13.2.30} usrglo.f USeR GLObal settings

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     Argument list:
          
WHAT(1)
, (2), (3), (4), (5), (6) : user-given numerical parameters
          
SDUM
 : user-given character string (8 characters)

 Subroutine USRGLO is called before any other initialisation is done
 by the program, provided a command USRGCALL is present anywhere in the input.
 The calling parameters can carry any kind of useful information or can
 be used as flags to choose between different possible actions to be
 performed before any particle transport takes place.

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