Accession Number : AD0683274

Title :   OPERATIONS CONTROL UNIT IN A SPECIAL PURPOSE DIGITAL CONTROL COMPUTER,

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Kossovskii,V. S. ; Guk,K. N. ; Sadovskii,L. V. ; Novikov,A. T.

Report Date : 20 FEB 1968

Pagination or Media Count : 13

Abstract : A list of instructions to be realized by the computer serves as initial data for designing the control unit which comprises a clock-pulse unit, a micro-operation control circuit, and an operation decoder. The clock-pulse unit produces pulses and sequentially distributes them among its trunks. The control circuit handles microprograms consisting of 38 micro operations (a 10-cycle microprogram table is shown). Ferrite-core circuits are used throughout. The control unit operates on a two-cycle principle (a read cycle for one group of cores serves simultaneously as a preparatory cycle for another group). The micro-operation control circuit comprises 5 core groups. The operation decoder is built on a two-step principle; first-step cores perform logical multiplication of the first three variables X1X2X3 of the operation; second-step cores, multiplication of the remaining two variables X4X5. The clock frequency can go as high as 30 kc; pulse height, 0.4 amp; pulse duration, 8 microsec. The above control unit exhibited reliable operation in conjunction with a laboratory model of a small-size control digital computer.

Descriptors :   (*DIGITAL COMPUTERS, CONTROL SYSTEMS), CONTROL SEQUENCES, LOGIC CIRCUITS, CODING, MAGNETIC CORES, SWITCHING CIRCUITS, PULSE COMMUNICATIONS, FERRITES, USSR

Subject Categories : Computer Programming and Software
      Computer Hardware

Distribution Statement : APPROVED FOR PUBLIC RELEASE