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

       /XMI[=BIindex]

    Specifies that device addresses that are currently mapped in
    the I/O space for the XMI bus are displayed. The /XMI qualifier
    also displays node and nexus numbers and generic names of all
    processors, adapters, VAXBI adapters, memory controllers, and
    interconnection devices such as the NI.

    Use of the SHOW/XMI=BIindex command requires the CMEXEC
    privilege.