SU1322283A1 - Multichannel device for servicing interrogations - Google Patents

Abstract

The invention relates to automation and computing and can be used in data exchange and processing systems as a distribution device. The purpose of the invention is to increase the speed of the device by generating a signal enabling the service without searching for the corresponding channel. The multichannel device for servicing requests contains the OR elements, the trigger, the AND elements, the pulse generator, the majority element, the priority setting unit, the group of channels containing the counter, the decoder, the I. elements, and the majority element is added to the device; and in the channels - the element And and the element OR. 2 Il. (L

Description

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

The purpose of the invention is to increase speed.

Figure 1 presents the block diagram of the device; FIG. 2 is a block for setting priorities.

The multichannel device for servicing requests contains elements OR 1 and 2, trigger 3, elements AND 4-6, pulse generator 7, majority element 8, priority setting block 9, channels 10 and each channel have a counter 10, a decoder 11, an AND-NOT element 12 , element OR 13, elements AND 14 and 15, informational device outputs 16, device interrupt output 17, generator output 18

to

15

It enters service devices. If the servicing device is occupied, the proposed device waits for its release. If the serving ycTpofiCTBO is free, it responds by sending a polling pulse to input 20, which, depending on the number of requests in the device, passes to the output of either the elements 5 and 6 or 6.

Suppose that at the moment of arrival of the pulse at the input 20 in the device there was one signal from the source of the request requiring interrogation. Then, at the output of the major element 8, a zero signal, which through the inverse input of the element And 5 opens it, and the signal from input 20 passes to that output 16, which corresponds to the request.

After the pulse passes to the corresponding 7, the device's request inputs 19, the optional output 16, the source of the request, the device's growing input 20. Block 9 removes the signal from the corresponding Dani priorities (figure 2) contains inputs 19,

tumbler registers 21, driver If at the moment of arrival of a pulse for 22 single pulse, switch 23.

The priority setting unit 9 is for storing priority codes25.

input 20 in the device was bole

a single signal from the sources of requests at the output of the majority element 8 yields a single signal that will open the element AND 6. Then the signal from the input 20 sets trigger 1 to the single state. The signal from the single output of the trigger 3 will open the element And 4 and the pulses from the output of the generator 7 will be fed to the counting inputs of the counters 10, the inputs of the elements And 15.

Comrade channels and their issuance of inputs

counters 10 all channels after the change

chl

priority codes.-

The priority codes are changed by pressing the switch 23 and issuing the pulses to the shaper 22. The closed (open) state of the toggle switches of the registers 21 corresponds to a zero (single) signal.

In the initial state, all memory elements (counters 10, trigger 3)

one signal from the sources of requests, at the output of the majority element 8, a single signal that opens the AND 6 element. Then the signal from the input 20 sets the trigger 3 to the single state. The signal from the single output of the trigger 3 will open the element And 4 and the pulses from the output of the generator 7 will be fed to the counting inputs of the counters 10, the inputs of the elements And 15.

For each pulse, the codes in the counters 10 are reduced (with the subtracting counters: Sakh) or increased (with the totalizers) by one. This continues until

45

are in the zero state. In block 0, the counter 10 of one of the channels (whose priority is higher), having a request, will not generate the code of the most senior

priority. I

At the same time, at the output of the decoder 11, according to Wits, there is a single signal that will go to the corresponding input of the element AND-NOT 12 of its channel. A zero signal appears at the output of this element. If the same codes were recorded in several counters, the zero signal at the output of one of the elements AND-NOT 12 is in accordance with a random law.

The zero signal from the input of the element AND-NOT 2, acting on the inverse input to the elements 15, opens it to prokhoda Yes pulses from the output of the element 4. After that, the next impulse to pass through the setting of priorities sets the necessary priority codes, after which a synchronization signal is issued, which the element OR 2 enters the synchronous inputs of the counters of all channels. Over a sync signal, priority codes are written to counters 10. i

The contents of counters 10 can be changed during device operation. The decoders 11 are configured only on the code of the highest priority.

