number-of-pages

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

    Number of Alpha or I64 pagelets. The number-of-pages argument is
    the address of a quadword integer that specifies the number of
    contiguous Alpha or I64 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 or I64 pagelets.