JPS6044668B2 - Kanji display device control method - Google Patents

Description

Detailed Description of the Invention The present invention provides a method for controlling a kanji display device in which a plurality of kanji display devices and/or kanji printing devices (represented by a kanji display device in this specification) are controlled by one control device. Regarding the method.

Recently, demand for kanji display devices has increased significantly, and the range of applications has expanded from proofreading and editing of newspapers, etc. to data entry using kanji characters.

Naturally, the equipment used has changed from expensive, large-scale equipment to low-cost, small-sized equipment. In order to reduce the cost of the control method for such a small kanji display device,
Multiple devices are controlled by one control device.
Conventionally, according to a control method in which multiple kanji display devices are controlled by one control device, each kanji display device has a large capacity, for example, 10,000 kanji CG (including JIS level 1, level 2, etc.). Because it had a built-in character generator, it was expensive and large, but recently it has become possible to use
It has a built-in kanji CG for 00 characters, and if it is necessary to display a kanji that does not exist in this kanji CG, a character pattern that is sent by requesting a pattern to the control device is sent to a separately prepared character pattern register. is temporarily stored and displayed.

However, if the kanji CG is further miniaturized, the kanji C
The display of kanji that does not exist in G increases, and therefore character pattern registers must be added, and as a result,
There was a problem in that there was a limit to the reduction in price and size of the entire Kanji display device. The purpose of the present invention is to reduce the storage capacity of the kanji CG to the necessary minimum (for example, 480 kanji characters that can be displayed on one screen) based on the concept of registering the kanji patterns currently used in screen display in the kanji CG.
In addition, the present invention eliminates the need for a character pattern register for temporarily storing characters, thereby reducing the cost and size of the kanji display device and helping to solve the above-mentioned problems of the conventional type.

The present invention will be explained below with reference to the drawings. FIG. 1 is a block circuit diagram showing a control method of a conventional kanji display device.

In FIG. 1, a control device 1 includes a plurality of kanji display devices 2-
1, 2-2, ..., 2-n. Each kanji display device includes a control section 21, a floppy disk 22 as a CG of external characters, a display section 23, an input device 24, and the like. However, the numbers 2-n particularly illustrate the Kanji printing device, and therefore, the difference is that the printing section 25 is provided instead of the display section 23 and the input device 24 is not provided, and the other points are the same. Usually, in a kanji display device, the character patterns of kanji are stored in the floppy disk 22, and the control section 21 has a built-in high-speed CG consisting of an IC memory. however,
The number of kanji characters that can be used is as large as 10,000, for example, and therefore the capacity of CG for kanji characters is large, and the device is therefore expensive. In contrast, recently, in order to reduce the capacity of kanji CG on kanji display devices, kanji CGs for frequently used kanji characters, for example, 200 kanji characters, are provided, and when displaying kanji characters that do not exist in the kanji CG, There is a device that requests a character pattern from a control device and temporarily stores the transmitted character pattern in a character pattern register, but as described above, there is a limit to the reduction in cost and size. According to the present invention, only the kanji patterns currently used for screen display are registered in the kanji CG of the kanji display device,
Conversely, it is possible to cancel the registration of character patterns of kanji that are not currently used in screen display, so the maximum number of kanji characters stored in the kanji CG is the number of characters required for one screen display, for example 480 characters, and 96 characters is sufficient. It is.

FIG. 2 is a block circuit diagram showing a control system for a kanji display device as an embodiment of the present invention.

In FIG. 2, elements that are the same as those in FIG. 1 are given the same reference numerals. That is, the control device 1 uses high-speed kanji CGll as a character pattern storage means.
and an external CGl2, and each kanji display device 2-1 on the other hand
, 2-2, . . . , 2-n, there is no external CG 22, and only a high-speed kanji CG (not shown) built into the control unit 21 is provided. Further, there is no character pattern register for temporarily storing character patterns. FIG. 3 is a block circuit diagram of the kanji display device of FIG. 2.

In FIG. 3, 31 is a receiving buffer, and 32 is a decoder for determining whether an external code, such as a JIS code, of a written message is a Kanji code or an alphanumeric code. Reference characters 33, 34, and 35 surrounded by X are a Kanji external code table, a Kanji internal code table, and a display flag memory for storing Kanji codes, respectively, and have the same address. 36 is a conversion table for converting an alphanumeric external code into an internal code.

