JPS63299950A - Script character pattern generating system of dot printer - Google Patents

Abstract

PURPOSE:To easily and sharply form various script characters to output the same for printing, by using the dot matrix pattern of a prototype to apply logical operation thereto. CONSTITUTION:A master control part 1 reads a control program from a program ROM 2 and outputs an address specifying the dot pattern based on a printing order to a printing ROM 3 through an address bus 6. A script printing pattern P is outputted to a line bus 7 and a printing order is outputted to a printing control part 5. The printing control part 5 takes in the printing pattern P by said printing order to print the same. Herein, 'Am-1XAm=Bn' is at first operated with respect to a dot pattern of Am-line Jn-row to calculate the dot pattern N of the Jn-row to a B1- or Bk-line and, next, 'Bm-1+Bm=Cm/2' is operated on the basis of said dot pattern N to calculate the dot pattern P of the Jn-row to a C1- or Ck-line and this dot pattern P is set to a script printing pattern.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a script character pattern generation method for a dot printer.

[Conventional technology]

When printing script characters, conventional dot matrix printers store script character patterns in memory in addition to normal-sized character patterns in advance.
A method was adopted in which this was printed as the output.

[Problem that the invention seeks to solve]

However, the above conventional example has a drawback in that a large capacity memory is required to print out many types of script characters in advance.

For this reason, in recent years, attempts have been made to use, for example, a script character pattern generated by simply OR-converting a normal-sized tod character pattern every two lines.

However, with such a simple logical sum conversion method, for example, for re in Figure 6 (1), the blank space at the top disappears and "e" cannot be read as shown in Figure 6 (2). There was an essential drawback that .

[Purpose of the invention]

The present invention improves the disadvantages of the conventional example, and provides a dot printer that can extremely easily and clearly form various script characters and print them out without being equipped with a memory for script characters. Its purpose is to provide a script character pattern generation method.

[Means for solving problems]

In the present invention, A7 row and Jn column (however,
m-1,2,3,-,k;n=f,2゜3,...
...+1i and below) dot pattern, first,
``Calculate As-1XAa -Be J, TeB, or 8
Find the dot pattern N of 57 columns for one row, and then
Based on this dot pattern N, "B m-r + B
s''C*/!J is calculated to obtain a 31-column dot pattern P for CI to Ck rows, and this dot pattern P is used as a script printing pattern.Thus, the above-mentioned purpose is achieved. is intended.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIGS. 1 to 5.

The embodiment shown in FIG. 1 includes a mask control section 1, a program memory (program ROM) 2, and a buffer memory (R
AM) 3 and dot matrix pattern memory (print R
OM) 4 and a print control section 5, which are connected via an address bus 6 and a data bus 7.

The mask control unit 1 has a function of controlling the entire printer device, a function of creating fine print data, and a program ROM.
A central processing unit (hereinafter referred to as rcpu) that operates according to a control program written in 2.

). Each component is controlled via an address bus 6 and a data bus 7.

The program ROM 2 contains a program for controlling the entire printer device and a script printing pattern creation program, and outputs control data to the data bus 7 based on commands output from the mask control unit 1 via the address bus 6. It has the function of

The RAM 3 is composed of a buffer memory and has a function of temporarily storing print patterns such as calculation results while the script print pattern creation program is being executed.

The print ROM 4 stores donmatrix print data (normal print) corresponding to designated characters, and has a function of outputting this print data to the data bus 7 under the control of the mask control section 1. ing.

The print control section 5 has the function of inputting print data via the data bus 7 and sending it to a printing section (not shown) to perform dot printing.

Next, a method of program control by the mask control section 1 for forming a script print pattern based on normal print data will be described with reference to FIG.

