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Error Generator for Input Output Device Attachment

IP.com Disclosure Number: IPCOM000050609D
Original Publication Date: 1982-Nov-01
Included in the Prior Art Database: 2005-Feb-10

Publishing Venue

IBM

Related People

Authors:
Crandall, DR [+details]

Abstract

Hardware and software error handling capabilities are tested by real I/O attachment errors that normally happen at unpredictable times and that are often difficult or impossible to generate at will. An Error Generator is described that generates any error at will. This involves use of a special microcode "patch" in a diskette unit, like the IBM Model 4952 Model C unit which includes a Series/1 processor. Any error desired may be generated at any time so that error responses can be checked. The error generator patch program is loaded in advance of a debug session. The attachment will still work normally except that now an error may be generated at will, either from an attachment console stimulus or under system program control. This reduces hardware and software test time and effort.