SU980088A2 - Device for interfacing computer with main line - Google Patents

Description

(5) DEVICE FOR COMPUTATION COMPUTATIONAL. MACHINES WITH HIGHWAY

one

The invention relates to computing and can be used in the construction of multi-machine computing systems.

Claims (2)

According to the main author.  St. No. 907536 a device for coupling a computer to a backbone is known, which contains a word counter and a current address counter, a control unit and a synchronization unit whose inputs / outputs are connected to control main buses, an information register, a group of information inputs and a control input which are connected respectively with the first group of inputs and the first output of the control unit, the line state analysis unit, the input / output group of which is connected to the corresponding control bus lines, the receiving group s and a group of transmitters, the receiver inputs of the group and the transmitter outputs of the group are connected to the information buses of the trunk, the receiver outputs of the group are connected to the information register input group, the output group of which is the device information output group, the second group of inputs, the second output and the first input of the control unit are, respectively, a group of address inputs of the device, an output of control signs and a polling input of the device, and the third output is connected to the first input of the synchronization unit, ne | e The second input and output of the line state analysis block are connected to the corresponding priority bus lines, and the second input is connected to the device request input, the word count and current address counter input groups are connected to the output receivers of the group, the output groups to the information and address groups x device outputs, the first control inputs with the fourth output of the control unit, and the second control inputs with the device polling input, the output of the word counter is connected to the second input of the control unit and the third At the input of the state analysis unit, the fourth input and the second output of which are, respectively, the response input and the startup output of the device routines, the second input of the synchronization unit is the control input. sign of the device.  The device allows the exchange of information between digital computers connected to a common highway.  Before transmitting information, the settings of the DVR-sensor matching devices are made.  (DVMd) and DVR-receiver (DVMpr), where the setup program is located in DVMd. Thus, if the initiator of the exchange is a DVR or an external device (WU), then they must form and issue an external request to the DVMd, according to which the DVMD is transferred to the setup program.  Along with the transfer of information between digital computers in multi-machine systems, a necessary requirement is also to enable the transfer of control commands between digital computers.  Control commands transfer the digital computer from the execution of one program to another.  In the known device there is no possibility of transferring control commands between the digital computers, which limits. functional capabilities of the device.  The absence in the prototype of the possibility of transferring control commands between digital computers via a common inter-machine communication line leads to the need to control the home working programs of digital computers using the interrupt system of each digital computer.  To ensure the functioning of the computing system, it is necessary to create a special external control device that would be connected to external information buses of the digital computer and inputs of external requests such as interruption of all digital computers.  Between the external control device and all the digital computers, communication must be ensured by means of a cable line in front of them, which leads to a significant increase in equipment in such a system 1 {The disadvantage of the known device lies in its limited functionality.  9 4 The purpose of the invention is to expand the functionality of the device by providing the ability to exchange commands between the subscribers of the trunk.  The goal is achieved by the fact that a command issuing unit and a command register are inserted into the device, the first group of outputs of the command issuing unit is connected to the transmitter inputs of the group, and the input group is a group of information inputs of the device, the first input is connected to the synchronization input of the device. , the second input and output respectively to the third output and the fifth input of the line analysis unit, and the second group of outputs and the third input to the corresponding control bus lines, the group of inputs of the command register is connected to the outputs of the group receivers, and the group of outputs is a group of command the device outputs, the first input of the command register is connected to the fifth output of the control unit and to the device request output, and the second input is the device command polling input, and also the fact that the command issuing unit contains two registers a, five triggers, six And elements, two pulse drivers, an OR element, a group of And elements, and three transmitters, the output of the first And element connected to the first input of the second And element, the second input of which and the first inputs of registers are connected to the group of inputs of the block and the first