Int 14 Fn 02  - Connection Manager - Receive Character                     [N]

   AH = 02h
   DX = FFFFh
   BH = character to send

Return: AH = return code (00h-02h,04h,FFh) (see AH=00h/DX=FFFFh)
   BH = line status (see AH=03h)
   AL = received character (if any)

Notes: if DX is 0-3 on entry, Connection Manager emulates the standard BIOS
     function, but redirects the port over the network; if DX is any other
     value, the call is chained
   this function is provided primarily for compatibility; AH=07h/DX=FFFFh
     is the preferred function because it provides better performance

See Also: AH=02h/DX=FFFFh,AH=03h/DX=FFFFh,AH=06h/DX=FFFFh