of one embodiment of the present invention;
The figure shows the flow of processing by the transfer data control unit.
It is a chart. In FIG. 3, 3 is a host device, 4 is a host device,
5 indicates a transfer data control unit, and 5 indicates an incremental printer.

In the present invention, when printing space data, if the number of spaces is less than a certain value M (varies depending on the machine), incremental printing 1. We focused on the fact that printing using tab control would speed up printing the most when the number of spaces is M or more, and when the number of spaces is M or more, tab control information is sent from the host device instead of a space code. It was set to 5.

In FIG. 3, when the host device 3 is provided with a transfer data control section 4 and print data is sent from the host device 3 to the incremental printer 5, the transfer data control section 4 counts the number of consecutive spaces. , M or more, the space code cannot be sent as print data, and a tab control code is sent.The flow of processing by the 5° transfer data control unit 4 will be explained with reference to the fourth part.

■ Clear space counters. Next, perform the process (■).

■ Clear the data address register.

Next, perform the process (■).

■ Set the byte count. Next, perform the process (■).

■ Decrement the byte count by 1. Next, perform the process (■).

■ Check to see if the byte count is 0. If Yes, the data transfer is terminated, and if No, 0 processing is performed.

■ Check whether the sent data is a space. In the case of Yes, the process ◎ is performed, and in the case of N5, the process ■ is performed.

■ Check whether the space flag is on.

If Yes, perform the process ``■'', and if NEI, perform the process [phase] and clear the 5°■ space flag. Next, perform the process ``■'' and check whether the tab flag is on.

If Yes, process 0, if Nδ, ◎
Process.

0 Clear tab flag. Next, process 0 and 5
゜■ Send tab control information. Next, process [phase]. .

0 Set space flag. Next, there is a processing capacity of 0.

0 Increase the space counter by 1. Next, 00 processing is performed.

0 Check whether the space count is M.

In the case of Yes, the process of [phase] is performed, and in the case of Nδ, the process of 0 is performed.

[Phase] Set the tab flag. Next, process 0.〇[Phase] Send print data. Next, the O0 space data to be processed by 00 is sent out according to the count by the O process. Next, process O is performed.

Add 1 to O data address register.

Next, return to the process of ■.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, when the number of spaces is M or more, tab control information is sent from the host device side to perform tab control. In the case of a print data string, the amount of data transferred is (
N-1) It becomes ten tab control information, which can significantly reduce the amount of data transferred, and also allows tab control to
Optimum printing can be achieved in the same way as printers with a

In particular, increasing the speed of printers is a complex issue, and attempting to increase speed by improving only the mechanism is fraught with various difficulties. However, according to the present invention, space printing and tab control can be executed on the host device side even in mechanically related (incremental type) printers, and the maximum speed printing of the mechanism itself can be achieved, and the effect is extremely remarkable.

[Brief explanation of drawings]

Fig. 1 is a diagram showing a conventional printing control system, Fig. 2 is a diagram showing an example of a transfer data string, Fig. 3 is a diagram showing the configuration of an embodiment of the present invention, and Fig. 4 @ is a transfer data control unit. 12 is a flow chart showing the flow of processing by. 1 and 3...host device, 2...printer, 4...
Transfer data control unit, 5... Incremental printer. Small 1 Figures 2 Figures W5

Claims (1)

[Claims] The computer comprises a host device and an incremental printer, and the incremental printer executes a printing operation each time printing information is supplied from the host device.
This is a print control method for incremental printers that have become
The transfer data control unit checks whether the print information sent out to the incremental printer is space data or not, and if it is space data, counts the number of consecutive space data and calculates the number of consecutive space data. Tab control information is sent on the condition that the numerical value is above a certain value, space data is sent on the condition that the above count value does not reach a certain value, and if the print information is print data, 5. A print control system for an incremental printer, characterized in that the printer is configured to send print data.