JPS584431A - Controlling system of kanji (chinese character) printer - Google Patents

Abstract

PURPOSE:To increase the system efficiency, by forming a character generator (CG) with an RAM and performing the storage and reading of a CG pattern via a segment register. CONSTITUTION:A main body device 1 sets the initial value to a segment register 7 and at the same time sets other necessary information to a printer control circuit. Then the data to be written into an RAM6 for CG is fed by a byte and then written into the storing place of the RAM6 which is designated by an address generated from a segment register 7. When the printing is carried out, the print data equivalent to a line is stored in an RAM5 for work. After this, the print data in the RAM5 is read out by a piece, and the corresponding pattern is read out of the CG or the RAM6 for CG of a control storage 4 to be fed to a priting head.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a control system for a Kanji printer which includes a one-character generator 'tRAM-' and a segment register tube for accessing the one-character generator RAM.

Traditionally, the control system for kanji printers has been to have a buffer for only one line in the control circuit, and each time a kanji character is printed, the print data Φbatta = - is specified from the main body, and 1
There is also a method for converting this =- code for the 0M1'lO print pattern and outputting the print pattern t*V from the CGMROM at the 9th address. However.

In the former, the print data must be transmitted from the main body each time printing is performed, and the transmission time required for each transmission becomes extremely hot, which poses a problem in terms of system efficiency.In addition, in the latter, It is expensive in terms of cost and also requires ROM.
However, the disadvantage is that the pattern can be easily changed, and there are restrictions on the types of characters that can be printed.◎If the CG becomes large and requires a capacity exceeding, for example, 64KV, addressing can be done using the conventional method. In view of the above-mentioned problems, the present invention provides a control method for a kanji printer that is configured with a RAM with a CGv control circuit and that can realize a large capacity CG memory. ◎For this purpose, the control system of the Kanji 1 printer of the present invention includes a printer control circuit mainly configured with a Kanji printer mechanism section and a microprocessor Y that controls the Kanji printer mechanism st'. , a main unit, an interface circuit for controlling data transfer between the main unit and the printer control circuit, and a plurality of segments for storing kanji dot patterns for - characters in the Data Fist system. The character generator RAMK is provided with a segment register into which data on the data bus is input and which supplies the character generator RAMK as an output data sound address. Hereinafter, the present invention will be explained with reference to the t@ side.

FIG. 1 is a block diagram of one embodiment of the present invention.

In the figure, 1 is the main unit, 2 is an interface circuit, 3 is a microprocessor, 4 is a control memory, 5 is RAM for work, 6 is RAM for CG, 7 is a segment register, 8 and 9 are decoders, 10 is an input boat, 11 is an output boat, 12 is a driver circuit, 13 is a mechanical mechanism 11s
, 14 indicates an OR circuit, and 15 indicates a selector t.

The main device 1 sends print data and control data to the printer control circuit. The interface control circuit 2 controls data transfer between the printer control circuit and the main device 1. Interface circuit 2tli, which can set control data in registers and memory of the printer control circuit according to instructions from the main unit 0Printer control circuit 1 Main unit 1. Interface circuit 2. and a portion excluding the mechanical mechanism section 13. Microprocessor 3 companies 1 For example, 8-bit microprocessors, which execute various calculations according to programs stored in control memory 4, have CGs for alphanumeric characters and kana characters in the control memory. It is being Work RAM
5 is for storing temporary data o CG
j@RAM 6 stores one pattern of kanji character dots. Kanji - Character pattern is 24X24
Represented by a dot.

The segment register 7 generates an address for the CG RAM 6. This address has been continued. Decoder 8 category A V reply information meeting decoding To
9. If the address information specifies a segment register, the 0 decoder 9 line sends a data set signal to the segment register 7, decodes the address information, and sends a decoded signal to the manual boat 10 or output capo). Send to 11. The driver circuit n is a mechanical mechanism s
The output of an oOR circuit 140 for amplifying the signal sent to 13 or the signal sent from mechanical mechanism 1113 is connected to the set terminal of segment register 70, and its input terminal is connected to decoder 8 and interface circuit 1111cI.
It is ill.

The 2nd wA indicates the one-line print data tube sent from the main unit 1.oABC indicates that the following data is an alphanumeric character 4L< indicates that it is a kana code, and 8C indicates the following data. is a segment address.
Figure 3 shows the storage status of the Kanji CG pattern in the CG RAM5. The pattern is filled with sum dots, and therefore requires 72 bytes of space to store the Kanji-character dot pattern. This 72 paise area is called a tube segment.

Next, the operation sounds of the embodiment shown in FIG. 1 will be explained. CG RAM6
In order to store a kanji dot pattern in , the following operations are performed. The main device 111 is.

In addition to setting an initial value in the segment register 7, other necessary information (such as information indicating that pattern data writing will fail) is set in the printer control circuit.

Then, when the data to be written to the CG RAM 6 is sent one byte at a time, the data is transferred to the segment register 7.
is specified by the address generated by , and written to the 4CG RAM 60 storage location. 1 byte of data is CG RA
The address information output from segment register 7 is updated every time it is written to M6. Although not shown, the segment register 7 has an internal 72-base counter. A predetermined number of kanji CG patterns are stored in CG RAM 6.
At the 9th point in time, the ThRAM can be used as CG.

When printing with a printing tube, first, one line of printing data as shown in Fig. 2 is stored in the work RAM 5. After that, when a print start command is received, the corresponding program in the control memory 4 is executed and the work is printed. The print data in the RAM 5 is read out one by one. 0 If the read print data is an alphanumeric code or a kana code, C of the control memory 4 is read out.
When the corresponding character dot pattern is read out from G and the print data read out from RAM 5 for 0 work sent to the print head is a segment address, this segment O address is sent to the segment tube register 7.
, and the first 1-byte column element of the corresponding Kanji CG pattern is read out from the CG RAM 6 as well.

A segment is created each time a 1-byte column element is read.
The address output by register 7 is incremented by 1. When all column elements belonging to the same kanji CG pattern are read out, the next print data is read out from the CG RAM 6.

As is clear from the above description, according to the present invention, Resha, CG
tRAM, and even if the address of this CG RAM exceeds the range 1 that can be specified by a microprocessor, etc.
It is possible to store and read CG patterns through segment registers.It is configured with CGtRAM and can realize a large capacity CG memory within the range specified by segment registers, improving system efficiency. It is also possible to provide an excellent control method for kanji printers.

[Brief explanation of the drawing]

Fig. 1 shows the configuration A of a control device for a kanji printer showing Embodiment 1 of the present invention, Fig. 2 shows a print data tube for one line in the data buffer, and 3wA shows a segment and CG RAM.
It is a diagram showing a corresponding tube. 1...Main device i1.2...Interface circuit%
3... Microphone processor, 4... ROM for storing micro good ram, 5... RAM for work, 6...-C
G711RAM, 7-...Segment-Register, 8 and 9...Ato f No. Patent Applicant Niezak Electronic Industry Co., Ltd. Representative Patent Attorney Yotsu Kyotani 1 Outside Person

Claims (1)

[Claims] In an Elpuri system comprising a kanji printer mechanism section and a microphone Q processor that controls the wrinkled kanji printer mechanism section and an interface circuit that controls the configuration,
A character generator RAM having a plurality of segments for storing one character's worth of kanji dot patterns, and a segment for supplying the character generator RAMK with output data as an address when 〒-〒 on the f-ta path is input.・Control system for kanji printer using register and