SU1411765A1 - Device for interfacing computer with common trunk line - Google Patents

Description

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The invention relates to computing and can be used in computing systems with a common backbone.

The purpose of the invention is to increase reliability and reduce the volume of equipment by reducing the number of lines of the common highway.

Fig, 1 shows a block diagram of the device; in fig. 2 is a diagram of a node for capturing a highway in fig. 3 is a diagram of a highway release unit.

The device contains pickup units 1 and release 2 of the highway ;, register 3, decoder 4, triggers counter 3, element OR 12, elements 13 and 14, group) 5 unplugged elements, common trace 16 of the tracking signal, vsod 17 signs of emergency release of the trunk, output 18 of the readiness indication of information for transmission, group I of elements 19, switch 20, common line 21, information common highway 22, information input 23 ;, request 24 of the indication of the presence of the request, the first 25 and this is a swarm of 26 synchronous inputs, read control input 27, op 28 input 28, output 29 confirmation of the seizure of the highway output 30 confirming the readiness of reception, the first input 31 and the first 32 and second 33 outputs of the node of the seizure of the highway, the second input 34 of the capture node ma 35, the third 35 and the second 36 and the first 39 inputs and the first 37 and second 38 outputs of the release highway and information output 4b.

Node 1 capture line (Figo) 40 contains a register 41, the counter 42 ,. element And 43 and trigger 44 „

The node 2 release of the highway (FIGURE) contains the counter 46 and the trigger 47.

The device works as follows.

The request for seizure of the trunk is set by the subscriber (computer) to input 24 (I), giving a signal to input 25. At the same time, the trigger 5 is written when the common trunk is occupied in trigger 7 and I is recorded, and the arbitration process of the subscriber's requests to seize the common highway is blocked. In this case, the signal from the output of the trigger 7, fed to the input of the installation of the counter 42, in all channels, the counters 42 are set by the contents of the

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gistrov 41 relevant channels. The codes recorded in the registers 41 of all channels are different from each other. When the input signal 34 is set, the counting mode of the counters 42 is blocked. When the common trunk is released into the trigger 7, the entry O is written and the decentralized procedure of arbitrating the subscriber requests (computers) for seizing the common highway begins, as if the setup signal was removed from the input 34, the counting mode of the counters 42 is unlocked. During the arbitration procedure, the transfer signals of the counters 42 are generated for. different channels at different points in time (at different times of arbitration)} s — by which the simultaneous seizure of the common trunk by several targets is excluded.

When the transfer signal is generated by the counter of the 42 K-th device, if the K-th subscriber does not require the capture of the trunk (in the 5 K-th channel O flip-flop), then the R-input of the flip-flop 44 receives the signal from the output of the flip-flop 5 , write 1 to trigger 4 does not occur. If during the formation of the transfer signal by the counter of the K-th channel in the trigger 5, 1 is recorded (the kth subscriber needs to capture the trunk), then i is recorded in the K-channel trigger 44 i and through the And 43 element the transfer signal of the counter is transmitted to line 21 through the element OR 12,

When writing 1 to the trigger 44 to the output 33 of node 1, the signal to provide the common trunk to the K th subscriber is made. On this signal, sent to signal output 29, the K computer is interrupted. By transferring the counter 42 via the common line 21, the channels 1 are captured in all channels connected to the common trunk and captured by the common highway and the further arbitration procedure is terminated as in the case of the single state of the trigger 7, the input 34 of the node 1 is given the lock signal of the counting mode of the counter 42.

As a result of the arbitration procedure described, the common trunk is provided to only one subscriber. After receiving the confirmation signal from output 29, the K-th subscriber starts the packet transfer procedure via the common trunk.

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To do this, it sets the address of the computer receiver to input 23 as the first word of the transmitted packet, followed by a signal at input 26, 5 According to CHFHSuiy at input 6 in the data source channel (the channel that captured the highway) to trigger 6, 0 is output The group of 15 elements of an unblocking address word through a common magnate-Ural 22 is entered into the registers of 3 all channels. According to the data tracking signal perceived by all channels, triggers 9 are entered 1, except Toroj, on the falling edge of the tracking signal triggers 10 are recorded 1, Previously, when the common highway was not available, when trigger 7 was O, trigger 10 was also set to zero since the output of the trigger 7 is connected to the R input of the trigger 10 Thus, when transmitting the first (address) word after releasing the trunk (after seizing the highway), a level difference occurs at the output of the trigger 10, and since the output of the trigger 10 is connected to the C input of the trigger 8, then by this level difference (front) the addressable channel is fixed. At the 30th time of forming the signal front at the C input of the trigger 8, the address word has time to be written to register 3 and decoded by the decoder 4 addresses. The signal at the output of the decoder 4 connected to the D input of the trigger 8, at the time of the level difference at the C input, is formed only in one addressable channel.

