System for selectively shifting groups of bits for temporary sto

Details System for selectively shifting groups of bits for temporary sto System for selectively shifting groups of bits for temporary sto

1977-05-11

1979-04-24

Brown, Thomas W.

H04Q 354

Patent

active

041513754

ABSTRACT:
In order to improve the utilization of a memory in an electronic processor of a telephone exchange, serving for the temporary storage of one or more 4-bit groups (referred to as quartets) in zones of 16-bit capacity, a concentration unit in the input of a logic network and an expansion unit in the output thereof are controllable to switch incoming quartets from any group position to the position of the lowest-ranking group, or pair of groups, and to switch outgoing quartets from the lowest-ranking position, or pair of positions, to other group positions. The logic network is an arithmetic unit receiving the quartets from a data memory, or from a set of working registers serving for the storage of intermediate calculation results; the outgoing quartets are fed to the data memory, to the working registers, or to a buffer register connected to a control input of the arithmetic unit.

REFERENCES:
patent: 3965458 (1976-06-01), Borbas et al.

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