Yesterday I have tested a selfmade program on my 92. It deactivates all auto-interrupts (1-7). After connecting my calc to the viewscreen of my teacher, I realized, that although no auto-int was active, screen data was sent to the viewscreen. How is that possible? Does the 92 only send the screendata, when the viewscreen is attached to the calc? Or is this a never ending process? Klaus Lukaschek lukas1@xpoint.at