Upon further transmission through the line of the common highway before it is released, the drops at the output of the trigger 10 are not formed and the readdressing of the computer-receiver does not occur.

When writing 1 to trigger 8 on. The signal output 30 generates a signal causing the addressable computer to terminate. After preparing the addressable computer to receive data from the common highway, it reads the contents of register 3, giving a signal to input 27, and the register contents, 3 through a group of 19 elements I, is output to the receiver's computer mainline through output 40. The signal from input 27 is output to line 21, the signal from input 27 is outputted via AND 13 and OR 12 elements. At the signal from input 27

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the installation is also made in About the trigger 9, the signal from the line 21 makes the installation in the first trigger 6,.

The computer data transmitter, after transmitting the address word, starts polling the status of trigger 6 via the commander Iytator 205 and sends a signal to input 28. After reading out the triggering state of trigger 6, the computer transmitter starts transmitting the following words packet The trigger state 6 is perceived as an acknowledgment signal Computer receiver transmitted through the line word. When each word is transmitted, the signal at input 26 to trigger 6 is entered by O, when it reads the transmitted information from the computer receiver after it sends the signal to input 27 to trigger 6 of channel and the source is entered as I, as a confirmation signal. The computer-receiver, after receiving the next word, begins, via com-1utator 20, polling trigger 9 before it is set to one. The trigger 9 is set to the single state by the falling edge of the word tracking signal, and the Bosch terminal is addressed by the CMB as the next word reception signal in register 3. When this word is read from register 3 by the signal from input 27, the trigger 9 is set to O, and through line 21 is transmitted Confirmation signal J setting trigger & p 6, cocoa-source into one state with

To release the common trunk, the subscriber who captured it exposes O to input 24 and the tracking signal to input 255, as a result of which O is recorded in trigger 5. In this case, O is automatically recorded in trigger 44 and the signal is captured: trunk, from output 29 trigger 5 s of one unit - or zero in the level difference in trigger 47 of node 2 for releasing a gistral (FIG. 3 is recorded) (C-input of trigger 47 is connected to the output of trigger 5). With a single state of trigger 47 from output 37 of node 2 through element OR 12 on line 2 is set to Releasing a signal line c, ka at signal line 21 in all channels with the output 35 of the counter 46 is removed and the counter set signal 46 goes into countable

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mode. The increase in the contents of the account- When switched on, all channels of production 46 occurs when the input O is received in trip 5, then,

of each clock signal from input 39 "one of the machines enters the trigger 5

When the number of pulses arrives, the trigger 5 is zeroed (by

from the input 39, set when installing the signal from inputs 24 and 25 or the automatic meter 465 at its output, from the counter 11, if after

a signal is generated, the incoming overrun of the trunk has not been transmitted),

output 38 of node 2 According to the transfer signal at the transition of trigger 5 from a single

the counter 46, an entry is made;

Trigger 47 and signal clearing Lose signal Trunk release,

trunk traversal from line 21 "transmitted through line 21 to all ka setups of meters 46 are made by nalam and triggering the trigger, so that the signal for transferring counters 7 to its initial state by sig46 originated at a signal duration of 15 vnal.

on line 21, which exceeds the length of the channels, the initial confirmation signals are established (the duration of the confirmation signals is equal to the reading signal length from page 27, if necessary, the signal from 20 can be output to a line computer with a common path through a shaper of a duration — a highway containing M channels (where is a single vibrator) “By the transfer signal M — the number of subscribers connected to the output 38 of the counter 46 in all channels), one of which the contents write O into the trigger node of the trunk capture, the decoder 7 (the zero state of the triggers 7th address, the first to the fourth corresponds to the unavailability of the common high-level triggers, the element OR, the first element of the hysteral J In this case, nodes 1 of the transition TI, a group of elements of isolation, and in the arbitration mode, requests of subscribers, the entrance of the channel request is the input of the common trunk, 30 houses of the device’s channel for connecting

