Hi Rob, What hardware or emulator did you develop this on? I ask, as I've just given it a quick go with AppleWin (1.19.3), but the AppleII locks up after moving the mouse a bit, having left a trail of inverse "L"s on the screen. My config is: - Enhanced //e, with 128K - Slot4 = mouse card - Slot7 = HDD with .2mg.zip (or the unzipped .2mg) image Tom