Firmware and Hardware Problems on Current Revisions of KD560 Module

This document serves as a Field Change Order (FCO) for all VAXft model 810 systems. It identifies several issues with existing KD560 modules, including unterminated 'checker' chip inputs causing false errors, a CPU Flash ROM auto-reboot bug on Zone A, and incorrect error register masks. To resolve these, the FCO mandates replacing current KD560 modules (54-21081-01) with fully upgraded revision H modules (54-21083-01). The document provides a detailed, non-rolling installation procedure that requires a full system shutdown, comprehensive pre-installation checks, specific ESD safety measures, and post-installation functional verification.