Counter 11 is designed to pose for the first input of the current state of noise immunity and increase the computer, and the first sync bandwidth of the general master channel is the input of the channel 11 device installation to be connected to each other. the signal on the gg line to the first clock output of the maschine, connection 21 (the installation of the counter 46 produces, is dinene, respectively, with the information in the absence of signals on the line and with the synchronous input of the first trigger 21) the output of which is connected to the first installation of the counter 1 1 j, the signal of the pod-, input of the node for capturing the trunk, is not transmitted via line 21, the 40th output, which is connected to the first one, as to the counting input of the counter of the element OR, informational 11, the sync signals from the input 39 of the channel are input, which are the inputs to the transfer output of the counter 1 of the device's form for connecting to the output signal transmitted through the data channels of the computer, And 14 to the R input of the trigger 5, 45 i- second channel sync Likewise, in the trigger 5, the recording of the device channel a for O, in the trigger 44 also the recording connection to the recording output is calculated O and the common trunk of the learning machine is connected to the inputs — when the trigger 5 is moved, the elements By releasing the group, the output of the second state from one to zero state of the 50th trigger is connected to the first input node 2, which generates a signal by releasing the first element. And, about tl and h a-. The main line is transmitted through the channel so as to reduce all channels to 21. As a result of the equipment volume, due to this, triggers 7 of all channels install and reduce the number of trunk lines; . Each channel of the device is additionally free on the gg trunk state. On the output signal, it contains the fifth and sixth mentors triggers And 14 it is possible to interrupt the ma-switch, the node releasing the data source machine, the seizing highway, the counter, and the register of the common trunk. - element And, a group of elements And, per .7

the input inputs of which are connected to the outputs of the register and the inputs of the reset decoderJ whose output is connected to the information input of the second trigger, the Koropoi synchronous input o is connected to the output of the third trigger, the installation input of which is connected to the invert output of the fourth and fourth input of the second trigger, direct output the fourth trigger is connected to the second input of the node to capture the line, the second output of which is connected to the output of the confirmation, capture, line channel of the channel output of devices for connection to the first input one interrupt of the computer and the first input of the second element I, the second input of which is connected to the transfer output of the counter, the counting input of which is connected to the first input of the trunk free node and the third channel synchronous input, which is the device request input of the device for connecting to the first clock output the computer, the output of the second element And is connected to the output of the confirmation of the emergency release of the trunk line of the channel, which is the channel output of the device for connecting to the second input is interrupted computer, and with the installation input in O of the first trigger, the output of which is connected to the second input of the highway release node, the third input of which is connected to the outputs of the OR elements of all channels combined in the MOUNTING OR circuit with the installation input of the sixth and fourth triggers of all channels and with the installation input in О of the counter of all channels, in each channel the first and second outputs of the node for releasing the main line are connected to the second input of the OR element and to the installation input at the fourth trigger, respectively, the third input nta OR is connected to the output of the first element I, the input of information reading from the channel, which is the input of the channel of the device for connecting to the reading output of the computer, is connected to the second inputs of the group of elements I, to the input of the installation in the O nth trigger and the second input of the first element And, the outputs K (k - the number of bits in the transmitted word) of the elements of separation

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groups of all channels of the device are interconnected through the INSTALLING OR circuit and connected to the information inputs of the register bits, outputs (to the + 1-th junction of the groups of all channels are connected via the INSTALLING OR circuit and connected to the synchronous fifth and third trig of the channels of all channels, the outputs of the fifth and sixth triggers are connected to the pp and second information inputs of the switch, the control input and output of which are connected 5 but to the polling input of the channel, which is the channel input of the device for connecting to the second output of the active state of the computing machine, and with the output of the sign of readiness of information for transmission of the channel, which is the input of the channel of the device for connection to the high-order bit of the input of the data of the computing machine, the outputs of the And group elements are connected

25 with the information outputs of the channel, being the outputs of the channel of the device for connecting to the lower bits of the data input of the computer, the information inputs of the third,

The 30th of the fourth and fifth triggers are connected to the bus of the logical unit of the channel, the output of the second trigger is connected to the readiness output of receiving the channel information, which is the output

25 channels of the device for connecting to the third interrupt input of the computer, the fourth synchronous input channel, which is the channel input of the device for connecting to

0 to the second clock output of the computing machine, connected to the synchronization input of the highway capture, and the highway capture node contains a register, a counter, a trigger and an AND element, an output

5 of which is connected to the first output of the main line capture unit, the second output of which is connected to the trigger output, the synchronous input of which is connected to the counter transfer output and to the first

0 input element And-, the second input of which is connected to the input of the installation on the trigger and the first input of the trunk acquisition node, the second input of which is connected to the meter control input of the counter, the information input of which is connected to the output of the register, the synchronization input of the highway capture node is connected to the input add counter unit, information input

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the trigger is connected to the level input of the logical unit of the device, and the trunk release node contains a trigger and a counter, the counting input of which is connected to the first input of the trunk release node, the second input of which is connected to the trigger sync, the output of which is connected to the first output of the release node 176510

No line, the second output of which is connected to the input of the installation at the O flip-flop and the transfer output of the counter, the input of the installation at O which is connected to the third input of the node to release the highway, the bus of the logical unit of the device is connected to the information input of the trigger.

