SU433480A1 - A DEVICE FOR PAIRING A DIGITAL ^ '"' '' '••' • COMPUTING MACHINE WITH AVONENT TELEGRAPHY COMMUNICATION LINES - Google Patents

Description

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The invention relates to digital computing.

The known devices for interfacing the telegraph lines with the digital computer ADHD in which for exchanging information between the telegraph subscriber and the digital computer contain code conversion units, transceivers, communication with the telegraph line, analysis of correction parcels, generation of correction parcels, clock generator, coordination with the digital computer and the mode register.

The known devices transform telegraph signals into machine words and machine words into telegraph signals, providing a conjugation of two different types of communication channels: telegraph and communication channel of digital computer with external devices. With this feature

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The controls defining the interaction of the digital meter with the subscriber are either fully implemented by the digital computer or partially transferred to the device.

In the known devices, telegraphic symbols are used as control signals, the use of which as information signals is prohibited, which accordingly reduces the range of information symbols. In this case, it is impossible to have a sufficiently wide set of control (service) symbols, and did not introduce the corresponding restrictions to the nomenclature of information symbols.

The lack of service symbols necessitates the control of information flows when working with telegraph subscribers on the digital computer side, which is associated with significant machine time, overloading the RAM with redundant information and complicating processing programs.

The purpose of the invention is to expand the functionality of the device and the information capabilities of the telegraph code. In connection with this, the author contains a symbol coder, a scheme for analyzing service character combinations, a circuit for returning to the main loop, an autoresponder exchange scheme, and a symbol decryption scheme. The first input of this circuit is connected to the output of the code conversion unit, the second to the output of the correction parcel analysis block, the third to the output of the utility combination analysis circuit, the first output of which is connected to the digital matching unit, the second to the encoder, the third to the return circuit the main loop, the fourth with the scheme, the decoding of characters, the fifth with the exchange of auto-replies. The first output of the latter is connected to the mode register, the second with a code conversion unit, the third - to the matching unit with a digital computer; The first input of the main loop return circuit is connected to a symbol encoder, the output of which is connected to the matching unit with a digital computer, the second output of the main loop return circuit is connected to the matching unit with a digital computer, one of the outputs of which is connected to an auto answer circuit.

This allows hardware to carry out the whole complex of operations that determine interaction with the subscriber and control information flows.

The service operations block exchanges auto-responses, protects the input of the digital computer from random information, extracts blocks of information, and other operations that facilitate the processing of information in the digital computer. At the same time, service combinations, which are two consecutive symbols in such a combination that cannot be found in a semantic telegraphic tick, are used as control signals from a subscriber, for example carriage return - carriage return, LY, etc. Naturally, the choice of such combinations as service ones does not reduce the information capability of the used telegraph & code.

The drawing shows a block diagram of the device.

It contains a block I matching with a digital computer, a mode of the H register, a symbol encoder 3, a clock generator. signals 4, code conversion buk 5, autoresponse exchange circuit 6, analysis pattern of service character combinations 7, return circuit to main cycle 8, correction package building unit 9, correction package analysis unit 10, symbol decoding scheme II, transceiver unit 12, block of a telegraph line 13, a service operation unit 14, a communication line with a Tolegraph one. subscriber 15, line 16 with a digital computer.

BLOCK I matching with the digital computer ensures the reception of commands, control signals and information binary words from the digital computer, as well as the generation and output of interrupt signals based on signals from the components of the device 2-8,

The mode register 2 produces a change in the mode of operation of the device, both on Receiving information from a telegraph line, and on Issuing it to a telegraph line on a signal from block I by the corresponding command from a digital computer, and on a signal from: schemes 6, during the exchange of auto-replies,

  The auto-reply exchange b pattern forms the subscriber’s request auto-response symbols and the self-response auto-response symbols during the auto-response exchange as a signal,

incoming from block I, when receiving from the digital computer a command to connect to a telegraph subscriber, and from a signal from block 7, when the latter determines that the subscriber is

passed a character combination meaning an auto reply request.

The clock signal generator 4 generates the control and shift. Series of pulses required

for the operation of unit 5, as well as military, variable intervals, necessary for the formation of corrective (start and stop) messages in block 9 and for the analysis of corrective messages in block 10 by the signal from block I

when receiving informational information from the digital computer and the signal coming from: block 10, when receiving from the communication line the starting message of a telegraph signal.

Code conversion block 5 converts parallel words received from block I and circuit 6 into consecutive ones for output to block 12, as well as serially converting post / / from symbol code block 12 into parallel words using control series from a clock signal generator block and a signal from the mode register 2, which changes the operation mode of the code converter.

