Int 6A Fn 0002  U - Super-tcp DOS Tsr Kernel V3.57 - ???                   [N]

   AX = 0002h
   BX = ??? (zero/nonzero)
   CX = ??? identifier (see AX=0004h)
   DS:SI -> 40-byte buffer for ??? or 0000h:0000h
   ES:DI -> buffer for ??? or 0000h:0000h

Return: AX = 0000h (successful) ???
   BL = ???
   BH = ???
   CX = ???
   DX = ???