input of the third element And, the output connected to the second input of the first register and the first input of the first trigger, the output of which is connected to the first input of the fourth element And, the output connected to the second input of the second register and the first input about the trigger, the output of which is connected to the first input of the third trigger, the output connected to the first input of the fourth trigger and the first input of the OR element, the second input of which is connected to the output of the fifth trigger, and the output to the output of the block and the input of the first transmitter, outputs of registers connected respectively with the first inputs of the fifth and sixth elements And whose outputs and the output of the second element And are connected to the first group of outputs of the block, the output of the fourth trigger is connected to the second input of the fifth element And, the first input of the el group And through and the first pulse generator with the second input of the above element And and the second input of the group of elements And, the first and second outputs of which are connected respectively to the inputs of the second and third transmitters, the third input with the second input of the third element And, the first input the fifth trigger and the first bus of the first input of the block, the third output through the second pulse shaper with the second inputs of the first, second, third, and fifth triggers, the fourth. the input is with the second input of the fourth element And the second bus of the first input of the block, and the fifth input with the first bus of the second input of the block and the first input of the first element And the second input of which is connected to the second bus of the second input of the block and the third inputs of the third element And the third trigger, the fourth input of which is the third input of the block, the third input of the fifth trigger is connected to the corresponding bus of the group of inputs of the block, the outputs of the transmitters are the second group of outputs of the block.  FIG.  1 shows a diagram of the device; in fig.  2 is a block diagram of an analysis of the state of an intermachine exchange (MMO) highway; in fig.  3 is a control block diagram; in fig.   - block diagram of the issuance of the command.  The device (FIG.  1) contains a line state analysis block 1, a control block 2, a synchronization block 3, a Current address counter k, a 5 word counter, information register 6 of GROUP 7 transmitters, group receivers 8, a command issuing block 9, a command register 10, buses 11 and 12 priority, the input bus 13 query device, the output bus 1 run subroutine MMO, input-bus 15 device response output. bus 16 and 17 control signs of the device, input bus 18 polling devices bus 19 write to counters, bus 20 write to the information register, input buses 21 numbers of digital computers, bus 22 issue from the information register, bus 23 signs of the end of the array, tires 2t and 25 synchronization of the first and second control words, the device output request bus 26 and writing to the command register, device command interrogation input bus 27 and command register readout, command command bus 28, command output unit enable bus 29 and 30, input 31 and output 32 blocks 9.  The line state analysis block 1 ensures that the request for an MMO is memorized, the state of the MMO information highway is free (busy; and if it is not available, a signal is generated to start the control program in the digital computer for preparing the MMO and the MMO line is used for this exchange.  The control unit 2 is designed to generate control signals that ensure the operation of the entire device.  The synchronization unit 3 provides synchronization of the clock grids of the digital computer, and information is transmitted between the chorometers.  The current address counter k and the 5 word counter determine the starting (current) address and the LAYER number of the transmitted array.  Register 6 of information provides intermediate storage of transmitted information.  Transmitters 7 provide connection code; numerical tires to the information buses 33 of the trunk, and receivers 8 - connection to this highway of the control unit 2, counters and 5, the information register 6 and the register of 10 commands.  The inputs-outputs of blocks 1-3 are connected to control lines 3 of the bus.  Unit 9 issuing commands provides intermediate storage of the issued command when the trunk is occupied and issuing a command to the highway upon release.  Register 10 teams provides intermediate storage of the received command.  FIG.  1 is shown by a dotted line on a digital computer that is connected to the backbone using the device in question.  Line 1 analysis of the state of the highway (Fig.  2) contains four trigger 35-38, elements And 39 and 40, the element NOT 41, the receiver k2, the transmitter 43.  Control unit 2 (FIG.  3) contains a comparison circuit 44, triggers 4549, elements AND 50-53 shaper 54 pulses. c, receivers 55-59, transmitters 60-62, switching node 63, consisting of AND 64-74 elements, shapers 75 and 76 pulses, OR element 77.  Block 9 issuing commands (FIG.  4) contains registers 78 and 79, triggers 80 84, elements AND 85-90, elements AND 91 79 of the group, element OR 95 formers of 96 and 97 pulses, transmitters 98-100.  Using the device under consideration (the MMO channel), several digital computers are connected using information 33 and control 3, common bus lines into a single multi-machine computing system.  