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-cmdline_option REG1=value1, value2, value3, value4
-cmdline_option REG2=value1, value2, value3, value4
...
-cmdline_option REG500=value1, value2, value3, value4
...

-cmdline_option_done REG1=Value
-cmdline_option_done REG2=Value
-cmdline_option_done REG3=Value
....

-cmdline_option_done=s%

my %opt = (
    
...
   );

GetOptions(\%opt, @opt_array);