JPS61198274A - Character pattern memory system - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a character pattern storage system in a dot printing device.

Conventional technology dot type printing device Kj? The storage format of the character patterns used in the writing process was busy, as shown in Figure S. Namely.

The format was such that the result of performing logical operations on the received code became the first address of the character pattern. The arithmetic processing in this case means that the reception code is X and the first address of the character pattern is A.
Then, A = ('Ic-K)xL+B ・・・・・・−・
(C) Here, K is the minimum value of the reception code X, L is the character pattern data length per character, and B is the start address of the memory.

Problems to be Solved by the Invention In this method, a problem occurs when there is a bug in the code table of the received code. Mushi Kui is reception code X crab 1
In the case of ~2 and ~3~4, the character pattern is defined and B,9. 2 to 5 corresponds to the case where a blank pattern is output (in this case, K2 to 5 are called blank spots). In this case, there are several methods for storing the character pattern in the memory, as shown in FIG.

The first method is to store characters from 1 to 4 as character patterns; in this case, <(Kl-2)XL...
・・・・・・・・・ (ko) will be wasted. In the second method, 5 is not stored from K2 to K2, but this method does not waste memory, but in logical operation processing, the received code It is necessary to check whether 4 I/c is present from 3 to 4. Therefore, the more insect-infested areas there are, the longer the processing time will be.

In addition, in a dot-type printing device, the mode is switched by a switch or control code on the printing device's operation panel, and by switching the mode, the character pattern corresponding to one reception code can be changed to another character pattern, and the character pattern corresponding to a certain reception code can be changed to another character pattern. The corresponding character pattern may remain the same or may be changed. Moreover, this mode switching may be required more than once. This includes, for example, switching between horizontal and vertical writing, supporting several types of code tables on one device,
This is the case when memory is commonly used by printers of different models. In this case, with the method shown in FIG. 3, the memory capacity increases.

The present invention has been made in order to solve the above-mentioned problems inherent in the conventional technology.Therefore, an object of the present invention is to provide a second storage means for storing character patterns, and to To provide a new character pattern storage method which does not take up a storage area for the missing parts and does not increase the processing time by also having a first storage means for storing the data.

Furthermore, another object of the present invention is to provide a control 72 in the data of the first storage means, so that it is possible to distinguish between received codes with different character patterns and received codes with the same character pattern by mode switching. To provide a novel character pattern storage method that does not increase the memory capacity of a first storage means even for at least four types of modes by storing only characters with different patterns in the first storage means. It is in.

Means for Solving the Problems In order to achieve the above object, the character pattern storage method according to the present invention calculates a reception code to become a successive address, and the data read by a readout address is the first address of a character pattern. the first storage means, and the seventh storage means;
and a first storage means in which a character pattern corresponding to the received code is stored between the first address of the character pattern generated by the read data of the storage means and a predetermined data length.

Furthermore, the character pattern storage method according to the present invention is as follows.

The data in the first storage means further includes a control flag so that the first address of the character pattern in the first storage means can be obtained at least once.

Embodiment of the Invention Next, a preferred embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram showing one embodiment of the present invention. In FIG. 1, reference number 1 indicates a received code, 1 indicates a logic operation means, and 1 indicates a result of the logic operation. The logical operation result 1 becomes the leading address of the first storage means 3.

The logical operation is the received code.If the x1 operation result is AI, then AI - (X-K) x LJ/ + B/ --
・−−−−−−= (j). Here, K is the minimum value of the reception code X, L/ is the data length per character in the seventh storage means 3, and B/ is the starting address of the first storage means 3.

Seventh storage means 3 υA/A7 address AI + L/ −
Reads data up to /address and obtains output -. The output - becomes the first memory child ν address information, and the value of the output n is set to A,
If the data length per character in the first storage means 4Z is L, then the data from address A2 to address A+L/in the first storage means DA is.

The character pattern corresponds to the reception code l.

FIG. 2 shows an example of the data format of the first storage means 3. The data consists of a flag area and an address area.

The address area a is used to generate the first address A of the character pattern in the first storage means. The flag area f is used to switch the starting address AJ to the first storage means DA depending on the mode specified by the external device. flag area f
To simplify the explanation, it is assumed that the flag area consists of l bits. The printing device has modes / and motco by mode switching, and in the mode l state, it does not depend on the value of the flag area f.
・・・・・・・・・・・・・・・ (4=), and in the Mortco state, ! If = 0, then A, 2 wa a ・・・・・・・・・・・・・・・
・・・・・・・・・・・・・・・・・・ (If af=/, A+L・・・・・・・・・・・・・・・・・・・
・・・・・・・・・ Assuming that it is processed as (a),
As shown in Figure 3.

In the case where the character pattern is different depending on the mode 1 and the mode 1, as shown in the figure, the first storage means 3 and the first storage means 1
Even if there is a mode, the capacity of the first storage means will not be doubled.

Figure 3 shows that when the received code X is X ==llK5,
Regardless of whether the mode is Mode L or Mortco, a character pattern whose first address of the first storage means DA is Pi is printed, and
=6 indicates that the device operates to print a character pattern starting from PJ in mode 1 and PJ in mode 1.

Figure 3 is a diagram showing specific data for realizing Figure 3. When the flag area f=/, it indicates that two types of character patterns are successively stored in the first storage means. Therefore, if the mode ignores the flag area.

In the case of X=Ks, A=Pt ・・・・−・・・・・・・・・・・・・・・
(7) In the case of X-Kb, refer to Figure 2.
・・・・・・・・・・・・ However, in the case of the mode where the flag area is enabled.

When X=Ks, AJ=Pi ・・・・・・・・・・・・・・・
・・・・・・・・・・・・・・・ (9) In the case of xwKb, AJ; Toko + Lko (=P, 7) ...
...(tO) is the first address.

In this embodiment, the flag area f is
Although it has been explained that it is fixed, by increasing the number of bits in the flag area f, even if several types of printing modes are busy, it can be handled by simply increasing the memory capacity of the first storage means to the minimum necessary. is clear.

Effects of the Invention As explained above, the present invention provides, in addition to character patterns,
By preparing a separate storage means that stores the start address control flag, the capacity can be kept to the minimum necessary.

It becomes possible to use the memory in various modes and in various devices.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention, and FIG.
The figure shows an example of the storage format of the first storage means; FIGS. 3 and 3 show examples of operation when switching modes; FIG. The figure is a diagram of the memorization range showing the disadvantages of the conventional method. l... Reception code, λ... Logical operation means, 3...
First storage means, da... First storage means patent applicant NEC Corporation Representative Patent attorney Yutabe Kumagai 451 Figure 1I2 Figure 113

Claims (2)

[Claims] (1) a first storage means which becomes a readout address by calculating a received code and whose data read by the readout address becomes a character pattern start address, and a character pattern generated from the readout data of the first storage means; 1. A character pattern storage system comprising: second storage means in which a character pattern corresponding to a received code is stored between a leading address and a predetermined data length. (2) A patent further characterized in that a control flag is included in the data in the first storage means so that at least two starting addresses of character patterns in the second storage means can be obtained. A character pattern storage method according to claim (1).