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Verification of System Integrity by Sequential Testing

IP.com Disclosure Number: IPCOM000059917D
Original Publication Date: 1986-Feb-01
Included in the Prior Art Database: 2005-Mar-08
Document File: 1 page(s) / 12K

Publishing Venue

IBM

Related People

Clark, RE: AUTHOR [+2]

Abstract

Execution of a selected group of tests verifies machine operation including any add-on feature hardware by invoking a single test. On a system consisting of a printer and keyboard, controlled by an Intel 8088 microprocessor, with possible add-on feature hardware, a Verify test is used to give an operator an additional set of tests to determine the integrity of the system beyond what is tested during the power-on self-test sequence. The Verify test tests any add-on feature hardware and demonstrates the print-erase capability of the connected printer at all current levels of the printer. A selected group of interrupt vector locations is reserved in the RAM (random-access memory) of the 8088 microprocessor for diagnostic routine addresses. These addresses are initialized during the power-on self-test of the 8088 microprocessor.

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Verification of System Integrity by Sequential Testing

Execution of a selected group of tests verifies machine operation including any add-on feature hardware by invoking a single test. On a system consisting of a printer and keyboard, controlled by an Intel 8088 microprocessor, with possible add-on feature hardware, a Verify test is used to give an operator an additional set of tests to determine the integrity of the system beyond what is tested during the power-on self-test sequence. The Verify test tests any add-on feature hardware and demonstrates the print-erase capability of the connected printer at all current levels of the printer. A selected group of interrupt vector locations is reserved in the RAM (random-access memory) of the 8088 microprocessor for diagnostic routine addresses. These addresses are initialized during the power- on self-test of the 8088 microprocessor. Each hardware feature that is attached and has software that can be executed by the 8088 microprocessor loads the addresses of its own diagnostic routines into the interrupt vector locations. These routines can then be executed in an operator intervention mode by polling them with their unique test number passed in a register. The test which recognizes its own test number should execute. By requiring that the additional routines recognize an additional set of input parameters, they can be caused to execute sequentially by the Verify test. This eliminates the necessity for operator interv...