JPH02121051A - Input/output controller - Google Patents

Abstract

PURPOSE:To highly speedily raise a system when the system is to be raised by making it possible for software to recognize the resources of the title input/ output controller and an input/output device respectively connected to the system without issuing commands for all the logical numbers. CONSTITUTION:Under a state in which respective arbitrary values are set to both a controller number setting circuit 2 and a device identification code setting circuit 4 of an input/output controller (IOC) 1, when a clock for registering resource information from a system control unit (SCU) 14 is detected in a clock detecting circuit 5, the controller number and the identification code of the IOC 1 are sent to a common bus 10 at the position of the clock assigned to the IOC 1 itself. Since the SCU 14 registers the resource information in a resource table area 21 based on bus information sent synchronously with the clock, and the software refers to this area and manages the resources of the system, time necessary for confirming the resources is minimized. Thus, time for raising the system can be shortened.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an input/output control device in a common bus type computer system, and more particularly to a method for recognizing a control device number and a device identification code required for resource management.

Conventional technology Conventionally, resource management in this type of computer system involves sequentially issuing commands containing control device numbers to all logically configured control device numbers, and input/output control devices issuing commands to themselves. When the command is recognized as
It was responding to commands. The software is
By receiving this response, the presence or absence of an input/output device is recognized and resource management is performed.

Problems to be Solved by the Invention The conventional resource management method described above issues a command to all the control device numbers that can be logically configured and waits for the response to recognize the presence or absence of an input/output control device. To,
It took a lot of time to check the resources. In particular, since it is often executed when the system is started up, it has the disadvantage that it takes a long time to start up the system.

The present invention has been made in view of the above-mentioned conventional situation,
Therefore, an object of the present invention is to eliminate the above-mentioned drawbacks inherent in the conventional technology, to be able to quickly recognize the input/output control device and the resources of the input/output device connected to the system, and to make it possible to quickly recognize the resources of the input/output control device and input/output device connected to the system. The object of the present invention is to provide a new input/output control device that enables high-speed operation.

Means for Solving the Problems In order to achieve the above object, an input/output control device according to the present invention has a control device number assigned to each input/output control device in the input/output control devices connected to a common bus. A control device number setting circuit for setting, a device identification code setting circuit for setting the identification code of the input/output device connected to the internal input/output control device, and a setting information recognition that recognizes the status of these setting circuits. A registration information sending circuit that sends information recognized by the recognition circuit to the common bus in synchronization with a clock from the common bus.

Embodiment Next, a preferred embodiment of the present invention will be specifically explained with reference to the drawings.

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

Referring to FIG. 1, the human output control device 1.11.12 (
Hereinafter abbreviated as l0CI, l0C11, l0C12),
CPU 13, system control unit (SCU) 14, M
EM15 is connected to common bus 10. Each input/output control device IOC includes a control device number setting circuit 2 configured by, for example, a dip switch, which sets a control device number given to each input/output control device, as shown in IOC1;
a setting information recognition circuit 3 that recognizes the state of the setting circuit 2.4;
Input/output devices connected to the internal input/output control device (not shown)
The apparatus includes a device identification code setting circuit 4 configured of, for example, a dip switch, a clock detection circuit 5, and a registration information sending circuit 6 for setting an identification code. The system control unit 5CU14 also includes a clock generation circuit 20 for receiving resource information from each IOC, and a resource table area 2 for storing information obtained in synchronization with the clock.
I have 1.

FIG. 2 is a diagram showing an example of a clock 100 received from the common bus and a format on the bus when registration information is sent to the common bus in synchronization with the clock 100.

Now, when arbitrary values are set in the control device number setting circuit 2 and device identification code setting circuit 4 of the IOC 1, when the clock 100 for registering resource information is detected from the 5CU 14 by the clock detection circuit 5. , the control unit number and the identification code are sent to the common bus 10 at the clock position assigned to it. 5CU14
By registering resource information in the resource table area 21 based on the bus information sent out in synchronization with the clock, the software refers to this area to perform system resource management.

As described in detail, according to the present invention, the input/output control device itself includes means for recognizing the control device number assigned to itself, and means for recognizing the identification code of the connected input/output device. By receiving the information from each recognition means and receiving the clock from the common bus, the prepared control device number and identification code are transmitted over the common bus at the position of the black tsuta assigned to oneself. By sending to
Software can quickly recognize the resources of input/output control devices and input/output devices connected to the system without issuing commands to all logical numbers, enabling faster system startup. Effects can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of an input/output control device and system according to the present invention, and FIG. 2 is a diagram showing the format of clock and bus information on a common bus. 110. input/output control device, 200. Control device number setting circuit, 300. Setting information recognition circuit, 400. Device identification code setting circuit, 500. Clock detection circuit, 600. Registration information sending circuit, 10. ,,Common bus,11. ,,l0C
112,. , l0C113, , CPU, 14. ,,SCU,15
．． ,,MEM,20. ,,clock generation circuit,21. ,
, resource table area, 100°0. clock, 101
．． ,, bus information

Claims (1)

[Claims] A control device number setting circuit for setting a control device number given to each input/output control device in input/output control devices connected to a common bus, and identification of input/output devices connected to the own input/output control device. A device identification code setting circuit for setting a code, a setting information recognition circuit that recognizes the status of these setting circuits, and information recognized by this recognition circuit is sent to the common bus in synchronization with the clock from the common bus. An input/output control device comprising a registration information sending circuit.