KR19990080369A - Computer with mouse lock function and control method - Google Patents

Abstract

The present invention relates to a computer having a mouse locking function and a control method thereof, and more particularly, to a mouse locking function having a function of simultaneously locking a mouse together with a keyboard locking function in a computer having only a keyboard locking function when performing a key locking function. The computer has a control method and a method of controlling the same. In the method of locking a mouse using a key lock device, when the key is locked to the key lock device, the input / output controller blocks the SMI while blocking the electrical signal corresponding to the keyboard scan code input from the keyboard. The controller recognizes the SMI and sends a mouse lock command to the I / O controller in the SMI handler so that the I / O controller performs the mouse lock function and the SMI generation polarity is set to high so that the SMI occurs when the key lock function is released. do.

Description

Computer with mouse lock function and control method

The present invention relates to a computer having a mouse locking function and a control method thereof, and more particularly, to a mouse locking function having a function of simultaneously locking a mouse together with a keyboard locking function in a computer having only a keyboard locking function when performing a key locking function. It has a computer and a control method thereof.

An operating system is a program that acts as an interface between a computer user and computer hardware, and the purpose is to create an environment for the user to execute the program. Therefore, the main purpose of the operating system is to make the computer convenient to use, and the secondary purpose is to make efficient use of the computer hardware.

In terms of operating systems, text-based operating systems, such as DOS, receive keystrokes from the keyboard, while operating systems such as Windows, which are currently used on computers, provide a graphical user interface (GUI) environment for the keyboard. It works by receiving most inputs using the mouse rather than by key input.

On the other hand, the BIOS (Basic Input Output System) is a basic input / output control program that depends on the hardware configuration of the computer operating system. The basic input / output device functions provided by the BIOS include data input / output through a keyboard, screen data input / output using a video card, There are printer output, data input / output function using serial communication, and disk control function. Some of these BIOS functions are hardware generated, but most are provided via software interrupts. In other words, when a BIOS needs a function in DOS, Windows, or a user program, a software interrupt of the corresponding function is generated to temporarily call the BIOS function, which is called a BIOS call.

Here, the operation principle of the keyboard will be briefly explained.

There is a microcomputer inside the keyboard, and its role is to scan the keyboard continuously to see which key is pressed, and if there is a key pressed, it finds the code corresponding to the pressed key and sends it to the computer. Such a test of whether a microcomputer in a keyboard has a pressed key is called a scan. Here, the microcomputer receives the keyboard scan code and converts it to the code to be sent to the computer. The newly converted code is called a system scan code. These system scan codes are stored in a first in first out buffer in the keyboard until the computer can receive data from the keyboard. Here, the system scan code stored in the FIFO buffer is sent to the computer in serial form. At this time, the computer has a dedicated chip for receiving system scan codes from the keyboard and managing data to be sent to the keyboard. This is called a keyboard controller. This keyboard controller receives the system scan code sent by the keyboard's microcomputer. Here, the keyboard controller contains a program called a keyboard bios, and data communication between the computer and the keyboard is performed by the keyboard controller and a program inside. In addition, the keyboard controller receives the system scan code sent by the keyboard and delivers it to the main BIOS for the entire computer, which is converted into actual code. Thus, the key pressed on the keyboard undergoes three stages of conversion in order to generate code for the computer. The first stage is the keyboard scan code generated by checking the electrical connection, the second stage is the system scan code for delivery to the main BIOS, and the third stage is the code to operate as the actual code.

Hereinafter, an operation of a security device through a keyboard lock function in a conventional computer will be described with reference to the drawings.

1 is a plan view of a computer having a conventional keyboard locking function, which is a main body 20, a key lock 22 on the front of the main body 20, a key 30 inserted into the key lock 22, and a keyboard 24. Has

2 is a block diagram of a computer having a conventional keyboard locking function, in which a host bus is interfaced with the central processing unit 50, the cache memory 51 and the system memory 53 through the control of the first bridge chip 52. The PCI bus 55 is connected to various PCI devices 55, and the second PC chip 54 is connected to the ISA bus. . Here, the second bridge chip 54 controls the hard disk 56, the CD-ROM 58, and the USB 57, as well as a role of connecting the PC-I bus and the I-A bus. In addition, a BIOS 59 and an input / output controller 60 are connected to the Isa bus, and the input / output controller 60 has a floppy disk 62, a serial / parallel port 63, an infrared port 64, and a keyboard 24. Or a peripheral device such as a mouse 28 is connected. Accordingly, the input / output controller 60 controls the peripheral device by embedding various controllers for controlling the input / output of the peripheral device such as the keyboard controller 61 and the floppy disk controller.

