INT 6A - DECnet DOS LOCAL AREA TRANSPORT - GET NEXT LAT SERVICE NAME
        AX = D500h
        DH = FFh
        ES:BX -> 17-byte buffer for name
Return: AH = 00h if successful
           ES:BX buffer filled
        AX = FFFFh if end of table or no name available
Notes:  use this function to get the names of the hosts on the network
        successive calls are necessary to get all names