JPS5838174A - Dot printer - Google Patents

Abstract

PURPOSE:To speed up the reading of data by a method in which needles in each row are arranged for each of data to be printed and the data are stored in a dot printer having plural needle arranged in two rows. CONSTITUTION:In plural needles arranged in two rows, needles (N1)(N3)...(N15) and (N0)(N2)...(N14) in left and right-handed rows are alternately and vertically arranged one dot apart. Also, the timing of printing is biased by as much as the interval (for 3 dots) of the needles in left and right-handed rows. At this time, by arranging all of data in the left row from No.2000 place on the one hand and also data in the right-handed row from No.2010 place, the fetching of data is made easier. Furthermore, by arranging data by biasing them by as much as 3 bits in advance, the timing of 3 bits can be easily taken.

Description

[Detailed description of the invention] The present invention relates to a dot printer.

Conventional dot printers convert text patterns as they are into bit patterns. For example, in the case of the character pattern shown in Figure 1, they convert them as they are into bit patterns as shown in Figures 1 and 2, and then store them in ROM (read only memory). etc., and is used as a character generator. Here, we assumed a printer with one row of needles, but now there are many dot printers with two rows of needles, such as 16-pin, 18-pin, and 24-pin printers.

However, in the case of a dot printer with two rows of needles, for example, the character pattern shown in Figure 16 is converted directly into a bit pattern as shown in Figure 4, and the bit pattern is stored in a ROM etc. every 8 bits as shown in Figure 5. Even if you write, you cannot print it as is. In the case of two rows of needles, the left and right rows of needles (N,) (N,) --- (N, 5), (
N, ) (N2) --- (N, 4) are arranged alternately every other dot in the vertical direction, so the data printed by the needles in the left and right rows is like the white circles and black circles in Figure 6. every other dot in the vertical direction. Further, the timing of printing is also shifted by the distance between the left and right needles (S dot).

For this reason, conventionally, the written character generator data as shown in Figure 5 is read out and converted when printed. That is, as shown in the off-line diagram, first the address counter is set to the first address 1000Kt of the character generator, the data (8 bits) at that address is read out, and the even and odd bits of the data are sorted. Next, count up the address counter, read out the data (8 pits) at that address, and sort the data into even and odd bits. Here, even number bits and odd number bits are combined to create 8-bit data, and after printing it, the address counter is counted up and the address counter reaches 101.
Similar processing is repeated until address 9 is reached.

With Tonoyo 5K, the conventional method requires extra program processing to separate the read data into even and odd bits and combine them with the even and odd bits, so faster printing speeds can be expected. There was no problem.

In particular, in dot printers with needles of 2 rows and 16 bins or more, which have become mainstream in recent years, it is an extremely important issue to read and print character generator data as quickly as possible in order to improve printing speed. .

SUMMARY OF THE INVENTION An object of the present invention is to provide a dot printer in which the reading speed of the character generator is improved by proper arrangement of the character generator, and a sufficient printing speed can be obtained.

Therefore, in the present invention, in a dot printer having a plurality of needles arranged in two rows in a direction perpendicular to the printing direction, data of a character generator for printing characters is summarized for each data to be printed by each row of needles. , the above object is achieved by storing the data of each column in the order in which they are printed.

Hereinafter, the present invention will be explained according to examples.

What is shown here is a memory map in which the character generator is applied to the actual ROM (M,)K. This is 1. ? The bit pattern of one character in Figure 4 is expressed by needles (N) (N) --- (N, , ), 1M (N,) (N,) --- (N, 4) in the left and right columns, respectively. The data to be printed are grouped together and the data in each column is stored in the order in which they are to be printed. That is, 2
From address 000 to address 200C, the needle in the right column (
N, ) (N,) --- (N, 4) arranges in order the data from the first column to the first ink column (the data indicated by the white circle in Figure 6) to be printed, 20 from 2010 Honji
By address 1C, the needle in the left column (N,) (N,) −
--(N1.) arranges in order the data from the first column to the fifteenth column (data indicated by black circles in Figure 2) to be printed. Addresses 200D to 200F are empty addresses. If arranged like this, the needles (N) (N) --- (N, 4) 2 in the right column can be read out in order from 2000 Honji and printed as is, and the needles in the left column Needle (N
, ) (N,) --- (N1.), the needles in the right row (N Just read out the data and print it as is.
,)---(N,4) ,(N1)(N,)---(
N4. ) is a collection of data to be printed, and the data of the needles JL in each column are arranged so as to be shifted from each other by a reading interval corresponding to the interval between the needles. That is, the needle (N,) (N,) --- (N, 4) in the right column places the print data from 6000 Honchi to address 500C, and the needle data in the left column from 5016 Honchi to address 601F. Needle (N,) (N,) ---(N,
- places the data to be printed, and 300D between them
The data from the street address to 6012 Homachi is "ooooooooo".If you arrange it like this, you can use the needles in the right column (No. ) (N,) ---(N
, 4) Data Haru000 @oooooooo1'
″, left row needle (N,) (Ns) ---(N,,
) data can be easily obtained quickly by mechanically counting up addresses, such as 2010 Honchi's 1"00 oooooo".

In addition, in the above explanation, 2 rows of 16 pins were explained.
The present invention is also applicable to, for example, 2 rows of 18 bins, 2 rows of 24 bins, etc.

According to the present invention, the data of the character generator for printing characters is stored for each data to be printed by the needles in each row (collectively, the data of each row is stored in the order in which they are printed, so that the data is stored when printing. The data can be read out and printed as is, and therefore, the printing speed can be improved by improving the reading speed of the print data.

[Brief explanation of the drawing]

Figure 1 is an explanatory diagram showing a character pattern printed by a dot printer with one row of needles, Figure 2 is a diagram showing character patterns printed by a dot printer with one row of needles.
An explanatory diagram showing the conversion of the character pattern shown in the figure into a bit pattern;
Figure 4 is an explanatory diagram that converts the character pattern of Figure 6 into a pit pattern, and Figure 5 is an explanatory diagram of the pit pattern of Figure 4 converted into a pit pattern.
The memory map written in M, Figure 6 is an explanatory diagram showing the arrangement relationship of the two rows of needles, Figure 7 is the flowchart for printing the character generator of Figure 5, ? 8
The figure is a memory map of a ROM showing the arrangement of character generators according to one embodiment of the present invention, and Figure 9 is a memory map of a ROM showing the arrangement of character generators according to another embodiment of the present invention.
This is a memory map of OM. (NORI(N,)(N,) ---One(N,,)...Needle, (M,) (M,)...ROM as a data storage unit. August 31, 1980 Inventor Previous Motoki Kawa Patent applicant Tokyo Electric Co., Ltd.

Claims (1)

[Scope of Claims] (11) In a dot printer having a plurality of needles arranged in two rows in a direction perpendicular to the printing direction, each needle in each row can generate data of a character generator for printing characters for each data to be printed. A dot printer characterized in that the data of each column is stored in a data storage section of a character generator in the order of printing. (2) The data of each column is stored in the data corresponding to the spacing between the needle columns The dot printer according to item 1 of the specification, characterized in that the reading interval of the storage section is shifted and stored.