Main storage access priority control system that checks bus conf

Details Main storage access priority control system that checks bus conf Main storage access priority control system that checks bus conf

1988-09-19

1991-12-17

Lee, Thomas C.

Boots, shoes, and leggings

36493146, 36493151, 36493541, 3649551, 36424291, 36424292, 3642555, 3642543, G06F 1318, G06F 1336, G06F 1206

Patent

active

050738712

ABSTRACT:
An access priority control system for a main storage for a computer, for controlling a signal transmission to the main storage upon receiving a plurality of storage access requests from at least one processor related to the main storage. The system includes a first access request port unit for holding at least temporarily a segment address of the storage access requests from the processor; a first control unit responsive to the output of the first access request port unit for checking bus conflict conditions and prohibition conditions for a destination storage segment determined by the address of the storage access request; a second access request port unit responsive to the output of the first control unit for holding at least temporarily an intra-segment address of the storage access request; and a second control unit responsive to the output of the second access request port unit for checking logical storage busy conditions in the storage segments.

REFERENCES:
patent: 4212057 (1980-07-01), Devlin et al.
patent: 4314335 (1982-02-01), Pezzi
patent: 4395753 (1983-07-01), Comfort et al.
patent: 4445174 (1984-04-01), Fletcher
patent: 4875161 (1989-10-01), Lahti

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