3 is a flowchart illustrating a control method of a computer having a conventional keyboard locking function.

In a conventional computer, the keyboard lock function is performed in two ways.

The first method uses a key lock device 22, which has a key lock device 22 on the front of the main body 20, and inserts the key 30 into the key lock device 22 to lock the keyboard (①). The microcomputer of 24 cuts off the electrical connection of the first step for transmitting the keyboard scan code to the keyboard controller 61 embedded in the input / output controller 60 of the main body 20, thereby pressing the key button 26 of the keyboard 24. The keyboard scan code is prevented from being generated, and the key 30 of the keyboard 24 is restored by restoring the electrical connection of the first step by releasing the lock by inserting the key 30 into the key lock device 22. (26) It is possible to generate a keyboard scan code by input.

The second method uses a keyboard having a key having a key lock function, and the keyboard 24 has a key button 25 that functions as a key lock function.

When the key button 25 having the key lock function on the keyboard 24 is input to perform the key lock function, the microcomputer embedded in the keyboard 24 inputs the keyboard scan code corresponding to the pressed key button 25 to the input / output controller. Transfer to keyboard controller 61 built in 60 (2). Here, the keyboard controller 61 in the input / output controller 60 converts the received keyboard scan code into a system scan code for transferring to the main BIOS 59, and the input / output controller 60 converts the converted code into a key lock function. If applicable, the keyboard lock function is performed (③), thereby preventing the input of the key button 26 input to the keyboard 24.

Next, when the key button 25 having the key lock function in the keyboard 24 is inputted to release the key lock function, the microcomputer embedded in the keyboard 24 causes the keyboard scan code corresponding to the pressed key button 25 to be pressed. To the keyboard controller 61 built in the input / output controller 60 (2). Here, the keyboard controller 61 in the input / output controller 60 converts the received keyboard scan code into a system scan code for transferring to the main BIOS 59, and the input / output controller 60 converts the converted code into a key lock function. If applicable, the keyboard is unlocked (③), and then the key button 26 inputted to the keyboard 24 is performed.

Looking at the flow chart of the above two methods of locking the keyboard, it is determined whether the user has locked the key using the key lock device 22 or the key lock key button 25 of the keyboard 24 during the use of the computer (S100), When the user performs the key lock using the key lock 22, the keyboard 24 cuts off an electrical signal connected to the keyboard controller 61 in the input / output controller 60, and the user presses a key on the keyboard 24. When the key lock is performed by using the lock key button 25, the keyboard scan 61 in the input / output controller 60 that receives the keyboard scan code corresponding to the key lock key button 25 is converted by the system scan code. The input / output controller 60 performs the keyboard locking, thereby preventing the input of the key button 26 by the keyboard 24 (S104).

In step S104, it is determined whether the user releases the key lock again by using the key lock device 22 or the key button 25 on the keyboard 24, and the user uses the key lock device 22 When unlocking the key, the keyboard 24 reconnects an electrical signal to the keyboard controller 61 in the input / output controller 60 and the user locks the key using the key lock key button 25 on the keyboard 24. In the case of releasing the lock, the input / output controller 60 releases the keyboard lock by the system scan code converted by the keyboard controller 61 in the input / output controller 60 that receives the keyboard scan code corresponding to the key lock key button 25. Input of the key button 26 by the keyboard 24 is performed (S104).

At present, the specification of the hungry computer includes a key lock device, which prevents the computer user from using the computer unnecessarily for security purposes. However, in the case of a personal computer, when using a text-based operating system such as DOS, since the main input means is the keyboard, locking the keyboard sufficiently performs a supplementary function. However, in an operating system under a GUI environment such as Windows, most inputs are performed using the mouse rather than the keyboard. Perform. Therefore, the conventional keyboard locking device or a complementary function using a keyboard having a key locking function is not applied to an input to a mouse.

Accordingly, an object of the present invention is to provide a computer having a mouse lock function and a method of controlling the same, in which a mouse lock function is simultaneously performed when a key lock function is performed to solve the conventional problem.

1 is a plan view of a computer having a conventional keyboard locking function.

2 is a block diagram of a computer having a conventional keyboard locking function.

3 is a flowchart illustrating a control method of a computer having a conventional keyboard locking function.

4 is a block diagram of a computer having a mouse locking function according to an embodiment of the present invention.

5 is a flowchart illustrating a control method of a computer having a mouse locking function according to an embodiment of the present invention.

