JPH01184171A - Printer - Google Patents

Abstract

PURPOSE:To ensure a conversion table to prevent the generation of trouble in operation on and after, by providing an inverse conversion table and the conversion table as a pair. CONSTITUTION:When the continuation of operation becomes impossible by the generation of an error on the way of a series of operations from the registration of a conversion table 2 to the completion of the writing to a font memory and the situation discarding the data in a buffer memory 3 is generated, the next processing is performed. That is, when a font pattern is contained in the page buffer, by applying a physical character code to the address of an inverse conversion table 6, the logical character code being the content thereof can be obtained and the canceling of the registration of the conversion table 2 becomes possible. As mentioned above, since the printer is constituted so as to perform restoration at the time of the generation of an error by the inverse conversion table, user's convenience is excellent and a highly precise apparatus is obtained inexpensively.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a printer device having an external character processing mechanism,
In particular, it relates to a recovery method when a collision occurs.

[Conventional technology]

Figure 2 shows a conventional printer device with external character processing. In the figure, (1) indicates input data sent from a host computer, MT, etc., including logical character codes, control codes,
Contains font patterns.

(2) is a conversion table that converts the logical character code in input data (1) to a physical character code compatible with font memory (4), and (8) is a conversion table that converts the obtained physical character code in units of one page. A page buffer stores pages, and (4) represents a photo memory that stores font patterns for each physical character code. (5) is font memory (4)
A printout section is shown that prints out the obtained font pattern on paper.

Next, the operation will be explained. If there is a font pattern in the input data (1), it contains the corresponding logical character code, and this logical character code is given as the address of the conversion table (4), and the font pattern is Determine the memory storage address and write this as a physical character code to the logical character code address of the conversion table (4). Also, this physical character code is written to the page buffer (8) together with the font pattern. If font pattern data is available, a conversion table (2) is registered using the steps described above. Next, input data (1)
As, if the logical character code for print output data comes,
It is converted into a physical character code using the conversion table (4) and stored in the page buffer (8). Page buffer (8
), the font pattern is written to the corresponding physical character code address in the font memory (4). If it is a physical character code for output data, the corresponding font pattern is read from the font memory (4), sent to the print output section (5), and outputted onto paper.

[Problem to be solved by the invention]

Conventional printer devices are configured as described above, so
If it becomes impossible to continue printing due to an error during operation and the data in the page buffer is no longer needed, if the data contains a font pattern, the conversion table is restored to the corresponding logical character code section. However, it is impossible to know the original logical character code from the physical character code, and there is a problem that problems such as characterization may occur afterward.

This invention was made to solve the above-mentioned problems, and even if it becomes impossible to continue printing due to an error occurring during operation, the conversion table can be guaranteed, and the subsequent operation The object of the present invention is to obtain a printer device that does not cause problems such as character conversion. In order to make it possible to cancel the registration of the conversion table when doing so, an inverse conversion table is provided as a pair with the conversion table, thereby guaranteeing the contents of the conversion table.

[Effect]

The inverse conversion table in this invention enables the cancellation of the registration of the contents of the conversion table (=physical character code) corresponding to the logical character code by converting the physical character code stored in the page buffer to the logical character code, Guarantee the contents of the translation table.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. 1st
In the figure, (1) shows input data sent from a host computer, MT, etc., and includes logical character codes, control codes, and font patterns. (2) is a conversion table that converts the logical character code in input data (1) to a physical character code compatible with font memory (4), and (8) stores the obtained physical character code in units of one page. A page buffer (4) indicates a font memory that stores font patterns for each physical character code. (5) shows a print output section that prints out the font pattern obtained from the font memory (4) on paper. (6) shows an inverse conversion table for converting each physical character code into a logical character code.

Next, the present invention will be explained in detail with reference to FIG. If there is a font pattern in the input data (1), this includes a corresponding logical character code, and it is necessary to determine the physical character code corresponding to the font memory (4). For this logical character code, the physical character code is uniquely determined in the input order, and the physical character code is written as data to the address of the conversion table (2) indicated by the logical character code, and at the same time, the inverse conversion indicated by the physical character code is performed. Write the logical character code as data to the address in table (6). The above operations are repeated for each font pattern data. On the other hand, if there is a logical character code for output data in the input data (1), the conversion table (
2) to obtain the physical character code and store it in the page buffer (8
) and are managed and stored on a page-by-page basis. Next, if the data read from the page buffer (3) is a font pattern, the font pattern is stored at the address of the font memory (4) indicated by the physical character code. If it is a physical character code for output data, give this as an address to the font memory (4) to obtain the corresponding font pattern, and send this to the print output unit (
5) and print it on the paper.

During the series of operations from registration of the conversion table (2) to completion of writing to the font memory (4), an error occurs, making it impossible to continue the operation, and the data in the page buffer (8) is If a situation arises that requires disposal, the following steps will be taken: If a font pattern is included in the page buffer, it will be discarded before being written into the font memory (4), so the physical character code registration in the conversion table (2) will become invalid and it will be necessary to cancel it. At this time, by giving the physical character code to the address of the inverse conversion table (6), the logical character code that is its contents can be obtained, and the registration of the conversion table (2) can be canceled. If there is no font pattern in the page buffer (8), there is no need to cancel the registration of the conversion table (2).

〔Effect of the invention〕

As described above, according to the present invention, since the inverse conversion table is configured to perform recovery when an error occurs, it is possible to obtain an easy-to-use and highly accurate device at a low cost.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the present invention, and FIG. 2 is a block diagram showing a conventional printer device. In the figure, (1) is the input data, (2) is the conversion table, (
8) is the page buffer, (4) is the font memory, (5)
) c Print output section, (6) is an inverse conversion table.

Claims (1)

[Claims] Print data sent from a host computer, magnetic tape device, etc. has a function to convert logical character codes in font patterns into physical character codes, and has a memory that stores this physical character code and font pattern, and each character By providing an inverse conversion table for converting physical character codes to logical character codes in a printer device that has a memory for storing font patterns in units and a foreign character processing mechanism that prints out characters that are not resident internally. ,
A printer device characterized in that a normal state of the device is guaranteed through recovery processing after an abnormality occurs.