SU1522226A1 - Multichannel device for interfacing users with two common trunk lines - Google Patents

Abstract

The invention relates to computing and can be used to arbitrate subscriber requests for the capture of one of two common highways of a multi-machine computing system. The purpose of the invention is to reduce the amount of equipment by reducing the number of lines of the common highway. The device contains a counter 1, five triggers 2-5, 17, four elements OR 10-13, two delay elements 14, 15, element 16, one-shot 18, the inputs of request 19 and the removal of request 20, the synchronous input 21, the outputs of request confirmation 22, 23, common line 24, the input of the initial installation 25. The essence of the election is that in the negative half-cycle of synchronization information on the employment of one highway is output to the common line, and in the positive half-period on the occupation of another highway of the system. 1 il.

Description

The invention relates to computing and can be used to arbitrate subscriber requests for the capture of one of two common highways of a multi-machine computing system.

The purpose of the invention is to reduce the amount of equipment due to a decrease. - the number of lines of the common highway.

The drawing shows a block diagram of a single channel device.

The device channel contained 1T counter 1, triggers 2-5, elements AND 6–9t elements OR 10–13, delay elements 14–15, element 16, fifth trigger 17, one-shot (pulse shaper) 18, request and remove inputs channel request 19, 20, synchronous input 21, confirmation outputs 22 ,, 23, common line 24, initial setup input 25,

The device works as follows.

At the initial installation, the O register is entered into the trigger 15, and the K number (or another number for different channels) j is added to the 1 K-th channel counter, j head I to the installation is performed according to signal-Ilu at input 25. When requesting a capture; common line subscriber submits

the signal to input 19, while the trigger i 2 is entered 1 To release the common highway subscriber: sends the I signal to the input 20, while the trigger 2 is entered When O in trigger 2 to the input of the unit: triggers 3 , 4, a write signal 1 is given, blocking their operation at the C input.

As a result of the installation of counters 1, transfer signals in different channels from the output of counter 1 are generated in different synchronization cycles (sync pulses on line 21 can be sent after the initial installation of all channels, otherwise synchronous operation is provided after the first capture and release of the first highway by any subscription), Pulses of the transfer are formed in the negative half-cycle of synchronization, while the transfer pulse to the trigger 5 is recorded, provided that none of the highways is captured by the subscriber, in the channel of which the transfer signal was generated (K-th ka Il), otherwise, when O in trigger 3 or 4 at the output of the element OR 10, a signal is produced

0

five

0

five

0

35

40

45

cash arriving at the setup input to zero of trigger 5 and blocking its operation at the C input,

In the case of a negative half-period of synchronization, the signal from the output of the element NOT 16 through the element 9 on line 24 gives the contents of the flip-flops 4 of all channels. At the same time, in the trigger 4 of the K-th channel 1, if the K-th subscriber does not capture the first common histral, if captured, in the trigger 4 O, Since the inverse output of the trigger 4 is connected to the input of the element And 9, then on the line 24 1 , if the first highway is captured by any subscriber, if not captured, on line 24 O,

With a delay on element 15 sufficient to propagate signals from the flip-flops 4 of all channels on line 24, the transfer signal transmitted through element 7 7 appears at the C input of flip-flop 4, in which O is recorded, if on line 24 O, t . The first general highway is free, and if. in the trigger 2 1, since the K-th subscriber requires the capture of the highway. If it is common, i. on line 24, the state of the flip-flops 4 is maintained. When writing O to trigger 3 (4) at the output of the element OR 10, the installation level in O of trigger 5 is generated, while its operation at the C input is blocked,

In the positive half-cycle of synchronization through the elements of AND 8, the contents of the triggers 3 of all channels are output to line 24, and in the trigger of 3 K-th channel O, if the K-th channel captures the second common highway and I, if it doesn’t capture the second highway, way, in the positive half-cycle of synchronization on the line if the second trunk is captured

50

55

 R

on any subscriber. If in the negative half-cycle of synchronization the trigger of the 5th Kth channel is entered by 1 and the Kth channel is not captured by any of the trunks (t, e, in the triggers 3, 4, P), then in the positive half-cycle of synchronization at the output of the And 6 element the signal transmitted with a delay on element 14 to the C input of the trigger 3 (the delay is sufficient to distribute information from the triggers 3 of all channels over the common line 24), while the trigger 3 records, with O, if the Kth subscriber requires

