JPS60116246A - Data transfer control system - Google Patents

Abstract

PURPOSE:To quicken the operation and also to prevent the traffic from being increased by transferring a transfer data via a device only having an exchange connecting function in a data processing system between a terminal device and a data processing unit. CONSTITUTION:The inside of the data transfer device is provided with a data reception control circuit DRC and a data transmission control circuit DSC at each terminal device. When data DT1-DTn to be transferred to a terminal device TM4 exist, a transfer data added with an address ADR of terminal devices TM1-TM2 to be transferred to a buffer of the terminal device TM4 is formed and stored, and it is informed to a data processing unit CPU. The CPU feeds a command to data transmission control circuits DSC1, DSC2 being data senders at a proper time to start the data transfer.

Description

DETAILED DESCRIPTION OF THE INVENTION (1) Technical Field of the Invention The present invention relates to a data transfer control system, and in particular, to a data transfer control method that enables immediate data transfer without going through a device that has issued a data transfer command, using address information added to data in advance. This invention relates to a data transfer control method.

(2) Background of the technology When a data processing device is controlling multiple terminal devices via an input/output control device, when a request to transfer data from one terminal device to another is received, or when a data processing device is controlling multiple terminal devices via an input/output control device, When a request arises to transfer data over a wire to a terminal device controlled by another data processing device, a large amount of hardware and high performance is required.

(3) Prior art and problems As a conventional data transfer control method between terminal devices, the first
As shown in the figure, this was done via the central processing unit CPU. That is, the data to be transferred is temporarily written to the main memory MM from the terminal device TM1 that has the data through the input/output control device IOC, and the address information previously stored in another location in the memory is transferred to the central processing unit. C
This is a method in which the PU reads out the data and transfers the data in the memory MM to a predetermined transfer destination, for example, the terminal device TM2. According to this method, performance is required such that the amount of memory in the main memory MM must be larger than the capacity of the buffer in any terminal device, and the processing speed of the central processing unit CPU must be fast. . In addition, when performing simultaneous data transfer (broadcast communication) to multiple terminal devices TM2 and TM3, the central processing unit CPU and input/output j
There is a drawback that the amount of 1-rahisok between lr+control device and IOC increases.

(4) Object of the Invention An object of the present invention is to improve the above-mentioned drawbacks and to provide a data transfer control system that can transfer data to a transfer destination without the intervention of a data transfer request source.

(5) Structure of the Invention The structure of the present invention to achieve the above-mentioned object is that a data processing device and a plurality of terminal devices or a plurality of data processing devices are connected to each other via a device having an exchange connection function. θ11j In a data processing system where data is transferred between end devices or data processing devices, the data transfer source creates transfer data with transfer destination address information added, and the data processing device issues a command to the prepared data transfer source. By activating data transfer, the transfer data can be transferred to the transfer data destination only via the device having the exchange connection function.

(6) Embodiment of the Invention FIG. 2 is a diagram showing the configuration of the first embodiment of the invention, and shows a case where data is transferred from one terminal device to another.

In FIG. 2, CPU is a data processing device, DTF is a data transfer device, T M 1 , T M 2 ------
indicates a terminal device. Inside the data transfer device DTP, there is a data reception control circuit DRC and a data transmission control circuit DS.
C is provided for each terminal. Data DT1. to be transferred to the terminal device TM4. Assuming that there is DT2-, it is initially stored in a buffer (not shown) in the terminal device TMJ with the address ADR of the terminal device to be transferred.

Then, the data processing device CP indicates that data storage is completed.
Notify U.

Thereafter, at an appropriate time, the data processing device CPU attaches a line number (#4 in this case) to the data transmission control circuit DSC of the terminal device TM4 having the stored data to the transfer operation command REQ, and sends the transfer operation command REQ to the data transfer device. It is sent to the DTP data reception control circuit DRCO via line #0. Details of the data reception control circuit DRC and data transmission control circuit DSC will be described later. The data reception control DRCO is a data transmission control circuit for the corresponding address number via the Hass BS.
Select SC4. Qfit terminal device T via line #4
M4 is driven, and the l1ll! of the terminal device TM4 is activated. ! The data DT1. It outputs DT2- along with address ADR to data reception control circuit DRC4 via line #3. Assume that there are two addresses ADR (Al1.#2).The reception control circuit DRC4 uses the address to control the data transmission control circuit DSCI.

