SU661543A1 - Device for interfacing central computer with peripheral digital computers - Google Patents

Description

This invention relates to the field of computing; in particular, to devices for the communication of digital computers and can be used in data processing systems. A device for communicating digital computers is known, comprising an address decryption unit, a switching unit, a priority unit, trunk valves, an encoder 1. The known device has the disadvantage that when combining machines with differing standards of information packages formats, a. also with various systems for co-controlling the control information, the functions of transforming the formats of the transmitted information to the machine receiving standard and coordinating the monitoring systems are assigned to the mathematical software, which requires the introduction of appropriate conversion programs to the mathematical software of the system, the topic and the attraction of additional arrays of computer memory, as a result, memory reserves for work programs are reduced. In addition, referring to the specified conversion programs in the process of information transfer requires additional operational time, which reduces system performance. The closest to the invention in its technical essence and the achieved result is a device for communicating central and peripheral digital computers, which contains a priority block whose inputs / outputs are connected to the first inputs / outputs of the main and auxiliary interface blocks, decipher and switch 2. The drawback of the device is the necessity of spending a large amount of equipment during its implementation. The purpose of the invention is to reduce equipment. The goal is achieved by the fact that the device contains a format conversion unit, a message monitoring unit, a main and auxiliary electrical parameters matching units, the inputs-outputs, the first, second, third outputs and the descrambler input are connected respectively to the second inputs-outputs of the auxiliary interface blocks, with the first inputs of the switch, the format conversion unit and the message control block and with the output of the main electrical parameter matching unit, the first, second, third inputs-output which are connected respectively with one input-output of the device, with the first input-output of the conversion unit and the second input-output of the main interface, the third input-output, output and input-output group of which are connected respectively with the first input- the output of the message control block, with the second input of the format conversion unit and with the third inputs-outputs of the auxiliary interface blocks, the second input output, the output and inputs of the format conversion unit are connected respectively to the second input output m traffic control unit, with. the second input of the switch, with the outputs of the auxiliary electric parameters matching blocks and the auxiliary interface blocks, the switch outputs are connected to the inputs of the corresponding auxiliary electric parameters matching blocks, the first inputs / outputs of which are connected to other device inputs-outputs, the group of input-output blocks of the message monitoring unit connected to the fourth inputs-outputs of the auxiliary interface blocks, and the fifth inputs-outputs of the auxiliary interface blocks are connected to the second inputs-outputs of the same auxiliary units for matching electrical parameters. The block diagram of the device is shown in the drawing. The device for communication of the central and peripheral digital computing areas contains the main unit 1 for matching electrical parameters, the decoder 2, the switch 3, the format conversion unit 4, the control unit 5, the main interface unit 6, the auxiliary interface units 7-9, the priority unit 10 , auxiliary units 11-13 of electrical parameters matching, inputs-outputs. The device works as follows. The main unit 1 of matching electrical parameters serves to match the electrical parameters of a logical zero and a logical unit by polarity, level and duration on a device’s pitch with a central machine and therefore allows these devices to be connected for any given difference in their elemental bases and the shape of the electrical representation of logical values . The decoder 2 is used to configure the control unit 5, the format conversion unit 4 and the switch 3 for the conversion and transmission of data arrays in the direction of the selected subscriber. Switch 3 is designed to switch arrays of information from the central machine

661543 In the direction of a specific subscriber whose address is specified by descrambler 2. The function of format conversion block 4 is to hardware reduce the transmitted data arrays to the format input standard of the receiving machine, which can be played by either the central machine or any of the subscribers. The functions of blocks 9–13 are similar to those of block 1 described above. The control unit 5 controls the correctness of the transmission of messages and supplies the information parcels with control marks, such as missing control bits, which are required by the machine-receiver standard. The main unit 6 of the equipment is a logic circuit with a memory (automatic), fixing the functional states of the standard communication channel of the central machine, for example, an exchange request, readiness for exchange, an occupation. When interfacing is involved (the central link, this block monitors the channel status of the central machine and controls the process of failure; 1.a and receiving arrays of information, generating signals at the beginning and at the end of the exchange, beginning and end of the messages, as well as control signals determined by the logic of the process, the exchange. Auxiliary blocks 7–9 of the conjugation have functions similar to those discussed above, functions of block 6. Functions of block priority 10 consist in analyzing subscriber requests and allocating requests with the highest weights. among the many The transfer of information arrays in the direction from the central site to one of the subscribers, or from any subscriber to the central machine, can be initiated either by the request of the central magnet or by the subscribers. dependences or is indicated) 1x situations device blocks interact in different ways. . The exchange initiator is central. The specified way of transmitting mass-information information from the central machine to () the limit) H10.mu subscriber. With such a connection, the central machine sends to the device a request code for communication with the desired subscriber. This code goes through block 1 to the inputs of the depositor 2, from which output the request signal is fed to the input of the corresponding block 7–9 of which is contained in the request code. Simultaneously with the non-violation of the address code of the subscriber through the block I from the central matshp. Block 6 receives the transmission direction przapak, in this case, from the central angina to the subscriber. From the outputs of the block (at a certain point in time this prn (IAC enters

