Extended digit notation allows you to express integer values  in
  terms  of  a base number.  VSI Pascal accepts numbers in bases 2
  through 36.

  Syntax:

     [[ + | - ]] base-number#[[']]extended-digit[[']]

  The 'base-number' specifies the base of the number.

  The 'extended-digit' specifies the notation that is  appropriate
  for the specified base.

  You can use extended-digit notation in the same way you use  the
  conventional integer notation, with the following exceptions:

   o  Extended-digit values cannot be used as labels.

   o  Extended-digit notation for INTEGER objects cannot  be  used
      to  express  numbers  outside the range of 0 to MAXINT.  (To
      express signed numbers, place the unary plus operator (+) or
      the  unary  minus  operator  (-)  in  front of the notation;
      setting or clearing the high order bit does not set or clear
      the sign bit.)

  VSI Pascal allows the  use  of  spaces  and  tabs  to  make  the
  extended-digit notation easier to read.  To use spaces and tabs,
  enclose the extended digit in single quotation marks (' ').  The
  following are integer values in the extended-digit notation:

       2#10000011
       2#'1000 0011'
      32#1J
     -16#'7FFF FFFF'