JPS6235931A - Input buffer control 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] [Summary] In an input buffer control method in which an input buffer is provided and a received code from a keyboard input device is stored, an application processing unit that processes data and the input buffer As an interface with the read command processing unit for retrieving the code stored in the code, an instruction means using a specific code clear and read command is provided.
When there is an instruction from the instruction means, the read/command processing section erases only a predetermined specific code in the input buffer, and prevents processing related to function keys from being performed unnecessarily. Two methods for controlling the buffer are disclosed.

[Industrial application field]

The present invention can be applied to, for example, a Japanese word processor.

A human cover control method for controlling received codes from a keyboard input device in a personal computer, etc., and in particular, selectively erasing specific codes such as function keys from an input buffer.

This invention relates to an input buffer control method that allows processing to be executed only on necessary codes.

[Conventional technology and problems]

In early keyboard input control systems, if the key input time was faster than the key processing time, missing input characters could occur. Therefore, now generally by providing an input buffer.

Many input buffer control methods are employed in which a code input from a keyboard input device is stored in an input buffer independently of various applied processes for single-character codes.

However, in the conventional input buffer control method, all codes are written in a large buffer, so even key codes that are difficult to remember are accumulated in the input buffer. There was a problem with being exposed.

For example, in a Japanese word processor or the like, processing such as "primary page key" requires a lot of processing time because it involves scrolling on the display screen. During this time,
The "next page key" or the like may be pressed redundantly, resulting in the processing of the "next page key" being executed more than necessary. Therefore,
The contents of the input buffer are completely cleared every time a process related to a function key such as "next page key" is executed, but in this case, it is important to remember the general character key Key codes such as , etc. will also be erased from the input buffer, requiring you to press the key again.

Means for Solving Problem C] The present invention aims to solve the above problems and distinguishes between key codes (generally character keys, etc.) that must be memorized and keys and codes that are not.
A means is provided for distinguishing between codes (function keys, etc.) and selectively erasing only key codes that are inconvenient to memorize.

FIG. 1 shows a basic configuration diagram of the present invention.

In FIG. 1, 10 is a keyboard input device.

11 is a scan code register that supplies a scan signal; 12 is a key matrix consisting of a matrix of key switches; and 13 is an input control that scans the key matrix 12 and sends information regarding the output to the main body processing device side. 14 is a keystroke detection unit that detects keystrokes, 15 is a code sending unit that sends out an input key code, 16 is a main body system processing unit having a central processing unit and a main memory, and 17 is a code 18 is an input buffer that stores the received code; 19 is a read command processing unit that delivers input characters to the application processing unit; 20 corresponds to a key code. For example, a code conversion table that stores 2-byte JIS codes.

21 is a code conversion unit that converts a key code into a character code such as a JIS code; 22 is a specific code clearing unit that erases a specific code such as a predetermined function key from the input buffer 18; and 23 is an input cover/nofa 18. an input buffer clear section that erases all codes stored in the 2
4 is an application processing unit that performs various data processing on input character codes;

25 is a specific code clear and read command that instructs to input characters after selectively erasing only the specific code in the input buffer 18; 26 is a character code read by the read command processing unit 19; represents the read buffer that is set.

The input control unit 13 controls sending the pressed key code to the main body processing device 16 under, for example, microprocessor control. The reception processing section 17 is activated by two interrupts and stores the received key code in the input buffer 18. The input buffer 18 is F I F O (
Writing/reading of code/data is performed by First In First Out), and is managed by, for example, a storage pointer and a read pointer, and used cyclically.

The read command processing section I9 processes commands from the application processing section 24 that require key human power. In the case of the present invention, in addition to the two normal read commands and clear and read commands, a specific code clear and read command 25 is provided. When the command 25 is issued, the specific code clear section 22 is activated, and the specific code clear section 22 erases a predetermined code such as a function key in the input buffer 18.

In addition, clear and read command (not shown)
is issued, the input buffer clear unit 23 is activated, a process of erasing all codes stored in the input buffer on the first day is performed, and then a read process is executed.

[Effect]

According to the invention, by issuing a specific code clear and read command 25.

A specific code clearing unit 22 selectively erases only a predetermined specific code from the input buffer 18. Therefore, it becomes possible to manually create only the necessary character codes.

〔Example〕

FIG. 2 is an explanatory diagram of one embodiment of processing of parts related to the present invention;
FIG. 3 is an explanatory diagram of the command format.

