SU1679491A1 - I/o channels-to-subscribers interface unit - Google Patents

Abstract

The invention relates to computing and can be used to organize a common resource of subscribers in multi-machine computing systems of increased reliability with computer redundancy. The purpose of the invention is to expand the functionality by providing the issuance of information about the requests of subscribers to several computers and controlling the installation of the modes of issuing requests by computer commands. To do this in a device containing two interface units, an interface switching unit, a control unit, a communication unit with channels , a command decryption unit, a ground state byte block and a subscriber demand signal generation block, a block of request issuing modes, a request switching block and a request generation block are entered. 11 il.

Description

The invention relates to computing and can be used to organize a common resource of external devices in multi-machine reliability computing complexes with computer redundancy.

The aim of the invention is to expand the functionality of the device by ensuring the issuance of information about the requests of objects in both computers of the two-machine complex.

FIG. 1 shows a diagram of the device; in fig. 2-11 shows functional diagrams of a request mode unit, a request switching unit, a request generation unit, an interface switching unit, a communication unit with a channel, a control point unit, a command decryption unit, a state byte unit, a state byte unit and a unit forming a subscriber demand signal.

The device in this exemplary embodiment contains blocks 1 and 2 of interfaces, block 3 of switching interfaces, block 4 of the control panel, block 5 of communication with the channel, block 6 of decrypting commands, block 7 of the updated state about 8 bytes of the ground state, block 9 of generating the subscriber's request signal, the block of 10 modes of issuing requests, the block 11 of switching queries

The blocks 1, 2 of the interface are designed to match the lines 13-16 of the I / O interface of channels A and B with the equipment of the device, consisting of amplifier-receivers and amplifier-transmitters.

The interface switching unit 3 switches the subscriber interface lines 17, 18 with the lines 13. 14, and 19, 20 of the interface of channel A and the lines 15.16 and 21, 22 of the interface of channel B via the switching control signals of KAN A or KAN B.

The unit 4 of the control panel generates signals for manual control of access to subscribers DOST A, DOST B, as well as the signal OS BK, corresponding to the operation of the computation

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telny complex under control of an operating system in the mode of the increased reliability with redundancy of the computer,

The communication unit 5 with the channel generates the subscriber's control and identification signals, decrypts the subscriber's address and the logical connection of the subscriber to channel A or B, generating the subscriber's logical connection signal RAB-A and the control signals of the channel Cahn A and CAS B, as well as fixes the setting of the reservation feature after executing the RESERVATION command.

The command 6 decryption commands generates signals corresponding to the codes of channel commands: for example, the signals REZ and OSV, corresponding to the execution by the device commands RESERVATION and LIBERATION.

A block of 7 bytes of the updated state forms and records the updated information about the state of the subscriber.

A block of 8 bytes of the ground state generates and fixes the byte pointers of the main state of the subscriber, for example, ATTENTION. BUSY DISABLE.

The subscriber request signal generation unit 9 generates TRB-A signals initiating a sequence of sending subscriber state information to the channel.

The functional purpose and composition of blocks 1–9, as well as connections 13–36, are determined by the requirements of OST GO.304.000 EC computers. I / O interface. Structure and composition. Requirements for functional characteristics. These blocks provide the implementation of standard procedures for the exchange of signals between the channel and the device: sequences of signals of the initial sample, sampling of the occupied device, sampling entered by the device, and data transfer.

The block 10 modes of issuing requests is designed to install on commands of the computer channel modes of issuing information about the subscribers' requests and contains lines 37-39 output block, elements AND 40, 41, 42, elements OR 43, 44, 45, 46 and triggers 47, 48, line 49 output of the first element I.

The request switching control unit 11 is designed to control the sequence in which information about subscribers' requests is sent to both computers and contains elements AND 50-54, elements OR 55, 56, 57 and triggers 58, 59.

The query generation unit 12 generates the enable and block signals for issuing information about subscriber requests to channels A and B and contains AND 60-65 elements, OR elements 66.67 and trigger 68,

The interface switching unit 3 contains the element OR 69 and the elements AND 70-73.

