SU905819A1 - Multichannel device for priority processing of requests - Google Patents

Description

(5) MULTI-CHANNEL DEVICE FOR PRIORITY SERVICE INQUIRIES

The invention relates to computing and can be used in computing systems.

A multi-channel device for servicing requests with interchangeable priority codes is known, which contains OR elements, channels, a counter in each channel, a decoder, AND elements, NOT elements.

The closest in technical essence and the achieved result to the invention is a device of dynamic priority of an electronic computer, containing a register, a decoder, a matrix of elements AND, a control unit, blocks for resolving conflict situations 2.

The disadvantage of these devices is a large amount of equipment.

The purpose of the invention is to reduce equipment.

The goal is achieved by the fact that a multichannel device for priority service of requests contains channels, and in each channel there is a register, a decoder, a group of n And elements (where n is the number of channels), an OR element, and And element, each i-th output the channel decoder is connected to the first input of the i-ro element AND group, the channel register output is connected to the channel decoder input, the channel register input is the information input of the device, the AND element outputs of the group are connected to the OR element inputs of its channel, the outputs of which are x connected to the first inputs of the corresponding elements And

15 channels, a group of (n-1) OR-NOT elements is entered, the output of the i-ro element AND of each group except the output of the n-th element of the AND group is connected to the corresponding input of i-ro and

20 subsequent elements of the OR-NOT group, the output of each element of the OR-NOT group is connected to the second input of the (i + 1) -ro element AND the group of each

the channel, the second input of the first element AND group and the third input of the second and subsequent elements AND group are connected to the corresponding request input of the device, the clock input of the device is connected to the second input of the AND element of each channel, the output of each element AND channel is the corresponding information output of the device.

The drawing shows a block diagram of the device.

The device contains channels 1, an element OR 2 channels, a group of elements AND 3 channels, elements AND 4 channels, a decoder 5 channels, a register 6 channels, information input 7 of the device, a request input 8 of the device clock input 9 of the device, information output 10 of the device, the element OR- NOT 11 groups.

The device works as follows.

When the program of assigning priorities to subscribers is executed, priority codes are recorded in the registers of 6 channels I according to the corresponding device inputs. The recorded priority codes are fed to the inputs of the corresponding decoders 5.

If the first subscriber, which corresponds to the first channel, is assigned a low priority code, for the second, an average priority code, for the third, an upper priority code, then the first element And 3 group of the first channel will be the work element for the first channel, 3 second channels, for the third - the last element And 3 groups of the third channel / ia, since unit inputs from the outputs of the corresponding decoders 5 are fed to the inputs of these elements.

In the absence of requests on the outputs of all elements OR NOT 11, there are single levels, since all elements AND 3 are closed by the inputs 8.

If a request is received from the first subscriber on the corresponding request input of the device 8, in this case, the first inputs of the AND 3 channel elements receive a single signal, which travels through the first element AND Z.a and then through the corresponding element OR 2 to the first input of the corresponding element And i. As soon as the clock input of the device 9 is given a signal, the output of the device 10, corresponding to the first subscriber, receives a single potential. Then a request comes from a third party. At the same time, a single potential appears at the output of the third element AND 3, as a result of which zero potentials appear at the outputs of the elements OR 11 NO. In this case, the first element And 3 closes. When applying the clock signal to the input 9 at the output of the device 10,

5, a single potential appears to the corresponding third party.

The use of the device reduces the amount of equipment.

Claims (2)

Invention Formula A multichannel device for priority service of requests, containing in each channel a register, a decoder, a group of p-elements AND (where n is the number of channels), an OR element and an AND element, each i-th output of the channel decoder connected to the first input of i-ro element AND of the group, the output of the channel register is connected to the input of the channel decoder, the input of the channel register is the information input of the device, the outputs of the elements AND of the channel group are connected to the corresponding inputs of the OR element of their channels, the output of which is connected to the first input elements and channels, characterized in that, in order to reduce the equipment, the device contains a group of (n-1) OR-NOT elements, and the output of the i-th element AND group of each channel except the output of the n-th element AND group of each channel is connected to the corresponding input of the i-ro and subsequent elements of the OR-NOT group, the output of each element of the OR-NOT group is connected to the second input (i + 1) -ro of the AND element of the group of each channel, the second input of the first AND element of the group and the third input of the second and subsequent elements And the groups are connected to the corresponding request input. device, a clock input device is connected to the second input of the AND gate for each channel, the output of each AND gate is the corresponding channel information output device. Sources of information taken into account in the examination 5 1. USSR author's testimony If eQlk3 (, class G06 F 9/18, 1977. 2. USSR authoring certificate No. 512 + 70, cl. GF F 9/18, 1973 (prototype).