JPH04120648A - Common bus connecting device - Google Patents

Abstract

PURPOSE:To easily connect systems connected by means of a common bus to a different kind of computer by connecting the common bus system to a channel standard interface through a common bus connecting device. CONSTITUTION:Control commands and data from a channel standard interface 2 are stored in a memory device 8 and an input-output device 4 performs access at the moment the device 4 is actuated from a host computer 1 through a connection controlling section 9. The data to be sent to the computer 1 are sent to the computer 1 through the interface 2 under the control of the section 9 after the data are once stored in the memory device 8. Therefore, when systems connected by means of a common bus are connected to the computer 1, the systems can be connected to the interface 2 through this common bus connecting device 7.

Description

[Detailed Description of the Invention] [Summary] This invention relates to a common bus connection device, and in particular, data exchange between a channel standard interface of a host computer and an input/output device connected to a common bus of a standard different from this channel standard interface. With regard to common bus connection devices that can perform For the purpose of enabling the above-mentioned common bus connection device, a memory device for storing control commands and data for the input/output device of the host device or data from the input/output device, and a memory device for storing control commands and data for the input/output device of the host device, and and a connection control unit that activates the input/output control device on the common bus interface according to the control command stored in the memory device and manages data input/output of the memory device.

[Industrial Application Field] The present invention relates to a common bus connection device, and in particular, to data transfer between a channel standard interface of a host computer and an input/output device connected to a common bus of a different standard from this channel standard interface. The present invention relates to a common bus connection device that allows transmission and reception.

[Conventional technology]

Generally, as shown in Figure 5, a central processing unit (CPU)
11, Main storage unit (MSU) 12, Memory control unit (MSU)
AC) 13, etc., are connected via an internal bus 14 to a large computer 15.
To connect an input/output device (Ilo) 16 such as a magnetic disk device to the input/output controller (IOC) 17,
It is assumed that there is a direct connection to the channel standard interface from the channel device 16 connected to the internal bus 14. Many such channels are installed in large-scale computers, and the channel standard interface specifications ensure compatibility of input/output devices, even if there are differences in the standards of internal buses, etc. It is kept constant throughout the series of calculators.

By the way, there are cases in which it is desired to connect the input/output device 21, etc. used in a minicomputer etc. to such a large computer and use it under the control of the large computer. Devices such as minicomputers often use an industry standard bus, such as a multipath or VME bus, as a common bus for connecting each input/output device. Since such a common bus 22 has a standard different from the channel standard interface of the large-scale computer described above, it cannot be directly connected.

Conventionally, in such cases, as shown in Figure 5,
This common bus 22 was connected to the internal bus of the computer via a common bus control device 23. In FIG. 5, reference numeral 24 indicates an input/output control device, and reference numeral 25 indicates a standard interface control circuit.

(Problem to be Solved by the Invention) By the way, according to the connection method described above, since the common bus control device 23 is directly connected to the internal bus 14 inside the computer, Therefore, it is necessary to develop and manufacture a common bus control device for each side. Furthermore, in order to operate this common bus control device 23, it is necessary to modify the central processing unit 11 of the computer main body and the service processor (not shown).

Therefore, in order to support multiple different computers and multiple generations of computers, it is necessary to develop and manufacture different common bus control devices, which requires a lot of development time and is not efficient, making it difficult to respond appropriately to market demands. The problem is that it cannot be done.

Therefore, when connecting a system that uses a common bus of another standard to a host device that uses a specific channel standard interface, the present invention provides a method for connecting the system to the channel standard interface. The purpose is to solve the point of view in Section H.

[Means to solve the problem]

In the present invention, means for solving the above problems are as follows:
As shown in FIG. 1, a first port 3 connected to a channel standard interface 2 of a host computer 1 is connected to an input/output device 4 via a common bus interface 5 having a standard different from this channel standard interface. A common bus connection device 7 having a second port 6 and transmitting and receiving data between the host computer and the input/output device connected to the common bus interface 5 under the control of the host computer, A memory device 8 having an address on the common bus interface 5 and storing control commands and data of the input/output device 4 of the host device or data from the input/output device 4, and a control command from the host computer 1. The present invention includes a connection control section 9 that activates the input/output control device on the common bus interface 5 in accordance with a control command stored in the memory device and manages data input/output of the memory device.

