Flexible processor-driven control of SCSI buses utilizing tags appended to data bytes to determine SCSI-protocol phases

Flexible processor-driven control of SCSI buses utilizing tags appended to data bytes to determine SCSI-protocol phases

The invented controller is the combination of: an intelligent interface to a SCSI bus, a multi-part buffer memory manager, a formatter, and a local processor port. With the addition of a few components for the device-level interface, the invented controller along with a buffer RAM, a local processor...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Hauptverfasser: CHEN, JOE Y, YOON, TONY J, GELDMAN, JOHN S
Format: Patent
Sprache:eng
Schlagworte:
CALCULATING
COMPUTING
COUNTING
ELECTRIC DIGITAL DATA PROCESSING
PHYSICS
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Beschreibung
Zusammenfassung:The invented controller is the combination of: an intelligent interface to a SCSI bus, a multi-part buffer memory manager, a formatter, and a local processor port. With the addition of a few components for the device-level interface, the invented controller along with a buffer RAM, a local processor system, and an optional data separator completes a high performance disk, or other mass storage, controller subsystem. The invention is particularly directed to (1) the dual use of a buffer memory as data buffer storage and for storage of instructions to be executed by a SCSI-protocol processor, (2) the architecture of the interface to the SCSI bus, and (3) the instruction set of the SCSI-protocol processor.