Compatibility: 3.1+
Expects: AX    5e00H
DS:DX address of 16-byte buffer to receive ASCIIZ  node name
                                                                  
Returns: AX    error code if CF is set to CY
CH    00H  = network name not valid
else = upper byte of network ID
CL    (if CH not 0) network ID number of local computer
                                                                  
Info: Obtains the network name and NETBIOS ID number of the local
computer.

The buffer at DS:DX is filled with a 15-character, space-padded
string, followed by a terminating byte of 00H.

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DOS Fn 5e00H: Query Network Node Name