JPS6072451A - Block transfer system in unconfirming transfer - Google Patents

Abstract

PURPOSE:To realize the transfer of a control signal with minimum constitution by providing plural meanings to the control signal and deciding timewise agreement and sequential agreement to attain summarization and also introducing the concept as unconfirming transfer. CONSTITUTION:An input/output controller 1 transmits a transfer preparation request data 31 from a data signal output device 3 and a transfer preparation request signal 21 from a control signal output device 2. When the end of preparation is confirmed by a response data 41 and a response signal 51 from a device II, a transmission data 32 is given to a device 3 for transmission and a memory request signal 22 is outputted from the device 2. This operation is repeated by a fixed length's share at a prescribed period, the management of the number of times of reception of the confirming response signal 52 within a prescribed time from the device II is performed in parallel to confirm the normality of the number of times of transfer. Then the end signal 53 is transmitted from the device 2, and when the response signal 51 and the transfer result data 54 from the device II are received, the normality is confirmed and the transfer is completed. The data is transferred while neglecting a fault, in such a way, caused during the transfer.

Description

[Detailed description of the invention] It is related to the method.

This conventional tumor device performs confirmation operations using control signals when transmitting and receiving data. The minimum time interval required for the sequence can be shortened by following the Pft-determined procedure, but there is a disadvantage that there is no °: wealth 2 °, 7 °, *
zyt+ai74.4. . This is an attempt to realize a block transfer method using 6.1° signals. □ The present invention also includes: This is an attempt to realize a block transfer method that can increase transfer speed.

The present invention achieves the original aggregation of control signals by assigning multiple meanings to control signals and determining 8-hour commitments and sequence commitments. Furthermore, by introducing the concept of unconfirmed transfer and simplifying the confirmation of each frame transfer, a block transfer method that requires fewer control signals and can increase transfer speed has been realized.

The present invention provides an input/output control device that independently performs block transfer control under control from a central control system, which includes a control signal driver/receiver, a data bus driver/receiver, a memory, and a control unit. It is composed of many things such as 1. When performing a block transfer with the opposing input/output control device, the input/output control device sends transfer preparation request data to the opposing input/output control device on the transmission data bus, and turns on the transfer preparation request signal to prepare for transfer. After confirming that the response data and response signal on the reception data bus are turned on, ready, and completed, when transmitting from the input/output control device, the transmission data is sent on the transmission data bus. Then, the operation of turning on the memory request signal is repeated a fixed number of times at a constant cycle, and the blade facing input/output control device returns an acknowledgment signal every time data is received, which is then sent back to the input/output control device. Count and check the normality of the number of transfers, then move to the end operation,
When receiving data from the input/output control device, the other person's output control device loads data onto the reception data bus in response to a memory request signal of a fixed period from the input/output control device.

The operation of returning the acknowledgment signal is repeated, and the human output control device confirms the normality in the same manner as when transmitting, and moves to the i-end operation.

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In the fixed-length block transfer method based on the sequence described above, this is a clock control method that is driven by the input/output control device, and by making the transmission/reception trigger signal and its acknowledgment signal independent, the clock control method is driven by the input/output control device. Block transfer can be performed with a trigger cycle of In addition, it is possible to realize an unconfirmed block transfer method which is characterized in that only the normality of the number of transferred words is independently monitored based on the above-mentioned confirmation response signal, and block transfer is not interrupted even if an abnormality occurs during the process.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram for explaining the system of the present invention, and FIG. 2 is a sequence diagram thereof. Here, a case will be described in which fixed-length block transfer is performed from the input/output control device 1 to the opposing input/output control device (2).

In the human output control device 1', the transfer preparation request data 31 is sent out from the data signal output device 3 according to the instruction from the control device 6, and the transfer preparation request signal 21 is sent out from the control signal output device 2. After receiving the response data 41 and response signal 51 from the input/output control device (2) and confirming that the preparation is complete, the control device 6 receives the response data 41 and the response signal 51 from the input/output control device (2).

The transmission data of the memory 1 is sent to the data signal output device 3, which outputs a memory request signal 22. The control device iM, 6 is
This operation is repeated for a fixed length at a fixed period, and in parallel, the crowd control system (1) counts the number of times the confirmation response signal 52 is received within a certain period of time (1). Check the normality of the number of transfers. Then, the control signal output device 2 sends out a termination signal 53 and a response signal 51 from the input/output control device ■.
When the transfer data 54 is received, the normality is confirmed together with the normality of the transmission from the human output control device ■, and the power is turned on.
complete the transfer.

In this way, this transfer method is a method that ignores any abnormality that occurs during transfer and continues, and if the normality of transfer 1 and number of transfers is not confirmed, after the transfer is completed, Re-□, transfer is performed, but with good quality □-recollection, there are almost no abnormalities, so the effectiveness of this method can be demonstrated.

Gao. . There are 114 kayo. 7., In addition to the case of transferring 1 inkstone data to the input/output control device ■1. .

Input/output control device 1. In some cases, data transfer of the memory 17 of the input/output control device (2) is requested. In this case as well, the human output control device I sends out the transfer base Ir11 request data and the transfer preparation request signal, and after confirming the response data and response signal from the input/output control device ■, sends out the memory request signal at regular intervals. Repeat a fixed number of times. on the other hand.

The input/output control device 11 puts data on the data bus 2 and returns an acknowledgment signal every time it receives a memory request signal. The subsequent operations are the same as in the case of transmission described above.

As explained above, in the method of the present invention, the transfer speed can be increased by activating the transfer preparation and making the transmission period of the memory request signal of the human output control device on the /ζ side independent. Moreover, since no confirmation operation using control signals is performed during transfer, the control section can be simplified.

[Brief explanation of the drawing]

Figure 1.
Figure 2 shows a sequence diagram of this method. 1.7...Memory, 2.11...Control signal output equipment. 3.10...Data signal output device, 4,9 Data signal input device, 5,8...Control signal input device, θ112.
··Control device. Figure 1 Figure 2

Claims (1)

[Claims] 1. In an input/output control device that independently performs block transfer control under control from a central control system, when fixed-length block transfer is performed between the input/output control device and an opposing input/output control device. Then, the input/output control device sends transfer preparation request data and a transfer preparation request signal to the opposite input/output control device to start the transfer preparation, and receives response data and a response signal from the opposite input/output control device. After confirming, when transmitting data to the input/output controller, the transmission data is placed on the transmission data bus and the operation of turning on the memory request signal is repeated a fixed number of times at a constant cycle.Meanwhile, the opposing input/output controller An acknowledgment signal is sent back each time data is received, and the turnout control device counts the acknowledgment signals within a certain period of time independently of the transmission operation, confirms the normality of the number of transfers, and moves to the end operation. When receiving the input/output control device, the operation of turning on the memory request signal is repeated for a fixed number of strokes at a constant cycle. On the other hand, the opposing input/output control device performs an operation of multiplying the response data onto the response data bus and returning an acknowledgment signal every time it receives the memory request (1) above, and when the human output control device receives the response data, , counts the above acknowledgment signals within a certain period of time, confirms the normality of the number of transfers, moves to the termination operation, performs normal/abnormal processing during the termination operation, and checks the control signal during the transfer. The block “1” in unconfirmed transfer is designed to prevent interruption even if an error occurs during the transfer.
7ri transfer method.