Int 21 Fn A1 - Attachmate Extra - Set 3270 Display State [I] AH = A1h AL = set status byte bit 7 : 0=windowed, 1=enlarged bits 6-3: current screen profile number 0-9 bits 2-0: active window number 0=PC, 1-4=host B-E, 5-6=notepad F-G See Also: AH=A0h,AH=A2h