JPS6341163A - Printing apparatus - Google Patents

Abstract

PURPOSE:To provide a self-diagnostic function by increasing the capacity of a storing place for storing the type face, kind or data of a character, by providing an external memory apparatus storing a program for the practice control of a microprocessor. CONSTITUTION:A printer main body 1 is equipped with an internal memory 11 and a decoding processing part 12, and the address bus 13 from the microprocessor in the printer main body 1 is connected to the internal memory 11 and the decoding processing part 12. When an external memory apparatus 3 is inserted from a slot 2, the external memory apparatus 3 is connected to the internal memory 11 by a data bus 15 and also connected to the decoding processing part 12 by an address bus 14. The internal memory 11 is directly accessible through the microprocessor and the address bus 13 and the external memory apparatus 3 is indirectly accessible to the microprocessor through the decoding processing part 12. The external memory apparatus 3 is made freely detachable and the capacity of a storing place for storing the type face, kind or data of a character is increased to make it possible to provide a self- diagnostic function.

Description

TECHNICAL FIELD The present invention relates to printing devices, and more particularly to printing devices having a microprocessor.

Previously, in this type of 8-print printer, the storage capacity (hereinafter referred to as "memory size") of the storage device inside the printer was fixed, and the user of the printer could increase the memory size. was impossible.

In such conventional printing devices, the memory size was fixed, so from the perspective of the printing device user, the fonts and types of characters that could be printed were limited, and the data sent from higher-level devices such as computer equipment was limited. The disadvantage is that the capacity of the storage space for storing the data received is limited.

In addition, because the printing 1tll tll program occupies most of this memory size, the self-diagnosis function used for maintenance of the printing device is insufficient, and work such as creating test equipment for clinics is required. There were drawbacks.

Purpose of the Invention The present invention has been made in order to eliminate the above-mentioned drawbacks of the conventional technology, and is capable of increasing the font and type of characters, as well as the capacity of the storage area for storing data, and providing a self-diagnosis function. The purpose is to provide a printing device that can

Structure of the Invention A printing device according to the present invention is a printing device having a microprocessor, and is characterized in that an external storage device storing a program for controlling execution of the microprocessor is detachable.

Embodiment Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view of an embodiment of the present invention. In the figure, a printing device main body 1 is provided with a slot 2, and an external storage device 3 is inserted into this slot 2 as necessary.
Alternatively, the memory size of the printer main body 1 can be increased by handling it.

FIG. 2 is a block diagram showing one embodiment of the present invention. In the figure, the printing device main body 1 includes an internal memory 11 and a decoding processing section 12, and the internal memory 11 and the decoding processing section 12 are connected to a microprocessor (
An address bus 13 from (not shown) is connected.

When external storage 8113 is inserted through slot 2, external storage device 3 and internal memory 11 are connected via data bus 15, and external storage device 3 and decode processing unit 12 are connected via address bus 14.

Internal memory 11 is connected to the microprocessor and address bus 1
The external storage device 3 can be directly accessed via the microprocessor 3, and the external storage device 3 can be indirectly accessed by the microprocessor via the decoding processing section 12.

When an address signal from the microprocessor is input to the decode processing section 12 via the address bus 13, the decode processing section 12 decodes this address signal and sends it to the external storage device 3. Access device 3. Data read from the external storage device 3 is transferred to the internal memory 1 via the data bus 15.
1, and as a result, the processing target of the microprocessor shifts to the program stored in the external storage device 3.

By storing information such as different fonts and types of characters, self-diagnosis functions, reception buffers, etc. in the external storage device 3, it becomes possible to perform various processes that could not be realized in the past.

In this way, by making the external storage device 3 that stores information according to the purpose of use removable from the printing device main body 1, it is possible to change the font of characters, the type of characters, or the capacity of the storage location for storing data. can be increased and a self-diagnosis function can be provided.

As explained above, according to the present invention, by making the external storage device that stores information according to the purpose of use removable, it is possible to store the fonts of characters, types of characters, or data. This has the advantage that it is possible to increase the capacity of the storage space and provide a printing device that can be provided with a self-diagnosis function.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an embodiment of the invention, and FIG. 2 is a block diagram showing an embodiment of the invention. Explanation of symbols of main parts 1...Printing device body 2...Slot 3...External storage device

Claims (1)

[Claims] 1. A printing device having a microprocessor, characterized in that an external storage device storing a program for controlling execution of the microprocessor is detachable.