The circuit 8 for returning to the main cycle temporarily changes the cycle of operation of the I block, which generates interrupt signals into the machine, when reading the code from the encoder symbols 3, and returns the device to the main cycle mode equal to the telegraph signal duration, according to the signal received from the analysis circuit service combinations of characters 7, analyzing their presence or absence

Scheme 7 for analyzing service character combinations memorizes the fact of reception from a subscriber included in one of the service character combinations, as well as the fact that a subscriber receives one of the service character combinations using signals from block II (character decryption scheme) analyzing everything received from the subscriber characters.

The circuit generates signals: in block jl, which generates an interrupt signal in the digital computer when receiving one of the service character combinations from the subscriber and prohibits code rewriting from block 5; in scheme 6, when receiving from the subscriber a service. combination of characters, meaning an auto-answer request; in blocks 3 and b, when a single character is received from an aoentant that is included in one of the service character combinations.

Correction parcel forming unit 9 generates signals in block 12, which correspond to start and stop parcels, to signals generated in the block.

in the mode of issuing information to the communication line (subscriber). The temporal bindings of the corrosive packages are made on a signal from block 5,

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BLOCK 12 converts sequential binary. the character code from block 5 to the telegraph signal generated by the signal from block e and outputted to block 13. This block also converts the telegraph signal received from block 13 to serial

15, the code arriving at block 5, as well as highlighting the correction parcels analyzed by block 10.

BLOCK 10 analysis of corrective 20 parcels determines the presence and duration of starting and stop parcels using time intervals generated by the clock signal generator 4 and the resolution is given to this block for generating control batches and also for circuit II at the beginning of the character code decryption .

30 The symbol decoding circuit II produces the output of signals to the circuit 7 by signals from blocks 5 and 10 after the end of the reception of the next character from the subscriber, if

35 last included in one of the service combinations of characters.

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A communication unit 13 with a telegraph line produces an electrical

40 coordination, the necessary switching and response to the electrical signals received in telegraphy, ensuring work on. two wire telegraph line how not

45 switched and serviced. telegraph station with manual or automatic dialing.

50 The character encoder 3 generates a parallel character code by signals from the circuit V and scheme 8 for issuing it to the block I, when in block 5 the code of the symbol not included in one of the service character combinations is fixed, and the previous character was included in one of the service combinations and was fixed by the scheme 7,

In the mode of receiving information from the subscriber telegraph signals

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through bpok 13 are received in block 12 of the transceiver.

During the reception of the starting telegraph signal sending unit

10 analyzes its duration and, if the efficiency of this correction parcel is more than the norm, then aanv is the clock generator of the block h, which controls the operation of block 5, receiving the serial code of the symbol from block 12.

The symbol code is considered to be received in block 5 if block 10 establishes the presence of a stop parcel in a telegraph signal.

According to the signal from this block, circuit 11 analyzes the code of the received symbol. If the received symbol is not at the beginning of any of the service character combinations, then it is copied from block of the clock signal generator to block i and output to the digital computer; if the received symbol is the beginning of one of the service character combinations, then circuit II issues a signal to the circuit that block 5 contains a certain symbol, and circuit 7 prohibits rewriting the code of this symbol into block I. circuit 7 remembers the fact of receiving this symbol from the subscriber and the symbol code in block 5 is reset by a signal from circuit II.

In this case, after receiving the next character code in block 5, the It scheme also analyzes it.

This symbol, first, can but enter into none of the service combinations, secondly, it can be the beginning of the service combination and, thirdly, Mo.ituT be the second symbol of the service combination if the first was the beginning of one of the service combinations.

lio analysis results diagram

11 shows a corresponding signal to the circuit 7, which in the first case through the circuit 8 changes the operation cycle of the block I, which, in its turn, reads the code of the symbol memorized by the circuit 7 from the encoder 3 and outputs it to the digital computer. Then block I is issued in the digital computer of the character read by U of the input of block 5. After this, the circuit B returns block I

to work pi main cycle.

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In the second case, the circuit il gives you a signal to the circuit 7 about the reception, the symbol that is the beginning of one of the service combinations. By

This signal in circuit 7 remembers the fact of reception of this symbol and through circuit-8 the operation cycle of block I changes. In this case, the symbol code received from block 5 in

The DVR is not issued, but the character code from the encoder 3, corresponding to the previously memorized circuit 7, is output. By scheme 8, block I returns to the main Loop, the state

5 blocks and circuits at the same time as previously described. After receiving the first character, which is the beginning of one of the service combinations.