[Effect]

According to the present invention, control commands and data from the channel standard interface are stored in the memory device, and the input/output device is accessed when activated by the host computer via the connection control unit. Also,
Data to be sent from the input/output device to the host computer is temporarily stored in the memory device, and then sent to the host computer via the channel standard interface under the control of the connection control unit.

Therefore, when connecting a system connected by a common bus to a host computer, it can be connected to a channel standard interface via this common bus connection device. Therefore, as long as computers have the same channel standard interface, systems using a common bus can be connected by using the same common bus connection device regardless of their generation or type.

〔Example〕

Embodiments of the common bus connection device according to the present invention will be described below with reference to the drawings.

2 and 3 show a first embodiment of a common bus connection device according to the present invention. In this embodiment, the common bus connection device is a central processing unit (
A channel device 35 connected to an internal bus 34 of a large computer 30 in which a CPU) 31, a main storage unit (MSU) 32, a memory control device (MAC) 33, etc. are connected via an internal bus 34.
It shall be connected directly to the channel standard interface from. The common bus connection device 37 is connected to an input/output device 39 via an input/output control device 38 and a standard interface 41 via a standard interface control device 40 via a common bus 42. In the figure, reference numeral 43 indicates an input/output control device directly connected to the channel standard interface, and 44 indicates a human output control device.

FIG. 3 is a block diagram showing the configuration of one embodiment of this common bus control device. In the figure, 46 is a standard interface control unit that is connected to the channel standard interface 36 and controls data input/output with the channel standard interface 36, and 47 is a common bus interface 4.
A common bus interface control unit 49 is connected to the common bus interface 42 and the memory device 48 and controls input/output of data to and from the common bus interface 42 and the memory device 48;
A buffer unit for temporarily storing data; 50.51 indicates a processor serving as a control unit for controlling the standard interface control unit 46, common bus interface control unit 47, and buffer unit 49; and a control memory storing control information for the processor 50. ing.

In this embodiment, an address is provided on the common bus interface 42, and the above input/output device of the host device is signed by the input/output device. A memory section 52 serving as a memory device 48 for storing data, and a memory control section 53 for controlling storage of this memory section 52 are provided.

In this embodiment, the common bus connection device 37 performs the following operations. First, the flow of data from the host computer to the memory section will be explained with reference to FIG.

■ Control information that is stored in the main memory of the host computer and that controls the common bus connection device 37 that is input from the channel standard interface 36, as well as control commands and output data for input/output devices, is controlled by the standard interface. The signal is input to the buffer section 49 via the section 46.

■The processor 50 controls and stores the contents in the buffer section 49.
The control commands and output data of the input/output devices are analyzed based on the control program stored in the computer 1 and stored in the memory section 52 via the common bus interface 42 and the memory control section 53. Then, the processor 50 takes in information for activating the input/output control device or the standard interface control device based on the control information (FIG. 6(1)). The information transferred to the memory section 52 and the processor 50 by the processing of the processor 50 is transferred to the buffer section 4.
It is deleted from 9.

■The common bus interface control unit 47 receives instructions from the processor 50, accesses the common bus interface 42, and starts the specified input/output device, and the activated input/output device connects to the common bus interface 42 according to the instructions from the processor 50. (Figure 6 (2) ■).

When the input/output device is specified to access the memory section 52, the memory section 52 is accessed via the common bus interface control section 47, and control commands and output data are received and processed for information processing such as writing. (Figure 6■.

■). Then, the input/output completion status from the input/output device is temporarily stored in the storage unit and then notified to the host device (see (3) and (1) in Figure 6).

Next, the case of reading and outputting input data from the input/output device will be explained. FIG. 7 shows the flow of data, etc. in this case.

