JP2703143B2 - Active insertion / removal method of input / output device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a central processing unit mounted device (hereinafter referred to as a CPU mounted device) and an input / output device (hereinafter referred to as an I / O device).
The present invention relates to an extended I / O adapter and an active insertion / extraction method for an I / O device in a system in which an I / O device is connected via an extended input / output adapter (hereinafter referred to as an extended I / O adapter) or directly.

In recent years, with the demand for utilizing a CPU-mounted device as a system rather than as a single unit, it is often necessary to insert and remove an extended I / O adapter or an I / O device with expansion / reduction of functions. Conventionally, CP
In order to insert / remove the extended I / O adapter or I / O device from / to the U-mounted device, the CPU-mounted device is temporarily terminated, and after the extended I / O adapter or I / O device is inserted / removed, C
Since the device with the PU was started, a considerable amount of time was required. Therefore, there is a demand for active insertion and removal of an extended I / O adapter or an I / O device without taking time and effort when inserting or removing an I / O device.

In the present invention, in order to solve the inconvenience of requiring time and effort for each insertion and removal, a monitoring unit for monitoring the connection state of an I / O device is provided in a device equipped with a CPU.
When the device is inserted or removed, the internal control unit and the extension control unit that are automatically connected are initialized, and the termination process is performed on the removed internal control unit and the extension control unit. Extended I / O to CPU-equipped devices without using
An adapter or an I / O device can be inserted and removed.

[0004]

2. Description of the Related Art FIG. 6 is a diagram showing a conventional structure. The CPU mounted device 1 includes a CPU 11, a memory 12, an internal control unit 13,
The connection unit 14 includes a connection unit 14 with the extended I / O adapter 2 and a connection unit 15 with the I / O device 3, and performs a predetermined process according to a program in the memory 12. The CPU-mounted device initializes the internal control unit and the additional control unit connected at the time of startup. The extension I / O adapter 2 includes an extension control unit 21, a CP
Connection 22 with U-mounted device 1 and connection 2 with I / O device
3 for input / output control of the I / O device.

[0005]

In the configuration shown in FIG. 6, which I / O adapter or I / O device is inserted and removed,
It is unknown whether the O device has been enabled or disabled. For this reason, it is necessary to end the processing once, restart it, and initialize all the connected I / O devices. An object of the present invention is that no operation is required when inserting or removing an expansion I / O adapter or an I / O device.
An object of the present invention is to provide a method for actively inserting and removing an extended I / O or I / O device that can greatly improve the operability of inserting and removing an O adapter or an I / O device.

[0006]

FIG. 1 is a block diagram showing the principle of the present invention. In the figure, as described above, 1 is a CPU mounted device,
2 is an extended I / O adapter, 3 is an I / O device, 16 is an input / output device connection state monitoring unit of the present invention,
And the connection state of the internal control unit 13 and the like. FIG. 2 is a basic processing flowchart of the present invention. In the present invention, when there is a request for insertion / removal of an extended I / O adapter or an I / O device (step 1), first, the contents of the connection state monitoring unit are recorded in the memory A (step 2). Next, extended I /
Active insertion and removal of the O adapter or the I / O device is performed (step 3). Thereafter, the contents of the connection state monitoring unit are recorded in the memory B (step 4), and the connection states of the extension control unit 13 and the internal control unit 21 are detected by comparing the memories A and B, and the information is sent to the CPU. Send it out (step 5). CP
U issues an initialization instruction or an end processing instruction S to the connected or disconnected control units 18 and 21 according to this information.
1 is transmitted and initialized (step 6).

[0007]

FIG. 3 is a block diagram of an embodiment of the present invention, and FIG. 4 is a processing flowchart of the apparatus of FIG. In the figure, 18
Is a power control mode changeover switch. Reference numeral 19 denotes a connection state monitoring unit which stores a program for writing to the memories A and B and comparing the contents of the memories. The power control mode includes a normal mode and a CPU stop mode.
In the stop mode, the memory, the extended I / O adapter and the I / O
Disconnect the connection to the device.

As shown in FIG. 4, when there is a request for insertion / removal of an extended I / O adapter (step 1), the contents of the connection status monitoring unit 3 (record 1, connection status of I / O device before active insertion / removal) are changed. The data is recorded in the memory A (step 2). Next, the power control mode changeover switch 18 is set to the CPU stop mode (step 3), and the extended I / O
The O-adapter is actively inserted and removed (step 4), and the power control mode changeover switch 18 is set to the normal mode (step 5). Then, the contents of the connection state monitoring unit 3 (Record 2, the connection state of the I / O device after hot insertion / removal) are recorded in the memory B (step 6), and the contents of the memories A and B are compared to perform the insertion / removal. Recognize if you have been. Finally, if it is inserted, the control unit of the I / O device is initialized, and if it is removed, processing such as masking an interrupt from the I / O device is performed (step 7).

FIG. 5 is a partial structural view of another embodiment of the present invention. In general, an I / O device does not operate unless it is 5 V, so that a notebook computer that normally operates 3 V operates with memory and I / O.
It is electrically separated from the O device. In this case, in a personal computer operating normally 3v, when accessing an I / O device, it is converted to 5v. In this case, record 1 is taken immediately before activation or at the end of I / O access at 3 v, and record 2 is taken immediately after it is raised to 5 v at the start of I / O access, and record 1 and record 2 are compared. Initialization of the control unit may be performed.

[0010]

As described above, according to the present invention, when the extension I / O adapter and the I / O device are inserted and removed, the CP
The U-mounted device can be inserted / extracted without having to be terminated and restarted. Further, no operation other than insertion / removal is required, and the extended I / O adapter and I / O device can be inserted / extracted from / to the CPU-mounted device. The operability can be significantly improved.

[Brief description of the drawings]

FIG. 1 is a principle configuration diagram of the present invention.

FIG. 2 is a basic processing flowchart of the present invention.

FIG. 3 is a configuration diagram of a main part of one embodiment of the present invention.

FIG. 4 is a processing flowchart of the apparatus in FIG. 3;

FIG. 5 is a partial configuration diagram of another embodiment of the present invention.

FIG. 6 is a configuration diagram of a main part of the related art.

FIG. 7 is a processing flowchart of the apparatus in FIG. 6;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... CPU mounting device 2 ... Expansion I / O adapter 3 ... I / O device 11 ... CPU 12 ... Memory 13 ... Internal control part 14, 15 ... Connection part 16 ... Connection state monitoring part 21 ... Extension control parts 22, 23 ... Connection

Claims (1)

(57) [Claims] A central processing unit (CPU) mounted device, an extended input / output (I / O) adapter, and an input / output device (I / O) connected to the central processing unit mounted device or the extended input / output adapter. In the system configured, the central processing unit-mounted device includes a memory A and a memory B for recording a connection state, and a connection state monitoring unit (19) for monitoring a connection state between the input / output device and the central processing unit-mounted device. )
And an internal control unit (18). The expansion input / output adapter includes an extension control unit (21). When a user requests insertion / removal of the expansion input / output adapter or the input / output device, the connection state monitoring is performed. The current connection state of the input / output device, which is the content of the input / output device, is recorded in the memory A, the active insertion / removal of the input / output device is performed. The input / output connection state is recorded in the memory B, the memory A and the memory B are compared, the connection state is detected based on the comparison result, the connected control unit is initialized, and the removed control unit A method for hot insertion and removal of an input / output device, wherein a termination process is performed.