SU723563A1 - Interface - Google Patents

Description

one

The invention relates to computing and is intended to interface computers with devices for displaying information.

A device for the exchange of information is known, comprising an adder, reversible and summing counters, state and control signal generation units, a register, address and numerical buses G. This device has a low speed.

The closest technical solution to the invention is a device for mating, containing registers whose first inputs are connected to the first input of the device, the first and second control units of which are connected to the second and third inputs of the device 2, respectively.

The aim of the invention is to improve the speed of the device.

This is achieved by the fact that the device contains an adder, ale 1t NOT, a multiplexer, a pva decoder, avv

the counter, the inputs of which are connected to the first and second outputs of the control unit, the outputs of the first counter are connected to one input of the adder, the first and second inputs of the first decoder, and one input of the multiplexer, the other inputs of which are connected to the outputs of the registers, the second inputs of which are connected to the corresponding outputs of the first decoder , the third inputs - to the corresponding outputs of the second descrambler, the first and -in-voltage inputs of which are connected to the outputs of the second counter and the inputs of the elements NOT, whose inputs are connected to others gimi adder inputs, the outputs of which are some output device, the multiplexer output is connected to another output device, the third inputs of the decoders are connected to third and fourth outputs of the control unit.

Claims (2)

The drawing is a flowchart of the device. 37 The device contains registers 1, control unit 2, multiplexer 3, adder 4, first decoder 5, second decoder 6, first counter 7, second counter 8, NOT elements 9. The device works as follows. An information word intended for transmission from a computer to an output device comes from the device input to the inputs of registers 1. The second counter 8 excites one of the outputs of the second decoder 6. The pulse from the gate output of the control unit 2 enters through the second decoder 6 to the input of register 1 corresponding to to the excited exit of the second decoder 6, and both of them. ensures the recording of the information word in it. After that, the control unit 2, receiving signals from the computer through the corresponding input, synchronized with the frequency of recording information in registers 1, generates a pulse, which is fed to the input of the second counter 8, increasing its content by one. The latter provides the connection of the next register 1 to receive the next information word from the computer. Simultaneously, the contents of the adder 4 decrease by one. This is achieved because the number from the outputs of the second counter 8 goes to the inputs of the adder 4 through the HE elements 9. Similarly, the first counter 7 is energized gives one of the outputs of the first decimator 5, which connects the corresponding register 1 for the passage of read pulses from the gate output of the control unit 2, which are synchronized with the pulse request for incoming output devices to the device interface. In this case, the output of register 1 is connected via multiplexer 3 to the output of the device for coupling. After issuing information from this register 1, the control unit 2 generates a pulse, increasing by one the contents of the first counter 7 and, accordingly, the number and output of the adder 4. As a result, the next register 1 is switched 634 to output information to the device for outputting information. The use of two counters with corresponding decoders and a multiplexer in the device allows one to work in the mode of simultaneous reception of information from the computer and output to the output device, which increases the speed of the device for pairing. Claims of the Invention An interface device comprising pe1: isters, the first inputs of which are connected to the first input of the device,. a control unit, the first and second inputs of which are connected respectively to the second and third inputs of the device, characterized in that, in order to improve the speed of the device, it contains an adder, elements NOT, a multiplexer, two decoders and two counters, the inputs of which are connected to the first and second the outputs of the control unit, the outputs of the first counter are connected to one input of the adder, the first and second inputs of the first decoder and one input of the multiplexer, the other inputs of which are connected to the outputs of the registers, the second input Odes of which are connected to the corresponding outputs of the first decoder, third inputs to the corresponding outputs of the second decoder, the first and second inputs of which are connected to the outputs of the second counter and inputs of the elements NOT whose outputs are connected to other inputs of the adder, the outputs of which are one output of the device, output the multiplexer is connected to another output of the device, the third inputs of the decoders are connected to the third and fourth outputs of the control unit. Sources of information taken into account in the examination 1. USSR author's certificate number 5O3231, cl. G On T 3 / O4, 1974. 2. USSR author's certificate N9 457083, cl. G 06 F 3/04, 1973 (prototype). 