Drives DSC2. Line #1. When #2 is selected, data is transmitted to both terminal devices TM1. It is sent to TM2 at the same time. Of course, when the address specifies a single terminal device, data is transferred only to that terminal device. In this transfer operation, the data processing device CPU does not intervene and merely issues the initial command.

Regarding the transfer operation command REQ from the data processing device CPU, 4! of the terminal device TM4! ! Regarding the prepared data,
It is also possible to select it and instruct to stop the operation by, for example, transferring only four from the beginning.

FIG. 3 is a diagram showing details of the data reception control circuit DRC and the data transmission control circuit DSC.
It is composed of an address buffer ABF, a reception data transfer section RDTR connected to RBF, and a reception control section RCTL connected to ABF. When data DT to which address ADR is added is input, the address and data are taken into each buffer ABF and RBF. The address of the ABF is analyzed by the RCTL, the target transfer destination is known, and the control unit CBS activates the corresponding data transmission control circuit DSC device. DSC has transmit data buffer SB
F, transmission control unit 5CTL, and transmission data transfer unit 5DT
R is connected as shown. The control path CBS activates the transmission side 1al1 unit 5CTL in the transmission control circuit DSC at the corresponding address, and controls the transmission data transfer unit 5DTR to receive data. The reception data transfer unit RDTR is controlled by the reception control unit RCT L, and when the data of the reception data 7N software RBF is taken in and sent to the data bus DBS, the reception data transfer unit 5DT is
R receives it and temporarily imports it into the transmission data bath SBF. Next, the received data is sent to the line to the terminal device.

FIG. 4 shows another embodiment of the present invention in which a switch SWS having an exchange function is provided between data processing devices. HO3T1. A data processing device and a terminal device are respectively connected to the host indicated as l-10ST2--1. For example, host H0ST2 has host HO
When there is data to be transferred to ST3, the host)
(The O5TI transmits a command to start transfer to the host HO3T2 via the switch SWS, and when received, the operation starts.

The data read from the host HOS T2 in the direction of the switch SWS has the added address decoded in the switch SWS, and is transferred to the host HO3T3.

The host I-HOS T 1 that has instructed the transfer operation does not take in or transfer data.

(7) Effects of the Invention In this way, according to the present invention, a terminal having data to be transferred starts its operation when receiving a command to start data transfer from a data processing device, and processes the data that has been commanded to be transferred. Since the data to be transferred is not stored or read in the device, the operation is quick and the amount of traffic does not increase only in a predetermined location.

[Brief explanation of drawings]

Fig. 1 is a diagram showing a data transfer control system of a conventional terminal device, Fig. 2 is a diagram showing the configuration of a first embodiment of the present invention, and Fig. 3 is a diagram showing the data reception control circuit and data transmission in Fig. 2. FIG. 4 is a diagram showing details of the control circuit. FIG. 4 is a diagram showing the configuration of a second embodiment of the present invention. CPU--Central processing unit TM1, TM2 - Terminal device MM--Memory DTF-Data transfer device D RC--Data reception control circuit DSC-Data transmission control circuit RE C1--Transfer operation command DTI, DT2-Data ADR-Address Patent Applicant Fujitsu Limited Agent Patent Attorney Eine Suzuki 1st Shij

Claims (1)

[Claims] 1 A data processing device and a plurality of terminal devices, or a plurality of data processing devices are connected to each other via a device having an exchange connection function, or between terminal devices or data processing devices,
In a data processing system where data transfer is performed, the data transfer source creates transfer data with transfer destination address information added, and the data processing device commands the prepared data transfer source to start data transfer. . A data transfer control method, characterized in that transfer data is transferred to a transfer data destination only via the device having the exchange connection function. 2. The data transfer control method according to claim 1, wherein the data transfer source adds a plurality of transfer destination addresses to the transfer data to simultaneously transfer the data to a plurality of data transfer destinations.