INT 14 - ARTICOM - SET INTERNAL SEND/RECEIVE VECTOR                             
	AX = 8025h
	DS:DX -> address of trap function (see #00366) to call on read/write
Return: nothing
Note:	setting the vector to a user function allows the redirector's activity
	  to be monitored.
SeeAlso: AX=8000h,AX=8035h,INT 21/AH=25h


(Table 00366)
Values ARTICOM trap function is 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)