573 2 data is intended for buffering (temporary storage) of command codes and data that need to be transferred from the main machine to one of the communication lines; it is connected to the information buses 10 of the output of the main machine via information inputs, and from the information outputs to the internal highway 6 the device, on the control input - with the unit 3 controlling the connection with the main machine. The communication control unit 3 with the main machine receives, interprets and forms the control signals of the main machine, it also controls the operation of the first register 1 of the commands and the first buffer register 2 of the data. The unit 3 for controlling the connection with the main machine via the first inputs and outputs is connected with the control output buses 11 and the control buses 12 receiving the main machine, via the second inputs and outputs with the command register 1, and with the third output with the buffer data register 2 , at the third entrance and quarter of the exit - with the block 4 control lines of communication. The link control unit 4 is used to interpret and generate the link control signals. It also controls the operation of the second register 8 commands and the second buffer register 9 data. The line control unit 4 is connected to the internal highway 6 of the device through the first inputs and outputs, to the second register 8 commands via the second inputs and outputs, and to the fourth machine through the third input and output to the control unit 3 input - and output - with a register of 5 priorities, on output - with the second buffer register 9 data. Priority register 5 is designed to provide switching of the main MACHINE with one of the communication lines in accordance with priorities adopted in the device; on the first input and output it is connected to the link control unit 4, on the second inputs and outputs to the first inputs / outputs of the group of l -Vft blocks of communication amplifiers with the line. The internal highway 6 of the device is designed to transmit to any of the blocks 7-7 of communication amplifiers with the information line from the first buffer register 2 data and control signals with blocks 4 of the control lines, as well as to transfer from any of the blocks 7-7 amplifiers of communication with the information line into the second command register 8 or the second buffer register 9 of data and control signals into the link control unit 4. The buses of the internal highway 6 of the device are connected with the first buffer register 2 of data, the link control unit 4, the communication amplifier blocks 7 -1 with the line, the second command register 8, the second buffer register 9 of data. Blocks 7j -1 of the communication link amplifier are designed to form (amplify) information and control signals transmitted in LTL communication and received from the communication lines; via (informational) inputs and outputs, they are connected to the device’s internal highway 6, through the first inputs and outputs - to the priority register 5, to information inputs and outputs - to the issuing data buses 15 -15 j and information buses (communication lines reception, control inputs 17 control buses 17, I outputs with 17 and output and control buses 16.16 ti receive lines of communication, first inputs and outputs with block 4 control lines of communication. The second register 8 commands is designed to decrypt and store commands from any line 18 (- 18 in accordance with the received command, it sets the operation mode of the device. The second command register 8 is connected to the device’s internal highway 6 via information input, and to the line control unit 4 via the control input and output. Second buffer register 9, the data is intended for buffering (temporary storage) of instruction codes and data that need to be transferred from any communication link to the main machine; via the information input, it is connected to the internal highway 6 of the device, via the information output to the information buses 13 of the main machine reception, via the control input to the control unit 4 of the communication link. : The device works as follows. Information is exchanged between the host computer and one of the communication lines (at the same time). In the mode of transferring information from the main machine (OM) to one of the most recent (communication, when there is an array of information prepared for transmission, OM The command received and issues a command to write the OM channel via the information buses 10 of the output, accompanied by the corresponding control signals on the control buses 11 of the output of the main machine, the command write to the first register 1 of commands for setting the operating mode of the device and the first buffer A data register 2 for transmitting a command code to a selected communication line, for example, 18, Addressing in a selected line is carried out in the usual way using a communication control unit 3 with the main machine | link control unit 4 and a priority register 5. Command code write from the first buffer register 2 data through the internal trunk line 6 of the device and switched on by the register 5 priorities block 7 of the link amplifiers with the line is transmitted to the link 18 /). The normal execution of the data transfer procedure is possible only if the commands received from one side of the OM channel and from the other - from the corresponding communication line. The encounter read command is received from the communication line 18 through the switched-on amplifier unit 7 of the communication with the line and the internal highway 6 of the device to the second command register 8 and the second data buffer register 9. Here, the OM communication control unit 3 controls the receipt of a command from the OM and the link control unit 4 controls the transmission of the command code to the line 18, the communication and reception of the counter command code from the communication line 18, receiving (sending the corresponding signals through the device’s internal line 6 to the block 7 of the communication amplifiers with the link to / (to) the control output line 16 (bus 17i), after receiving the link (command exchange), the device goes directly to the transfer of data. Receiving information from the OM channel to the device The interface unit controls the communication