Terminates the processing of files and reels/units with optional rewind and locking where appropriate. For record sequential
               files, the terms "reel" and "unit" are interchangeable; the treatment of sequential disk files is logically equivalent to
               the treatment of a file on tape or similar sequential media. 
               	 
               
                   
                     		   
                     		   
                     		   
                     		  
                      
                        			 
                         
                           				
                           | Opcode | Operation | File Type | 
 
                        		  
                      
                     		  
                      
                        			 
                         
                           				
                           | 80 | CLOSE | L S R I | 
 
                        			 
                         
                           				
                           | 81 | CLOSE WITH LOCK | L S R I | 
 
                        			 
                         
                           				
                           | 82 | CLOSE WITH NO REWIND | L S | 
 
                        			 
                         
                           				
                           | 84 | CLOSE REEL/UNIT | L S | 
 
                        			 
                         
                           				
                           | 85 | CLOSE REEL/UNIT FOR REMOVAL | L S | 
 
                        			 
                         
                           				
                           | 86 | CLOSE REEL/UNIT WITH NO REWIND | L S | 
 
                        		  
                      
                     		
                  
                 
               	 
            Input Fields
               	 
            
 
            	 
            None
               	 
            
 
            	 
            Output Fields
               	 
            
 
            	 
             
               	 
               
                   
                     		   
                     		   
                     		  
                      
                        			 
                         
                           				
                           | fcd-file status | File status |