JPS62257565A - Control system for cpu terminal - Google Patents

Abstract

PURPOSE:To reduce the number of necessary communication controllers, circuits, and terminals, by commonly connecting a CPU and communication controllers connected with terminals with the same bus and providing a terminal controlling means in the CPU. CONSTITUTION:A terminal outputs a login request to a CPU connected with the terminal and the CPU inputs the login request by means of an inputting means 402. Then the CPU discriminates whether the inputted login request designates its own CPU or another CPU by means of a discriminating means 403. If the login request is addressed to its own CPU, the CPU carries out a login process by using a login processing means 404. If it is discriminated that the login request is address to another CPU, the CPU transfers the request to the designated CPU by means of a transferring means 405. Therefore, the numbers of necessary communication controllers, terminals, and circuits required for the terminals can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a terminal control system for a plurality of central processing units commonly connected via a bus.

[1 Already Required] The present invention provides a terminal control method for a plurality of central processing units commonly connected via a bus, in which a terminal is not fixedly connected to a specific central processing unit, but is controlled via a communication control device. Connect the terminal to the specified central processing unit in the central processing unit at startup, and based on the login request from this connected terminal to which central processing unit you want to log in, By providing a terminal control means that logs in to the device or other central processing unit, performs human output, and performs logout processing in response to a logout request after input/output is completed, the number of communication control devices and terminals required can be reduced, and system efficiency can be improved. This is an attempt to make it more economical.

[Conventional technology]

Conventionally, in this type of so-called loosely coupled terminal control system for multiple central processing units, as shown in FIG. It was necessary.

In FIG. 7, the central processing unit (0) (CPU (0)
) 1) 1 has a terminal (0) via a communication control device 21).
) 31) and terminal (1) 312 are connected, similarly, central processing unit (1) (CPU (1) ”) 1
) 2 is connected to the terminal (2) 31 via the communication control device 212.
3 and a terminal (3) 314 are connected, and the central processing unit (2) (CPU (2)) 1) 3 is connected to the communication control device 2.
13 via terminal (4) 315 and terminal (5) 31
6 are connected respectively.

Therefore, the terminal could only log into the central processing unit to which it was physically connected. for example,
Even if the login request 20 was sent from the terminal (1) 312 by specifying the central processing unit (1) 1) 2, login was not possible.

[Problem that the invention seeks to solve]

In the conventional central processing unit terminal control method described above, it is necessary to physically connect the central processing unit and the terminal via a communication control device, so the communication control device and line are adjusted according to the number of central processing units. The disadvantage is that it requires a terminal and a terminal, making it difficult to make the system economical.

SUMMARY OF THE INVENTION An object of the present invention is to provide a terminal control method for a central processing unit that eliminates the above drawbacks, reduces the number of necessary communication control devices, lines, and terminals, and makes the system more economical.

[Means for solving problems]

The present invention provides a terminal control method for a central processing unit including a plurality of central processing units and at least one communication control device to which at least one terminal is connected, wherein the central processing unit and the communication control device each have one bus. are commonly connected to the central processing unit, and the central processing unit includes an initial connection means for logically connecting the terminal to a predetermined central processing unit at the time of startup, and an initial connection means for logically connecting the terminal to a predetermined central processing unit, and one of the central processing units to which it is desired to log in from the connected terminal. an input means for inputting a specified login request or logout request or a login request transferred from another central processing unit; and a determining means for determining whether the specified login request is for the own central processing unit or another central processing unit; a login processing means for performing login processing when the own central processing unit is specified; a transfer means for transferring the login request to the other central processing unit when the other central processing unit is specified; and a transfer means for transferring the login request to the other central processing unit; a logout processing means for performing logout processing when the
The present invention is characterized by comprising a terminal control means including a notification means for notifying the terminal when the login processing or the logout processing is completed.

[Effect]

In the present invention, a communication control device to which a terminal is connected and a central processing unit are commonly connected to the same bus, and login and logout are controlled by a terminal control means provided in the central processing unit. That is, the terminal is connected to a predetermined central processing unit by the initial connection means. This central processing unit inputs a login request specifying the other central processing unit to which the user wishes to log in from a connected terminal through the input means, and determines whether the designation is the own central processing unit or another central processing unit using the determining means. When a central processing unit is specified, the login processing means performs the login process, and when another central processing unit is specified, the transfer means transfers the login request to the other central processing unit. When the login process is completed, the notification means notifies the terminal of the ◇ze 1, and input/output is performed from the terminal. When the input/output is completed and a logout request is input from the terminal as necessary, the logout processing means performs the logout processing, and the notification means issues a notification.