If the servicing device needs to be addressed, the source of the requests puts a request in the form of a level at the corresponding input 19. If there is at least one request, an output 17 appears, which

55

five

ry enters the service devices. If the servicing device is occupied, the proposed device waits for its release. If serving. ycTpofiCTBO is free, it responds by sending a polling pulse to input 20, which, depending on the number of requests in the device, passes to the output of either the elements of AND 5 or AND 6.

Suppose that at the moment of arrival of the pulse at input 20, the device contained one signal from the source of requests requiring polling. Then at the output of the majority element 8, the zero signal, which through the inverse input of the element And 5 opens it, and the signal from the input 20 passes to the output 16, which corresponds to the request.

After the passage of the pulse to the corresponding, if at the moment of arrival of the pulse to

five

input 20 in the device was over

chl

35

one signal from the sources of requests, at the output of the majority element 8, a single signal that opens the AND 6 element. Then the signal from the input 20 sets the trigger 3 to the single state. The signal from the single output of the trigger 3 will open the element And 4 and the pulses from the output of the generator 7 will be fed to the counting inputs of the counters 10, the inputs of the elements And 15.

For each pulse, the codes in the counters 10 are reduced (with the subtracting counters: Sakh) or increased (with the totalizers) by one. This continues until

details are on output 16 and on the input of the item GIS 2, from the output of which will go to the reset input of trigger 3 and on the falling edge will bring it to the zero state.

In addition, the pulse from the output of the element OR 2 will pass to the clock inputs of the counters 10, thereby allowing them to restore the priority codes from the outputs of block 9 to set the arrivals. The zero signal at the single output of the trigger 3 closes the element And 4. The cycle of operation (service) ends there.

Claims (1)

Formula invented and A multichannel request service device containing the first and second OR elements, a trigger, the first and second AND elements, a pulse generator, channels, and in each channel a counter, a decoder, an AND element and a first AND element, with the device's request inputs connected to the inputs the first element OR, the output of the second element OR is connected to the reset input of the trigger, the output of the pulse generator is connected to the first input of the first element AND whose output is connected to the counting inputs of the counters of all channels whose information outputs are connected to the inputs of the decryptors of their channel; the interrogation input of the device is connected to the direct input of the second element AND; the output of the channel decoder is connected to the first input of the AND-NOT element of its channel; the output of the AND-NOT element of each channel is connected to the corresponding inputs of the AND-NOT elements the remaining channels, the output of the NAND element of each channel is connected to the inverse input of the first element AND of its channel, the second input of the first element AND is connected to the output of the first element And, the third input of the first element And each channel is connected to the same input The device's trigger input, the trigger output is connected to the second input of the first element AND, characterized in that, in order to increase speed, a third AND element, a majority element, a priority setting unit, and a second AND element, are entered into the device, and the the device inputs are connected to the inputs of the majority element, the output of which is connected to the inverse input of the second element I, the output of which is connected to the first inputs of the second elements AND channels, the outputs of elements AND channel are connected to the inputs OR of its channel, the outputs of the OR elements of the channels are the outputs of the device and are connected to the input group of the second element OR whose output is connected to the synchronization inputs of the counters of all channels, each request input of the device is connected to the second input of the second AND element of the same channel, the output of the third AND element connected to a single trigger input, the interrogation input of the device is connected to the first input of the third element And, the output of the majority element is connected to the second input of the third element And, the output of the synchronizer and the priority setting unit is connected to the input of the second OR element, the information outputs of the priority setting unit are connected to the information inputs of the channel counters, the output of the first OR element is the device interrupt output.   . 4 (l1 (puz.Z Compiled by M. Kudr Shev Editor P. Gereshi Tehred L. Oleinik Proofreader N. Korol Order 2865/45 Circulation 672 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