JPH05241712A - Data input controller - Google Patents

Abstract

PURPOSE:To attain the simultaneous connection of plural keyboard devices and furthermore to put together the keyboard interruption processings into a single processing in order to secure the effective use of a memory. CONSTITUTION:A keyboard interruption control part 4 receives the interruption signals from the keyboards 6 and 7 where the data are inputted and then performs the interruption control. A keyboard identification control part 5 receives the identification signals from both keyboards 6 and 7 and identifies the keyboard where the date are inputted. Then a main processor 2 receives the identification information from the part 5 and processes the input data.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a keyboard data input control device, and more particularly to a data input device to which a plurality of keyboards can be connected.

[0002]

2. Description of the Related Art As a keyboard device as an input means connected to a data input device, various keyboard devices are usually used mainly from the viewpoint of operability. For example,
Although a general-purpose JIS standard keyboard is suitable for non-standard processing work, the number of function keys for the standard processing work is small, and the number of keys is insufficient to handle necessary processing items. Speaking extremely, the routine process requires a keyboard device having only function keys and ten keys.

Further, conventionally, when it is desired to use a different keyboard device to perform another job during processing work by a dedicated keyboard device, the keyboard is replaced or used, or two keyboards are connected. Two interrupt processes were performed.

[0004]

Among the above-mentioned conventional methods, the method of replacing the keyboard not only takes time until the start of other work, but also the replacement is troublesome.
In addition, the method of connecting two keyboards has a drawback that two interrupt control units are required and two overlapping interrupt processes are required, so that the main memory cannot be effectively used.

[0005]

A data input control device according to the present invention receives an interrupt signal from a keyboard to which data is input, interrupt control means for performing interrupt control, and an identification signal from the keyboard to receive the data. And a processing means for receiving the identification information from the identifying means and processing the input data.

[0006]

The present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of a data input control device according to the present invention, which includes a main memory 1, a main processor 2, an interrupt control unit 3, a keyboard interrupt control unit 4, a keyboard identification control unit 5, and a first unit. Second keyboards 6 and 7 are provided.

The main memory 1 stores keyboard control information and processing programs corresponding to the connected keyboard device 6 or 7. The keyboard control information is a keyboard data code conversion table, which is an information table for converting data read from the keyboard device into data that can be internally processed. The keyboard control information is information for setting the information corresponding to each keyboard device in the main memory according to the keyboard type obtained at the time of keyboard device hardware initialization after the power is turned on.

Next, the operation of the data input control device shown in FIG. 1 will be described. For example, in the case of data input from the keyboard 6, when the key is pressed, a data generation signal is generated from the keyboard 6 and the keyboard interrupt control unit 4 is notified of the input. The keyboard interrupt control unit 4 takes the logical sum of the data generation signals from the keyboard 6 and the keyboard 7 and notifies the main processor 2 via the interrupt control unit 3 that data has been generated from the keyboard device. At the same time, the data generation signal is held in the keyboard identification control unit 5 as keyboard identification data. The keyboard identification data is held by the keyboard identification control unit 5 until the generated data from the keyboard device is read. The main processor recognizes the keyboard interrupt and starts keyboard interrupt processing.

FIG. 2 is a flow chart conceptually showing the flow of keyboard interrupt processing. In the keyboard interrupt processing, a keyboard interrupt factor identification signal from the keyboard identification control unit 5 is fetched to identify that data has been generated from the keyboard 6. Data is read from the keyboard 6 by keyboard interrupt processing, and the keyboard 6
Stored in the generated data storage area. After that, it is converted into data that can be internally processed by the keyboard control information corresponding to the keyboard 6.

When data is generated from the keyboard 7 during the above process, the same process is performed for the keyboard 7, the generated data is stored in each keyboard generated data storage area, and the process corresponding to the keyboard device is performed.

By providing the keyboard interrupt control unit 4 and the keyboard identification control unit 5, two keyboard devices can be connected.

[0012]

As described above, according to the present invention, by adding a keyboard interrupt control unit and a keyboard identification control unit to a normal data input device, a plurality of keyboard devices can be connected at the same time. But there is an effect that data can be entered. Furthermore, by combining the keyboard interrupt processing into one, the memory can be effectively used.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a data input control device according to the present invention.

FIG. 2 is a flowchart showing a flow of operations of the present invention.

[Explanation of symbols]

 1 Main Memory 2 Main Processor 3 Interrupt Control Unit 4 Keyboard Interrupt Control Unit 5 Keyboard Identification Control Unit 6, 7 Keyboard

Claims (1)

[Claims] 1. An interrupt control unit that receives an interrupt signal from a keyboard to which data is input and performs interrupt control, and an identification unit that receives an identification signal from the keyboard and identifies a keyboard to which the data is input. A data input control device comprising: a processing unit that receives the identification information from the identification unit and processes the input data.