As a means for achieving the above object, the operation of the present invention,

When the user requests the key lock function, the key lock function locks the keyboard and the mouse. If the user requests the key unlock function during the key lock state, the keyboard lock and the mouse lock are released. Input is possible using the mouse.

Here, in the method of locking a mouse by using a key lock device, when the key is locked to the key lock device, the input / output controller generates a system management interrupt (SMI) while blocking an electrical signal corresponding to the keyboard scan code input from the keyboard. The controller recognizes the SMI and sends a mouse lock command to the I / O controller from the system management interrupt handler. The I / O controller performs the mouse lock function and sets the SMI generated polarity to a high state. SMI occurs when the lock is released.

In addition, in the method of releasing the mouse lock by the key lock device, when the key is inserted into the key lock device, the input / output controller generates the SMI while reconnecting the electrical signal corresponding to the keyboard scan code input from the keyboard, and the controller controls the SMI. SMI handler sends a mouse unlock command to the I / O controller so that the I / O controller performs the mouse unlock function and sets the SMI generation polarity to low so that SMI occurs when the key lock function is executed. .

In addition, in the mouse locking method using the key button with the key lock function on the keyboard, when the key button with the key lock function on the keyboard is input, the keyboard controller receives the keyboard scan code and converts it into a system scan code and analyzes it. One I / O controller generates SMI, and the controller recognizes the SMI interrupt and sends the mouse lock command from the SMI handler to the I / O controller. The I / O controller performs the mouse lock function and sets the SMI generation polarity to high to lock the key. SMI is generated when release of.

In addition, in the method of releasing a mouse using a key button having a key lock function on the keyboard, when the computer enters a key button having a key lock function on the keyboard while the computer is locked, the keyboard controller receives a keyboard scan code and scans the system. After converting the code, the I / O controller generates SMI, and the controller recognizes the SMI interrupt and sends the mouse unlock command from the SMI handler to the I / O controller so that the I / O controller performs the mouse unlock function. To low so that SMI occurs when the key lock function is performed.

By the above configuration, the configuration and operation of the most preferred embodiment that can easily implement the present invention will be described in detail with reference to the accompanying drawings.

Figure 4 is a block diagram of a computer having a mouse lock function according to an embodiment of the present invention, Figure 5 is a flow chart showing a control method of a computer having a mouse lock function according to an embodiment of the present invention.

Here, the mouse locking method by the key locking function will be described as two embodiments.

In the first embodiment, the key lock device 22 is used to lock the keyboard 24 and the mouse 28. The key lock device 22 is provided on the front of the main body 20. It is determined whether to perform the key lock function (S302). At this time, when the user inserts the key 30 into the key lock device 22 and locks it (1), the microcomputer of the keyboard 24 scans the keyboard to the keyboard controller 81 embedded in the input / output controller 80 of the main body 20. The electrical connection of the first stage for transmitting the code is cut off. At the same time, the input / output controller 80 generates an SMI to recognize that the central processing unit 70 performs the key lock function (④, S304). The central processing unit 70 that recognizes the SMI in step S304 drives the SMI handler program in the BIOS 79 (⑤), and the SMI handler program transmits a mouse locking command to the input / output controller 80 ( ⑥). At this time, the SMI handler program transmits a mouse lock command and sets a register indicating the SMI generation polarity to high, so that SMI can be received again when the key lock function is released (S306). Next, the input / output controller 80 receiving the mouse locking command performs the mouse locking function (⑦, S308). Accordingly, by locking the key by locking the key lock device 22, the mouse lock function is performed along with the keyboard lock function to prevent input by the keyboard or the mouse.

After the step S308, it is determined whether the user releases the key lock function again (S310), and when the user releases the key lock function by releasing the key by inserting the key into the key lock device 22 (ⓛ), the keyboard 24 The microcomputer reconnects the electrical signal of the first step for transmitting the keyboard scan code to the keyboard controller 81 embedded in the input / output controller 80 of the main body 20, and at the same time, the input / output controller 80 generates an SMI. The key lock release function is recognized (④, S312). The central processing unit 70 that recognizes the SMI in step S312 drives the SMI handler program in the BIOS 79 (⑤), and the SMI handler program transmits a mouse unlock command to the input / output controller 80. (⑥). At this time, the SMI handler program transmits a mouse unlock command, and then sets a register indicating the SMI generation polarity to low so that the SMI handler can receive the SMI again when the key lock function is performed (S314). Next, the input / output controller receiving the mouse lock command performs the mouse lock release function (⑦, S316). Accordingly, by inserting a key into the key lock device 22, the mouse lock function is released together with the keyboard lock function to receive an input by the keyboard 24 or the mouse 28 (S318).

