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  Interrupt:   21h     Function:   5Eh     Subfunction:   00h
 
  Title:       Get Machine Name [Version 3.1+]
 
  Description:
 
     Returns the address of an ASCIIZ (null-terminated) string
     identifying the local computer. This function call is only
     available when Microsoft Networks is running.
 
     Input                      Output
 
     AH = 5Eh                   If function successful
     AL = 00h                     Carry flag: clear
     DS:DX = segment:offset       CH =  00h (if name not defined)
             of buffer to            <> 00h (if name defined)
             receive string       CL =  NetBIOS name number (if Ch <> 0)
                                  DX:DX = segment:offset of identifier
                                          (if Ch <> 0)
 
                                If function unsuccessful
                                  Carry flag: set
                                  AX = Error code (01h)
                                  See: ◄Error codes►
                                    -♦-