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  Interrupt:   21h     Function:   67h
 
  Title:       Set Handle Count [Version 3.3+]
 
  Description:
 
     Sets the maximum number of files and devices that may be opened
     simultaneously using handles by the current process.
 
     Input                              Output
 
     AH = 67h                           If function successful
     BX = Number of desired handles       Carry flag: clear
 
                                        If function unsuccessful
                                          Carry flag: set
                                          AX = Error code
                                    -♦-