Int 16 Fn FFA3 U - PC Tools V7-8 Datamon, V9+ Dprotect - Installation Ch [y] AX = FFA3h BX = 0000h CX = 0000h Return: AX = segment of resident code BX = 5555h CX = 5555h See Also: INT 21/AH=3Fh"NB.SYS",INT 21/AX=4101h