(2) Control commands and control information are output from the host device, and the control commands are input to the memory section 52, and the control information is input to the processor (FIG. 7(1)). Then, the processor starts up the input/output device based on the control information, as shown in Figure 7 (2).
)■), the input/output device is controlled by the control command of the memory unit, and the data (input data) to be sent to the host computer and the input/output completion status are temporarily sent to the memory unit 52 via the common bus interface control unit 47. input (7th
Figure (2) ■, ■)■ Then, after comparing the input/output completion status indicating that the input data has been read to the host device shipping ratio based on the control information (Figure 7 (3)), the input data from the host device is Upon receiving the control information instructing reading, the input data is sent from the memory section to the host device (Fig. 7 (4)
). With this, the input/output device, Pj-+111 zo+m bar, h bar ¥ mountain nyu will be output.

According to this embodiment, by connecting the common bus system to the channel standard interface via the common bus connection device in this way, information can be exchanged freely. Since the channel standard interface is the same regardless of the model for computers of the same series, it is possible to connect systems connected to different types of computers by a common bus using the same common bus connection device.

Furthermore, since a large number of channel standard interfaces generally exist in a computer system, many common bus systems can be easily added.

In this embodiment, the memory unit for temporarily storing control commands and data is connected to the common bus interface via the common bus interface control unit, but as shown in FIG. It may be directly connected to the bus interface 42.

〔Effect of the invention〕

As explained above, according to the present invention, data can be exchanged between a channel standard interface of a host computer, this channel standard interface control unit, and an input/output device connected to a common bus of different standards. A common bus connection device includes a memory device that stores control commands and data for the input/output device of the host device or data from the input/output device via a channel standard interface, and a memory device that stores control commands and data of the input/output device of the host device or data from the input/output device through the channel standard interface, and Since a connection control unit is provided which starts the input/output control device on the common bus interface according to the stored control commands and also manages data input/output of the memory device, the common bus system can be connected via the common bus connection device. By connecting to a channel standard interface, information can be freely exchanged. In addition, since the channel standard interface is the same regardless of the model for computers of the same series, the effect is that systems connected to different types of computers via a common bus can be easily connected using the same common bus connection device. play.

[Brief explanation of drawings]

Fig. 1 is a principle diagram of the present invention, Fig. 2 is a block diagram showing a system using an embodiment of the common bus connection device according to the present invention, and Fig. 3 is the configuration of the common bus connection device shown in Fig. 2. FIG. 4 is a block diagram showing another embodiment of the common bus connection device according to the present invention, and FIG. 5 shows a connection state between a host computer and a common bus according to the prior art. Figures 6 (1) to (3) are diagrams showing the data output operation of the common bus connection device shown in Figure 2, and Figure 7 (1).
2 to 4 are diagrams showing data input operations of the common bus connection device shown in FIG. 2. 1...Host computer 2...Channel standard interface 3...First port 4...I/O device 5...Common bus interface 6...Second port 7...Common bus connection Device 8...Memory device 9...Connection control section

Claims (1)

[Claims] 1) A first port (3) connected to a channel standard interface (2) of a host computer (1), and a common bus interface (5) of a different standard from this channel standard interface (2). A second port (6) is connected to the input/output device (4) via the host computer (1), and under the control of the host computer (1), the input/output port is connected to the host computer (1) and the common bus interface. Device(
4) A common bus connection device (7) that exchanges data with
), the memory device (8) having an address on the common bus interface and storing control commands and data of the input/output device (4) of the host device or data from the input/output device; Connection control for activating the input/output control device on the common bus interface (5) in accordance with control commands stored in the memory device (8) from the host computer (1) and managing data input/output of the memory device. A common bus control device comprising: (9). 2) The above-mentioned connection control unit includes a standard interface control unit that is connected to the channel standard interface and controls input/output of data with the channel standard interface, and a standard interface control unit that is connected to the common bus interface and the memory device and controls data input and output with the common bus interface and the memory device. a common bus interface control section that controls the input/output of the interface control section; a buffer section that is provided between the two interface control sections and temporarily stores data; and a control section that controls the standard interface control section, the common bus interface control section, and the buffer section. A common bus connection device comprising: