Communications: electrical – Digital comparator systems
Patent
1974-09-06
1976-11-02
Ruggiero, Joseph F.
Communications: electrical
Digital comparator systems
G06F 300
Patent
active
039900550
ABSTRACT:
An improved control system for a plurality of magnetic disc storage devices which connects one of said devices to a central processing unit for the transmission of data records to or from the central processing unit. The improvement comprises a unit logic controller connected to each disc storage device for receiving and storing priority control information and sector address information associated with a seek operation for a data record address. The unit logic controllers raise an alert signal when the data record address being sought is near the read-write head. The disc storage device having the highest priority associated with its alert signal is connected to the central processing unit for the transfer of data records by the control system. The improved control system requires that the central processing unit be connected to the disc storage device and the unit logic controller for the minimum amount of time during the process of locating a desired data record.
REFERENCES:
patent: 3312951 (1967-04-01), Hertz
patent: 3355718 (1967-11-01), Talarczyk
patent: 3408632 (1968-10-01), Hauck
patent: 3587058 (1971-06-01), Butler et al.
patent: 3629860 (1971-12-01), Capozzi
Fujimoto Akira
Gaw Stanley E.
Henderson Edward E.
Cleaver William E.
Ruggiero Joseph F.
Sowell John B.
Sperry Rand Corporation
Truex Marshall M.
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