Now, when a predetermined print command is input from an external device,
The mask control unit 1 reads a control program from the program ROM 2, outputs an address for specifying a dot pattern based on the print command to the print ROM 3 via the address bus 6, and also outputs a read command, and outputs this dot pattern to the data bus 7. output. Next, the mask control section 1 internally imports this dot pattern based on the control program. The dot pattern in Fig. 2 (1) is a pattern of 40 dots in total in rows A = 8 and columns J-5.
A = 1; J-1, is the 1st address, rA = 1゜J-2'' is the 2nd address, rA = 2 i J = IJ is the 6th address, and so on. In this case "7""8"
"9""12""13""14""17""22"
"27""28""29""32""33"
Each address of "34" is a "black" dot, and the others are "white" dots (this pattern is called "M"). This is shown in Figure 2 (1).

Here, the print pattern for line A-0 of pattern M (actually, it is not output from print ROM 3, but is usually a "white" dot) is written as "AOJ", and the print pattern for line A-1 is written as "Ah". J, A = 2 lines of printing pattern r
A2J,...A = 8 lines of code pattern "A"
,” I think.

Next, the inverted patterns “λ.” and “Ao” of pattern M.
A1'' and the logical product is calculated and the result of the operation is stored as 'B+J. Similarly, the AND of "A," and "A2" is calculated, and the result of the calculation is stored as 'Bz J.

Hereinafter, "Bm" is determined in the same way. That is, a new print pattern consisting of "Bm" to "Bll" is calculated based on the logical formula % formula % shown below, and this pattern is stored as "N". This is shown in Figure 2 (2).

Next, the logical sum of "Bl" of pattern N and 'Bz J is calculated, and the result of the operation is stored as "C1". Similarly, calculate the logical sum of “Bm” and “B4” and convert the result to “
C2". Hereinafter, "Ck" is determined in the same way. That is, a new print pattern consisting of "C1" to "C3" is calculated based on the logical formula % formula % shown below, and this pattern is stored as "P". This printing pattern also becomes the script printing pattern of the original printing pattern M. The mask control section 1, shown in FIG. 2(3), outputs a script print pattern P to the data bus 7, and also outputs a print command to the print control section 5 via the address bus 6. Thereby, the print control section 5 takes in the script print pattern P and prints it.

Next, the case where the above embodiment is applied to the letter "e" is shown in FIGS. 3 to 5. In this example, FIG. 3 is a basic pattern M, and FIG. 5 is a print pattern P obtained by converting this basic pattern into a script. In this case, FIG. 4 shows a pattern N in which two dots are not consecutive in the vertical direction (FIG. 2 (b
) is shown.

In this manner, in the above embodiment, the following calculation is performed on the basic pattern M to obtain the script pattern P. The logical formula is shown below.

B, -A,, -Aa (m=1.2, 3....z 16) (N pattern) Cjl/□=B, -, +B.

(m-2R; R=1.2.=, 16) (P pattern) [Effects of the invention] Since the present invention is configured and functions as described above, it is possible to perform this by using the original dot matrix pattern. It is possible to form and output a clear script print pattern by simply performing logical operations on the , and there is no need to memorize the print pattern of script characters in advance as in the past, so there is no need for additional memory for this purpose. It is possible to provide an unprecedented and excellent script printing method for dot printers.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the present invention, FIG. 2 is an explanatory diagram showing the basic configuration of the present invention, and FIGS. 3 to 5 are explanations showing the operation of the embodiment of FIG. 1. Figure, 6th
Figures (1) and (2) are explanatory diagrams showing conventional examples, respectively. 1...Mask control section, 2, 3.4...
Memory, 5...Print control unit. Patent applicant: Japan Electric Co., Ltd. Figure 1 Figure 2 (a) (b)
')(C> Figure 3 (lf dahn l1 IF) Figure 4 Figure 5 Figure 6

Claims (1)

[Claims] (1), row A_m and column J_n stored in memory (however,
m = 1, 2, 3, ..., k; n = 1, 2, 3,
For the dot pattern of . Next, based on this dot pattern N, “B_m_-_
1+B_m=C_m_/_2" to find the dot pattern P of J_n column for C_1 to C_k rows,
A script character pattern generation method for a dot printer characterized in that this dot pattern P is used as a script printing pattern.