INT 21 - DOS 3.1+ network - GET MACHINE NAME                                    
	AX = 5E00h
	DS:DX -> 16-byte buffer for ASCII machine name
Return: CF clear if successful
	    CH = validity
		00h name invalid
		nonzero valid
		    CL = NetBIOSOne of a number of low-level device-independent network interfaces; the other major interfaces are Novell's IPX and the Internet's IP (Internet Protocol, the lower-level portion of TCP/IP). number for machine name
		    DS:DX buffer filled with blank-paded name
	CF set on error
	    AX = error code (01h) (see #01680 at AH=59h)
Note:	supported by OS/2 v1.3+ compatibility box, PC-NFS
SeeAlso: AX=5E01h