Device controller with a separate command path between a host an

Details Device controller with a separate command path between a host an Device controller with a separate command path between a host an

1990-11-13

1993-08-31

Fleming, Michael R.

Boots, shoes, and leggings

395250, 364228, 3642383, 364239, 3642397, 364260, 3642601, 364DIG1, G06F 1300, G06F 1516

Patent

active

052416305

ABSTRACT:
A SCSI bus controller which has a separate data path from the SCSI bus to the host bus and a separate command path for use to communicate with a local microprocessor. The local microprocessor is connected to a dual port RAM, the other port of which is connected to a bus master controller linked to the host system. Commands and status are passed via the dual port RAM. Data is passed through a FIFO. The local microprocessor does not have access to the data path but only controls direction of the data flow, the initiation of the sequence and the completion of the sequence.

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National Cash Register Corporation, data sheet for 53C95 SCSI controller chip, pp. 1-64; 1990.
Klueber, Chuck, Intellistor, Inc., "Combining Raid 1, 3, and 5 Arrays with a Single Controller" Sep. 18, 1989.
Imprimis, data sheet for ArrayMaster 9058 Controller, 1989.

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