JP2000090043A - Peripheral equipment detecting method of computer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent malfunction due to erroneous setting by using a connecting device in common as an input terminal connected to peripheral equipment having a different function and detecting the kind of the connected peripheral equipment with the signal outputted from the computer side. SOLUTION: A main body 3 is provided with the connecting device 6, which makes input/output terminals 6a to 6n to function and which also connects those input/output terminals 6a to 6n to signal terminals 5a to 5n provided to a control part 5. The connecting device 6 is used in common as a connecting device which connects peripheral equipment having a different function, and unused terminals are made present depending upon the connected peripheral device. Namely, the input/output terminals 6a to 6n of the connecting device 6 are connected to input/output terminals 12a to 12n of the connecting device 12 provided to the peripheral equipment 11. Consequently, malfunction due to erroneous setting can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for detecting the type of a peripheral device connected to a computer.

[0002]

2. Description of the Related Art Electronic devices called personal computers have become widespread, and such computers are provided with input / output terminals to which peripheral devices provided outside are connected. Such peripheral devices include a floppy disk device and a hard disk device, and it is impossible to provide a connection terminal on the main body of the computer for each peripheral device having such different functions.

[0003]

SUMMARY OF THE INVENTION In a computer, a peripheral device is connected to a peripheral device connection terminal provided on a main body, and the computer recognizes the type of the peripheral device even when the computer is energized in such a state. If you can't
Peripheral devices cannot be operated normally. In order to solve such a problem, it is necessary to change the setting of the program in accordance with the peripheral device in the setup, which may cause a serious problem that a malfunction due to an incorrect setting occurs.

An object of the present invention is to provide a computer peripheral device detection method which solves the above problem.

[0005]

According to the present invention, the connection device is also used as an input / output terminal to which peripheral devices having different functions are connected, and the type of the connected peripheral device is detected by a signal output from the computer. is there.

[0006]

FIG. 1 is a block circuit diagram showing a computer on which the present invention is implemented. In FIG. 1, reference numeral 1 denotes a keyboard for inputting data, and 2 denotes an arithmetic processing circuit for performing an arithmetic processing operation based on data input from the keyboard 1, and is incorporated in a main body 3 constituting a computer. Reference numeral 4 denotes a display unit for displaying the calculation result of the arithmetic processing circuit 2 and the like.

Reference numeral 6 denotes a connection device provided on the main body 3 and provided with a plurality of input / output terminals 6a to 6n. The input / output terminals 6a to 6n Connected to terminals 5a to 5n. In such a configuration, the connection device 6 is also used as a connection device to which peripheral devices having different functions are connected, and unused terminals exist depending on the connected peripheral devices.

Reference numeral 7 denotes a pull-up resistor connected between the signal terminal 5a of the control unit 5, ie, the input / output terminal 6a of the control unit 5 and the power supply, and 8 denotes a drain connected to the signal terminal 5n of the control unit 5. An electric field type transistor which is connected to a power supply via a resistor 9 and has a source grounded, and has a gate connected to an input / output terminal 6n of the connection device 6 and a pull-down resistor 10 Grounded.

Reference numeral 11 denotes a peripheral device which is used by being connected to a computer. Reference numeral 12 denotes a connection device provided in the peripheral device 11, and input / output terminals 6a to 6n of the connection device 6.
Are provided with signal input / output terminals 12a to 12n. A control signal path 13 connects the signal input / output terminal 12a and the signal input / output terminal 12n.
Only one is provided. That is, the peripheral device 1
This is not provided for a peripheral device having a function different from that of the first device.

The present invention is configured as described above, and the operation will be described next. First, a case where the illustrated device is used as a peripheral device will be described. When the peripheral device 11 is connected to the main body 3, the input / output terminals 6 a to 6 n provided on the connection device 6 are connected to the signal input / output terminals 12 a to 12 n provided on the connection device 12. The number of signal input / output terminals provided on the peripheral device 11 and the number of input / output terminals provided on the main body 3 do not match.

