Dynamic magnetic information storage or retrieval – Head – Core
Patent
1990-07-27
1993-09-21
Gossage, Glenn
Dynamic magnetic information storage or retrieval
Head
Core
395275, 360 69, G06F 1300
Patent
active
052476405
ABSTRACT:
A dual access control system is disclosed including a write-only memory portion for storing dual access commands issued from a host unit and unit addresses of a magnetic-disk unit, and a contention control portion for receiving coded signals representing the dual access commands and a control signal generated by magnetic-disk control portions. The contention control portion first generates a unit select tag signal for allowing the unit addresses of the magnetic-disk unit to be processed upon receipt of the coded signals and the control signal. The contention control portion then generates a tag signal and a bus bit signal which are supplied to the magnetic-disk unit upon reception of a response signal from the magnetic disk unit, a reset signal which is supplied to the write-only memory portion, a write timing signal which is supplied to a read-only memory portion and an output signal which is used to generate an interruption signal. The interruption signal is sent from magnetic-disk control portions to the host unit. The host unit recognizes the execution of the commands upon receipt of the interruption signal from the magnetic-disk control portions.
REFERENCES:
patent: 4807180 (1989-02-01), Takeuchi et al.
Gossage Glenn
OKI Electric Industry Co., Ltd.
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