Thus, according to the present invention, the necessary number of communication control devices and terminals can be arranged according to the actual throughput of the terminals, without having to be fixedly arranged for each central processing unit as in the past. It will be a good thing.

〔Example〕

Examples of the present invention will be described below.

FIG. 1 is a block diagram of a terminal control means of a central processing unit as a first embodiment of the present invention.

This terminal control means 400 includes an initial connection means 401 that logically connects the terminal to a predetermined central processing unit at the time of startup, and a log-in means 401 that logically connects the terminal to a predetermined central processing unit, and a login that specifies one of the central processing units logged in from the connected terminal. an input means 402 for inputting a request, a logout request, or a login request transferred from another central processing unit; a determining means 403 for determining whether the login request specifies the own central processing unit or another central processing unit; Login processing means 404 that performs login processing when the own central processing unit is specified; Transfer means 405 that transfers the login request to the other central processing unit when the other central processing unit is specified; and the logout request. The terminal includes a logout processing means 407 that performs a logout process when the above-mentioned login processing or the above-mentioned logout processing is completed, and a notification means 406 that notifies the terminal to that effect when the login processing or the logout processing is completed.

Next, the operation will be explained according to the flowchart shown in FIG. First, when the system startup is completed, the initial connection means 40
1, each terminal is connected to any central processing unit NR<cPU) based on a certain predetermined value (step 1). Next, the terminal outputs a login request to the connected central processing unit by specifying the central processing unit to which it wants to log in, and the central processing unit inputs the login request through the input means 402 (step 2). Next, the central processing unit uses the determining means 403 to determine whether the input login request specifies its own central processing unit or another central processing unit (step 3). If the login request specifies the own central processing unit, the own central processing unit performs login processing by the login processing means 404 (step 4). Next, the notification means 406 notifies the partner terminal that the login process has been completed (step 5). If it is determined in step 3 that the login request specifies another central processing unit, the transfer means 405 transfers it to the specified other central processing unit (step 7). This transferred login request is sent to the input means 402 of the other central processing unit.
The login process is performed by another central processing unit according to the above procedure, and the completion of the login process is notified to the other party's terminal.

Next, the terminal performs input/output with the logged-in central processing unit (step 8). Next, when the required input/output is completed, the terminal issues a logout request to the logged-in central processing unit, if necessary. The central processing unit inputs this logout request through the input means 402 (step 9). The central processing unit executes logout processing by the logout processing means 407 (step 10).

Next, the notification means 406 notifies the partner terminal that the logout process has been completed (step 1).

Next, embodiments of the present invention will be described in more detail. Third
The figure is a system configuration diagram of a second embodiment of the present invention, and is for explaining the process of step 1 in FIG. This embodiment uses three central processing units (0) 101, (1) 10
2 and (2) 103 and a communication control device 201 to which two terminals (0) 301 and (1) 302 are connected are commonly connected to the bus 500, respectively. And each central processing unit (0) 101, (1) 102 and (
2>103 is the terminal control means 40 shown in FIG.
It has 0. Then, when the system startup is complete,
Based on the default value, the terminal (0) 301 is the central processing unit (0)
101 as shown by diagonal lines.

FIG. 4 is a system configuration diagram of a third embodiment of the present invention, in which the terminal (0) 301 is connected to the central processing unit (
2) The flow of processing when a login request is made to 102 is shown. Terminal (0) 301 is central processing unit (1) 10
A login request 12 specifying 2 is input to the connected central processing unit (0) 101 (the diagonal lines indicating the connection in FIG. 3 are omitted here) via the communication control device 201. Since this manually generated login request 12 specifies the central processing unit (1) 102, the central processing unit (0) 101 sends the login request 12 to the central processing unit 1! (
1) Transfer to 102. The central processing unit (1) 102 performs login processing and notifies the terminal (0) 301 of a login completion notification 13 via the communication control unit 201. Input and output are then performed between the two.

FIG. 5 is a system configuration diagram of a fourth embodiment of the present invention. In this embodiment, in addition to the third embodiment shown in FIG. 4, a communication control device 202 to which two terminals (1) 303 and (3) 304 are connected is commonly connected to a bus 500.

