SU732845A1 - Computer interface - Google Patents

Description

The invention relates to computing and can be used in multi-machine computing complexes and ceTstx computers for connecting computers of the same type and different types between them, for connecting computers to non-standard external devices and physical objects. A device comprising a line control unit, data buffer registers, a fl3 computer interface control unit, as well as a device containing communication units with data lines, buffer registers, a switching unit, a data transfer control unit 2, are known. These devices provide the interface of a computer to several communication lines through a common interface. Their common drawback is the limited functionality, i.e. The subscriber connected to the line cannot initiate the exchange of information at the required time and is forced to wait for the scanning signal generated by the line control unit. The closest in technical essence and the achieved result is a device containing the first command register, the first and second data buffer registers, the communication control unit with the main machine, the communication control unit, a group of communication amplifier units with the line. - the output of the communication control unit with the main machine is the first control input-output of the device, and the second input is the output connected to the input-output of the first command register, the input of which is connected to the information input of the device The first input buffer data register is connected to the output of the link control unit with the host machine, and the second data buffer register is connected to the information output of the device, while the information inputs of the group of amplifiers of communication with the line are information input-output of the device, and This device does not ensure the equality of computers in the system, since the initiator of the exchange can only be the main machine. This is a serious disadvantage when using the device in multi-machine complexes, since it makes it impossible for an auxiliary machine to access it at those times when the auxiliary machine needs it (or any other computer connected to the auxiliary site). Secondly, the known device It has a limited number of modes of operation. It is possible to transfer information from the main machine to the auxiliary and from the auxiliary machine to the main one, but modifications of these modes are not possible. since the device only expands the command codes, but it does not provide for the transfer of these codes from one computer to another when establishing a connection between the machines. Thirdly, the device allows only three auxiliary machines to be connected to the main machine, which is clearly not enough in modern large computing complexes when using a powerful computer as the main computer. In addition, the principles of organization of communication between the main machine and the auxiliary devices implemented in the device, the presence of a separate matching unit for each auxiliary computer (although only one of the auxiliary computers can simultaneously participate in the exchange) makes the device non-universal, which in turn , leads either to a significant excess of hardware — (in the case of identical types of auxiliary machines), or to the need to develop fundamentally different matching blocks (in the case of different types of auxiliary computers); Bretenoux - expanding the functional capabilities of the device. This goal is achieved by the fact that the priority register of the second command register is entered into the device, the first input-code of the link control unit is connected, respectively, to the first inputs-outputs of the communication amplifiers with the line, the second input-output of the line control unit The communication is connected to the input-output of the second command register, the third input of the control unit of the communication line is connected to the third input-output of the communication control unit with the main machine. the fourth input / output of the link control unit is connected to the first input of the priority register, and the output of the link control unit is connected to the control input of the second buffer data register, the second inputs / outputs of the priority register are connected, respectively, to the second inputs -the outputs of the group of blocks of communication amplifiers with a line, the output of the first buffer register data, the input of the second buffer register and the input of the second command register are connected, respectively, to the information inputs-outputs of the group of blocks divisors communication with a line input of the first buffer data register coupled to the data input device and the output of the second buffer data register is a data output device. The drawing shows a structural diagram of the proposed device. The device contains the first register 1, commands, the first buffer pernviTp 2 data, the communication control unit 3 with the main machine, the communication link control unit 4, the priority register 5, the device’s internal highway 6, the group of TI -7 communication amplifiers with the line , the second register 8 of commands, the second buffer register 9 of data, information buses (information input device) 10 issuance of the main machine, control pin (the first control input device output) i; 11 issuances and 12 receptions of the main machine, information buses (information output of the device) 13 receptions of the main machine, information buses. (Information input-output device) reception and 15.-15, the issuance of communication lines, control buses (second control input-output device) 1.6 -le reception and 17 (-17 issuance of communication lines, communication lines computers (non-standard external devices, physical objects). The first command register 1 is for decrypting and storing a command received from the main machine, in accordance with the received command, it sets the device operation mode. The first command register 1 by information inputs is associated with information tires 10 issued the main machine, the control inputs and outputs f- with the second input / output of the communication control unit 3 with the main & machine. The first buffer register 2 of the data is intended for buffering (temporary storage) of command codes and data that need to be transferred from the main the machine into one of the pins, through the information inputs it is connected to the information buses 1O of the issuance of the main machine, through the information outputs to the internal highway 6 of the device, to the control input to the unit 3 controls communication 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 command register 1 and the first buffer data register 2. The communication control unit 3 with the main machine via the first inputs and outputs is connected with the output control buses 11 and the main machine reception control buses 12, with the second inputs and outputs with the command register 1, with the third output with the buffer data register 2 , on the third input and the fourth output - with the unit 4 controlling the communication lines. The link control unit 4 serves to interpret and generate control line signals. It also controls the operation of the second register 8 of commands and the second buffer register 9 of 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 entry and exit - with the register of 5 priorities, on exit - 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 the priorities accepted in the device; on