Kingston Technology MC133PD manual Hardware Issues, Model 80 -- 20 MHz

Appendix C: Troubleshooting 35

Hardware Issues

In the several years that the MicroMaster, and now, the MCMaster product line have been in existence, we've accumulated a fair amount of experience with what problems might arise. While no manual can cover every possible contingency, we can cover the most frequently encountered problems here.

System Compatibility Issues

This section describes known problems with various PS/2 systems, and fixes.

Model 80 -- 20 MHz

Some early Model 80 planars do not support busmastership. Needless to say, this creates problems for the MCMaster. IBM has issued two different ECA's (engineering change announcements) ECA #048 and ECA #031, which cover a specified range of planars. Customers who have any of these systems should contact either their dealer or IBM service and have updated planars installed.

Problem 20 MHz systems can be identified in two ways:

By System Board part number: System boards FRU number (part number) 90X7390 or 33F8415, or with no FRU number label, will have the problem. (The FRU number is located near the rear edge of the system board near slots 3 and 4.)

By System Serial Number: Systems with serial numbers equal to or below the following:

Model	System serial number
Systems manufactured in the U.S.
8580-111	72-6101500
8580-121	72-9015000
8580-311	72-6553500
8580-321	72-9215500
Systems manufactured in Australia.
8580-121	90-3100250
8580-321	90-3400600
Systems manufactured in Scotland
8580-M21	55-00LFVW0
8580-X21	55-00WMZ45
8580-111	55-00F6001
MCMaster User’s Guide - Rev. B06	Kingston Technology Company