JPH01284951A - Input/output controller - Google Patents

Abstract

PURPOSE:To quickly carryout a process request by transmitting a logical channel number stored previously and corresponding to the number of an input/ output device when the process request is sent to a channel device from the input/output device. CONSTITUTION:When an input/output device 4-i produces a request to a channel device 2, a logical channel number received from the device 4-i and corresponding to the number of the device 4-i is read out of an associative memory 11. Then the logical channel number and a process request are sent to the device 2 so that no access is required to a main memory 3 every time the process request is received from the device 4-i.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an input/output control device, and more particularly to an input/output control device connected to a channel device via a serial interface.

Conventionally, in this type of input/output control device, when an input/output device issues a processing request to a channel device, the input/output device number and processing request received from the input/output device are sent directly to the channel device. Sending out.

The channel device accesses the main memory based on the sent input/output device number, obtains the logical channel number corresponding to the input/output device number, and executes the requested process based on the logical channel number obtained from the main memory. The operation begins.

In other words, each time an input/output device issues a processing request to a channel device, the input/output device number and processing request are sent to the channel device, so each time the channel device accesses main memory and processes the input/output device. The requested processing operation is performed by determining the logical channel number corresponding to the number.

In such conventional input/output control devices, the input/output device number and processing request received from the input/output device are sent to the channel device as they are, so when connected to the channel device via a serial interface, It takes time to convert signals from serial to parallel with the channel device, and it takes a long time to respond to the channel device due to the bait.

As a result, it takes a long time for the channel device to receive the input/output device number, and after receiving the input/output device number, the main memory must be accessed to obtain the logical channel number corresponding to the input/output device number. Because it should not be
Processing from the input/output device I! 1! There is a problem with not being able to start executing requests quickly.

To solve this problem, is it possible to quickly convert an input/output device number to its corresponding logical channel number?To do this, a conversion circuit or channel that quickly converts an input/output device number to a logical channel number is required. The disadvantage is that the channel equipment is expensive.

Another possible solution to this problem is to increase the processing speed of the interface between the channel device and the input/output control device, but this method involves increasing the distance between the channel device and the input/output device. The drawback is that you can only do so much.

The present invention has been made in order to eliminate the above-mentioned drawbacks of the conventional devices, without making the channel device expensive, and without making the channel device expensive. [i
An object of the present invention is to provide an input/output control device that can quickly start executing a processing request from an input/output device to a channel device without being subject to any restrictions.

An input/output control device according to the present invention is an input/output control device that sends a processing request from an input/output device to a channel device, and the input/output device corresponds to the input/output device number of the input/output device. storage means for storing a logical channel number stored in the storage means; and a sending means for sending the logical channel number 111f stored in the storage means 1) to the channel device in response to the processing request from the input/output device. Further, when the processing request occurs, the processing request is sent to the channel device, and the sending means sends the logical channel number iiA to the channel device.

Next, one embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention. In the figure, a human output control device 1 according to an embodiment of the present invention includes an associative memory circuit 11, a receiving port! #112, a request circuit 13, and an input/output device control circuit 14, and includes a channel device 2 connected to the main memory 3 and an input/output device 4-i (i-=1, . . .・, n) are connected.

The associative memory circuit 11 is a normal full 7゛Social Dave (fu).
This is a J6A-configured associative memory circuit, and when a processing request is made to the channel device 2 in the input/output device fi4-i, the logical channel number corresponding to the input/output device number with the processing request is output. .

The receiving circuit 12 receives the instruction command from the channel device 2, and sends the received instruction command to the input/output device number fRr14.
Notify.

The input/output device control circuit 14 controls the input/output device 4-i based on the instructions notified from the receiving circuit 12.

The request circuit 13 is connected to the input/output device control circuit 14 when the input/output device 1
The result of controlling 1-1 is stored, and the input/output device 4-i
When a processing request is made to the channel device 2 from
The processing request and the logical channel number from the content addressable memory circuit 11 corresponding to the processing request are stored and sent to the channel device 2.

When a processing request is issued to the channel device 2 from the input/output device fi4-i, the channel device 'f! 2 accesses the main memory 3 based on the input/output device number sent from the input/output device 1-1, obtains the logical channel number corresponding to the input/output device number, and connects the input/output device with the channel device 2. Device 4
-Connect with i.

At this time, the input/output device number and the logical channel number are set in the 8th position circuit 1 via the signal line 201.

