VMS Help RTL Routines, LIB$, LIB$GET_VM_PAGE_64, Arguments  *Conan The Librarian (sorry for the slow response - running on an old VAX)

 number-of-pages

    OpenVMS usage:quadword_signed
    type:         quadword integer (signed)
    access:       read only
    mechanism:    by reference

    Number of Alpha pagelets. The number-of-pages argument is the
    address of a quadword integer that specifies the number of
    contiguous Alpha pagelets to be allocated. The value of number-
    of-pages must be greater than 0.

 base-address

    OpenVMS usage:address
    type:         quadword (unsigned)
    access:       write only
    mechanism:    by reference

    Block address. The base-address argument is the address of a
    quadword that is set to the address of the first byte of the
    newly allocated block of Alpha pagelets.