JPS62114052A - State information collecting system for input/output device - Google Patents

Abstract

PURPOSE:To display information for showing the latest state of an input/output device, on a console by an instruction from the console, by providing a storage part for storing a state of the input/output device at every input/output device, in an input/output control device. CONSTITUTION:The input/output control device 43 has an input/output state storage area for storing all states of an input/output device to be connected, sends and receives a data by controlling an input/output device 5 or 6, and also stores a state of the input/output device 5 and 6 in the input/output state storage area. In this way, a console 2 controls directly the input/output control device 4 by an SVP interface for connecting a central processor 1, a main memory device 3 and the input/output control device 4, and can display the contents of the input/output state storage area on the display part of the console 2. Accordingly, even if the operating system cannot be operated, the maintenance work can be easily performed.

Description

[Detailed Description of the Invention] [Summary] An interface that transfers status information of input/output devices between a console and an input/output control device, and a storage area that stores status information of each input/output device in the input/output control device. By providing a command from the console, even if the operating system (O8) is inoperable, the status information of the input/output device is transferred to the console and displayed, thereby facilitating maintenance work.

[Industrial application field]

The present invention relates to a maintenance information collection method for an 81 computer system,
In particular, the present invention relates to a method for collecting status information of input/output devices that makes it possible to display status information of the input/output devices on a console based on instructions from the console without depending on the control of a central processing unit.

In a computer system that has a central processing unit, main memory, console, input/output control unit, and input/output device,
When an input/output device is activated from the central processing unit, if there is a failure in the input/output control unit or input/output device, the input/output control unit will report to the central processing unit that there has been a failure. Ru.

Therefore, in order to collect status information of the input/output control device or the input/output device, it depends on the control of the central processing unit. However, from the viewpoint of maintenance of the input/output control device or the input/output device, it is desirable to be able to easily display this status information on the console without depending on the control of the central processing unit.

[Conventional technology]

As mentioned above, in a computer system, when an input/output device is activated from the central processing unit, if there is a failure in the input/output control device or input/output device, the input/output control device reports to the central processing unit, Based on this report, the operating system (O3) issues a sense command to obtain detailed information about the failure.

By executing this sense command, detailed information about the failure is transferred to the main storage device.

The operating system stores this information in special files, for example on a magnetic disk. Here, under the control of the operating system, the maintenance person outputs the information stored in the file to a printer to understand the details of the failure and perform maintenance.

[Problem that the invention seeks to solve]

As mentioned above, in the past, it was necessary for the central processing unit, main memory, etc. to be operating, the operating system to be operable, and the file that records failure information on the magnetic disk to be accessible. be.

However, if a failure occurs during initial program loading, the operating system is not fully operational and no failure information is output to a file, so it takes a long time to understand the nature of the failure.

Also, from the console, you can stop the clock of the input/output control device and view the register status and control memory contents in the input/output control device, but you cannot see the operating status of the input/output control device or the input/output control device. There is a problem in that it is difficult to grasp the state of the output device itself.

In view of these problems, the present invention provides a storage section in the input/output control device that stores the status of the input/output device for each human output device, and stores the latest status of each input/output device at the time of system reset or startup. is stored in the storage unit, and information indicating the latest status of the input/output device is displayed on the console based on a command from the console rather than a command from the central processing unit.

[Means for solving problems]

FIG. 1 is a block diagram of a circuit showing one embodiment of the present invention.

1 is a central processing unit that controls the entire computer system; 2 is a console that is operated by maintenance personnel and communicates with the computer system;
3 is a main storage device that stores data, commands, etc. processed by the central processing unit 1;

4 has an input/output status storage area for storing the status of all connected input/output devices, and controls the input/output device 5 or 6.
An input/output control device that sends and receives data and records the status of the input/output devices 5 and 6 in an input/output status storage area; It is an input/output device that performs printing, etc.

The console 2 directly controls the input/output control device 4 through the svp interface that connects the central processing unit 1, main storage device 3, and input/output control device 4, and displays the contents of the input/output status storage area on the display section of the console 2. Configure it to display.

[Effect]

With the above configuration, maintenance personnel can issue commands from the console 2 without relying on commands from the central processing unit 1.
Since the status of the input/output device 5 or 6 stored in the direct input/output control device 4 can be displayed on the display section of the console 2, maintenance work can be easily performed even if the operating system is inoperable. I can do it.

[Embodiment] FIG. 2 is a detailed block diagram of the input/output control device 4 of FIG. 1, and FIG. 3 is a flowchart explaining the operation of FIG. 2.

