SU1432523A1 - Device for servicing requests - Google Patents

Abstract

The invention relates to computing and can be used in computer systems. The invention of the invention is a step-up of the speed of the device. The device contains groups of elements And 19, 21, elements OR 1,5,10,20, element IZ, trigger 2, counter 4, desphrator 6, pulse generator 7 and register 18, The device provides the ability to conduct a parallel search for the source of the next request during computer processing of the current request, 1 Il.

Description

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

The purpose of the invention is to increase the speed of the device.

The drawing shows the functional diagram of the device.

The device contains the element OR 1, Trigger 2 element AND 3, the counter 4,. element SH-5, decoder 6, generator-1 7. pulses, element AND 8 ele jHEH 9 delay J element OR 10, device request inputs 11, response device 12, device reset input 13, device start input 14, clock input; 15 devices (Signal output 16 of the device, group of code outputs of the device 17, server 18, Group of elements AND 19, eleijieHT OR 20, group of elements AND 21. i .. The device works as follows.

1 When switching on the power supply of the pulses from the stroke 13, the trigger 2 and the register 18 are set to the state O. At the input of T1 and the register 18., I) ocH is closed. At the input 15, the clock pulses are received.

I Requests from sources are stored in | register 18, on inverse outputs | of which, in the absence of a signal, the request is set to T, where the signal from the decoder 6 indicates the first element 21 and passing to the input of element AND B. When there is no | signal at input 14 at the time of the clock pulse signal enters | through the elements SHSh 10 and 5 to the counting: counter inputs. 4, increasing its content by one. In this case, the decoder 6 indicates the next element AND 21. After that, the device works as described until the decoder 6 points to the element 21, which captured the request signal. In this case, there is no signal from the output of the element OR 1, which stops changing the contents of counter 4. The decoder 6 thus indicates the corresponding element AND 19. When a pulse of resolution for polling the sources is applied to input 14, the trigger

2 is set to one state, the AND 19 element is opened, and the signal at the output of the OR element 20 is passed to the output 16,

The binary code of the number of the detected request that is present at the outputs 17

served on a computer for maintenance. The signal from the output of the element OR 20 sets the trigger 2 to the zero state, at the inverse output of which appears a signal permitting the search through the element AND B of the next source of the negros. By the same signal through the pulse shaper 7 and the elements OR 10 and 5, the contents of the counter 4 are incremented by one. The serviced request is removed by a pulse at the corresponding input 12. A new polling cycle by applying pulses to input 14 begins at the next detected source that sent the request.

In the event that a new polling cycle starts before the next request source is found, the search is performed by clock pulses input to input 15 through AND 3 and OR 5, which sequentially change the state of counter 4 until the request source is detected. ,, i.e. after the discovery of the First request and before the appearance of the signal at the input 14, the next request is searched for and after the appearance of the signal at the input 14, the detected request immediately passes to the outputs of the device.

Claims (1)

Invention Formula A request service device containing a register, a first group of AND elements, two OR elements, two AND elements, a trigger, a pulse shaper, a delay element, a counter, and a decoder, with the direct output of each register bit connected to the first input of the same element AND first the groups, the second inputs of the elements I and the first group are connected to the corresponding outputs of the decoder, the inputs of which are connected to the outputs of the counter and are a group of code outputs of the device whose reset input is connected to the first reset input trigger and with the reset input of the input, information inputs and reset outputs KOTopoi o are respectively a group of request and a group of response inputs of the device, the start input and the clock input of which are connected respectively to the first input of the first element And and to the single input of the trigger, the forward output is connected to the second input of the first element And the output which is connected to the first input of the first element OR, the output of which is connected to the counter input of the counter, the output of elements AND of the first group are connected to the inputs of the second OR element, the output of which is the signal code of the device and connected to the second trigger reset input It is known that, in order to increase the speed, the device contains the second group of elements AND, the third and fourth elements OR, each inverse output of the register connected to the first input of the element of the same name And the second group. the second inputs of elements AND of the second group are connected to the corresponding outputs of the decoder, the outputs of elements AND of the second group are connected to the inputs of the third OR element, the output of which is connected to the first input of the second AND element, the output of which is connected to the first input of the fourth OR element, the second input and output of which are connected respectively, with the output of the pulse driver and with the second input of the first element OR, the second and third inputs of the second element. And they are connected, respectively, with the clock input of the device and with the inverse output of the trigger. Compiled by M. Kudr Shev Editor E. Papp Tehred M. Didyk Proofreader A. Obruchar Order 5442/42 Circulation 704 VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Subscription