Int 14 Fn 07  - Telapi - Write???                                          [N]

   AH = 07h
   CX = number of characters to write???
   DX = port number
   ES:DI -> buffer containing data???

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

Note:  under Novell TELAPI.EXE v4.01, this function and AH=06h are implemented
     with identical code

See Also: AH=06h"TelAPI",AH=E0h"TelAPI"