SU1615717A1 - Device for servicing requests - Google Patents

Abstract

The invention relates to computing and can be used in computing systems. The purpose of the invention is to expand the field of application of the device due to the possibility of changing the start of the next polling cycle after the completion of the service. The device contains a register 1, a group of elements AND 2, a group of blocks of elements AND 3, an element OR 4, a trigger 5, an element AND 6, a group of registers 7, a group of delay elements 9, a group of pulse shapers 10, a block of elements OR 11, an annular shift register 12 , delay element 8 and the encoder 13. After completing the service of the next subscriber, the device cyclically polls other sources, starting with the subscriber whose number is stored in the register corresponding to the subscriber. 1 il.

Description

The invention relates to computer technology and can be used in computer systems.

The purpose of the invention is the expansion of the scope of the device due to the possibility of changing the beginning of the next polling cycle after completion of service.

The drawing shows a diagram of the device.

The device contains a register 1, a group of elements AND 2, blocks of elements AND 3 groups, an element OR 4, a trigger 5, an element 6, registers 7 groups, an element 8 of the delay, elements 9 of the delay of the group, drivers 10 pulses of the group, block 11 elements OR, an annular shift register 12, an encoder 13, request inputs 14, a device start input 15, a clock input 16, a group of code inputs 17, a signal output 18, and information outputs 19.

The device operates as follows.

When the power is turned on, register 1, trigger 5, and all bits except the first, register 12 are reset. On individual inputs of group 14, service requests are recorded in register 1. Each subscriber is assigned their own register 7, in which the subscriber’s code is written (one of the digits contains one, the rest contains zeros), which should be polled first in the next polling cycle after completion of servicing of this subscriber. Input 16 receives clock pulses.

Upon receipt of the input 15 pulse permission polling sources trigger 5 is set to a single state, opening the element And 6, As a result, the clock pulses begin to pass through the element 14 6 to the input of the register 12, shifting along the ring recorded in it unit. If at the moment there is a unit in the same bits of registers 1 and 12, then at the output of the corresponding element And 2 a signal appears that passes through the element OR 4 to the output 18 of the device. The binary address of the detected 3 query is present on the outputs 19 of the device. The leading edge of the potential from the output of the triggered element And 2 groups passes through the corresponding driver 10 pulses, the output of which the pulse is supplied to the element 9 delay. At this point, an impulse appears at the output of the delay element 8, which sets the trigger 5 to the zero state, which leads to the locking of the And 2 elements, the Ibi element to the termination of the shifts in the register 12. After the trigger 5 is set to the zero state, the corresponding delay element 9 should work, as a result, the request is removed from the subscriber in register 1, and the code is also rewritten from the corresponding register 7 through the corresponding group of AND 3 elements and block 11 of the OR elements into register 12. Thus, in register 12 it renders A code identifying the next interrogated subscriber in a new survey cycle.

After the end of the service, a pulse is applied to input 15, and the cycle of the device is repeated.

During the operation of the device, the number of the next interrogated subscriber can change for each subscriber after completing the service of this subscriber by entering new information into registers 7 from inputs 17.

Claims (1)

Claim A device for servicing queries containing a group of AND elements, an OR element, a trigger, an AND element, and a register whose individual inputs of bits are connected to the device’s request inputs, register outputs are connected to the first inputs of the AND elements, the outputs of which are connected to the inputs of the OR element, the output of which connected to the signal output of the device, the trigger input of which is connected to a single input of the trigger, the output of which is connected to the first input of the And element, the second input of which is connected to the clock input of the device, distinguishing I mean, in order to expand the scope due to the possibility of changing the beginning of the next polling cycle after completion of the service, a group of pulse shapers, a group of delay elements, a group of blocks of AND elements, a group of registers, a block of OR elements, a ring shift register and an encoder are introduced moreover, the output of each element AND of the group through the corresponding pulse former of the group and through the corresponding delay element of the group is connected to the zero input of the corresponding discharge of the register and to the control _; the input of the corresponding block of elements AND, the information inputs of each block of elements AND groups are connected to the outputs of the corresponding register of the group, the inputs of each of which are connected to the corresponding group of code inputs of the device, the outputs of the blocks of elements AND groups are connected to the inputs of the block of OR elements, the outputs of which are connected to the inputs of the ring a shift register, the outputs of the discharges of which are connected to the second inputs of the corresponding elements AND groups, the control inputs of which are connected to the trigger output, zero which move through a delay element coupled to an output of the OR gate, the outputs of the ring shift register are connected to inputs of the encoder, the outputs of which are information device outputs.