Device and method for distributing information in a computer sys

Details Device and method for distributing information in a computer sys Device and method for distributing information in a computer sys

1990-10-01

1993-03-23

Fleming, Michael R.

Boots, shoes, and leggings

3642384, 3642601, 364DIG1, 36492692, 364DIG2, 395725, G06F 1200

Patent

active

051971437

ABSTRACT:
A pipelined multi-staged logic control device for controlling the movement of information between a number of storage devices and a host computer. The pipelined multi-staged logic control device resides in a controller having a first and a second data bus wherein each of the data buses can access up to four drive ports. Information can flow through either of the data buses to any one of the eight total drive ports. A pair of indentical integrated circuit chips are each coupled individually to a single state machine. Each of the integrated circuit chips act in concert with their associated state machine to examine the state of the drive ports and to decide if a requested drive port can be accessed. The present invention is extremely fast due to the use of state machines. While a pickup head is locating information on a storage device, other requests for information are checked during this time to determine whether additional requests can be satisfied during the pickup head's locate time.

REFERENCES:
patent: 4453211 (1984-06-01), Askinazi et al.
patent: 4600990 (1986-07-01), Gershenson et al.
patent: 4607328 (1986-08-01), Furukawa et al.
patent: 4805090 (1989-02-01), Coogan
patent: 4825406 (1989-04-01), Bean et al.

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