In the third case, the AND circuit generates a signal in circuit 7 to receive the second character of one of the service combinations. Output signal

25 of Scheme 7 prohibits block I from outputting the second received symbol in the digital computer and generates a signal corresponding to the content of the service symbols. If service

If the combination is an auto answer request, then the output of circuit 7 sends a signal to circuit 6, which changes the device's mode of operation to Output using the mode register 2 and sequentially sends to block 5 the character codes that constitute the device's auto answer (DVR).

After the issuance of an auto answer to the subscriber, the scheme changes the operation mode with register 2 to Receive and waits for the auto answer from the subscriber.

45 The subscriber's auto answer is accepted as a usual service combination, the fact of receiving the auto answer of the subscriber is fixed by the circuit 7, which returns the scheme b to the original

 condition. This confirms the presence and quality of communication between the subscriber and the digital computer.

If the received service combination is not an auto answer request and the subscriber auto answer, then circuit 7 outputs to block I a corresponding signal, which is output in the digital computer and indicates the presence of control (service) combinations of symbols in the information received from the subscriber. If the initiator of communication with the subscriber is a digital computer, then, at the command of the machine, unit I launches auto-reply exchange 6, which, in a failure condition, sets the mode to register 2 and issues successively in block 5, the character codes of the auto answer request. Thereafter, circuit 6 changes the state of the mode register 2 and starts receiving an auto answer, which is analyzed and recorded by the service operation unit AND, as described. After receiving an auto answer, the subscriber scheme changes the device mode to the Issue and issues an auto answer character codes in block 5. Upon completion of the issuance of an auto answer to the subscriber, circuit 6 issues a signal to block I, which sends an interrupt signal to the digital computer allowing the output of information from the digital computer to the subscriber. Thus, the presence of a block of service operations allows you to automate the exchange of auto-responses between the subscriber and the digital computer, confirming the presence and quality of the communication, as well as the subscriber’s eligibility for this connection, since only subscribers with a specific code in their auto-answer can be connected to Digital computer The interface device, which has a service operation unit, on the command of the digital computer requests an auto answer of the connected subscriber and gives it a FAULT, only after that ItSM exchanges information with the subscriber. When a request for an auto answer is received from the subscriber, the device automatically gives it its auto answer and receives the auto answer of the subscriber; only after the correct exchange of auto-answers the subscriber has access to the digital computer. The presence of a block, auxiliary operations allows the use of two-digit service combinations of symbols to select certain blocks of information, to distinguish the beginning and end of the block, to indicate a particular method of processing information received from the subscriber. Since service combinations consist of two characters, this allows the use of many different combinations, and such that cannot be found in the semantic or in any other special array of information. In this case, there is no need to have characters that are prohibited for use in the information array, thereby maintaining the information capabilities of the telegraph code. The presence of a block of service operations makes it possible not to enter into the digital computer that redundant information that is made up of service combinations of characters. In the service operations block, the service combinations of symbols are decrypted and analyzed, and in the digital computer, only one signal is output via one of the interrupt inputs, indicating that the information received from the subscriber has certain characteristics assigned to individual service combinations. . The use of service character combinations allows you to protect the digital computer from random information that does not have special marks (certain service character combinations) at the beginning and end of a block or a whole array of information, thereby increasing the noise immunity of the information transmission channel. SUBJECT OF THE INVENTION A device for interfacing an IPC computer (DVM with subscriber telegraph lines), comprising a communication unit with a telegraph line, connected through a reception / transmission unit 0 by code conversion units, analyzing correction parcels and generating correction packages, alignment matching unit, corrector parcel blocks, block matching unit, generating corrective parcels and generating correction packets, alignment matching unit, matching unit, and a block matching unit 0, the corrective parcels analysis unit and generating corrective sending units, the alignment matching unit, the corrector parcel generation unit, the corrector dispatch unit, the alignment unit and the corrector unit. connected to a clock signal generator, with an output of the mode register and a code conversion unit, characterized in that, in order to expand the functionality of the device, it contains an encryption characters, an analysis pattern of service character combinations, a return circuit to the main CYCLE-U, an interchange circuit for auto-responses and a symbol decryption circuit, the first input of which is connected to the output5 of the code-conversion unit, the second to the output of the correction parse block, the third to the first output of the circuit analysis of service combinations, the second output of which is connected to the corresponding input of the matching unit, the third to the first input of the encoder, the fourth to the input of the return circuit to the main cycle, 15, to the input The second output of which is connected to the input of the mode register, the third to the code conversion unit, the first output of the return circuit to the main loop is connected to the second input of the symbol encoder, and the second output to the corresponding input of the matching unit, the input of which is connected to the outputs of the symbol encoder and the exchange circuit auto replies

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AND