INT 7C - SK-UPPS Data Link Interface API(Application Program[ming] Interface) The defined set of calls which a program may make to interact with or request services of the operating system or environment under which it is running.  Because the inputs and outputs of the calls are well-defined, a program using the API can continue using the identical calls even if the internal organization of the program providing the API changes. - TRANSMIT FRAME
	AX = 0006h
	ES:BX -> Mbuf (see #03847)
Return: nothing
Notes:	The DLI will send LENGTH bytes found in the Mbuf's DATA area starting
	  at OFFSET. A complete and valid frame must be stored there. The DLI
	  will only copy the current node address (see AX=0003h) to the
	  source node field of the frame's MAC header.
	On Ethernet, the DLI will always send a minimum of 60 bytes, regardless
	  of the value found in the LENGTH field.
	This function returns immediately; the DLI will call the protocol's
	  Transmit Upcall (see #03848) when the frame has been sent.
	The Mbuf's IN USE field will be non-zero until the DLI calls the
	  Transmit Upcall.
SeeAlso: AX=0002h,AX=0004h,AX=0013h


(Table 03848)
Values SK-UPPS Transmit Upcall is called with:
	ES:BX -> Mbuf (NEXT field destroyed)
	interrupts disabled
Note:	On FDDI the bytes of the source and destination node fields in the MAC
	  header have been bit-swapped to physical address format.