JPS62134751A - Information processor - Google Patents

Abstract

PURPOSE:To send and receive easily and also at a low cost the up-and-down on-line information to and from a control object, by constituting the titled processor of plural computers, and an information input/output device for sending and receiving the on-line information to and from the control object, and a shared memory device for sending and receiving directly the information which is held in common among the computers, to and from the information input/output device. CONSTITUTION:An information input/output device 3 writes up-on-line information from a control object, in the area concerned on a shared memory device 1 in order that information can be sent and received directly to and from a storage device. In such a case, the shared memory device 1 interlocks a fact that computers 2a-2n executes an access to the same area as the previous area, and protects the information concerned. Accordingly, when the up-on-line information is required, the computers 2a-2n can obtain easily the same up-on-line information by only reading out the area concerned on the shared memory device 1. Also, as for down-on-line information to the control object, by only writing the area concerned of the shared memory device 1 by each computer 2a-2n, the information input/output device 3 reads out the information on the shared memory device 1 and sends out the information to the control object.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an information processing device equipped with a shared memory device.

[Technical background of the invention and its problems]

When a plurality of computers exchange one- or three-line information with a controlled object, conventionally, the computer's t-storage device and an external information input/output device directly exchange information. It's also C,
In order for one computer (n is the number of computers) to exchange 1-re, tri-line l)'f+μ with the controlled object, [1
It was necessary to use an n:1 branching device between each computer and the 8v information source, or to provide n information source devices. As a result, the system configuration has become complicated and expensive. That is, the shared memory device stores information that is shared by each computer, but because it does not directly interface with the information input/output device, each computer is constantly required to load and retrieve information. Furthermore, since the shared memory device and the branching device are common parts of the system, the system configuration is complicated.

[Purpose of the invention]

The present invention is equipped with an information input/output device and a shared memory device that can directly exchange upstream and downstream online information, allowing multiple computers to easily and inexpensively exchange downstream online information with the control target. The purpose is to provide an information processing device that enables

[Summary of the invention]

The present invention connects an information input/output device directly to a shared memory device, whereby the shared memory device has a function of interfacing with a computer and the information input/output device, and the shared memory device has the ability to interface between the information input/output device and the controlled object. While the shared memory device is exchanging information with the information input/output device, in order to exchange downstream online information and to avoid conflicts with online information, the shared memory device is located at the same address as the information with the computer. This is an information processing device that locks the exchange of information between devices and protects shared memory device information.

[Embodiments of the invention]

An embodiment of the present invention is shown in FIG.

1 is a shared memory device, 3 is an information input/output device, 28-2
n indicates a computer. The shared memory device 1 is connected to each computer 28
2n to form a composite computer system, and further connected to the information input/output device 3.

First, inputting upstream online information into the computer will be explained.

The information input/output device 3 writes upstream online information from the controlled object to the corresponding area on the shared memory device 1 so that it can directly exchange information with the storage device. At this time, the shared memory device 1 interlocks the calculation fi2a to fi2n from accessing the same area as the previous area,
Protect applicable information. Therefore, the computers 28 to 2n do not know to which area the information input/output device 3 is writing or calling information, and when online information is needed, the computers 28 to 2n can access the shared memory device 1 By simply reading out the relevant area, each computer can easily obtain the same upstream online information.

Next, outputting of downlink online information to the outside will be explained. For example, each computer 2a to 2n simply writes down online information to the controlled object in the corresponding area of the shared memory device 1, and the information input/output device 3
Read the above information and send the information to the controlled object.

As explained above, according to this embodiment, each of the computers 2a to 2
When n is necessary, uplink and downlink online information can be exchanged with the shared memory device 1. Therefore, each computer's upstream 5. The base load due to the import and retrieval of downstream online information can be reduced. Other.

Each computer only needs to exchange upstream and downstream online information between the shared memory device 1 and the controlled object.

Therefore, compared to the conventional system configuration, each computer 28 to
2n needs only the shared memory device 1 to be used for sending and receiving upstream and downstream online information, so there is no need to perform complicated processing, and the system configuration can be simplified and manufactured at low cost.

Note that 5. Since the shared memory device 1 is a common part of the system,
It is also possible to improve reliability by configuring the equipment in a redundant configuration.

〔Effect of the invention〕

As described above, if the shared memory device of the present invention is adopted, each computer will need to have a branching device or a switching device and have a complicated configuration as in the past, in order to exchange upstream and downstream online information with the control target. This makes the system simpler and cheaper. Furthermore, since the uplink and downlink online information handled by each computer is centrally managed on a shared memory device, the effect is significant when the number of computers handling the information increases.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram of an information processing apparatus showing an embodiment of the present invention. 1... Shared memory device 2a, 2n... Computer 3... Information input/output device 4... Branching device 5...
・Controlled agent Patent attorney Nori Chika Yudo Hirofumi Mitsumata

Claims (1)

[Claims] Information consisting of a plurality of computers, an information input/output device that exchanges online information with a controlled object, and a shared memory device that allows information shared between the computers to be directly exchanged with the information input/output device. Processing equipment.