functions in df3.i - _

             _df3_read(file, address, expr)  
 
       -or- _df3_read, file, address, variable;  
     Read unformated, binary data from FILE at offset ADDRESS (must be a  
     scalar long integer).  On return, ADDRESS is incremented by the size of  
     the data read.  The third argument gives the data type and dimension list  
     of the array to read.  If called as a function, the argument EXPR may  
     either be an expression or a variable which is filled with the data read  
     and is returned as the result of the call.  If called as a subroutine,  
     the third argument should be a predefined variable.  
interpreted function, defined at ./df3.i   line 26  

             _df3_write(file, address, expr)  
 
     Write unformated, binary data from FILE.    
     On return, ADDRESS is incremented by the size of  
     the data written.  The third argument gives the data to be written.  
       
interpreted function, defined at ./df3.i   line 96