unit 3 with the main machine. The information itself from the information buses 10 of the output of the main machine enters the first data buffer register 2. Information transfer from the interface device to the communication line 18 is controlled by the line control unit 4. The information from the first buffer register 2 of the data is transmitted through the internal highway 6 of the device and the block 7 of the communication amplifiers with the line 73 58 to the 18, it is fed to the reception bus 14 of the communication line 18. The transmission of information stops after the arrival of the corresponding signal on the control bus 11 issuing the main machine to the communication control unit 3 with the main machine, which stops controlling the reception of information from the OM channel and sends an exchange end signal to the communication control unit 4. The link control unit 4 stops the control of the transmission of information from the interface device to the communication line 18 and through the internal line 6 of the device and the communication amplifier section 7 of the line transmits the end signal to the control terminals 16 of the communication line 18. The transfer of information may be so. discontinued on the initiative of line 18. In this case, the signal of the end of the exchange over the control buses 17, the output of the communication line 18 through the unit 7, the communication amplifiers with the line and the internal highway 6 of the device enters the communication line control unit 4. The link control unit 4 ceases control of the transmission of information from the interface device to the communication line 18 and sends the corresponding signal to the link control unit 3 with the host machine. This unit, in turn, stops controlling the reception of information from the OM channel to the interface device and sends to the OM the signal for the end of the data exchange and to the OM. In the mode of transmitting information from line 18. -181, communication to the main PC is out of the communication line, for example, 18, the information command is sent via the information buses 15 through the amplifier 7j of the communication with the line and a command code is written (accompanied by appropriate controls signals on control buses 17 issuance of communication line 18). The command received from L-18-J is written into the second register 8 commands for setting the operating mode of the interface device and into the second data buffer register 9 for transmitting the command code to the main one. The command code is received in the second command register 8 and the second data buffer register 9 is controlled by the link control unit 4, which sends a signal to initiate the exchange procedure from the line 18 side to the main machine in the communication control unit 3. This block, in turn, on the control buses 12 of the main machine's reception 12 informs the OM about the receipt of a command from the line initiating the exchange of information. Normal execution of the data transfer procedure is possible only if the commands received from one side of the communication line correspond to the other is from the OM channel. The command to read is received from the OM on the information bus 10 of the issuance of the main machine in the first buffer register 2 data and the first register 1 commands. In this case, the communication control unit 3 with the main machine controls the reception of the command from the OM, and the communication control unit 4 controls the transmission of the command code to the line 18. After the communication establishment procedure (command code exchange), the device proceeds directly to the transmission data. The reception of information from link 18 is controlled by the link control unit 4. Information from the information buses 15 of the output of the communication line 18 through the device’s internal highway 6 enters the second buffer register 9 of the data, and then via the information buses 13 of the main machine’s reception - to the OM. Information is transferred to the OM via the control of the communication unit 3. by car. The transfer of information is stopped after the arrival of the corresponding signal on the control buses 17 of the communication line 18 to the communication control unit 4 which stops controlling the reception of information from the line 18 and sends the exchange end signal to the communication control unit 3 with the main machine. This block, in turn, transmits the end signal to the OM on the control buses 12 of the main machine reception 12. The transmission of information can also be terminated on the initiative of the OM. In this case, the signal of the end of the exchange over the control buses 11 of the output of the main machine enters the communication control unit 3 with the main machine, which stops controlling the transfer of information to the OM channel and sends the end signal of the exchange to the link control unit 4. The link control unit 4 terminates the control of receiving information into the interface device from line 18, communication and through the internal line 6 of the device and the block 7 of communication link amplifiers transmits the end signal to the control buses 16 of the receiving link 18 . The mode of transferring information from the OM to one 43 communication lines 18-18, is set not only by the command write, received from the OM channel, as described above, but also by the command read, received from any communication line 18-18, In this case For the normal execution of the data transfer procedure from the OM channel, a counter command to write is received. Similarly, the mode of transferring information from any line (the communication is set not only by the command to write, received from the communication line, as it was on above, but also by the command to read, received from the OM channel. In this case, for normal execution of the data transfer procedure