0 The channel communication unit 5 contains AND 74-78 elements, comparison circuits 79, 80, address registers 81 and 82, 83 RAB-A triggers, 84 CANNES A, 85 CANNES B, RESERVES.

The control unit block 4 contains 5 blers 87,88,89.

Block b command decryption contains a decoder 90 commands and the register 91 addresses. The 7 byte state block contains the register 92 and the AND 93 group of elements.

0 The 8th byte block of the ground state contains a register 94 and an AND 95 group of elements. The subscriber's request signal conditioning block 9 contains triggers 96 TRB-AA, 97 TRB-AB and And 98, 99 elements.

5 The device works as follows.

The commands of the computer channel are used to set the modes for the device to output information about the subscribers' requests.

0 Setting the mode of issuing information about the subscribers' requests to one computer is carried out using the channel command RESERVATION. Command execution

5 begins with an exchange between a channel and a device by sequences of signals of an initial sample, during which a logical connection of a device to a channel, for example, channel A, occurs;

0 initiating this I / O operation. At the same time, unit 5 generates a signal for the CAS A, which enters via line 24 to block 3 and provides connection of lines 17, 18 to lines 12, 14 of the channel A interface.

5 The RESERVATION command code is transmitted via lines 13, 19, 25 and 26 to the command decryption unit 6, and the corresponding RES signal is output via line 27 to the unit 5, where it establishes the device backup feature that supports the output of the CANA signal after the device executes the command and logically disconnects from channel A. Lines 17, 18 remain connected to the lines

5 of the interface of channel A 13, 14 until the reset feature is cleared by the command LIBERATION. In this case, the device and subscribers are not available for channel B, and information about subscribers' requests is given only to channel A. The mode for issuing requests to one computer can also be set

using the toggle switches for manual access control, while from block 4 through line 23 to block 3 a DOST A or DOST B signal is output.

The reset of the device reservation feature and the setting of the mode of outputting information about the subscribers' requests to both computers are performed by the command LIBERATION. In this case, the OCB signal corresponding to the command code from the output of block b is transmitted via line 27 to blocks 5 and 11. In block 5, with the reset of the reservation feature, after the execution of the command, the signal KAN A is also reset (if the device was reserved by channel A) and the device goes to neutral state is available for both computers.

In block 10, the signal SMF is supplied to the element And 40; if there is an OS B K signal at the other input (corresponding to the operation of a computer complex running the operating system in the enhanced reliability mode), the signal from the output of the AND 40 element is output to the AND А1 element, to the second input of which, before the command completes, the signal CAN trigger 47 to state 1. This characteristic corresponds to the sequence of issuing requests first to channel A, then to channel B.

The transmission of information about the requests of subscribers to both computers is performed as follows. When a subscriber-initiated service request is in block 8, the subscriber’s main state byte with the ATTENTION indicator is the corresponding biofeedback signal O on line 32 to blocks 9 and 11. In block 9, the biofeedback signal O generates a demand signal signal is output via lines 31, 24, 20, and 14 into channel A. In this case, the output of a TRB-A signal to channel B is blocked by a BLKZPR B signal generated in block 12 on AND 64, OR 66 and outputted on line 33 in block 9.

Channel A, having received the TRB-A signal, responds with a VBR-K channel sampling signal, thereby beginning the exchange with the device of standard signal sequences to receive information about the subscriber's request (subscriber address and its status byte). After receiving a VBR-K signal from channel A, the device logically connects to the channel, and block 5 generates a signal KA A, which is output via line 24 to block 3, where it controls the connection of the device to channel 13 of the channel A. The interface issues channel A signal of logical connection RAB-A, as well as the address code of the subscriber with the identification signal

ADR-A. In response, the channel issues a UPR-K signal, and after that, the device responds by issuing a status byte to the channel with UPR-A identifiers.

