SU1327117A1 - Device for mating a computer to common line - Google Patents

Abstract

The invention relates to computing and can be used in multi-machine computing systems for interacting computers through a common backbone. The aim of the invention is to expand the functional capabilities of the device by providing the organization of group communication. The device contains a node 1tav trunk, register 2, triggers 3,4, elements And 5-7, two groups of trunk amplifiers 8.9, two trunk amplifiers 10.11, triggers 12-14, one-shot 15,16. The device allows, in addition to the exchange between a pair of machines, to organize multicast and broadcast data transmission, which allows to reduce the congestion of the common backbone, reduce the waiting time for service requests for machine-to-machine exchange and improve system performance. 1 hp f-ly, 2il. lOftttfJ (L with to Fi. G

Description

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The invention relates to computing and can be used in multi-computer computing systems for interacting computers through a secondary trunk.

The aim of the invention is to expand the functionality of the device by ensuring the possibility of organizing group communication.

FIG. 1 shows a block diagram of the device; in fig. 2 is a block diagram of a highway capture unit.

The device contains (FIG. 1) a trunk acquisition node 1, a register 2, triggers 15 and 3 and 4, elements 5-7, two groups 8 and 9 of trunk amplifiers, two main amplifiers 0 and 11, triggers 12-14, one-shot 15 and 16. The system has internal trunk lines 17, a common bus information bus 18, common lines 19-21, device inputs 22-27, device outputs 28 and 29, device clock input 30, output 31 of the highway pickup node 1.

Site 1 capture line soderite (Fig. 2) the counter 32, the decoder 33, triggers 34 and 35, the element 36, the element NOT 37, the trunk amplifier 38 and the installation input 39.

The device works as follows.

Before the start of the exchange, the computer initiator of data transfer (data source) exposes the requirement of capturing a common highway to the input 22 of node I of the highway capture. After the main line is captured at outputs 19 and 31 of node 1, a signal is generated and a signal (low level) is set to the line 19, and the signal is on the leading edge of line 19 (difference from high to low) on the single vibrators 16 of all devices connected to the common line 18, a pulse is generated producing resetting of the flip-flops 4. After issuing the request to capture the mainline, the computer initiator of the exchange through element 6 begins interrogation of subscription 3 of node 1. After reading out 1 of the display of the element 6, the computer initiator of exchange through group of amplifiers 8 vyd The address word is transmitted to the common trunk 1b, and the word transmission tracking signal is simultaneously connected to the line 20. The signal from line 20, which is fed to the input of the control for recording registers 2, writes the word from trunk 18

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c in registers 2 of all interfaces. The signal from line 20 records 1 in triggers 3. Thus, after the first word is transmitted, the address word is recorded in registers 2 of all devices. The address word in the K-th resolution is 1 when addressing the K-th computer. When establishing a connection with one machine in the address word there will be one 1, with a broadcast connection in all M bits of the address word there will be 1, with group communication with H machines in the address word there will be H units at the corresponding bits. On the trailing edge of the word tracking signal from line 20, recording 1 to trigger 14, forming a signal at the output of elements AND7 of devices of addressable computers (K-computer is addressed if there is 1 in the Kth digit of the register 2 containing the address word). , in the K-m device 5, the output of the K-th bit of register 2 is connected to the input of the element And 7 and the record 1 to the trigger 4.

The signal from the output of the And 7 element is written down 1 into the triggers 12 and 13. In the case of a single state of the trigger 12, the requirement for a machine-to-machine exchange is issued to the corresponding computer. At the single state of the trigger I3, through the amplifier 11, a low level (signal) is established on line 21 (in the initial state, high level is maintained on line 21). Signal line 21 is output from all addressable interface devices and is perceived as a signal of no channel setup. communication with all addressable computers. The peculiarity of the broadcast and group communication mode is the need to implement 5 computer-to-machine communication only after establishing a communication channel with all addressable machines. After receiving the request for machine-to-machine exchange, each address of the computer zeroes trigger 12. After PREPARATION: for computer-to-machine exchange, the addressable computer is zeroed by trigger 13 of its interface device (for this, it reads the contents of register 2), and the unavailability signal from the computer is removed on line 2I. The total unavailability signal from line 21 is removed when all addressable computers are ready for the exchange. All addressable computers remove the signal on line 2I, about 0

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zero triggers 13. On the falling edge of the signal on line 21 (the difference from low level to high) to the triggers 14 all interface devices are brought in (information about establishing communication channels with all addressable computers). The computer initiator of the exchange after the transfer of the address word and all addressed machines after preparation for the inter-machine exchange to identify the establishment of a communication channel with all addressable computers interrogate trigger 14 via element 5. After reading O from element 5, the source computer starts , and computer receivers - their reception. The words from the computer source are transmitted to the bus 18 through the trunk amplifiers 8 and are accompanied by a signal on line 20, outputted through the amplifier 10. On the signal on line 20, the words from the bus 18 are recorded in registers 2 of all interfaces, while triggers 3 written 1. Addressable computers with the state of flip-flops 3 (information that the word is transmitted and received in register 2) read the transferred word from register 2 via the internal line 17. At the same time, flip-flop 3. O. is recorded. At the end of the transmission of the packet, the computer-source of data releases the common trunk, issuing a signal to the input 27 of the node 1 to capture the highway. A freed trunk can be provided for the exchange of inter-control by other machines of the system.