the first input and output it is connected to the communication line control unit 4, on the second inputs and outputs - to the first inputs / outputs of the group of blocks ij -7ts. amplifiers of communication with the line. The internal highway 6 of the device is designed to transmit to any of the blocks of communication amplifiers with the information line from the first buffer register 2 data and control signals with the communication control blocks 4, and also to transfer from any of the blocks 7-7 (amplifiers communication with the information line to the second command register 8 or the second buffer register 9 data and control signals to the link control block 4. The device internal trunk 6 buses are connected to the first data buffer register 2, link control block 4 , b With the frames 7, -7, amplifiers of communication with the line, the second register of 8 commands, and the second buffer register 9 of data. The blocks 7-7) of amplifiers of communication with the line are designed to form (amplify) information and control signals transmitted in received from lines 18, -18 (communication; by (informational) inputs and outputs, they are connected to the internal highway b of the device, by first inputs and outputs - with a register of 5 priorities, by information inputs and outputs - with information buses ( issuance and information buses 14.-14 receive communication lines, by If control outputs to the outputs - with control buses 17, 17 and output and control buses 16.- 161 receive communication lines, along the first inputs and outputs with the block 4 of the control lines CBA311, the second register 8 commands is designed to decrypt and store commands from any line); in accordance with the received command, it sets the operation mode of the device. The second command register 8 is connected to the internal highway 6 of the device via the information input, and to the communication line control unit 4 via the control input and output. The second buffer register 9 of data is intended for buffering (temporary storage) of command codes and data that need to be transferred from any line 18 to the main machine via the information input it is connected to the internal highway 6 of the device, and through the information output to receive information buses 13 the main machine, on the control input - with the unit 4 of the control L1 buses. : The device works as follows. Information is exchanged between the mainframe and one of the communication lines (simultaneously). In the mode of transferring information from the main machine (OM) to one of the lines 18-18, when there is an array of information in the RAM memory that is prepared for transmission, the OM 73 command is written. issues a write command. The received channel and the OM via information buses 10 issue, accompanied by the corresponding control signals on the control buses 11 of the output of the main machine, write the command to the first register 1 of commands for setting the operating mode of the device and to the first buffer register 2 for transmitting the command code to the selected communication line, for example, 18. Addressing in the selected line is carried out in the usual manner using the communication control unit 3 with the host machine, the communication link control unit 4 and the priority register 5. The command code to write from the first buffer register 2 data through the internal trunk 6 of the device and the block 7 included in the priority register 5. The amplifiers of communication with the line are transmitted to the influence 18x | connection. 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 communication line 18 and the receipt of the counter command code from the communication line 18, receiving (sending the corresponding signals through the device’s internal highway 6 to the block 7 | of communication amplifiers with a line from / (to) control output buses 16 (buses 17 - communication reception line 18). After the communication establishment procedure (command exchange), the device goes directly to transfer data. Receiving information from the OM channel to the device The coupling interface is controlled by the communication control unit 3 with the main machine. The information itself from the issuing information bus 10 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 block 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 18 to the reception information lines 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 to the line transmits an end signal to the control buses 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 amplifier link with the line 7 and the internal highway 6 of the device enters the link control unit 4. The link control unit 4 stops the transmission control of information from the interface device to the communication line 18 and sends the corresponding signal to the communication 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 the end of data exchange signal to the OM via control buses 12 for receiving the main machine. In the mode of transferring information from any line 18. -18iSv to the main machine from the communication line, for example, 18, via information buses 15. issue through block 7 | the communication amplifiers with the line are given the command code to write (accompanied by the corresponding control signals on the control buses 17 of the output of the communication line 18). Obtained from. For example, command 18 to write is written into the second command register 8 for setting the operation mode of the interface device and into the second data buffer register 9 for transmitting the command code to the main machine. 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 unit, in turn, directing the reception bus 12 of the main machine informs the OM about the arrival with the arrival from the command 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, on the other - The OM channel, The read command comes from the OM on the information buses 10 of the main machine output to the first buffer register 2 data and the first register of 1 commands. In this case, the communication control unit 3 with the main machine controls the receiving command from the OM, and the communication control unit 4 controls the transmission of the code of this command to the line 18. After the procedure of establishing communication (exchange of command codes), the device proceeds directly to the transfer of 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 internal highway 6 of the device enters the second buffer register 9 of the data, and then via the information buses 13 of the main machine reception - into the OM. The transfer of information to the OM occurs under the control of the communication control unit 3 with the main machine. The transfer of information is stopped after the corresponding signal arrives on the control buses ITj of the LINKING line 18 to the link control unit 4 which stops controlling the reception of information from the line 18.) and sends the exchange end signal to the main link control unit 3. This blrk, in turn, transmits a signal for the end of the OM to the control buses 12 for receiving the main machine. The transfer of information may 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 an end signal to the communication control unit 4. The link control unit 4 stops controlling the reception of information to the interface device from line 18. Communication and through the internal line 6 of the device and the block of communication amplifiers with the line transmits the end signal to the control buses 16 of the communication line 18.