The UPR-A signal from block 5 also enters via line 24 to block 11 at the input of element And 54, while the BFU O signals (ground state byte pointer), ATTENTION, OS are output to the other inputs of element And 54

0 VK (high reliability mode) and OCH A B (request mode in both computers). The signal formed at the output of element And 54 is fed to the input of element I 53, and from its output to the input of trigger 59, it is set to 5 in state 1.

Channel A. having received a subscriber's main state byte, sends an INF-K signal to the device, which indicates the completion of the request information transfer procedure

0 subscriber to channel A. In block 5, a signal INF-K UPR-A is generated, which is fed through line 24 to block 12 at the input of element I 60, to the second input of which the signal VN A B is received through line 35 from

5 of the block 11, and sets the trigger 68 to the state 1. The signal INF-Xsarate from the subscriber signals RAB-A and UPR-A, while resetting the ground state byte register in block 8 of the VP A signals is blocked

0 V, outputted from block 11 via line 35. The device is logically disconnected from channel A (CAN signal A is reset) and switches to the neutral state.

Signal PER HV with trigger output 68

5 is fed to the input of the element 62, to the second input of which from block 11 via line 35 a signal BH B is outputted, and at the output it generates a signal PER BH B outputted through line 33 to block 9 to generate a signal TRB-A in

0 channel B. At the same time, the signal PER HV B arrives at the element OR 67, which forms the signal of the BLK DPR A - the blocking signal for issuing a request to channel A, issued via line 33 also in block 9,

5 Channel B, in response to the TRB-A signal, outputs a VBR-K signal. The device, receiving a VBR-K signal, logically connects to channel B and outputs a RAB-A signal, while unit 5 generates a CAN signal B connected to

0 lines 15.16 of the interface of channel B, Issuance to channel B of information about the subscriber's request — the address of the subscriber and the status byte occurs in a standard manner similar to transmitting such information to channel A.

5 Upon completion of receiving information about the request, channel B sends an INF-K signal to the device. In this case, the signal INF-K UPR-A from block 5 enters via line 24 to block 11 at the input of element AND 51 (at the other inputs of element AND 51 at this time there are signals PER HV and KAN V), from which the signal through the element OR 56 is outputted to trigger input 59 and resets it, thereby forming HVA B signal on the OR 57 element, blocking the reset of the ground state byte register in block 9 by the INF-K signal. After resetting the logical connection signal RAB by the INF-K signal -A CAN signal B is also reset, and the device goes into neutral state, while formed on the element And 61 block 12, the signal resets the trigger 68.

To establish the order of issuing requests, first the channel B and then the channel A command LIBERATE issues the channel B, while in block 10 the trigger 48 is set to state 1. When the request mode is set to one computer, by RESERVING or using toggle switches manual control of access by signals REZ or DOST A B element OR 43 in block 10 generates a reset signal for triggers 47 and 48.

When executing standard sequences of signal exchange from the beginning of the I / O, the blocks operate as follows.

Run a channel command.

The channel (for example, A) outputs on line 13 the address code of the VU, the ADR-C signal, the VBR-K signal, which through block 1, lines 19, block 3 and lines 25 arrive at block 5. The address code and the ADR-K signal arrive at the circuit Comparison 79, where the code of the address of the given VU is also supplied from the register 81. If the addresses match, the signal from the comparison circuit 79 blocks on the element I 74 the propagation of the FBG-K signal to the next VU and sets the trigger 83 RAB-A. The RAB-A signal from the output of the trigger 83 is outputted on line 24 to block 3, on line 20 to block 1 and on line 14 to channel A, and also sets the trigger 84 KAN A to state D, with a signal from the output of which line 17.18 through elements 70.71 and OR 69 in block 3 are connected to lines 19,20.

The channel, in response to the RAB-A signal, resets the ADR-K identifier; in response, the device generates the ADP-A signal to the Ich76 element of block 5 and issues it with the address code of the VU from register 81 to channel B. In response, the channel issues a command code on line 13, for example RESERVATION, which enters via lines 25.26 to block 6, to register 91 and further to decoder 90. From the output of the decoder, the REZ signal corresponding to the command code enters via line 27 to block 5 and sets the trigger 86 RESERVE to state T. The signal from the trigger output 86 arrives

trigger 84 KAN A, maintaining it in state 1 after completing the execution of the command and resetting the RAB-A signal. Thereby the device remains connected

to channel A before the release command, on which the reset is triggered, the trigger 86 RESERVE.

