Browse Prior Art Database

Test Unit Classification Scheme for Concurrent Diagnostics

IP.com Disclosure Number: IPCOM000102646D
Original Publication Date: 1990-Dec-01
Included in the Prior Art Database: 2005-Mar-17
Document File: 2 page(s) / 65K

Publishing Venue

IBM

Related People

Benignus, DM: AUTHOR [+3]

Abstract

A method is described that stages the impact of diagnostics. This method employs three levels of tests, which allows the system to be diagnosed in degrees. The categories are:

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 52% of the total text.

Test Unit Classification Scheme for Concurrent Diagnostics

       A method is described that stages the impact of
diagnostics. This method employs three levels of tests, which allows
the system to be diagnosed in degrees.  The categories are:

      Shared Tests The tests in this category are non-destructive and
can be run at any time without disrupting the system.  Examples of
tests in this category are error circuitry testing, CRC checks of
Read-Only Memory, and selective functional tests, such diagnostic
reads, writes, and verification.

      Sub-component Testing The tests in this category apply to
multiplexed resources.  Multiplexed resources contain logical
functions or devices, which are individually controlled by the
operating system.  Physically, the resource has to be engineered such
that separate chips are used to logically group the resource into
functions which can be individually controlled by the operating
system as devices. For example, an 8-port RS232 card has 8 RS232
adapters.  These chips can be individually diagnosed without
interfering with the operation of the other chips.  Sole access to
the chip being tested is required, but the other chips can be used in
their normal capacity.  The common logic that ties each of the
devices together is not included in this category, since all of the
devices would then be impacted.

      Full Resource Testing The tests in this category impact the
entire resource. Exclusive access to the entire resource must be
granted to...