On-board diagnostic sub-system for SCSI interface

A device adapter with an on-board diagnostic capability for a SCSI controller is provided by a gate array driven by a microprocessor on board the adapter. The gate array has data and control inputs driven from the micro-processor and data and control outputs which are dot OR'ed with correspondi...

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Bibliographic Details
Main Authors KEENER; DON S, SCHEIERN; KEVIN L, MCNEILL; ANDREW B
Format Patent
LanguageEnglish
Published 16.07.1991
Subjects
CALCULATING
COMPUTING
COUNTING
ELECTRIC DIGITAL DATA PROCESSING
PHYSICS
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Summary:A device adapter with an on-board diagnostic capability for a SCSI controller is provided by a gate array driven by a microprocessor on board the adapter. The gate array has data and control inputs driven from the micro-processor and data and control outputs which are dot OR'ed with corresponding in/out terminals of the SCSI controller. A reset signal from a SCSI bus forms a further input to the gate array. For testing purposes the micro-processor detects the gate array inputs to simulate a fault-free or faulty device. The micro-processor detects the response of the SCSI controller to the device simulation and thereby can determine the state of health of the SCSI controller.
Bibliography:Application Number: US19890364363