After the command is executed, the corresponding status byte is output to the channel.

0 formed on the register 94 of block 8, and the UPR-A signal generated on the element And 77 (the ground state byte is formed taking into account the updated state issued from block 7 from register 90 to the line m28,

5 29).

Upon receipt of a status byte, the channel responds with an INF-K signal, which completes the device's signal-channel exchange sequence.

0 Issue information about the subscriber's request for service.

When the subscriber requests in the register 91 of the block 8, the corresponding byte of the BIOS condition is generated (with the ATTENTION indicator); A BFR signal O through line 32 is output to block 9, setting, for example, trigger TR-B-AA 96. if the device was reserved for channel A (trigger 84 CAS A and 86 RESERVED in state 1). TRB-AA signal

0 enters via line 31 in block 5 per item

And 74, trigger 83 and further along line 24 to block

3, on line 20 to block 1 and on line 14 to channel

iA, In response, the channel generates a signal on line 13

UBD-KA, arriving through blocks 1, 3 on

5 lines 25 to block 5 on element I 74 and trigger 83. If a TRB-AA signal is present on element 74, further propagation of the FBG-K signal is blocked and set to state 1 trigger 83 RAB-A. With

0, the presence of the RAB-A signal on the And 76 element generates an ADP-A signal and outputs the channel code to the channel. The channel in response generates a signal UPR-K, which in block 5 on the element And 77 forms the signal UPR-A.

5 A UPR-A signal with a status byte code from block 8 is output to the channel. The channel, having received a status byte, generates an INF-K signal, which completes the exchange of signals between the channel and the device.

0 When the device is controlled by the toggle switches 89, 87 of block 4, the ACCESS A or ACCESS B signal is received via line 23 to block 3, via line 25 to block 5 to install, respectively, 84 KAN A or 85 flip-flops

5 CAN. V.

Claims (1)

Claims. A device for interconnecting I / O channels with subscribers, containing the first and second blocks of interfaces, the first inputs and outputs of which are the corresponding inputs and outputs of the device for connecting to the information and control outputs and inputs of the first and second I / O channels, and the second the inputs and outputs are respectively connected to the first and second information outputs and inputs of the interface switching units, the third information input and output of which are the corresponding input and output of the device for the keys to the information and control input and output of the subscriber, the communication unit with the channel, the control unit, the basic and updated state byte blocks, the command decryption unit and the subscriber demand signal generation unit, the output and control input connected respectively to the request input and the first output of the communication unit with a channel, the command input and the first output of which are connected respectively to the output and input of the command decryption unit, and the output of the control unit is connected to the first control input of the switch unit Interfaces, the second control input and the fourth output are connected respectively to the second output and the information input of the communication unit with the channel, the first and second state inputs connected to the first output of the ground state byte and the output of the specified state byte, and the third output - with the information input of the refined state byte block and the first information input of the ground state byte block, the second output of which is connected to the input of the subscriber demand signal conditioning block, if In order to expand the functional capabilities of the device by providing information about subscriber requests, the device includes a request generation unit, a request switching unit and a request mode unit, the output of the control unit unit being connected to the inputs of the request switching unit mode and the unit requests, the information inputs of which and the first information input of the request switching unit are connected to the second output of the communication unit with the channel and the first information input of the fore block Inquiries, the mode input, the first and second outputs and the second information input are connected respectively to the output of the query output mode block, the information input of the subscriber demand signal generation block and the second information input and output of the query switching block, the control and third information inputs and output of which are connected correspondingly with the output of the request mode block, the second output and the second information input of the byte block of the ground state, the output of the command decryption block is connected to the pack equal input of the request mode block. FIG. 2 Fi & W fig a Fi & 5 28 29 23 FIG. 7 Phage. B