Method of communicating with a SCSI bus device that does not have an assigned SCSI address
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United States of America Patent
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-
May 13, 2003
Grant Date -
N/A
app pub date -
Oct 2, 1992
filing date -
Oct 2, 1992
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A SCSI device resides and communicates on the SCSI bus without that device being assigned a SCSI address or corresponding SCSI ID. The driver software on the host computer directs the SCSI initiator device to select itself as its target, so the initiator then only asserts one bit of the eight bit SCSI data bus. The SCSI device determines when a SELECTION phase is under way and then determines if only one bit has been asserted on the SCSI data bus. The SCSI device then responds to the initiator as being the target device, thus completing the SELECTION phase. The initiator and the SCSI device can then communicate as a normal initiator and target would during information transfer stages of the SCSI standard. This is all done without the SCSI device occupying a normal SCSI address.
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