The operation of the trunk acquisition node 1 (Fig. 2) is based on the fact that the common highway can be captured by the Km interface device only in the Kth state of counter 32, identified by the decoder 33, the Kth output of which for K- This device is connected to the input element I 36, When a signal is generated at the K-m output of the decoder, if the trunk is not captured (high level on line 19) and there is a request for machine-to-machine exchange from the K-th computer (a single trigger 34), the signal from the element NOT 37 signal from the output element And 36 is writing 1 to trigger 35 and setting a low level (line busy signal) on line 19. To release a line, the captured computer sets a signal to input 27 through which the triggers 34 and 35 nudge through the trigger.

Line 38 on line 19 is set to high (the trunk is not occupied).

Claims (2)

1. A device for coupling a computer to a common highway containing a node for capturing a trunk, two groups of main amplifiers, two main amplifiers, a register, two triggers, three elements And, the first one-oscillator, the information inputs of the main amplifiers of the first group, the outputs of the first and second elements And, the information outputs of the main amplifiers of the second group form a group of inputs-outputs of the device for connecting to the group of information inputs-outputs of the computer, allowing the trunk amplifier of the first group is connected to the information input of the first trunk amplifier and is the device input for connecting to the gate output of the computer, the first and second inputs of the logical condition of the trunk acquisition node are the device inputs for connecting to the output terminals of the trunk capture and releasing the computer trunk Respectively, the first inputs of the first and the second elements of AND are the input of the device for connection to the output of the readiness calculation request The squeeze machine, the information outputs of the trunk amplifiers of the first group and the group of information inputs of the register form a group of information inputs and outputs of the device for connection to the common bus information bus, the output of the first flip-flop is connected to the first input of the third element I, characterized in that devices by providing the possibility of organizing group communication; three triggers and a second single-vibrator are introduced into it, and the enable inputs are main The second amplifiers of the second group are connected to the zero inputs of the second and third flip-flops and are the input of the device for connecting to the reading output of the computer, the output of the second flip-flop, the zero input and the output of the fourth flip-flop are 5132711 the inputs and output of the device for connecting, respectively, to the input of the interrupt requirement, to the output request of the exchange requirement and to the input requirement of the exchange of the computing machine, the output of the first main amplifier, the input of the first one-oscillator, the single input of the second trigger the connections to the sync connection bus of the common trunk, the input-output of the trunk pickup unit, the input of the second one-way OP are the input-output and the input of the device, respectively, for connecting to the bus the common trunk, the output of the second trunk amplifier, and the synchro input of the fifth trigger are the WIEE input and the device input for connection to the common line-20 bus, the clock input of the line capture unit is the input of the device for connection to the clock bus common highway, while the second input of the second element And is connected to the 25 output node of the capture line, the installation input of which is connected to the output of the second one-vibration and the zero input of the first trigger, whose single input is connected to the second 30 input of the third element I, to the output of the second one-oscillator and to the single input of the fifth trigger, the output of which is connected to the second input of the first element I, the single input of the second trigger on the input to the input register, the group of outputs of which is connected to the information inputs of the main amplifiers of the second group, the K-th bit of the register code group (where K is the device number in the computing system) is connected 76 the input of the third element And, the output of which is connected to the single input of the fourth trigger and to the single input of the third trigger, the output of which is connected to the information input of the second main amplifier, the information input of the fifth trigger is connected to the device potential potential bus. 2. The device according to claim 1, characterized in that the node for capturing the line comprises a counter, a decoder, two triggers, the element AND, the element NOT, the main amplifier, the output of the main amplifier and the first input of the element I form the input-output of the node for capturing the line, the input of the first trigger is the first input of the logical condition of the line capture node, the zero input of the first trigger is connected to the zero input of the second trigger and is the second input of the logical condition of the highway capture node, the counter input of the connection counter The input of the counter is the installation input of the main line capture node, the output of the second trigger is connected to the information input of the main amplifier, and is the output of the main capture node. line single input of the second trigger is connected to the output of the element And, the second, third and fourth inputs of which are connected respectively to the outputs of the first trigger, decoder, element NOT, information input of the decoder oedinen yield meter. 27 22 ll J thirty Compiled by C, Pestmal Editor L. Veselovska Tehred I. Popovich Corrector T, Kolb Order 3391/46 Circulation 672 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab ,, d, 4/5 Production and printing company, Uzhgorod, st. Project, 4 fi & 2