The mode of transferring information from the OM to one 43 communication lines is set not only by the write command received from the OM channel, as described above, but by the read command received FROM any line 18.) - 18 links. In this case, for the normal execution of the data transfer procedure from the OM channel, a counter command must be received. Similarly, the mode of transferring information from any line (communication is set not only by a command to write, received from a communication line, as described above, but also by a command to read, received from an OM channel. In this case, to perform the normal data transfer procedure from the corresponding The communication must be received by the counter command to write in. In cases where the exchange of information is initiated by a command (write or read) received from any line (communication, the OM has the ability to read the code of the incoming command. This is necessary In order for the OM to analyze the code of the command received from the communication line (with all modifiers) and send the necessary command to the interface device with the necessary modifiers of operation modes. This procedure is carried out when entering the command from the OM channel to specify the command byte. the command, the contents of the second buffer register 9 of the data on the receive bus information 13 of the main machine is transmitted to the OM channel (as described above, the command code from one of the links) is entered into this register. If, after analyzing the command code from the communication line, the OM tries to send an opposite command to the interface device not corresponding to the command from the line, this command is rejected and the interface device waits for the desired command from the OM channel. A control command is used to transfer control and official directives from the OM to any 18x-18z link or from any link in 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 communication line, the command control received from the OMII channel on information buses U issuing B, accompanied by the corresponding control signals on the issuing control buses 11, is entered into the first register 1 of commands and The first buffer data register 2, from where then through the device’s internal highway 6 and the block switched on by the priority register 5, for example, 7 communication amplifiers with a line are transmitted to the receive information buses 14 of the communication line 18. In this case, the communication control unit 3 with the main machine controls the receipt of a command from the OM, and the communication control unit 4 controls the transmission of the command code to the communication line 18. When transferring the control (service directive from the subscriber of any line 18 (-18j connection to the OM), the control command received from the line, for example, 18 // communication over the issuance information buses 16, accompanied by the corresponding control signals on the control buses 17 issuing the communication line 18j, through the communication amplifiers 17j with the line and the device’s internal highway b are entered into the second command register 8 and the second data buffer register 9, from which the main machine receives the information buses 13 to the OM channel. In this case, the unit 4 controls The communication lines control 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 proposed invention include the possibility of using various methods (x transmissions — information over communication lines (these methods vary in wide limits from high-speed parallel transmission over dedicated physical lines to serial transmission over telephone lines using modulating and demodulating equipment vani). Transfer of command codes together with modifiers from one computer to another (or from a device, a physical object to a computer) allows already at the installation stage & unrelated to identify processing programs or modes of operation. This makes it possible to use such communication protocols in which the time to perform auxiliary functions is minimized. This is due to the fact that these protocols do not require 5 additional overhead operations for transmitting control information, which in turn shortens the overall transmission time of each data block and increases the effective data transfer rate. The fact that the communication lines are an exchange initiator excludes delays in waiting for communication and increases the reactivity of the response system as a whole. There is no need for B to work on the main computer of a special line poll program. Due to this, an economy of the RAM and the processor time of the main computer is achieved. Forms have a l of. 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 the communication amplifier amplifiers with the line, the first input-output unit The main link with the main machine 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 second 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 block group 13 of communication amplifiers with only one are the information input / output of the device, and the control inputs the outputs are the second, control input-output of the device, which has a different topic, with the aim of increasing the number of matching machines and expanding functions. the capabilities of the device to account for the possibility of initiating the exchange by any machine connected, the priority register, the second command register, and the input-output of the control unit of the communication link control, respectively, are entered into it, to the first contact outputs of the communication amplifiers, The second input output of the control unit of the communication line is subunit to the input-output of the second register of the control, the third input-output of the control unit of the communication line is connected to the third input of E1YH.du control unit