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Claims (1)

Claim A device for interfacing an electronic computer with a common trunk, containing M channels (where M is the number of subscribers connected to the trunk), each of which contains a trunk capture node, an address decoder, first to fourth triggers, an OR element, a first And element, a group of isolation elements, the input of the channel request being the channel input of the device for connecting to the first input of the active state of the computer, and the first channel sync input being the channel input of the device for connecting to. the first clock output of the machine, respectively connected to the information and sync input of the first trigger, the output of which is connected to the first <input of the line capture node, the first output of which is connected to the first input of the OR element, the channel information inputs, which are the channel inputs of the device for connecting to data outputs computer, and the second channel clock input, which is the channel input of the device for connecting to the recording output of the computer, connected to the inputs of the isolation of the group, the output of the second of the trigger is connected to the first input of the first element-AND, which is connected with the fact that, in order to reduce the volume of equipment by reducing the number of lines of the trunk,. each channel of the device additionally contains fifth and sixth triggers, a switch, a trunk release node, a counter, a register, a second AND element, a group of AND elements, the first inputs of which are connected to the outputs of the register and to the inputs of the reset decoder, the output of which is connected to the information input of the second trigger whose sync input is connected to the output of the third trigger, the input of the installation in О of which is connected to the inverse output of the fourth and to the input of the installation in · О of the second trigger, the direct output of the fourth trigger is connected to the second stroke capture assembly line, the second output of which is connected to the output confirmation. capture channel of the channel, 15 which is the channel output of the device for connecting to the first input of the computer interrupt, and with the first input of the second element And, the second input of which is connected to the counter transfer output, the counting input of which is connected to the first input of the main release node and the third sync input channel, which is the request channel input of the device for connecting to the first clock output of the computer, the output of the second element And is connected to the output of the emergency release confirmation Ali of the channel, which is the channel output of the device for connecting to the second interrupt input of the computer, and with the installation input in О of the first trigger, the output of which is connected to the second input of the trunk release node, the third input of which is connected to the outputs of the OR elements of all channels combined according to the circuit OR with the installation input in О of the sixth and fourth triggers of all channels and with the installation input in О of the counter of all channels, in each channel, the first and second outputs of the trunk release unit are connected to the second input OR element and with the installation input in O of the fourth trigger, respectively, the third input of the OR element is connected to the output of the first AND element, the input for reading information from the channel, which is the channel input of the device for connecting to the reading output of the computer, is connected to the second inputs of the group of AND elements, with the input of the installation in O of the fifth trigger and with the second input of the first element AND, the outputs K (K is the number of bits in the transmitted word) of the isolation elements of the groups of all channels of the device are interconnected through the circuit OR OR and connected to information inputs of the Kth digits of the register, outputs (κ + 1 of the isolation element of the groups of all channels are connected via the “OR” circuit and connected to the sync inputs of the fifth and third triggers of all channels, the outputs of the fifth and sixth triggers are connected to the first and second information the inputs of the switch, the control input and output of which are connected respectively to the input of the channel polling, which is the channel input of the device for connecting to the second output the active state of the computer, and with the output of the sign of readiness info P2 for transmitting the channel, which is the channel input of the device for connecting to the senior bit of the computer data input, the outputs of the elements and groups are connected 25 to the channel information outputs, which are the channel outputs of the device for connecting to the lower bits of the computer data input, information inputs of the third, 30 fourth and fifth flip-flops are connected to the channel bus logic unit, a second flip-flop output coupled to an output channel information receiving readiness being output channel ₅ d y troystva for connection to a third input of the interrupt of the computer, fourth the clock channel being the channel input device for connection to 40 to the second clock output of the computer, connected to the line capture sync input, the line capture node contains a register, counter, trigger, and AND element 45, the output of which 45 is connected to the first output of the line capture node, the second output of which is connected to the output of the trigger, the sync input of which is connected to counter transfer output and with the first 50 input of the And · element, the second input of which is connected to the installation input at 0 flip-flops and the first input of the line capture node, the second input of which is connected to the control input a counter having an information input coupled to the output of the register, the clock node capture line connected to the input counter unit adding an information input 1411765 10 trigger is connected to the input of the logical unit level of the device, and the trunk release node contains a trigger and a counter, the counting input of which is connected to the first input of the trunk release node, the second input of which is connected to the trigger input of the trigger, whose code is connected to the first output of the release node trunk, the second output of which is connected to the input of the installation in О of the trigger and with the output of the transfer of the counter, the input of which is 0 is connected to the third input of the release node of the trunk, the bus of the logical unit troystva connected to the data input of the flip-flop. 32 33 Figure 2