5152

/ line capture (1 in trigger 2) and if on line 24 O, i.e. the second line is free. If the highway is busy, i.e. on line 24 I, the state of the triggers 3 does not change. Regardless of the results of the arithritis, the signal from the output of the delay element 14 through the signal OR 12 at the input of the machine to the zero of the trigger 5 receives a zero reset signal. When the Km captures the second common trunk, a confirmation signal is output to output 23.

with the first input of the third element I, with the second input of the first element I and with the input of the element NO, the output of which is connected to the second input of the second and the first input of the fourth element I, the outputs of the first and second elements I are connected respectively to the first and second inputs of the second element OR, the request input and the input of the request. The device channel request is connected respectively to the installation inputs to 1 and to 0 to 4

On the leading edge of each sync trigger, the output of which the pulse in trigger 17 is fixed is occupied by the first highway, if the first common highway is occupied by the first half positive synchronization period, then 20 1 is recorded in the trigger 17, if not, O after the release of the first common line at the output of the trigger 17, a level difference occurs, on which the single-vibrator 18 produces a pulse 25 of the installation of the counter 1 in the initial state (record of the K number),

with the installation inputs of the first and second triggers, the outputs of which are connected respectively to the capture confirmation outputs of the first and second channels of the device channel, the initial installation of which is connected to the first inputs of the third and fourth elements of the S1I, the outputs of which are connected respectively to the installation input to O the fifth trigger and with the record entry input, the information input and overflow output of which are connected respectively to the input of the device priority code of the device and the synchronous input of the fifth trigger, The output of which is connected to the second inputs of the third and fourth elements And, the outputs of which are connected respectively to the inputs of the first and second delay elements, the output of the second delay delay is connected to the synchronous input of the second trigger, the synchronous input of the first trigger is connected to the second input of the third element OR whose third input is connected to the output of the first element OR, the output of the third trigger is connected to the input of the pulse shaper, the output of which is connected to the second input of the fourth e The OR input information of the first trigger is connected to the pty logical unit of the device, the outputs of the second elements OR of all channels of the device are combined according to the Mounting OR scheme and connected to the information inputs of the first, second and third triggers of all channels of the devices.

Claims (1)

Invention Formula A multichannel device for interconnecting subscribers with two common highways, containing K channels (K-number of subscribers), each of which contains a counter, from first to third triggers, HE element, per. The first and second elements, the first input of which is connected to the first input of the element I and the output of the first trigger, the output of the second trigger is connected to the second input of the first element OR and the first input of the second element AND, characterized in that in order to reduce the volume of equipment by reducing the number of lines of the common highway, each channel of the device additionally contains fourth and five triggers, pulse shaper, third and fourth And elements, first and second delay elements, from the second to the fourth terminals OR, and the device channel synchronous input is connected to the counting input of the counting of the trigger, the output of which is connected0 5 0 five 0 five 0 with the installation inputs of the first and second triggers, the outputs of which are connected respectively to the capture confirmation outputs of the first and second channels of the device channel, the initial installation of which is connected to the first inputs of the third and fourth elements of the S1I, the outputs of which are connected respectively to the installation input to O the fifth trigger and with the record entry input, the information input and overflow output of which are connected respectively to the input of the device priority code of the device and the synchronous input of the fifth trigger, The output of which is connected to the second inputs of the third and fourth elements And, the outputs of which are connected respectively to the inputs of the first and second delay elements, the output of the second delay delay is connected to the synchronous input of the second trigger, the synchronous input of the first trigger is connected to the second input of the third element OR whose third input is connected to the output of the first element OR, the output of the third trigger is connected to the input of the pulse shaper, the output of which is connected to the second input of the fourth e The OR element, the information input of the first trigger is connected to the bird's logical unit of the device, the outputs of the second OR elements of all the device channels are combined according to the Mounting OR scheme, and connected to the information inputs of the first, second and third triggers of all device channels.