High speed byte shifter error checking circuits

Details High speed byte shifter error checking circuits High speed byte shifter error checking circuits

1981-01-23

1982-09-07

Atkinson, Charles E.

Boots, shoes, and leggings

371 67, G06F 1110

Patent

active

043487424

ABSTRACT:
Apparatus for checking the correct operation of a parallel byte shifter of the type having a plurality of input ports connected to individual byte lines of a data bus. When predetermined byte lines to the byte shifters are selected, control means are provided to activate a set of shift select means connected to error checking circuits. The error checking circuits comprise logic gating means for checking the proper selection of byte lines and for storing a signal indicative of an error or absence of an input error in the error storage means. When the data byte is being transferred out or read out of the byte shifter, the error storage means is read out to determine the presence or absence of an output error from the error storage means.

REFERENCES:
patent: 3781797 (1973-12-01), Jinbo
patent: 4165533 (1979-08-01), Jonsson
patent: 4225961 (1980-09-01), Raggenbass et al.
patent: 4245344 (1981-01-01), Richter
patent: 4298982 (1981-11-01), Auerbach

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