The device operates in two modes: transferring an array of information; control command transfer.  The mode of transmission of the information array Synchronization of the digital computer of the computer system is provided by blocks 3 of synchronization, which are part of the MMO channel of all digital computers.  -Synchronization of the digital computers participating in the MHO consists in combining the clock grids of the DVMd and DVMpr.  In a digital computer, the initiator is a program, the digital computer and external devices, if necessary, generate IMO request signals.  In this case, an option is considered when the initiator of the IMO is a DVMd.  When implementing an IMO, conflicts arise that are caused by a one-time request for an IMO by two or more digital computers at the time when the IMO trunk is occupied.  Such conflicts are solved by block 1.  All blocks 1 are connected to each other by a priority bus, with bus 11 being the input of block 1 from a higher priority digital computer, and bus 12 being the output bus for a lower priority digital computer.  Thus, the extreme left digital computer has the highest priority level, the lowest digital computer right.  For syncronization requests for MMOs.  at the end of the line, a sync sync strobe is generated. which, via a transmitter, is provided to one of the buses 3 of the highway (not shown).  A request for an MMO is formed by the DVMd and is fed to the input of the trigger 35 which captures this request and the leading edge of the signal.  sync  rewritten to trigger 36.  The rising edge of the signal. P.  sync , in the absence of requests to a higher priority digital computer (on the bus 11, the resolving potential) and provided that the machine trunk is free (at the output of the receiver k2 is the resolving potential), through the AND element GE, the request pe 8 8 is written to trigger 37, and then to trigger 38 state of intermachine main.  At the output of the trigger 37, a signal is triggered for an MMO (interrupt type) arriving at the digital computer via bus 1, and the trigger 38 via transmitter 3 installs on the bus Comp.  master.  MMO potential corresponding to Zan ta.  After the transition of the digital computer to the control program for the preparation of devices for MMOs from the digital computer via bus 15, a signal is received. The request is received and trigger 30 is reset.   The training program for MMO devices provides an entry in the counters and 5 current addresses.  The words of the starting address, the size of the transmitted array.  TSVMpr and imitation of the request for the issuance of the first word from the TSVMd and TsVMpr.   The counters of each DVMd and TsVMprp are produced by two output operations.  In the first operation, the first control word USL is issued.  1, in the second - the second control word Comp.  The individual bits of the Usl are determined: Operating mode — determines what will be transferred between the digital computers — an array of information or a control command.  DVR number — the number of the DVR to which the second control word is transmitted to the MMO channel is determined.  The symptom of a DVM - determines whether the DVR is a sensor or when receiving information (it is not used when sending a control command).  Synchronization flag - determines whether synchronization of digital computers exchanging information (is not used when sending a control command).  The second control word in the first mode contains the starting address of the array of information and the number of words in the array.  The control words USLT and US2, their synchronization signals Sync US1 and SynC US2, as well as information between machine exchange are issued from the digital computer to the input of the command issuing unit 9.  Their switching in the block is provided by the output signals of the analysis block 1, coming over the buses 29 and 30 to the input of the block 9 for issuing commands.  The potentials on these buses provide transmission of control words and information through the element 86 and further through receivers 7 to the information buses 33 of the highway, and synchronization signals through the elements 93 and 9 and transmitters 99 and 100 to the control buses 3 of the highway.  When issuing USl1, the number of the digital computer through the information buses 33 of the highway enters the control unit 2 of all devices on the comparison circuit.  JHa to the second group of inputs of the 4k comparison circuit is set the number of the corresponding digital computer.  In the selected for the exchange of digital computers, the numbers are compared and from the output of the comparison circuit, the trigger S is set to one state and then one of the clock pulses (TI) trigger 6, the potential from the output of which the reception of the Digital Character (sensor-receiver) is allowed and Signs of synchronization correspond to the triggers 7 and 8.  From the outputs of three hells 6 and k7 on the element I 50, a signal CMD-pr is formed, which, entering the digital computer, determines whether the selected digital computer will work on the input or output of the array.  The output potential of the trigger 8 on the element And 73 generates a signal On.  p. which enter block 3, connects a control strobe gate to one of the buses of the main bus 3.  ex. , on element 72, a signal is generated On.  sync which, entering block 3, ensures synchronization of the clock grids of the DVMd and TsVMprp.  