Dual mode disk controller

Details Dual mode disk controller Dual mode disk controller

1983-06-16

1989-03-07

Heckler, Thomas M.

Boots, shoes, and leggings

369 48, 369 93, 360 48, 360 50, G06F 1300, G06F 728, G11B 509

Patent

active

048112801

ABSTRACT:
A dual mode disk controller is disclosed for use between a host processor and its storage medium for controlling data transfer to and from the storage medium. The data is formatted on the medium in two distinct formats, one capable of bulk fast transfers useful in a swapping operation, and the other capable of periodic slower transfers as is acceptable for file retrieval. The disk controller is designed having a small fast buffer memory for accepting information from the storage medium. File transfer data is transferred immediately without host CPU intervention, to a larger cache memory. The host CPU accesses the fast buffer memory periodically to retrieve swap transfer data while only accessing the larger cache memory when it needs to retrieve the file formatted information.

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patent: 4513392 (1985-04-01), Shenk
patent: 4539605 (1985-09-01), Hoshino et al.

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