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       AFFECT, GENPAT Package


       AFFECT ("pattern_date", "ident", "value");


                 :  pattern date which may be either : integer (absolute date)
                 or + integer (relative date, the date of the current  pattern
                 (last  modified  using INIT or AFFECT) is the reference). All
                 dates are supposed to be expressed  in  the  same  time  unit
                 which may be set only once using SETTUNIT.

       ident     Either  the  name of a bused signal or a scalar. Vectors must
                 be referenced with their names only,  or  bit  per  bit.  For
                 example,  if b(3 downto 0) exists, you can affect "b", "b(3)"
                 or "b 3".  Path-name  must  be  specified  by  the  syntax  :

       value     The  value  associated  with the signal which may be either a
                 based number (ex. binary: 0b011 ,hexa:  0x3F, octal: 0o56) or
                 a  decimal number. Unknown value (value where a '*' appears),
                 can be used when dealing with an output, a signal, a register
                 or  an input/output when this last one is to be tested.  Star
                 ('*') can appears everywhere  in  a  BASED  number,  but  the
                 result  will  be  a "full star" value. (For example, "0B0*10"
                 and "0B***" would give the  same  result.)  AFFECT  is  doing
                 automatically the transformation of the value into a "forced"
                 value or  a  "tested"  value  except  for  the  bidirectional
                 connectors  affectation.  When  and  bidirectional  is  to be
                 tested, a '?'  character  must  be  added  before  the  value
                 (example : "?0x45f*" instead of "0x45f*").


       "Affect" a value to a signal. This value will be apllied to the signal,
       at the specified simulation date, until the end of  the  simulation  or
       until a new value is affected to the signal. Beware : Inputs have to be
       affected at the begining of the simulation (first pattern at 0 ps).  By
       default,  signals (except Inputs) are affected with a "full star" value
       at the first pattern.

       This fonction also set the current pattern.


       AFFECT ("5", "b", "0B1");
       result :            b
       <      5 ps> :.....1...;

       At simulation date 0 ps the signal b(3 downto  0)  receives  the  value
       "0001".   This value will be kept until the end of the simulation if no
       more affectation is made.

       AFFECT ("0", "b", "0B0");
       AFFECT ("2", "b", "0B1");
       result :            b
       <      0 ns> :.....0...;
       <      2 ns> :.....1...;


       genpat(1), pat(5)

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