Then, both terminals (0) 301 and (1) 302 use the central processing unit 1 (
The terminal (0) 301 is connected to the central processing unit (1) 102 (the diagonal lines indicating the connection in FIG. (L) 302 shows the flow of processing when the login request 16 is sent to the central processing unit (2) 103. In this case, the login request 14 from the terminal (0) 301 is sent to the central processing unit (0) via the communication control device 201.
) 101, is transferred from the central processing unit (0) 101 to the central processing unit (1) 102, and is transferred to the central processing unit (1) 102.
) 102, login processing is performed and login completion notification 1
5 is input to the terminal (0) 301 via the communication control device 201. Similarly, the login request 16 from the terminal (1) 302 is also input to the central processing unit (0) lot,
Central processing unit (0) 101 to central processing unit (2) 10
3, and the login completion notification 17 is input from the central processing bag 'II (2) 103 to the terminal (1) 302.

That is, according to this embodiment, the present invention can be applied even when a plurality of terminals are connected to one central processing unit.

FIG. 6 is a system configuration diagram of a fifth embodiment of the present invention.

The system configuration of this embodiment is the same as that of the fourth embodiment shown in FIG. Terminal (0) 3 shows the flow of processing when sending
01 inputs the login request 18 to the central processing unit (0) 101 via the communication control device 201. Central processing unit (
At 0) 101, a predetermined login process is performed, and a login completion notification 19 is sent to the terminal (0) 3 via the communication control device 201.
01 and perform input/output.

In the above embodiment, the logout request is performed by sending a logout request from the terminal to the other party's central processing unit as necessary after the input/output operations between the terminal and the central processing unit are completed.

The feature of the present invention is that, as explained in the above embodiment, the central processing unit and the communication control unit to which the terminals are connected are commonly connected to the same bus, and the central processing unit has the terminal control means shown in FIG. It lies in having.

〔Effect of the invention〕

As explained above, in the present invention, a central processing unit and a communication control device controlling a terminal are commonly connected to the same bus,
In addition, the central processing unit has means for logically logging in or logging out a specific central processing unit and a specific terminal in accordance with a login request or a logout request from a terminal. 4B
The number of devices and terminals and the lines required for them can be reduced, and an economical data processing system can be constructed.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a terminal control means of a central processing unit as a first embodiment of the present invention. FIG. 2 is a flowchart showing the operation of the terminal control means. FIG. 3 is a system configuration diagram of a second embodiment of the present invention. FIG. 4 is a system configuration diagram of a third embodiment of the present invention. FIG. 5 is a system configuration diagram of a fourth embodiment of the present invention. FIG. 6 is a system configuration diagram of a fifth embodiment of the present invention. FIG. 7 is a system configuration diagram of a conventional example. 1-1)...Step, 12.14.16.18.2
0... Login request, 13.15.17.19...
Login completion notification, 101, Ill...Central processing unit (0) (CPU (0)), 102.1)2...Central processing unit (1) (CPU (1)'), 103.
1) 3...Central processing unit (2) (CPU (2)),
201.202.21). 212.213... Communication control device, 301.31)... Terminal (0), 302.
312...Terminal (1), 303.313...Terminal (
2), 304.314...Terminal (3), 315...
Terminal (4), 316... Terminal (5), 400... Terminal control means, 401... Initial connection means, 402...
Input means, 403... Discrimination means, 404... Login processing means, 405... Transfer means, 406... Notification means, 407... Logout processing means, 500...
path.

Claims (1)

[Claims] (1) In a terminal control method of a central processing unit including at least one communication control device (201-202) to which at least one terminal (301-304) of a plurality of central processing units (101-103) is connected, the above-mentioned The central processing unit and the communication control unit are each commonly connected to one bus (500), and the central processing unit has initial connection means (401) that logically connects the terminal to a predetermined central processing unit at the time of startup. ), input means (402) for inputting a login request or logout request specifying one of the central processing units to which one wishes to log in from the connected terminal, or a login request transferred from another central processing unit, and the login request. a determining means (403) for determining whether the specified central processing unit is the own central processing unit or another central processing unit; a login processing means (404) for performing login processing when the own central processing unit is specified; Transfer means (405) for transferring the login request to the other central processing unit when a processing unit is specified;
Terminal control including a logout processing means (407) that performs a logout process when the above logout request is input, and a notification means (406) that notifies the terminal when the above login process or the above logout process is completed. 1. A terminal control system for a central processing unit, comprising: means (400).