Controller for controlling access to a plurality of records that

Details Controller for controlling access to a plurality of records that Controller for controlling access to a plurality of records that

1983-07-21

1986-01-28

Springborn, Harvey E.

Boots, shoes, and leggings

G06F 1516, G06F 1206

Patent

active

045675627

ABSTRACT:
A controller for controlling access to a plurality of records that can be accessed and changed by several independent processors comprises: a plurality of flip-flops corresponding in number to the plurality of records with each flip-flop representing a particular record; a circuit for receiving a programmable control word from any of the processors which identifies multiple records of which access is sought; a circuit for selecting in parallel and logically ANDing output signals from all of those flip-flops which correspond to the identified records; a circuit for sending a signal, if the ANDing operation yields a logical ONE, to the processor which sent the control word signaling that it may access and change the identified records; a circuit for setting in parallel via a single pulse all of those flip-flops which correspond to the identified records if the ANDing operation yields a logical ONE; and a circuit for storing the control word if the ANDing operation yields a logical ZERO.

REFERENCES:
patent: 3348210 (1967-10-01), Ochsner
patent: 3449722 (1969-06-01), Tucker
patent: 3469239 (1969-09-01), Richmond et al.
patent: 3528061 (1970-09-01), Zurcher
patent: 3528062 (1970-09-01), Lehman et al.
patent: 3560934 (1971-02-01), Ernst et al.
patent: 4015242 (1977-03-01), Anceau et al.
patent: 4394727 (1983-07-01), Hoffman et al.
patent: 4404628 (1983-09-01), Angelo

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