Int 14 Fn E3  - Telapi - Buffered Write                                    [N]

   AH = E3h
   BX = connection ID
   CX = length of buffer in bytes
   ES:SI -> buffer containing data

Return: AX = number of characters actually written??? (negative on error)

See Also: AH=07h"TelAPI",AH=E6h,AX=FF00h,INT 6B/AH=00h