Reference numeral 37 is a screen memory for storing internal codes of Chinese characters and alphanumeric characters. Reference numeral 38 is a Kanji CG whose address is the internal code of the Kanji internal code table 34.

Therefore, the number of character patterns stored in the kanji CG 38 is the number of kanji internal codes, for example 960. 39 is alphanumeric C
G in the conversion table 36. The internal code is used as the address.

40 is a screen buffer that stores bit patterns of characters actually displayed on the screen.

In the present invention, the kanji external code transferred from the control device 1 is converted into an internal code by registering it in the kanji external code table 33, and the character pattern corresponding to the kanji external code is is transferred from the high-speed CGll of the control device 1 or the external CGl2. Character pattern request table 4 makes such transfer requests.
It is 1. In Figure 3, Kanji internal code table 3
4. The alphanumeric external/internal code conversion table 36 and the alphanumeric CG 39 store fixed constants, and are therefore constructed of, for example, a ROM.

On the other hand, external code table 33 and display flag memory 35
, screen memory 37, Kansai G38, screen buffer 40,
The character pattern request table 41 stores variable constants, and is therefore constructed of, for example, RAM. Third
In the figure, an external code table 33 for kanji, an internal code table 34, a display flag memory 35, and a kanji C
The number of addresses of G38 is the kanji equivalent of screen memory 37 (96
(0 characters) is the same as the number of addresses.

However, in reality, the former number of addresses does not necessarily need to match the latter number of addresses. 4A to 4D show the storage contents of each block in FIG. 3, and FIG. 5 is a flowchart for explaining the circuit operation of FIG. 3.

The operation of the circuit shown in FIG. 3 will be explained with reference to FIGS. 4A to 4D and FIG. 5. In advance, Kanji internal code table 34
As shown in Figure 4A, the internal code of 9 marks “゜8
000゛, "800r゛, ..., ゜゜83BF゛" (display display) is stored, and this internal code is shown in Figure 4B.
As shown, it is the address of kanji CG38.
In this case, the first 4 bits of the internal code “゜1000(
=8) ゛ is for identifying it from an alphanumeric internal code. Furthermore, although the Kanji CG 38 stores a character pattern of 24×24 dots (72 bytes) in each area, nothing is stored at the time of initial setting. Therefore, in this case,
All the flags in the display flag memory 35 are "0". In a certain state, when a Kanji external code is received by the reception buffer 31 from the control device 1 (FIG. 2) (FIG. 5,
Step #1), the decoder 32 searches whether this Kanji external code is registered in the external code table 33 (Step #2).

For example, if the Kanji external code is ゜゜D5F'6゛, it is registered in the area of address 0004゛ as shown in Figure 4A, so the internal code ゜゜''8002'' in the internal code table 34 corresponding to this area is registered.゛ is the value of the pointer (not shown) of the receive buffer 31, for example “゜0000
According to ゛, as shown in FIG.
3, #7).

On the other hand, if the kanji external code, for example "B3C4", is not registered, the display flag memory 35 is searched to detect an empty area (step #4). As shown in FIG. 4A,
Since the display flag of address '0002' is '0', the external code 'B3C4' is registered in the external code table 33 (step #5), and the corresponding internal code '8' is registered.
00F'' is set in the character pattern request memory 41 together with the external code ゜゜B3C4゛ (step #6). In this case, the value in the counter area CA indicating the number of codes requesting a character pattern is counted up. Next, the internal code '4800r3 is written to the area of address "0002" of the screen memory 37 as shown in FIG. 4A in accordance with the value of the pointer of the reception buffer 31, for example "0002" (step #7). Next, the screen memory 37 pointer (not shown) and the receive buffer 31 pointer are set to +
2 up (step #8).

That is, this is because a kanji character corresponds to two alphanumeric characters. Next, check whether one screen of external code (96 kanji characters, 192 alphanumeric characters) received by the reception buffer 31 has been completed, that is, whether the pointer of the reception buffer 31 has returned to ゜“0000゛”. It is determined whether or not (step #9).

