SU1453411A1 - Device for interfacing subscribers with electronic computer - Google Patents

Abstract

The invention relates to computing and can be used, for example, in computing systems for organizing the exchange between subscribers and computers. The purpose of the invention, - a group of elements And 5, 7 clock pulses com-. shadow is a reduction in hardware costs and an increase in the functionality of the known device. The goal is achieved by the fact that the device containing the first and second elements OR 1 and .2, the element NOT 3, the generator mutator 8 and the distributor 6 impulses, is entered the element AND NOT 4. The device has advanced functionality that is implemented c: relatively lower instrumental costs. It is possible to carry out software polling from the computer side of the subscriber readiness inputs for device exchange according to the Algorithm in combination with the hardware polling cycle. 1 pe. (L

Description

The invention relates to computing and may be used, for example, and computing systems for organizing the exchange between subscribers and computers.

The purpose of the invention is to reduce hardware costs and expand the functionality of the device.

The drawing shows the functional diagram of the device.

The device consists of the first 1 second 2 elements OR, the element H 3, the element AND-NOT 4, the elements of the AND 5 group, the distributor 6 pulses of the generator 7 clock pulses, the switch 8, the input 9 of the initial installation of the device, the address inputs 10 of the device, the input II resolution recording device, bus 12-15 communication with a computer, a group of input 16 and output:

17shire connections with subscribers and inputs

18 subscribers ready to exchange device

The distributor 6 pulses contains the counter 19 and the decoder 20.

The generator 7, when a single signal appears at any of its inputs, stops the output of clock pulses to the counting input of the distributor 6.

The device works as follows;

In the initial state, all the outputs of the distributor b are in the zero state. There is no information exchange on us 12-15 with a computer, potot-gu through elements 11PI 1 and NOT 3 to the input of the element AND-NOT 4 receives a signal of a logical unit, and to another input of the element AND-NOT 4 - a signal of a logical zero from the output element OR 2. Thus, at the inputs of elements AND 5 from the output of the element AND-NOT 4 signal of a logical unit. When pulses are received from the generator 7 to the counting input of the distributor 6, a signal of a logical unit is formed at one of its outputs in accordance with the code recorded in the counter 19. Thus, a common unit is sequentially checked at each output of the distributor 6, producing a survey subscriber readiness inputs for device exchange. Upon detection of the readiness of one of the subscribers to exchange the device at the output of the element OR 2, an e-pulse is generated, a 1-1-1 impulse, KOTopbOi provides

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one . termination of sequential polling of subscriber readiness inputs for device exchange by disconnecting g generator 7 output from distributor 6 count input;

2. From the outputs of the elements And 5 in the switch 8 addresses, according to which the switching occurs

10 tires 12-15 computer communication with tires 16

the selected subscriber ;, resulting in the output of the element .OR appears the only signal

3. forming at the end of the J5 exchange at the output of the NAND 4 element of the zero-level signal, which through the elements of AND 5, the element of the RSI 2 enters the first control input of the generator 7, and interrupted the polling cycle

The 20 subscriber readiness inputs for the device exchange are resumed.

In the case of detection / readiness of the next subscriber to exchange information at the output of the element OR-2 again

25, a single impulse is generated that provides a consistent implementation of items 1-3. However, if the exchange between the computer and the subscriber, which was selected in the previous cycle, is not completed, then after the run. paragraphs 1 and 2, waiting is complete (- nor this exchange, and then proceeding to point 3,

A computer can interrupt the hardware cycle of the subscriber readiness survey and start a software poll using a certain algorithm by writing to the counter 19 through the address inputs 10 of the device the corresponding code of the selected user.

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Claims (1)

Invention Formula A device for comparing two subscribers with a computer, containing a switch groups of information inputs and outputs, which are the corresponding groups of inputs and codes of the device for connecting to information inputs and subscribers, the first element OR, the first - fourth inputs of which are connected respectively to the first and second information outputs and the first and second information inputs commentators and are corresponding to the first and second outputs and the first and second inputs of the device for connection to the paraphase information input and 314 the output of the computer, the element is NOT, the input is connected to the code of the first element. OR, clock generator, AND group, the second OR element and pulse distributor, the output group of which is connected to the first inputs of the AND elements, the outputs of which are connected to the switch's address input group, which, in order to reduce device hardware costs, it contains the element AND-NOT, and the output of the element is NOT connected to the first input of the element AND-NOT, the second input and the code connected respectively to the output of the second element OR and the second inputs of the elements AND group, the third inputs to which form a group of inputs for the device to connect eleven to the outputs of subscriber readiness, and the outputs are connected to the group of inputs of the second OR element, the output of which is connected to the control input of the switch and the rst input of the clock generator stop, the output connected to the sync input of the pulse distributor, the input of which is initial device setup, the pulse burner recording enable input connected to the second clock generator stop input is the device input for connecting the enable output The computer record, the information input of the pulse distributor is the device input for connecting the address output of the computer.