JPS61128351A - Communication system - Google Patents

Abstract

PURPOSE:To execute communication between computers through a console interface by executing an input request immediately in accordance with the input request and sending a console ready signal in accordance with an output signal. CONSTITUTION:When a request is outputted from an application program, an I/O request deciding means 1 decides whether the request is an input request or an output request. If the request is an input request, an input operation executing means 2 executes an input instruction. When an output request is decided by the means 1, an input instruction is executed by a signal generating means 3 and a console ready signal is sent to a unit to be communicated because the output operation of an output source is not still completed when the input operation is executed precedently. Then, the input instruction is forcedly ended. Subsequently, an output instruction is executed by an output operation executing means 4 on the basis of an output request. Thus, communication between the computers can be attained through the console interface.

Description

DETAILED DESCRIPTION OF THE INVENTION 1.1 The present invention relates to a communication system, and particularly to a control system that performs communication between computers using a console interface.

Conventionally, console control software receives the first character of data input by the operator as an attention character, and then executes an input command to receive the second and subsequent characters. It has become.

Therefore, if the time interval between the first character and the second character is very short, it will not be possible to receive input data accurately, making it difficult to communicate between computers using a console interface. There are drawbacks.

SUMMARY OF THE INVENTION An object of the present invention is to provide a communication system in which communication between computers can be performed using a console interface.

11.5 The communication system according to the present invention includes a determining means for determining an input/output request from an application program, and when an input request is determined by the determining means, an input operation is performed immediately in response to the input request. means for transmitting a console ready signal in response to the output request when the determination means determines the output request; and means for performing one output operation after transmitting the console ready signal. It is characterized by containing.

Example Hereinafter, the present invention will be explained in detail using the drawings.

The figure is a schematic diagram showing functional blocks and operating procedures thereof according to an embodiment of the present invention, and the communication system according to the present invention includes a determining means 1 for determining the content of a request from an application program, and an input operation in response to an input request. an input operation execution means 2 that executes an output operation; a signal generation means 3 that generates a console ready signal in response to an output request; an output operation execution means 4 that executes an output operation in response to the output request; and checking means 5 for checking the completion status of the command.

The determining means 1 has a function 11 for determining whether the content of a request from an application program is an input request or an output request. The input operation execution means 2 has a function 21 for setting an input mode when the request is an input, and a function 22 for executing an input command. The signal generating means 3 has a function 31 that executes the previous input command and generates a console ready signal, and a function 31 that forcibly terminates the input operation based on this command (
stop l10) function 32.

The output operation execution means 4 has a function 41 for setting the output mode.
and a function 42 for executing an output command, and the checking means 5 has a function 51 for waiting for an input/output command completion interrupt and 1.
It has a function 52 for reading the end state of input/output operations, a function 53 for checking the end state, and a function 54 for performing error handling in the case of abnormal end.

In such a configuration, when there is a request from an application program, the input/output request determining unit 11 determines whether it is an input request or an output request.

If it is an input request, control is passed to the input operation execution means 2, and the input setting section 21 sets the input mode, for example, each mode such as input end condition 2 communication law 2 communication data configuration. This mode setting is performed based on the communication protocol with the output light. Then, the input command execution unit 22 executes the input command that specifies the main storage device that stores the input data.

On the other hand, when an output request is determined by the input/output request determining means 1, if an input operation has been performed first, the output operation has not yet been completed from the output light, so the output light is not sent to the communication destination. In order to notify that the output operation is complete, the input command execution unit 31 executes the input command and sends a console ready signal to the communication destination. Then, the input command is forcibly terminated in the straf 110 section 32. Thereafter, based on the output request, the output mode setting section 41 sets the output mode, for example, the communication destination input end condition 2 communication mode.

Set each mode such as communication data configuration. This mode setting is performed based on the communication protocol with the communication destination.

Then, the output instruction execution unit 42 executes an output instruction that specifies the main memory location where the output data is stored and the output data length.

The interrupt occurrence waiting section 51 waits for the completion of the previously executed input/output command, and the end reading section 52 checks the termination state. If the determining section 53 determines that the termination has occurred abnormally, the error processing section 54 Abnormal processing is performed.

Effects of the Invention According to the present invention, an input request is immediately executed in response to an input request, and a controller 1.1 is executed in response to an output request. Since the control configuration is such that a sole ready signal is sent out, there is an effect that communication between combination vehicles can be performed using a console interface.

[Brief explanation of the drawing]

The figure is a diagram showing a schematic block diagram and its operation flow according to an embodiment of the present invention. Explanation of symbols of main parts

Claims (1)

[Claims] A communication system that performs computer-to-computer communication using a console interface, which includes a determination means for determining input/output requests from an application program, and a response to the input request when the determination means determines the input request. means for immediately executing an input operation when the output request is determined by the determining means; means for transmitting a console ready signal in response to the output request when the determination means determines the output request; and executing the output operation after transmitting the console ready signal. A communication system comprising means.