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Failing Memory Card/Module Identification

IP.com Disclosure Number: IPCOM000039230D
Original Publication Date: 1987-May-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

A method is described to provide correlation between a memory test failure detected by the Power-On Self-Test (POST) or the Advanced diagnostics and the physical failing memory card and module. The POST is a diagnostic test that is resident in the system read-only memory (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. A memory test is included as an integral part of the POST and is executed during the POST. 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.

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Failing Memory Card/Module Identification

A method is described to provide correlation between a memory test failure detected by the Power-On Self-Test (POST) or the Advanced diagnostics and the physical failing memory card and module. The POST is a diagnostic test that is resident in the system read-only memory (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. A memory test is included as an integral part of the POST and is executed during the POST. 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 include a memory test module to allow testing of all installed random-access memory (RAM). The method by which the Advanced diagnostic memory test tracks the amount of memory tested and how this information is transformed into a usable 2-character code to identify the failing memory card and module is described. The memory test is selected via the Advanced Diagnostic Control Program. After the memory test has been initiated the Data Segment (DS) register is cleared to start the test at address 0. The Data Segment register is used to point to the block of memory to be tested and is incremented after each block has been tested successfully. When an error is detected during the me...