Function 5E00h (94-0)    Get Machine Name                           . DOS 3.1

    On systems equipped with IBM PC Network or Microsoft Networks, returns
    the ASCIIZ name of the local computer.

       On entry:      AH         5Eh
                      AL         00h
                      DS:DX      Pointer to a memory buffer (16 bytes) where
                                 computer name will be returned

       Returns:       CH         0        name not defined
                                 not 0    name is defined
                      CL         NETBIOS name number (if CH not 0)
                      DS:DX      Pointer to computer name (ASCIIZ string)
                      AX         Error code, if CF is set

       Error codes:   1          Network not loaded

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    This subfunction of 5Eh returns an ASCIIZ string containing the text
    of the local computer name. The string is padded with spaces to a
    length of 15 characters.

       Notes:         If the name has never been defined, CH returns 00h
                      and CL is undefined. Otherwise, CL returns the
                      NETBIOS name number.

                      This function is available only in DOS version 3.1
                      and later, and requires that the IBM PC Network or
                      Microsoft Networks program be running.