When the power is turned on in such a state, an operation of detecting the type of the peripheral device connected to the main body 3 is performed by the setup program stored in the storage device of the arithmetic processing circuit 2. When a peripheral device detection operation is performed, an H (high) level signal for detection is output from a signal terminal 5 a provided in the control unit 5. Such detection signals are input / output terminal 6a of connection device 6, signal input / output terminal 12a of connection device 12, control signal path 13, connection device 12
Signal input / output terminal 12n of the connection device 6
n is applied to the gate of the field effect transistor 8 via n. As a result, the field effect transistor 8 is turned on, and the signal terminal 5n of the control unit 5 is grounded, so that an L (low) level signal is input to the signal terminal 5n.

When an L-level signal is input to the signal terminal 5n of the control unit 5, the signal is input to the arithmetic processing circuit 2 through the control unit 5, and the type of the peripheral device 11 is detected by the operation of the arithmetic processing circuit 2. Is detected. After the detection operation is performed, the processing operation as a computer by the arithmetic processing circuit 2 is performed.

The detection operation when the illustrated peripheral device 11 is connected to the main body 3 is performed as described above. Next, the operation when another peripheral device having a different function is connected will be described.

When such a peripheral device is connected, the control signal path 13 incorporated in the peripheral device 11 is not incorporated. Therefore, in such a state, even if an H-level signal for detection is output from the signal terminal 5 a provided in the control unit 5, the signal is not applied to the gate of the field effect transistor 8. As a result, the field effect transistor 8 is turned off, and the signal terminal 5n of the control unit 5 is not grounded, so that the H level signal is input to the signal terminal 5n of the control unit 5. .

When an H-level signal is input to the signal terminal 5n of the control unit 5, the signal is input to the arithmetic processing circuit 2 through the control unit 5, and the type of the peripheral device is determined by the detection operation by the arithmetic processing circuit 2. Is detected. After the detection operation is performed, the processing operation as a computer by the arithmetic processing circuit 2 is performed.

As described above, the peripheral device detection operation of the present invention is performed. When the peripheral device 11 is connected and a low-level signal is output to the signal terminal 5a of the control unit 5,
The state where the L-level signal is applied to the gate of the field effect transistor 8 is set. Therefore, the signal terminal 5n of the control unit 5
To a state where an H-level signal is input. Therefore, in a state where the peripheral device 11 is connected, the operation of detecting the type of the peripheral device 11 and the operation of detecting the presence or absence of connection can be performed by switching the level of the signal output to the signal terminal 5a of the control unit 5. .

Further, when the main body 3 is operating as a computer, the selection operation of the peripheral device cannot be performed by holding the state in which the signal of the L level is output to the signal terminal 5a of the control section 5. You can do it. That is, by making it impossible to perform the connection operation of the peripheral device while the power is supplied to the computer, it is possible to avoid the operation abnormal operation caused by the switching of the peripheral device.

[0018]

According to the present invention, the type of the peripheral device connected to the main body can be detected by the signal output from the computer side, that is, without using the signal from the peripheral device. So that
The detection operation can be performed accurately.

Further, according to the present invention, the type of peripheral device can be detected by using an unused terminal among a plurality of input / output terminals, so that a special connection cable or the like is separately produced. No need.

According to the present invention, not only the type of peripheral device is detected by a signal output from the computer,
Since the presence or absence of the connection of the device is detected, it has an effect of contributing to the enhancement of the functions of the computer.

[Brief description of the drawings]

FIG. 1 is a block circuit diagram showing a computer on which the present invention is implemented.

[Explanation of symbols]

 2 arithmetic processing circuit 5 control unit 8 field effect transistor 13 control signal path

Claims (3)

[Claims] In a computer provided with a connection device comprising a plurality of input / output terminals connected to an external peripheral device on a main body, said connection device is used as an input / output terminal shared by peripheral devices having different functions. A method for detecting a peripheral device of a computer, wherein the type of the peripheral device to be used and connected is detected by a signal output from the computer. 2. The peripheral device detection method according to claim 1, wherein the type of the peripheral device is detected by using an unused terminal of the input / output terminal provided in the connection device. 3. The peripheral device detection method according to claim 1, wherein the presence / absence of connection of the peripheral device is detected based on a detection signal output from the computer.