The channel program 17 \31 stored in the main memory 3 is read out to the channel device 2 and edited into an instruction command for controlling the input/output device='1-i. This instruction command is signal line 2
The received signal is stored at 1/812 of the 8th reception via the signal line 12 through the signal line 121 from the receiving circuit 12 and is input to the input/output device control circuit 14 via the signal line 121.

The input/output device control circuit 1/414 controls the input/output device 4-i using the instruction command from the channel device 2 inputted from the receiving circuit 12, and stores the result in the request circuit 13 via the signal line 142. Then, it is sent from the request circuit 13 to the channel device 2 via the signal line 131.

The channel device 2 reads the next channel program 31 based on the information sent from the request circuit 13, generates an instruction command therefor, and uses the instruction command in the input/output device control circuit 14 in the same manner as described above. Input/output device 4-
1 control is performed.

When a processing request is made to the channel device 2 in the input/output device U4-i, the input/output device 4-i sends its own device's input/output device number and the processing request to the input/output device control circuit U314.

When the input/output device control circuit IIP 114 receives the input/output device number and processing request from the input/output device 4-1, it sends the input/output device number to the content addressable memory circuit 11 via the signal line 141, and sends the processing request to the signal line. 142 to the request circuit 13.

When the content addressable memory yatt receives an input/output device number from the input/output device control circuit 14, it outputs the logical channel number corresponding to the input/output device number to the request circuit 13 via line 13 111.

The request circuit 13 sends the processing request received from the input/output device control circuit 14 and the logical channel number received from the content addressable memory circuit 11 to the channel device 2 via the signal line 131. Based on the processing request and logical channel number sent, input/output device xi-i
You can start executing the requested process. That is, the channel device 2 can immediately start executing processing using the logical channel number sent from the input/output control device 1 without having to access the 1st entry and 3rd party to obtain the logical channel number.

In this way, in the input/output device 4-i, the channel device 2
When a processing request is issued to the channel device, the logical channel number corresponding to the input/output device number sent from the input/output device 4-i is read from the content addressable memory circuit 11, and the logical channel number and the processing request are sent to the channel device. 2, each time a processing request is sent from the input/output device 4-i, the logical channel number is sent to the
Since there is no need to access the main memory 3 from the channel device 2, execution of a processing request from the input/output device 4-i in the channel device 2 can be started quickly.

Furthermore, since the logical channel number is stored in the content addressable memory capacity of 1/411 of the input/output control device 1, there is no need for a conversion circuit in the channel device 2 to convert the input/output device number into a logical channel number at high speed. Processing can be started at high speed without making the channel device 2 expensive.

Furthermore, since the logical channel number is sent from the input/output control device 1 to the channel device 2, there is no need to speed up the processing operation of the interface in order to quickly convert the input/output device number to the logical channel number. Therefore, the distance between the channel device 2 and the input/output control device 1 is not restricted.

Incidentally, in one embodiment of the present invention, the first input/output device...1-i
From channel equipment! , 2, the logical channel number obtained by accessing the main memory 3 by the channel device 2 is set in the content addressable memory circuit 11, or the logical channel number is set in the content addressable memory circuit 11 in advance. It may be set in the circuit 11, but is not limited to this.

As explained above, according to the present invention, when a processing request is issued from an input/output device to a channel device, the logical channel number corresponding to the input/output device number of the input/output device is stored in advance. By sending the stored logical channel number to the channel device at the same time as sending the processing request to the channel device, the channel device does not become expensive and the connection between the channel device and the input/output device can be reduced. This has the advantage that the channel device can quickly start executing processing requests from the input/output device without being restricted by the distance between the channels.

[Brief explanation of the drawing]

FIG. 1 is a blank diagram that does not show the structure of an embodiment of the present invention. Explanation of symbols of main parts]... Human output control device 2... Channel devices 11-1 to 4-n... Input/output device 11...
・Associative memory circuit 13... Request circuit 14... Input/output device control circuit

Claims (1)

[Claims] (1) an input/output control device that sends a processing request from an input/output device to the channel device, and a storage unit that stores a logical channel number corresponding to the input/output device number of the input/output device; sending means for sending the logical channel number stored in the storage means to the channel device in response to the processing request from the input/output device, and sending the processing request when the processing request occurs; An input/output control device characterized in that the logical channel number is sent to the channel device and the logical channel number is sent to the channel device by the sending means.