Here, if NO, the process returns to step #1.゜゜YE
If S', proceed to step #10. Step #10
, the external code stored in the character pattern request table 41 is sent to the control device 1 (FIG. 2) to request a character pattern, and the character pattern obtained is
Write the corresponding internal code in the area of Kanji CG38, which is the address.

Further, in step #4, if there is no free area, that is, if all the flags in the display flag memory 35 are ゜゜1゛, all the display flags are set to ゜゜0.
(Step #12).

Next, the screen memory 37 and internal code table 34 are searched to reset the flag (step #13).
That is, in this case, the display flag corresponding to the internal code that is not stored in the screen memory 37 is kept at "0". Therefore, in the next step #5, the external code will be registered. Normally, as shown in FIG.
If it supports address 5, all display flags will be “
It is extremely rare for it to be 1. Note that in this case, the display flag memory 37 has been refreshed together with the screen memory 37. Regarding alphanumeric characters, all characters that can be used are stored in the alphanumeric CG 39 as dot patterns, so the operation is the same as in the conventional case.

As explained above, according to the present invention, since the kanji currently used for screen display are registered and the registration of kanji that are no longer in use is canceled, the capacity of the kanji CG is limited to the maximum number of characters equivalent to one screen, e.g. 960 characters, therefore, compared to the conventional type, the capacity of the kanji CG can be significantly reduced, and a character pattern register for temporary storage can also be eliminated. The device can be made lower in price and smaller in size, and is useful for solving the problems of the conventional type described above.

[Brief explanation of the drawing]

FIG. 1 is a block circuit diagram showing a control method of a conventional kanji display device, FIG. 2 is a block circuit diagram showing a control method of a kanji display device as an embodiment of the present invention, and FIG. 3 is a block circuit diagram showing a control method of a conventional kanji display device. A block circuit diagram of the kanji display device, FIGS. 4A to 4D are diagrams showing examples of the memory contents of each block in FIG. 3, and FIG. 5 is a flowchart for explaining the operation of the circuit in FIG. 3. 1...control device, 2-1, 2-2,..., 2-n
... Kanji display device, 33 ... Kanji external code table (memory), 34 ... Kanji internal code table (memory), 35 ... Display flag memory , 36... Alphanumeric external/internal code conversion table (memory), 37... Screen memory,
38...Kanji CGl39...Alphanumeric CGl
4l...Character pattern request table (memory)
.

Claims (1)

[Scope of Claims] 1. In a control method for a kanji display device in which a plurality of kanji display devices are controlled by one control device, each kanji display device has a kanji CG whose address is a kanji internal code;
An alphanumeric CG whose address is an alphanumeric internal code, a screen memory that stores the kanji or alphanumeric internal code displayed on the screen, a kanji external code memory for registering a kanji external code, and a corresponding kanji external code memory. a kanji internal code memory that stores the kanji internal code of the kanji CG corresponding to the address of , and a flag that corresponds to the code of the kanji internal code memory and indicates whether or not the kanji corresponding to the kanji internal code is currently displayed. a display flag memory for storing a character pattern, and a character pattern request memory for storing a Kanji external code for requesting the control device to transfer a character pattern, and the control device comprises a character pattern storage means. , if the Kanji external code received from the control device has been registered in the Kanji external code memory, the corresponding Kanji internal code is written to the designated area of the screen memory; on the other hand, if the Kanji external code has not been registered, the corresponding Kanji internal code is written in the display flag memory. is registered in the free area of the kanji external code memory according to the contents of the character pattern request memory, and also sets the corresponding kanji external code in the character pattern request memory and sets a corresponding display flag, and then according to the contents of the character pattern request memory. A control method for a kanji display device, characterized in that the character pattern is transferred from the character pattern storage means of the control device to the kanji CG. 2. When there is no free area in the kanji external code memory, clear all flags in the display flag memory, and then clear each flag in the display flag memory by searching the kanji internal code memory and screen memory. A control method according to claim 1, which is rewritten. 3. The control method according to claim 1, wherein the number of addresses of the Kanji internal code memory, Kanji external code memory, and display flag memory is the same as the number of addresses of the screen memory.