SU1354193A1 - Device for controlling priority of connecting information sources to trunk line - Google Patents

Abstract

The invention can be used in multi-machine and multiprocessor computer systems, local computer networks and systems in which the exchange of information is organized using a common backbone or ring to control the order of the exchange of information. To increase the speed, the device contains 1 request servicing blocks, a generator of 2 ring interrogation pulses, triggers 3, 9, single vibrators 4, 10, elements AND 5 and 6, elements OR 7, 11, element 8 and delay element 12. 1 Il. (L with sob ate 4 CD 00

Description

The invention relates to computing technology and can be used in multi-machine and multiprocessor computer systems, local computer networks and systems in which the exchange of information is organized using a common backbone or ring to control the turnaround;

The purpose of the invention is to show the speed of the device,

The drawing shows a block diagram of the device.

The device contains the query service units 1, a generator of 2 polling pulses. Block 1 contains a trigger 3, a single vibrator 4, elements AND 5 and 6, an element OR 7, an element NOT 8. Generator 2 contains a trigger 9, a single vibrator 10, an element of RSHI 11, a delay element 12. Also shown is the start input 13, the ring pulse generator op-input 1.4, dew, input 15 of unit 1, information source input 16, request service unit output 17, control output

18 request service, output

19 pulse generator ring survey.

. The device operates as follows.

 In the initial position, all the triggers 3 and 9 are in the zero state. At the inputs of 16 blocks 1 there are no signals from information sources. The input 13 of block 2 receives the start signal. The trigger 9 is transferred to the unit state and starts the one-shot 10, from the output of which the pulse of the ring interrogation is fed to the input of the delay element 12 and the output 19 of the generator 2, and from the last to the input 15 of the first block 1. In block 1, the pulse from the input 15 is fed to the inputs elements And 5 and 6, since the second and inputs are respectively zero and inverted on element 8 is a single signal, it passes through the open element 6, element 7 to the output 17 of this block. In this case, the trigger 3 of block 1 remains in the zero state (at the output 18 is zero potential) and in the unstressed state the one-shot 4. Similarly, the polling pulse passes through the remaining blocks 1. From the output 17 of the last block 1, the polling pulse goes to input 14 generator 2, then through

element 11 to the counting trigger input

9, sets the latter to the zero state. At this point, the previously extracted impulse from the one-shot

10, having passed through the delay element .12 and the element P, enters the counting input of the trigger 9 and sets it to the one state, thereby

0, the one-shot 10 is restarted and a new polling pulse enters the trunk.

In the case of a signal from an information source at input 16 of one of blocks 1 and arrival at input 15 of the same polling pulse unit, the signal passes through open element 5 to input of trigger 3 and sets it to one state. On

0, output 18 of block 1, a signal appears enabling service of the request received from this information source. Simultaneously, the signal from input 16 is inverted by the element

5 8 enters element 6 and closes it, not giving a polling pulse to the passage to subsequent blocks 1. When the work with the trunk is completed, the source of information is turned off, at the input

0 16 block 1 - the signal is lost. it

leads to the closure of element 5 and the opening of element 6, as well as the launch of the one-shot 4. The pulse generated by it sets the trigger 3 to the bottom (triggering of requests is denied) and through element 7 enters the trunk, giving the opportunity to service 7 other sources of information.

0 In the case when requests are serviced in the trunk, the counting input of the trigger 9 of the generator 2 comes before the signal through element 11 from the delay element 12 and

5 sets it to the zero state. The arrival of a polling pulse from input 14 through element 11 switches the trigger to one state and restarts the one-shot 10, the new pulse of ring polling goes to the trunk.

Claims (1)

Formula invented and 5 A device controlling the sequence of connecting information sources to a trunk containing N request service units (where N is the number of connected information sources 31 ), each of which contains a trigger, a single-oscillator and a NOT element, a ring interrogation pulse generator, including a trigger, a one-shot and a delay element, the output of the ring interrogation pulse generator connected to the interrogation input of the first interrogation unit, interrogation output of each interrogation service block the last one is connected to the polling input of the subsequent query service block, the polling output of the last query service block is connected to the first trigger input of the ring poll pulse generator, i- The first input of the device information source (, N) is connected to the input of the information source of the i-ro request service unit, the output resolution of which is connected to the i-th output of the device, the output of the one-vibrator of the ring-poll pulse generator is connected to the output of the ring-pulse generator, the trigger of the request service block is connected to the output of the resolution of the request service block, characterized in that, in order to increase speed, the first and second AND elements, the OR element, are entered into each request service block ring pulse generator Editor N. Bobkova Order 5695/44 Compiled by A. Mikhailov Tehred A. Kravchuk Proofreader M. Sharoshi Circulation 671 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4 541934 The element OR is entered, and the polling input of the query service unit is connected to the first inputs of the first and second AND elements, the source input of the information block of the query service unit is connected to the second input of the first AND element and to the input of the HE element, the output of which is connected to the second input and with the launch input of the one-shot, the output of which is connected to the input. Installations in О of the trigger and with the first input of the element OR, the output of the second element 15 AND is connected to the second input of the OR element, the output of which is connected to the polling output of the query service unit, the output of the first AND element is connected to the installation input of 1 trigger, the first trigger input of the ring interrogation generator is connected to the first input of the OR element, the output of the delay element is connected to the second input element OR. the output of which 25 is connected to the counting trigger input, the output of which is connected to the single-shot start input, the output of which is connected to the input of the delay element, the device start input is connected to the trigger input of the device via the second trigger input of the ring interrogation generator. 20 thirty