When the application processing unit 24 shown in FIG. 1 issues a specific code clear and read command 25, the read command processing unit 19 is activated.

The read command processing section 19 executes the processing shown in FIG. The following process numbers - [phase] correspond to the process numbers shown in FIG.

■ Determine whether clearing of a specific code is specified based on the detailed type code of the command parameter.

If not specified, control is transferred to another process. Other processing can be considered to be the same as the conventional one, so a description of the processing contents will be omitted.

■ Determine whether the large hippo sofa 18 is empty. For example, when the contents of a storage pointer and a read pointer (not shown) match, it is determined that the two-person sofa 18 is empty.

■ When the input buffer 18 is not empty, retrieve the code from the input buffer 18 according to the read pointer.

Thereafter, the read pointer is advanced by one.

■ The code conversion table 20 is created by the code conversion unit 21.
1, for example, a 7-bit key code is converted into a 2-byte character code such as a JIS code.

■ Determine whether it is a predetermined specific code. Information regarding whether or not the code is a specific code is obtained using the code conversion table 20, for example.

Obtained from the result of converting to character code. When the first byte of the converted character code is (00)+6, it is determined that it is a specific code to be erased.

(2) When the code taken out from the input buffer 18 is a specific code, that code is rejected, control is returned to process (2), and the same process is repeated for the secondary code.

■ If it is not a specific code, go to the read buffer 26 specified by the command parameter.

Set character code. Incidentally, before this process (2), the selection and deletion of specific codes by processes (2) and (2) may be performed for all codes of the input sofa 18.

(2) If the input buffer 18 is empty, i1m performs the same process as the usual read process. First, it waits for a code to be received from the keyboard input device 10.

(2) If a code is set in the input buffer 18 by receiving the code, the code is taken out from the input buffer 18.

[Phase] Convert the retrieved key code to a character code and execute the process after process ■.

The parameters of the command issued by the application processing section 24 are two, for example, as shown in FIG.

In the command parameter 30, the command type field stores a predetermined keyboard read command code that requests input from the keyboard input device 10. For example, if the peripheral device is a printer, this field contains the printer write command.
The code will be stored.

The details ii field is a field in which command modifier information is set. In the case of this embodiment, three types of command details related to the keyboard input device 10 are prepared.

If the detailed type is “01”, it is a normal read command, and if it is “02”, it is a clear and read command that instructs to clear the entire input buffer 18 before executing the read process. .

"03" indicates a specific code clear and read command according to the present invention.

in the read buffer address field.

The address of the read buffer 26, which is a storage area for character codes specified by the application processing unit 24, is set.

In the second embodiment, in the case of the specific code clear and read command 25, the specific code can be uniquely selected based on the information registered in the code conversion table 20.

For example, the type of specific code to be erased may be specified in the command parameter 30.

〔Effect of the invention〕

As explained above, according to the present invention, key codes that should be remembered in the input buffer are distinguished from key codes that are inconvenient to remember, and only the latter key codes are selectively erased. Because I can.

The processing load on the application processing section is reduced and the operability is improved.

[Brief explanation of the drawing]

FIG. 1 is a basic configuration diagram of the present invention, FIG. 2 is an explanatory diagram of one embodiment of processing of a portion related to the present invention, and FIG. 3 is an explanatory diagram of a command format. In the figure, 10 is a keyboard input device, 13 is an input control unit,
16 is a main body processing unit, 17 is a reception processing unit, 18 is an input buffer, 19 is a read command processing unit, 22 is a specific code clear unit, 25 is a specific code clear and
Lead command. 26 represents a read buffer. Patent Applicant: Fujitsu Ltd. Representative Patent Attorney Hiroshi Mori (1 other person) Hiroshi Q. ■

Claims (1)

[Claims] A keyboard input device (10) and a reception processing unit (10) that receives a code sent from the keyboard input device (10).
17), an input buffer (18) for storing the code received by the reception processing section (17), an application processing section (24) for processing data, and an input buffer (18) for storing the code received by the reception processing section (17); In the input buffer control method including a read command processing section (19) that controls taking out and passing the code from the buffer (18), the application processing section (24) provides the read command processing section (19) with a read command processing section (19). On the other hand, the read command processing unit (19) includes means (25) for instructing to read after erasing a predetermined specific code among the codes stored in the input buffer (18); In response to the instruction from the instruction means (25), the input buffer (18)
An input buffer control system characterized by comprising means (22) for selecting and erasing the specific code from among the codes.