number-of-pages

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

    Number of Alpha or I64 pagelets. The address of a quadword
    integer that specifies the number of contiguous Alpha or I64
    pagelets to be deallocated. The value of number-of-pages must be
    greater than zero.

 base-address

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

    Block address. The base-address argument is the address of a
    quadword that contains the address of the first byte of the first
    Alpha or I64 pagelet to be deallocated.