connection with the main machine, the fourth input-output of the control unit of the communication lines is connected to the first input-output of the priority register, and the output of the control unit laziness is connected to the control input of the second buffer data register, the second output-output outputs priorities, respectively, to the second inputs / outputs of a group of blocks of communication amplifiers with a line, the output of the first buffer data register, input

the second buffer register and the input of the second command register are connected, respectively, to the information inputs / outputs of the group of blocks of communication amplifiers with

the line, the input of the first buffer data register is connected to the information EX. One of the device, and the output of the second buffer data register is the information output of the device.

Sources of information taken into account in the examination

1. US patent number 3482214, class. 34O-172.5, 1972.

2. US patent number 3514758, yl. 340-172.5, 1974.

3. USSR author's certificate number 437075, cl. G About F 9 / OO,

09.03.71 (prototype).

Claims (1)

A device for interfacing computers, comprising a first instruction register, first and second buffer data registers, a communication control unit with a main machine, a communication line control unit, a group of communication amplifier units with a line, the first input-output of a communication control unit with a main machine being the first the control input of the output 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 register x 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 6ποκοϊ3 communication amplifiers with the line are the information input-output of the device, and the control inputs and outputs are the second, control input -exit device, characterized in that, with a whole increase in the number of mating machines and expand the functionality of the device due to the possibility of initiating the exchange of any mating by the first machine, the priority register, the second command register are entered into it, the input-output of the communication pin control unit being connected to the first inputs and outputs of the communication line amplifiers, the second input to the output of the communication line control unit is connected to the input-output of the second register command, the third input-output of the communication line control unit is connected to the third input-output of the communication control unit of the main machine, the fourth input-output of the communication line control unit is connected to the first input-output of the priority register, and the output of the unit line control is connected to the control input of the second buffer data register, the second inputs and outputs of the priority register are connected, respectively, to the second inputs and outputs of the group of communication amplifier blocks, the output of the first data buffer register, the input of the second buffer register and the input of the second command register connected, respectively, to the information inputs and outputs of the group of blocks of communication amplifiers with 14 line, the input of the first buffer data register is connected to the information input of the device, and the output of the second buffer data register is the information output of the device.