Flexible processor-driven SCSI controller with buffer memory and local processor memory coupled via separate buses
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United States of America Patent
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Apr 14, 1998
Issued Date -
N/A
app pub date -
Jan 25, 1996
filing date -
Jun 26, 1992
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invented controller is the combination of: an intelligent interface to a SCSI bus, a multi-port 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.
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