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SPD I/O Bus ERROR Injector and Detector

IP.com Disclosure Number: IPCOM000057206D
Original Publication Date: 1988-Apr-01
Included in the Prior Art Database: 2005-Feb-15

Publishing Venue

IBM

Related People

Authors:
Cowan, BM McKinney, CN Rubino, GR [+details]

Abstract

A Bus Test Vehicle (BTV) is used to inject and detect errors on the SPD I/O bus. The tool works as described in the following. ERROR INJECTOR: Input/output (I/O) fault isolation and error recovery hardware and microcode in a processor using a SPD bus can be tested by creating exceptional conditions on the bus with this test tool. The SPD bus error injector is a microprocessor-controlled test tool that has been designed to attach to the SPD bus in the same manner as any SPD I/O bus unit. When receiving bus information for injection synchronization, or when actually driving an error on the bus, the hardware conforms to the SPD bus architecture. There are three principal types of errors generated by the injection hardware: parity errors, sequence errors and the architected bus time-outs.