SU690484A1 - Arrangement for shaping number check code - Google Patents

Description

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The invention relates to the field of computing and can be used in various digital input devices.

Devices are known for generating control codes of numbers containing the elements AND, OR H N and producing the control residual code modulo 3 1 |.

A disadvantage of the known devices is their hardware complexity.

The closest to the present invention in its essence is a device for generating a control code of numbers containing an addition decoder, the first and second groups of inputs of which are the first and second groups of inputs of the device, and the control input — input, ohm. and the first element AND, the control input and output of which are, respectively, the input of the availability survey, the fault and the output of the device failure.

The disadvantage of this device is concluded with its hardware complexity.

The purpose of the invention is to reduce hardware costs.

The goal is to achieve Tei, that an OR element, a second AND element and a distributor are entered into the device, with the inputs

the OR element is connected respectively to the output of the second element AND and the first output of the desch (}) of the supplement rator, the second output of which and the input of the additional so-called are connected to the corresponding inputs of the second element AND, the output of the element OR

and the input of the initial installation of the device are connected respectively to the input of the shift and the | Input of the initial installation of the distributor, the first and second outputs of which are the outputs of the control code of the device,

the third output of the distributor is connected to the input of the first element I.

The drawing shows a block diagram of the device. The device contains a decoder 1 additions, including the elements OR 2 and 3 and the elements AND 4 and 5, the element OR 6,

The first 7 and second 8 elements And, the distributor 9, the first 10 and second 11 group of device inputs, - input 12 main cycles

and an input of 13 additional clock cycles of the device; The input 14 of the initial installation and the input 15 of the presence of a poll, the outputs 16 of the control code number and the output of the presence of 17 fails

The device produces the formation of the control symbol and control the correctness of its processing. For this, the principle of the multiplicity of three is used, namely, that the value of the control symbol; must complement the number up to three. When you first enter numbers, the device generates a control character.

When calculating and transferring numbers in the device, a control letter is formed in the same way as the received control character for the three, which means correctness, is monitored. information processing and computing.

The device works as follows

Before submitting the number to the device by. input 14 is made initial installation ring three-bit distributor 9 by recording the state of three (binary code

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Further, at the time of each digit of the number Synchronized by the control clock ticks at input 12; control syntax is generated. . ;;; ,, ,,.,:,. , . :; g; :

The inputs of the first group of inputs 10 receive the numbers two, five, eight, requiring the same addition up to a multiplicity of three equal to one. Combining inputs Occurs on the element OR 2. The inputs of the second group of inputs 11 receive the numbers one, four, seven, which require addition to Kpailnost three equal to two. Combine in; before happening on the element OR 3.i

At the outputs of the elements And 5 and 4 at the time of occurrence of the clock at the input 12 form with the corresponding signals additions - one and two. The signal from the output of the element And 4 Cheroz element OR 6 is fed to the input of the distributor 9, causing a single shift. The signal from the output of the element And 5 arrives at the second element And 8 and with the help of an additional clock at the input IB, at the output of the second element And 8, two pulses go through the element OR 6 to the shift input of the distributor 9, causing two shifts.

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The value of the control symbol is formed at the outputs 16 of the distributor 9.

At the end of the processing of numbers, the device receives a signal at input 15, which is used to detect the absence of a triple in the distributor 9. A sign of the absence of a triple is the presence of a unit in the third bit of the distributor 9, the output of which is connected to the first And 7 element.

The absence of a triple is detected by a signal at output 17 with the arrival of a signal at input 15.

It should be noted that with the formation of residues modulo more than three, the number of input groups of the addition decoder, the number of bits of the distributor and the number of additional cycles increase accordingly. ..

Claims (2)

Invention Formula A device for generating a control code of a number, containing an addition decoder, the first and second group of inputs of which is the first and second group of device inputs, and the control input is the main clock input, and the first element AND the control input and output of which are respectively the polling input the presence of a fault and the output of the presence of a fault of a device, characterized in that, in order to reduce hardware costs, an OR element, a second AND element and a distributor are introduced into the device, the inputs of the OR element are connected. With the output of the second element I and the first output of the supplement deSchifter, the second output of which and the additional clock input are connected to the corresponding: the corresponding inputs of the second element AND, the output of the OR element and the input of the initial installation of the device are connected respectively to the input of the shift and the first input of the initial installation of the distributor, the first and second the outputs of which are the outputs of the control code of the device, the third output of the distributor is connected to the input of the first element I. ;;; .. /;:.- Sources of information received by the CEO attention during the examination 1. Seller F. Methods of detection in the work of the digital computer. M., “Peace, 1972. 2. USSR author's certificate, Al 511592, cl. G 06 f 11/08, 1974. THAT re