SU1411728A2 - Multichannel priority device - Google Patents

Abstract

The invention relates to computing and can be used in distributed information processing systems for organizing the material exchange of digital computers with a large number of subscribers. The purpose of the invention is to increase the reliability of the device by preserving the possibility of spreading a polling signal in the absence of one of the channels for the duration of the subscriber’s failure. The device contains channels 1.ll.n, elements AND-HE 2, 3, element AND 4, elements NOT 5, 6. Improving the reliability of the device is achieved by increasing the number of links between channels, the polling signal propagating from the j-th channel c (Z + O th, which ensures the preservation of working capacity in the absence of the jth channel. 1 Il.

Description

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The invention relates to computing, can be used in distributed information processing systems for organizing a mainline exchange of 1 VM with a large number of subscribers and is an improvement of the device according to author, | No. 862142.

A: The purpose of the invention is to increase the reliability of the device by preserving the possibility of spreading the polling signal in the absence of one of the channels for the duration of the subscriber's malfunction.

I The drawing is a schematic of the jCTBa device.

The device contains n channels 1.1-1, n, first 2 and second 3 elements AND-NOT, element 4, second 5 and first 20 | 6 elements NOT, n request inputs 7.1t 4-7.p, n outputs 8.1 -8.p and entry 9 of the survey.

The device works as follows.

i In the initial state, the signals for Requests on inputs 7.1–7, n, and the interrogation signal at input 9 are absent. In this case, at the second input of the first elements AND-NOT 2 of all channels there is a potential of a logical unit permitting the passage of the request signal, and at the second input of the element 4 there is a zero inhibitory potential.

When a request signal is received at the input of the i-ro channel 7.1 (), where i is the channel number, a zero potential appears at the output of the NES-2 element of the i-ro channel; the input potential is NOT 6 and the second input of the NAND element 3. In this case, a single permissive potential is established at the second input of the And 4 element of this channel.

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priority than the (i +) -th channel, since at the first input of the AND 4 (i + 1) -th channel element there is a zero potential coming from the output of the HE element of the 5th (i + 1) -th channel. Further propagation of the interrogation signal is prohibited by the presence of a zero potential at the first input of the NAND element of the 3 (i + 1) -th and all subsequent channels.

In the absence of one of the channels, for example, 1. 1., the interrogation signal from input 9 goes to the third inputs of AND 4 and AND-NOT 3 elements of the second channel, and then the device operates in the same way with preserving the priorities of channels with lower numbers (in the drawing) before channels with large numbers.

The device maintains operability even in the absence of several, but not adjacent channels, since the interrogation signal propagates from the -th to the (J + 2) -th channel.

If it is necessary to ensure operability in the absence of several adjacent channels, the output of the NOT element of the 5 (j + 1) -th channel must be connected to the inputs of the AND 4 and AND-NOT 3 (J -f 3) -th, (J + + 4) elements th, etc. channels with a corresponding increase in the number of inputs of the elements AND 4 and AND-NOT 3.

Claims (1)

Invention Formula Multichannel priority device according to the author, St. No. 862142, characterized in that, in order to increase reliability by maintaining the ability of the polling signal to propagate in the absence of one of the channels for the duration of the subscriber’s failure, the polling input device is connected to the third input - When a signal is fed to input 9 by the interrogations of the AND element and the second element, it successively propagates the –N – N of the second channel and the output of the second via the polling circuits to the i-ro and the elements of the NOT j-ro channel (j-2, .., n-2, (i + 1) -th channels, but the signal is allowed where n is the number of channels), is connected to This appears only at the output of the third inputs of the AND element and the second 8 .1 of the 1st channel with the higher, th AND-NOT (j + 1) -th channel, , Compiled by G.Ponomareva Editor V. PetrashTehred L, OliynykKorrektor M, Vasilyeva priority than the (i +) -th channel, since at the first input of the AND 4 (i + 1) -th channel element there is a zero potential coming from the output of the HE element of the 5th (i + 1) -th channel. Further propagation of the interrogation signal is prohibited by the presence of a zero potential at the first input of the NAND element of the 3 (i + 1) -th and all subsequent channels. In the absence of one of the channels, for example, 1. 1., the interrogation signal from input 9 goes to the third inputs of AND 4 and AND-NOT 3 elements of the second channel, and then the device operates in the same way with preserving the priorities of channels with lower numbers (in the drawing) before channels with large numbers. The device maintains operability even in the absence of several, but not adjacent channels, since the interrogation signal propagates from the -th to the (J + 2) -th channel. If it is necessary to ensure operability in the absence of several adjacent channels, the output of the NOT element of the 5 (j + 1) -th channel must be connected to the inputs of the AND 4 and AND-NOT 3 (J -f 3) -th, (J + + 4) elements th, etc. channels with a corresponding increase in the number of inputs of the elements AND 4 and AND-NOT 3. Invention Formula Multichannel priority device according to the author, St. No. 862142, characterized in that, in order to increase reliability by maintaining the ability of the polling signal to propagate in the absence of one of the channels for the duration of the subscriber’s failure, the polling input