to the inputs of blocks 7-9, in which information about the readiness of subscribers' channels for exchange is recorded. If the requested subscriber is ready to receive, the corresponding block 7-9 sends a ready signal to block 6, and the code for the indication of the direction of exchange is sent to the format conversion block 4 and the control block 5 to set the logical circuits of the specified blocks to the desired mode. From the outputs of the decoder 2, the inputs of the conversion unit 4, control 5 and switch 3 receive information about the choice of a specific subscriber, in accordance with the standard of which the logical circuits of the conversion unit 4 and the control unit 5. tuned to a specific algorithm for converting arrays of information in accordance with the standard of the subscriber-receiver, and switch 3 opens the way for the information to the requested subscriber. After this installation of logic circuits, unit 6 sends a signal about unit readiness for exchange via unit 1 to the central machine. Upon receipt of this signal, the central machine begins to redraw arrays of information. Passing through block 1, the transmitted information is fed to the input of the format conversion unit 4, while adopting the structure required by the standard of a particular transfer destination. Simultaneously with this control unit 5, the control information accompanying the information packages is converted to the form required by the subscriber. The generated messages with the necessary check marks come from the output of the G1 conversion unit of format 4 to the input of the switch 3, which sends them to the input of that of the blocks 11-13, which corresponds to the requested receiving destination. From the output of the indicated block, information is transmitted to the input of the corresponding receiving machine. At the end of the exchange, the central machine transmits to the device a signal for the end of the transmission, which stops the exchange processes, and the subscriber stops receiving.

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2. The direction of exchange from the subscriber to the central machine. The initiator of the exchange is the central machine.

In this case, the processes of determining the subscriber's readiness for the exchange proceed as in the previous version. If the subscriber is ready to be transmitted, the logic circuits of the format conversion unit 4, the control unit 5 are set by the corresponding signals from block 6 and the corresponding block 7-9 to the transmission mode from the particular subscriber to the central machine. After tuning to a certain mode, the central machine is about | sending the exchange signal to the device, which comes from block 6 to the corresponding one from blocks 7-9 and

initiates data transfer from the subscriber. The information array from the subscriber is transmitted through one of the blocks 11-13 through the corresponding channels to the inputs of the format conversion unit 4, which, in conjunction with the control unit 5, transforms the structure of the transmitted information arrays in accordance with the format standard and the central machine's control system the formation flow is transmitted in certain portions through block 1 to the central machine. At the end of the exchange, the transmission circuit of the device is disconnected by the end-of-exchange signal from the subscriber, and the central bus stops receiving.

3. For exchange, it comes from one or several subscribers. The direction of transmission is from the central machine to one of the subscribers.

0

In this case, applications for exchange from one or several blocks 7–9 are received at the inputs of the pribritet unit 10. From the priority block 10, block 6 receives a request for the central machine to be ready for exchange. If the central machine is ready to be exchanged,

5, priority block 10 analyzes the order of subscribers and generates an exchange enable signal in one of blocks 7-9, which corresponds to the subscriber with the highest priority among those who claim to exchange at the moment. The one of the blocks that corresponds to the subscriber who received permission to. exchange, sends to the decoder 2 a signal indicating the recipient of the information transfer. According to this signal, decipheror 2 establishes the logic circuits of the conversion unit 4 formats and control unit 5 for a certain method of transforming the transmitted information arrays in accordance with the format standards and the monitoring system of the particular receiver subscriber, and the logic gates of the switch 3 are configured to send messages in the direction of the selected destination . When the channel is prepared for the exchange, the central machine and the destination subscriber receive from the corresponding blocks 7–9 signals of the beginning of the exchange, after which the central machine begins to transmit, and the subscriber receives information packages, and the process of passing and converting information is similar to the process described in the first version of the exchange.

0

4. For the call comes from one or more subscribers. The direction of transmission from one of the subscribers to the central machine.

five

In this case, the processes of analyzing the sequence of subscribers and issuing permission for the exchange are similar to the described third variant, and the installation of logical circuits on