JPS63315257A - Printer - Google Patents

Abstract

PURPOSE:To enable printing to be performed from an independent printer standpoint at a low cost, by a method wherein by selecting either of printing data from an interface part or printing data from a memory with an input control part, the selected printing data are printed. CONSTITUTION:When a selection switch 12 is on, an input control part 11 sends an impermissible signal to a printing data supply part 10 via a control wire B and sends a permission signal to a channel interface device 1 via a control wire A, and indicates that data are inputted to the channel interface device 1. Further, when the selection switch 12 is off, the input control part 11 indicates that data are inputted to the printing data supply part 10 by a reverse procedure. Thus, the input control part 11 selects either of the channel interface device 1 or the printing data supply part 10. Further, the channel interface device 1 and the printing data supply part 10, only when permission is indicated respectively through control wires A, B, input printing data to an input buffer 2. Then, this data are converted to an internal code by a conversion table 3.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a printing device that is connected to a host computer, processes print data sent from the host computer, stores it in a page buffer, reads the data, and prints the data. It is related to.

[Conventional technology]

Generally, this type of printing device is used by being connected to a host computer, and stores print data sent from the host computer in an input buffer, processes it and stores it in a page buffer, and stores one or more pages. At that stage, printing was started.

FIG. 2 is a 1099 diagram showing such a printing device as disclosed in, for example, Japanese Unexamined Patent Publication No. 56-162139, in which the river is a channel interface device, (2) is an input buffer, and (3) is a conversion table. , [4) Vi page buffer,
(5) (g) is a line buffer that takes out print data from the page buffer (4) and stores one line, (6) is a front memory, (7) is a parallel-to-serial converter, and (8) is a printer.

Next, the operation of this type of conventional printing apparatus will be explained.

First, in FIG. 2, print data sent from the host computer is sent to the channel interface device Fi.
1 line of data is received through the input buffer (2
). This one row of data is stored in the conversion table (
After being converted into an internal code (address information in font name July 6) in step 3), it is stored in the page buffer (4). By repeating such operations, printing is started when one page or more of data is stored in the page buffer (4). At the time of printing, Vcl-t, one line of data converted into an internal code is transferred to the line buffer (5). Two line buffers (5) are usually arranged in parallel, and while the data in one line buffer (6) is being printed, the data for the next line is prepared in the other line buffer (+). The read access to the font memory (6) is performed by the row buffer (5+, ((+ data (address information \ji of the font memory (6)), and the read character pattern information is sent to the parallel-serial converter (7). ), the dots are sent to the printer (8) and printed.

[Problem that the invention seeks to solve]

This type of conventional printing device is configured as described above.
It was connected to a host computer and processed print data sent from the host computer to perform printing. However, in many cases, printing devices print in a so-called fixed format due to security and operational requirements, and in such cases, it is necessary to send data from the host computer. This has the disadvantage that it increases the load (including the channel occupation rate) and that maintenance cannot be performed without the host computer.

The present invention has been made to solve the above-mentioned inconveniences, and it is an object of the present invention to provide an inexpensive printing device that has a mechanism that allows the printing device itself to print.

[Means for solving problems]

The printing device according to the present invention has an interface unit that outputs print data from the outside, and a memory that stores print data separately from the print data, and has an input control unit that outputs the print data from the interface unit or By selecting any of the print data from the memory, the selected print data is printed.

[Effect]

The printer introduction section in this invention reads out print data from a memory different from the print data input to the interface section from the outside, inputs it into the input buffer, and prints it.

[Embodiments of the invention]

An embodiment according to the present invention will be described below with reference to FIG. In FIG. 1, (9) is a memory that stores print data, a print data supply unit that performs processing to input print data in (101 memory (9) to input buffer 12),
(II) The print data is sent to the channel interface device.
Enter from II or print data from Kansai Department (lO)
An input control section (12) is a selection switch that controls the input control section (11).

In addition, (A) shown in FIG.
), a control line that instructs “permit” or “disallow” to (C
) is “on” from the selection switch 02) to the input control unit (river
Or it is a control line that instructs one-year-old operation.

It should be noted that parts given the same reference numerals as in FIG. 2 indicate the same or equivalent parts as in FIG. 2, and therefore the explanation thereof will be omitted.

Next, the operation will be explained using the block diagram shown in FIG.

First, the input control section (ll) instructs the channel interface device [1] or the print data supply section (10) to input print data from either one to the input buffer (2).

The input control unit (ll) is connected to the channel interface device (1).
) is instructed to input print data into the input buffer (2), the same processing as in conventional printing devices is performed and printing is performed.

Next, the input control unit (++) is connected to the print data supply unit (lO).
A case in which instructions are given to input print data to the input buffer (2) will be explained.

The print data supply section (10) takes out one line of print data from the memory (9) and inputs it into the input buffer (2). This data is converted into an internal code in a conversion table (3) and then stored in a page buffer (4). The procedure from this point on until printing is the same as that of conventional printing apparatuses.

Next, a method by which the input control section (11) selects the channel interface device +1) or the print data supply section (IO) will be described.

The selection switch (I2) is a switch that provides binary information of the input control section (for river, 1 on # or 1 year old).

If it is defined that when the selection switch (I2) is "ON", the channel interface device +1) is selected, and when it is "ODE", the print data supply section (10) is selected, then the input control section performs the following operations.In other words, the input control section When the print data supply unit (selection switch 02) is set to “off”, the print data supply unit (selection switch 02)
10) through the control line (B), and the channel interface device +1) through the control line (5).
) to instruct the channel interface device [1) to input data. In addition, when the selection switch (12) is 1 off'', it instructs to input data to the print data supply unit (101) by following the reverse procedure.In this way, the input control unit (11) Select the channel interface device (1) or the print data supply section (10).

Further, the channel interface device +11 and the print data supply section (10) input print data to the input buffer (2) only when "permission" is instructed through the control lines (A) and (B), respectively.

Note that in the above example, the print data input from the print data supply unit to the input buffer is converted into internal code using the conversion table, but print data that has been converted into internal data may also be used.

Moreover, any method may be used for the input control section to select the channel interface device or the print data supply section, and the same effect will be achieved.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to perform printing on its own at low cost by simply adding a memory, an input control section, and a print data supply section to a conventional printing apparatus.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a printing device according to an embodiment of the present invention, and FIG. 2 is a block diagram showing a conventional printing device. +1+ is a channel interface device, (2) is an input buffer, (4) is a page buffer, (9) is a met,
(10) is a print data supply unit, (11) is an input control unit,
(12) is a selection switch. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Claims] an interface section that outputs first print data input from the outside; an input buffer connected to this interface section that temporarily stores input print data; and one or more pages of print data output from this input buffer. A printing device that has a page buffer that stores a page buffer and prints data from this page buffer includes a memory that stores second print data, and a memory that stores the second print data read from this memory and stores the second print data that is read from the memory and prints data from the page buffer. and an input control unit that controls the print data supply unit and the interface unit to output either the first print data or the second print data to the input buffer. A printing device characterized by: