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LOOP Power-On-Self-Test Diagnostics

IP.com Disclosure Number: IPCOM000039453D
Original Publication Date: 1987-Jun-01
Included in the Prior Art Database: 2005-Feb-01
Document File: 1 page(s) / 12K

Publishing Venue

IBM

Related People

Baier, KJ: AUTHOR

Abstract

In order to completely test an IBM Personal Computer (PC) Convertible system in loop mode for intermittent problems, a method was required to utilize the Power-On-Self-Test (POST) in the system read-only memory (ROM) without duplicating the POST code on the Advanced Diagnostic diskette. The Power-On-Self-Test is a diagnostic test that is resident in the system ROM. The POST is designed to test the base system and feature functionality when the system is powered on, or the Ctrl, Fn, and Del keys are pressed. The POST performs only testing that does not require user interaction, intervention, or long execution time. The Advanced diagnostics are diagnostic tests that are resident on the Advanced Diagnostic diskette.

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LOOP Power-On-Self-Test Diagnostics

In order to completely test an IBM Personal Computer (PC) Convertible system in loop mode for intermittent problems, a method was required to utilize the Power-On-Self-Test (POST) in the system read-only memory (ROM) without duplicating the POST code on the Advanced Diagnostic diskette. The Power-On- Self-Test is a diagnostic test that is resident in the system ROM. The POST is designed to test the base system and feature functionality when the system is powered on, or the Ctrl, Fn, and Del keys are pressed. The POST performs only testing that does not require user interaction, intervention, or long execution time. The Advanced diagnostics are diagnostic tests that are resident on the Advanced Diagnostic diskette. These tests are used to test system and I/O functions that require user interaction, intervention or long execution time. The Advanced diagnostics are loaded into system random-access memory (RAM) from the Advanced Diagnostic diskette in drive A. The diagnostic tests are required to have the capability of detecting intermittent problems on the system. In order to accomplish this, the Power-On-Self-Test and the Advanced diagnostics must both be executed continuously until an error is detected. Running the POST only in loop mode or the Advanced diagnostics only in loop mode will not completely check out the base system and feature hardware. To resolve this problem, a new option called "LOOP POST/DIAGNOSTICS" has been added to the Advanced Diagnost...