When US2 is output to block 2 by the selected DVM element And 66 and shaper 7b, a PSCCH MMO signal is generated, which provides for recording in the counters k and 5 of the initial address and the value of the information transmitted between. selected digital computers.  After the MMO DVMd and TsVMpr channel is prepared by the DVMd program, a request is sent to the bus 10 of the trunk. Request to DVRd (the purpose of generating a signal is not shown on the drawings), through which I.B.V. its operation is for one cycle, and from the RAM cell the address of which is written on counter 4, the first word of the array is output.  The latter, via transmitter 62, is outputted to one of the bus lines, and on element 6, a sync signal is generated.  inf.  MMO, which is transmitted via transmitter 60 to the corresponding bus. Information in the MMO channel DSPC is received on register 6 by the signal PCRG MMO, formed in block 2 of the control DVMpr on element Ib7 from the signal. Sync  inf.  IMO.  Simultaneously signal request to TsVMprr through.  Receiver 58, Elementals I 70, OR 77 Posufat in the DVRM as a signal I-IN Request, causing the programMVR to be stopped.  In this case, a signal is sent from the DVRM of the D-PR MMO interrogation on the element 65 and a signal is generated for the MCRMMO, which reads the contents of the information register 6 into the RAM of the DVRM at the address specified in counter A.  At the same time, the same signal through the element I 68 and the transmitter 61 is fed to the corresponding bus 3 of the line as a signal. The request to CMD to issue is barely.  blowing a word of information from a digital computer.  The change in the state of counters i and 5 is performed by the falling edge of the signal. The D-Pr IMO poll.  After the last word of the array of information has been transmitted by the word counters at the DVMd and at the CMVp, the End of the signal signal is generated, by which the equipment of the MMO channels TsVMd and TsVMpr is reset.  From this point on, the exchange between other digital computers of the system is permitted.  Command transfer mode, control.  The control command transfer mode provides the transfer of a control command to interrupt the current program between any two digital computers connected to the common trunk.  Issuing a control command is performed by two output operations.  In the first operation, the first control word US1 is issued, the individual bits of which define the mode indicator and the number of the DVR into which the control command is transmitted.  The second control word contains the transition command, co.  holding the opcode and the jump address.  The mode indication is received by the Sync US1 signal in the trigger 8k of the command output unit 9.  The element OR 95 at the input of the element And 0 of the analysis unit 1 establishes the inhibitory potential for all of the lowest-priority digital computers.  Simultaneously, the bus Sost, master.  MMO is set to Transmit 98 via transmitter 98, Control words are transmitted through AND 86 (at its control input).  resolving potential) and transmitters 7 to common information store 33, and signals Sync US1 and Sync US2 through the elements And 93, 9 and transmitters 99 and 100 arrive at the corresponding. common control bus 3.  Resetting the trigger 8 and releasing the common mainline is generated by the signal formed on the driver 97 from the trailing edge of the sync signal.   When issuing a control command, a situation may arise when the common trunk is engaged in transferring an array of information between two other digital computers of the system.  In this case, information code buses and synchronization signals, all digital computers that are not participating in the exchange, are disconnected from the common information line on the And 86 element by the potential from the output of the And 85 element, t.  e.  when the bus 29 is set to a prohibitive level of potential, and on the bus 30 is resolving.  The same potentials on the elements And 93, 9 are disconnected from the control buses of the common highway Signals Sync Compr, Sync. p usl2.  When issuing a command to control the signal Sync US1 via the element 87 and 87, the trigger 80 records the mode indicator and simultaneously registers 78 receive US1.  In the next operation, the Sync signal Cl2 through the elements of the 88 and the register 79 is received by the Cl2 and at the same time the trigger 81, After is set to one. This TSVMD continues its program not to wait for the release of the common highway.  After the motorway has been released (on bus 30, the potential level is forbidden, and on bus 29 - allowing) by the leading edge of the Strobe signal, sync.  the state of the trigger 81 is written to the trigger 82, the output potential of which goes through the element OR 95 to the input element AND 0 of the analysis unit 1 and prohibits accessing the common highway of the lower-priority digital computer.  At the same time, the four transducer 98 on the bus. State Master, MMO is set to Zanto state.  The corresponding clock pulses (TI ensure that trigger 83 is set to one state and, after some time, is reset.  The output signal of the trigger 83 through.  Element And 89 provides for the transmission of the control command by Usl from register 78 to the input of the transmitters 7 and further to the trunk information buses, and through the I element 92 and the transmitter 99 of the Sync signal Comp.  . The shaper 96 from the trailing edge of the output signal of the trigger 83 generates a read gate US2 from the register 79 and is transmitted through the AND 90 element to the trunk information buses, and through the AND 91 element and the transmitter 100 a Synx UPL2 signal is output.  After issuing US2 by shaper 96 A reset signal is generated for block 9 for issuing commands to its initial state and bus Sost, master, MMO y. set to Free.  When issuing the US1, the number of the DVM via the information buses 33 of the highway enters the comparison circuit kk of the control units 2 of all interfaces.  In the second group of inputs of the +4 comparison circuit, the number of the corresponding digital computer is set. In the digital computer selected for the exchange, digital computer numbers are compared.  With a sign of the mode and the Sync US1 signal on the And 52 element, a recording signal is generated, which with the trigger E fixes the result of the comparison of the digital computer numbers.  The output signal from the trigger k3 and the signal Sync Usl2 on the element And 7 and the shaper 75 generates the signal of the PCPSK, which records the transition command from the trunk information bus 33 to the command register 10.  The same signal is a sign of a caprrgrammed interrupt command (NC).  After receiving the NK feature in the digital computer, a command interrogation signal is output from it via bus 27, which is provided for reading the command in the digital computer and translating it to the appropriate program.  Thus, the device provides for the transfer between the digital computers of both the mass BOB information and the control commands via information and control buses of the common highway.  Invention Formula 1.  A device for interfacing a computer with a trunk by auth, st.  No. 907536 is different in that, for the purpose of expansion.  functional capabilities of the device due to the possibility of exchanging commands between the trunk subscribers, a command issuing unit and a command register are entered into it, the first group of outputs of the command issuing unit is connected to the transmitter inputs of the group, and the input group is a group of information inputs of the device, the first input, connected to the device sync input, the second input and output, respectively, to the third output and the fifth input of the line state analysis block, and the second group of outputs and the third input to The corresponding control bus lines, the group of command register inputs are connected to the outputs of the group receivers, and the group of outputs is a group of information outputs of the device, the first input of the command register is connected to the fifth output of the control unit and the device request output, and the second input to input polling device commands.   2. The device according to claim 1, which is that the command issuing unit contains two registers, n triggers, six AND elements, two pulse drivers, an OR element, a group of AND elements, and three transmitters, the output of the first AND element being connected to the first input of the second element And, the second input of which and the first inputs of registers are connected to the group of inputs of the block and the first input of the third element I, the output connected to the second input of the first register and the first input of the first trigger, the output of which is connected to the first input of the fourth element nta AND, the output connected to the second input of the second register and the first input of the second trigger, the output of which is connected to the first input of the third trigger, the output connected to the first input of the fourth trigger and the first input of the OR element, the second input of which is connected to the output of the fifth trigger Hera, and the output - to the output of the block and the input of the first transmitter, the outputs; registers are connected respectively to the first inputs of the fifth and sixth elements AND, whose outputs and the output of the second element AND are connected to the first group of outputs of the block, the output of the even-right trigger is connected to the second input of the fifth element And, to the first input of the group of elements And and through the first pulse shaper with the second input of the sixth element And with the second input of the group of elements And; The first and second outputs of which are connected respectively to the inputs of the second and third transmitters, the third input to the second input of the third element I, the first input of the fifth trigger and the first bus of the first input of the block, the third output through the second pulse shaper to the second inputs of the first, second , the third and fifth triggers, the fourth input - with the second input of the fourth element And the second bus of the first input of the block, and the fifth input - with the first bus of the second input of the block and with the first input of the first element And, the second input of which ene to the second bus of the second inputs of the block and to the third in sodas third AND gate and a third trigger, fourth input of which is the third input unit, third input of the fifth flip-flop coupled to a corresponding bus unit inputs the group of transmitters outputs are second group unit outputs. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 907536, cl. G 06 F 3/0, 1980 (prototype) .. Indu. Mho On generator one F (/ r.1 CfTJpoS. . Comp. master.mmo R , Y t FIG. 2 N j 1 hr 1% I I i i sc I ji “:: N : s e to