start

    OpenVMS usage address
    type          quadword (unsigned)
    access        read only
    mechanism     by value
    Starting virtual address in dump or system.

 dest

    OpenVMS usage address
    type          varies
    access        write only
    mechanism     by reference
    Return buffer address.

 length

    OpenVMS usage longword_unsigned
    type          longword (unsigned)
    access        read only
    mechanism     by value
    Length of transfer.

 physical

    OpenVMS usage longword_unsigned
    type          longword (unsigned)
    access        read only
    mechanism     by value
    0: <start> is a virtual address. This is the default.
    1: <start> is a physical address.