Library /sys$common/syshlp/sysgen.hlb SHOW, /CONFIGURATION, Description  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    The SHOW/CONFIGURATION command shows devices by name, number of
    units, nexus number, and adapter type, as well as by control and
    status register (CSR) and vector addresses. You can specify an
    output file with the /OUTPUT qualifier.

    Note that you can remove a device from the middle of the floating
    addresses without completely redoing jumpers to the CSR and
    vector addresses of the remaining devices by following these
    steps:

    1. Modify your site-independent STARTUP.COM file to invoke the
       command file specified with the /OUTPUT qualifier instead of
       entering an AUTOCONFIGURE ALL command.

    2. Enter the SHOW/CONFIGURATION/COMMAND_FILE/OUTPUT command to
       format and save the device data. If you must bring the system
       down for service and remove a board, SYS$SYSTEM:STARTUP.COM
       invokes your output file as a command procedure when the
       system reboots, and the system automatically configures UNIBUS
       devices and MASSBUS devices for you.

    Remember that a new version of SYS$SYSTEM:STARTUP.COM is
    provided with each major release, so you would need to repeat
    any modifications you have made to SYS$SYSTEM:STARTUP.COM after
    you install the new version.

                                   NOTE

       Although this technique can offer a convenient short-term
       solution, use AUTOCONFIGURE ALL when possible.