In FIG. 1, a central processing unit 1 operates by reading commands from a main storage device 3, controls an input/output control device 4, selects an input/output device 5 or 6, and sends out data in the main storage device 3. to memorize or print. Conversely, data sent from the input/output device 5 or 6 is stored in the main storage device 3.

The console 2 is operated by a maintenance person and the central processing unit 1
, sv that connects the main storage device 3 and the input/output control device 4
The maintenance personnel's instructions are transferred through the P interface and the required data is displayed.

Here, the operation of the input/output control device 4 will be explained using FIGS. 2 and 3.

The processor 7 reads the program stored in the control memory ↑Ito and operates, starting with a system reset. At the time of system reset, after setting the inside of the input/output control device to an initial state, all connected input/output devices are sequentially selected via the input/output interface control circuit 13, and a reset command is issued. At this time, the status of each input/output device is read and stored in the input/output status storage area 12.

The contents to be stored as the status of the input/output device include, for example, the device number of the input/output device in 1 byte, the status code of the input/output device in 2 bytes, the detailed status code of the input/output device in N bytes, and the input/output device The device status code indicates whether the device is powered on and ready for operation, whether manual intervention is required for operation, whether the input/output device selection was successful, and whether the input/output device reset was successful. This includes the status of the error, whether the error occurred, and if an error occurred, the details of the error.

When the system reset is completed, a maintenance person operates the console and issues an input/output device status read command to the processor 7 via the SVP interface control circuit 8.
Processor 7 determines whether the request is from the console or not,
If YES, it is determined whether or not it is a status report request; if NO, the process moves to other processing; if YES, the status information of the input/output device stored in the input/output status storage area 12 via the SVP interface control circuit 8 is sent. Transfer to the console and return to determining the next process.

Since the console displays this status on the display, the maintenance person can know the initial status of the input/output device by looking at this display.

After the system reset is completed, if the next process is not a request from the console but a command from the central processing unit via the CPU interface control circuit 9, the processor 7
An input/output device is selected via the input/output interface control circuit 13, and at the selected timing, the state of the input/output device is stored in the input/output state storage area 12, and the state information is updated.

After executing the command, the status of the input/output device is stored in the input/output status storage area 12 at the timing of the end, and the status information is updated. If there is a command chain, that is, if the answer is yes, move to command execution,
At the timing when this command execution ends, the status of the input/output device is stored in the input/output status storage area 2, and the status information is updated.

If an error occurs during the execution of this command, the processor 7 prepares the sense byte for the next sense command expected to be issued via the CPU interface III wholesale circuit 9, and at the same time The contents of the input/output status storage area 12 such as 1 byte for the device number of the input/output device, 2 bytes for the status code of the input/output device, and N bytes for the detailed status code of the input/output device are set in the control register 11. .

Usually, by starting from the central processing unit 1 shown in Fig. 1,
The information set in the control register 11 is transferred to the main storage device 3 and recorded in a file on the magnetic disk. The contents of this file are then printed on the printer,
Used for maintenance.

If the system stops before being recorded in this file,
Previously, error information from input/output devices was lost, but
In the case of this embodiment, if the console 2 and the input/output control device 4 are operable, the central processing unit 1 and the main controller 4. a-mount M3
Even if the device is inoperable, the error state can be displayed on the display section of the console 2 by issuing an input/output device status read command from the console 2.

At this point, the command chain ends, or if there is no command chain, the processor 7 returns to determining the next process.

〔Effect of the invention〕

As explained above, in the present invention, as long as the console and the input/output control device are operable, the status of the input/output H can be displayed on the console even if the operating system is inoperable, so maintenance is unnecessary. It can be done easily.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a circuit showing an embodiment of the present invention, FIG. 2 is a detailed block diagram of the input/output control device of FIG. 1, and FIG. 3 is a flowchart explaining the operation of FIG. 2. In the figure, 1 is the central processing unit, 2 is the console, 3 is the storage device, 4 is the input/output control device, 5.6 is the input/output device, 7 is the processor, 8 is the SVP interface control circuit, 9 is CP ■J interface control circuit, I
O is a control memory, 11 is a control register, 12 is an input/output state storage area, and 13 is a human output interface control circuit.

Claims (1)

[Claims] A central processing unit (1), a main storage device (3), a console (
2), input/output control device (4) and input/output device (5) (6
), the input/output control device (4) has a storage area for storing status information of each of the input/output devices (5) and (6), and the console (
2) is provided with an interface for transferring commands and state information stored in the storage area, and by issuing a command from the console (2) through the interface, the input/output control device (4) can A method for collecting status information of input/output devices, characterized in that status information for each input/output device stored in the storage area is transferred to the console (2) via an interface.