Function  00h   Terminate Program 
      Ends program, updates, FAT, flushes buffers, restores registers 
entry   AH      00h 
	CS      segment address of PSP 
return  none 

note 1) Program must place the segment address of the PSP control block in CS  
	before calling this function.                        
     2) The terminate, ctrl-break,and critical error exit addresses (0Ah, 0Eh,  
	12h) are restored to the values they had on entry to the terminating 
	program, from the values saved in the program segment prefix at  
	locations PSP:000Ah, PSP:000Eh, and PSP:0012h.  
     3) All file buffers are flushed and the handles opened by the process are  
	closed.  
     4) Any files that have changed in length and are not closed are not  
	recorded properly in the directory.  
     5) Control transfers to the terminate address. 
     6) This call performs exactly the same function as Int\20.
     7) All memory used by the program is returned to DOS.