VMS Help PASCAL, Predeclared Routines, Allocation, BITNEXT  *Conan The Librarian (sorry for the slow response - running on an old VAX)

  The BITNEXT function returns an integer value that indicates the
  number  of bits that would be allocated for one component of the
  specified type in a packed array or if  the  specified  variable
  appeared as a cell in a packed array.

  Syntax:

     BITNEXT( x )

  The parameter 'x' can be a variable or any type identifier.