INT 62 - BW-TCP - HARDWARE DRIVER (ETHDEV.SYS) - API
        AH = function
            00h get physical hardware address
                DS:DX -> 6-byte buffer for address
                Return: AX = length of hardware address???
            01h NOP for ETHDEV.ODI
            02h initialize
            03h get real IP address
                DS:SI -> DWORD buffer for IP address
            04h set ???
                BX = ???
                ES:SI -> FAR routine for ???
            05h ???
            06h ???
            07h ???
                DS:SI -> ???
            08h ???
                CX = ???
                ES:SI -> func08 buffer
            09h hook timer interrupt
                Return: AX = handler ID if successful
            0Ah unhook timer interrupt
                DX = handler ID
            0Bh add ???
                AL = ???
                DX = ???
                BP = ???
                ES:SI -> ???
            0Ch remove ???
                DX = ???
                BP = ???
            0Dh NOP for ETHDEV.ODI
            0Eh begin critical section
            0Fh end critical section
            10h query critical section
                Return: CF clear if no critical section active
                        CF set if in critical section
            11h set ???
                ES:SI -> ???
                Return: CF clear
            12h get ?
                Return: AX = ??? (memory variable incremented after reading)
            13h ???
                CX = ???
                Return: AL = 00h if CF clear
            14h ???
                ES:SI -> ???
                Return: AL = 00h if CF clear
            15h get ??? (call after reading ETHDEV27 device)
                Return: AX = ??? (destroyed???)
            16h ???
            17h ???
                DX = segment of ???
                Return: Cf clear
            18h allocate and map EMS for driver
                Note: calls function 17h after EMS allocated and mapped
            FEh map EMS
                00h map in driver's memory
                01h map out driver's memory
Return: CF clear if successful
        CF set on error
            AL = error code
Note:   the Beame&Whiteside TCP/IP protocol stack uses two consecutive
          interrupts (62h and 63h by default); the BW-NFS client uses a third
          consecutive interrupt (64h by default) if it is loaded
SeeAlso: AH=FEh,INT 21/AH=3Fh"BW-TCP",INT 63"BW-TCP",INT 64"BW-NFS"

Format of func08 buffer:
Offset  Size    Description
 00h  6 BYTEs   hardware address???
 06h  6 BYTEs   ???
 0Ch    WORD    ???
 0Eh    WORD    ???

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