Int 14 Fn 01  - Connection Manager - Send Character                        [N]

   AH = 01h
   DX = FFFFh
   BH = character to send

Return: AH = return code (00h-02h,06h) (see #0229)

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=06h/DX=FFFFh
     is the preferred function because it provides better performance

See Also: AH=02h/DX=FFFFh,AH=06h/DX=FFFFh,AH=09h/DX=FFFFh