sp;    = $37;   { enum adapters }
  NCB_UNLINK    = $70;   { unlink remote boot code }
  NCB_SENDNA    = $71;   { send, don''t wait for ACK }
  NCB_CHAINSENDNA=$72;   { chain send, but don''t wait for ACK }
  NCB_LANSTALERT= $73;   { lan status alert }
  NCB_ACTION    = $77;   { enable extensions }
  NCB_FINDNAME  = $78;   { search for name on the network }
  NCB_TRACE     = $79;   { activate / stop tracing }

{ NCB return codes }

  NRC_GOODRET     = $00;    { good return
                              also returned when ASYNCH request accept
ed }
  NRC_BUFLEN      = $01;    { illegal buffer length                   
   }
  NRC_ILLCMD      = $03;    { illegal command                         
   }
  NRC_CMDTMO      = $05;    { command timed out                       
   }
  NRC_INCOMP      = $06;    { message incomplete, issue another comman
d  }
  NRC_BADDR       = $07;    { illegal buffer address                  
   }
  NRC_SNUMOUT     = $08;    { session number out of range             
   }
  NRC_NORES       = $09;    { no resource available                   
   }
  NRC_SCLOSED     = $0a;    { session closed                          
   }
  NRC_CMDCAN &