The reason for changing the register indicating the SMI generation polarity to high and low is to determine whether the key lock function or the key unlock function is performed when the SMI is generated. By setting the register high, SMI will be generated when the keyboard and mouse are locked.

In the second embodiment, the mouse 28 is locked by using the keyboard 24 having the key button 25 having the key locking function, and it is determined whether the user performs the key locking function (S302). When the user inputs the key button 25 having the key lock function on the keyboard 24 to perform the key lock function, the microcomputer embedded in the keyboard 24 receives the keyboard scan code corresponding to the pressed key button 25. Transfer to keyboard controller 81 built in input / output controller 80 (2). Here, the keyboard controller 81 in the input / output controller 80 converts the received keyboard scan code into a system scan code for transferring to the main BIOS 79, and the input / output controller 80 converts the converted code into a key lock function. If applicable, perform the keyboard lock function (③) and generate SMI at the same time (④, S304), and the central processing unit 70 that recognizes the SMI drives the SMI handler program in the BIOS 79 (⑤), and the SMI handler. The program transmits a mouse lock command to the input / output controller 80 (6). At this time, the SMI handler program transmits a mouse lock command and sets a register indicating the SMI generation polarity to high, so that SMI can be received again when the key lock function is released (S306). Next, the input / output controller 80 receiving the mouse locking command performs the mouse locking function (⑦, S308). Therefore, by pressing the key button 25 having the key lock function of the keyboard 24, the mouse lock function is also performed along with the keyboard lock function to prevent input by the keyboard or the mouse.

After the step S308, it is determined whether the user releases the key lock function again (S310), and when the user inputs the key button 25 having the key lock function on the keyboard 24 to release the key lock function, The microcomputer embedded in the keyboard 24 transmits the keyboard scan code corresponding to the pressed key button 25 to the keyboard controller 81 embedded in the input / output controller 80 (2). Here, the keyboard controller 81 in the input / output controller 80 converts the received keyboard scan code into a system scan code for transferring to the main BIOS 79, and the input / output controller 80 converts the converted code into a key unlocking function. If it corresponds to the keyboard unlocking function (③) and at the same time generates the SMI to recognize that the central processing unit performs the key unlocking function (④, S312). The central processing unit 70 that recognizes the SMI in step S312 drives the SMI handler program in the BIOS 79 (⑤), and the SMI handler program transmits a mouse unlock command to the input / output controller 80. (⑥). At this time, the SMI handler program transmits a mouse unlock command, and then sets a register indicating the SMI generation polarity to low so that the SMI handler can receive the SMI again when the key lock function is performed (S314). Next, the input / output controller 80 receiving the mouse unlock command performs a mouse unlock function (⑦, 316). Accordingly, by pressing the key button 25 having the key lock function, the mouse lock function is released together with the keyboard lock function to receive an input by the keyboard or the mouse (S318).

As described above, according to the present invention, in the case of a GUI operating system using a mouse, illegal access of important information and data from unauthorized users by locking not only the keyboard but also the mouse together when using the key lock function for security. There is an effect that can prevent.

Claims (2)

An input device for outputting a key lock request signal and a key unlock signal by a user; An input / output controller that outputs an SMI corresponding to the key lock request signal when receiving a key lock request signal from the input device, and outputs an SMI corresponding to the key unlock signal when receiving a key lock release signal from the input device; Receiving the SMI signal of the input / output controller, if the SMI is generated by the key lock request signal, performs a locking function of a mouse together with a locking function of the input device, and the SMI is generated by the key unlocking signal. And a control unit for performing a lock release function of the mouse together with a lock release function of the input device. Determining whether to perform a key lock function; When the key lock function is performed in this step, the electrical signal corresponding to the keyboard scan code input from the keyboard is blocked and an SMI corresponding to the key lock function is generated, and the controller receiving the SMI inputs a mouse lock command to the input / output controller. Setting the SMI generation polarity to a first state so that the input / output controller performs a mouse lock function and outputs an SMI corresponding to a key unlock function; Determining whether to perform the key unlocking function again in the step; When the key unlocking function is performed in this step, the electrical signal corresponding to the keyboard scan code input from the keyboard is reconnected and the SMI corresponding to the key unlocking function is generated. Transmits a lock release command to the input / output controller to cause the input / output controller to release the mouse lock function as the keyboard lock function, and outputs the SMI corresponding to the key lock signal to output the SMI to the first state. And setting the second state to have a second polarity opposite to that of the control panel.