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Many Alpha-powered systems use the EISA bus for various low-speed legacy stuff such as the MFM controler (for floppy drives). The EISA bus must be reconfigured after erasing NVRAM, adding/removing ISA/EISA boards or when changing between OpenVMS/Digital UNIX and Windows NT. Rather than being included in ROM the software used to configure the EISA bus (the EISA Configuration Utility or ECU) is run off a floppy disk from the firmware.
Readme.txt
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The Eisa Configuration Utility (ECU) contains code which is
proprietary to Micro Computer Systems, Inc., and therfore is a royalty
bearing utility for them, and cannot be freely distributed.
If you have already purchased a copy of the ECU (or it came with your
system), you may order another copy or update as follows:
Kit number (QA-01YAA-HC) is an orderable part number for
customers who have already purchased hardware that included the
ECU and licensing and need another copy of the ECU. Kit content:
o V1.9 (AK-Q2CRJ-CA) for OpenVMS and Digital UNIX
o V1.9 (AK-PYCJK-CA) for Windows NT
If you need a full copy of the ECU including the license, you may
order the following:
Kit number (QC-01YAA-HC) is shipped with new hardware and
includes the appropriate license sticker. Kit content:
o V1.9 (AK-Q2CRJ-CA) for OpenVMS and Digital UNIX
o V1.9 (AK-QF1GC-CA) for Windows NT
Some people have ignored the above and put it on the internet. These are normally in the form of a zip archive containing the files from the disk rather than a disk image. Most notes that come with the disk contents say the volume label of the floppy disk should be "SYSTEMCFG". So, just copy the contents of the archive to a blank floppy disk and set the volume label to SYSTEMCFG and it should work.