MicroVAX 3100 Firmware Upgrade

This FCO covers the upgrade procedure for MicroVAX 3100 Models 30, 40, and 80 from firmware version V1.1 to V1.2. The V1.1 firmware contained bugs affecting NVRAM data retention on Halt, SCSI self-test functionality, TSZ07 self-test results, and LA120 console performance. The procedure details system preparation, removal of the system enclosure and relevant mass storage shelves, removal of the DHW4x option logic board (if present), replacement of the two EPROMs, and required post-installation verification tests. It also includes instructions for applying new CPU board revision level markers and specific requirements for handling hardware components to avoid electrostatic damage.