from the corresponding In the case of information exchange, an instruction must be received by a command (write or read) received from any communication line, the OM may have the code of the incoming command. so that the OM can analyze the code of the incoming communication line (with all the modifiers) and send the desired device with the necessary command modifiers of the operation modes modifier B. This procedure is performed when a command from the OM channel is received to refine the command byte. the buffer register 9 of the data on the information buses 13 of the reception of the main machine is transmitted to the OM channel (as described above, the command code from any link) is entered into this register. If after analyzing the code of the command line from the communication line, the OM tries to send an opposite command not corresponding to the command from the line to the interface device, this command is rejected and the interface device waits for the appearance of the desired command from the OM channel. The control command is used to transfer control and service directives from the OM to any line 18-18 and the communication or from some communication line to the OM. The control information intended for the subscriber connected to the communication line or for the OM is encoded by various combinations of modifiers in the code of the command itself. When a control directive is transmitted from an OM to a subscriber of any line (communication, the control command received from the 1173 channel of the OM via the information output buses 10, accompanied by the corresponding control signals on the issuance control buses 11, is entered into the first register 1 commands and the first buffer register 2 of the data, from where then through the device’s internal highway 6 and the block connected by the priority register 5, for example, 7 communication amplifiers with the line are transmitted to the receive information buses 14 of the communication line 18. Therewith the main machine controls the reception of a command from the OM, and the link control unit 4 controls the transmission of the command code to the communication line 18. When transmitting the control (service directive from the subscriber of any link to the OM, the control command, received from the line, for example, communication via the information buses 16 of the issuance, accompanied by the corresponding control signals on the control buses 17 of the issuance of the communication line 18j, through the block 17 and the communication amplifiers with the line and the internal line 6 of the device, is entered into the second register 8 of commands and second buffer first data register 9, due to torogo followed by data lines 13 receiving transmitted to the parent machine OM channel. In this case, the link control unit 4 controls the reception of this command from the communication line 18, and the communication control unit 3 with the main machine controls the transmission of the code of this command to the OM. Other advantages of the present invention include the ability to use different sp x; communication information transfer routines (these methods can vary widely from high-speed parallelel transmission via dedicated physical lines and up to serial transmission over telephone lines using modulating and demodulating equipment). Transfer of command codes together with modifiers from one computer to another (or from a device, a physical object to a computer) allows, at the stage of establishing communication, to identify processing programs or modes of operation. This gives the opportunity to use such Lrotokok,. These are communications in which the time to perform auxiliary functions is minimized. This is due to the fact that these protocols do not require 5 additional office operations to transfer control information, which, in turn, reduces the total transmission time of each data block and increases the effective data transfer rate. The fact that any of the communication lines is the initiator of the exchange eliminates waiting for the communication and increases the reactivity of the computational system as a whole. There is no need to work on the main computer of a special line poll program. Due to this, it is achieved. save the main memory and processor time of the main computer, Formula from. Device for interface of computers, containing the first command register, the first and second buffer data registers, the communication control unit with the main machine, the communication line control unit, a group of communication amplifier units with the line, the first input-output The main control unit of the communication control unit is the first control input of the device, and the second input-output is connected to the input-output of the first command register, the input of which is connected to the information input of the device, the control input of the first buffer The data register is connected to the output of the communication control unit with the main machine, and the output of the second buffer data register is connected to the information output of the device, while the information inputs of the group of communication amplifier blocks with the line are the information input / output of the device, and the control inputs the outputs are the second control input-output device, characterized in that, in order to increase the number of mating machines and expand the functionality of the device due to the possibility of initiating the exchange and with any associated machine, a priority register is entered into it, a second command register, the input-output of the link control unit is connected, respectively, to the first user-outputs of the communication amplifiers with the Line, the second input ™ output of the link control unit connected to the input-output of the second register komind, the third input-output of the control unit for communication lines; to the third management unit exit