Int 14 Fn 8025  - Articom - Set Internal Send/receive Vector               [S]

   AX = 8025h
   DS:DX -> address of trap function (see below) to call on read/write

Note:  setting the vector to a user function allows the redirector's activity
     to be monitored.

See Also: AX=8000h,AX=8035h,INT 21/AH=25h

Trap function called with:
   AH = operation
       80h reading character
       81h writing character
   AL = character

   Return: AX must be preserved
       far JUMP to old trap function (see AX=8035h)