VMS Help System Services, $FAOL 64 (Alpha Only), Arguments  *Conan The Librarian (sorry for the slow response - running on an old VAX)

 ctrstr_64

    OpenVMS usage:char_string
    type:         character-coded text string
    access:       read only
    mechanism:    by 32- or 64-bit descriptor-fixed-length string
                  descriptor
    The 32- or 64-bit address of the control string (64-bit or 32-bit
    string descriptor).

 outlen_64

    OpenVMS usage:word_unsigned
    type:         word (unsigned)
    access:       write only
    mechanism:    by 32- or 64-bit reference
    The 32- or 64-bit address of the quadword that contains the
    output length, in bytes, of the fully formatted output string.

 outbuf_64

    OpenVMS usage:char_string
    type:         character-coded text string
    access:       write only
    mechanism:    by 32- or 64-bit descriptor-fixed-length string
                  descriptor
    The 32- or 64-bit address of a character string descriptor that
    points to the output buffer into which $FAOL_64 writes the fully
    formatted output string.

 quad_prmlst_64

    OpenVMS usage:vector_quadword_unsigned
    type:         quadword (unsigned)
    access:       read only
    mechanism:    by 32- or 64-bit reference
    The 32- or 64-bit address of a quadword-aligned array of quadword
    FAO arguments.