Function 40h    Read/Modify Profiles			(Convertible) 
entry   AH      40h 
	AL      00h     read system profile in CX,BX 
		01h     write system profile from CX, BX 
		02h     read internal modem profile in BX 
		03h     write internal modem profile from BX 
	BX      profile info 
return  BX      internal modem profile (from 02h) 
	CX,BX   system profile (from 00h)