VMS Help PASCAL, Lexical Elements, Character Set  *Conan The Librarian (sorry for the slow response - running on an old VAX)

  Compaq Pascal uses  the  extended  American  Standard  Code  for
  Information  Interchange (ASCII) character set.  The is extended
  ASCII character set contains 256 characters, which  include  the
  following:

   o  Uppercase letters  A  through  Z  and  lowercase  letters  a
      through z

   o  Integers 0 through 9

   o  Special characters, such as the ampersand (&), question mark
      (?), and equal sign (=)

   o  Nonprinting characters, such as the space, tab,  line  feed,
      carriage  return, and form feed (use of these characters may
      improve the legibility of your programs)

   o  Extended, unspecified characters with numeric codes from 128
      to 255

  The  Compaq  Pascal  compiler  does  not   distinguish   between
  uppercase  and  lowercase letters except when they appear inside
  apostrophes.

  For a complete listing of  the  ASCII  character  set,  see  the
  "Compaq Pascal Language Reference Manual."