The light gun had a sensor. When it was pointed at something on the display, it would trigger at the time the item was redrawn, indicating to the system which i

The light gun had a sensor. When it was pointed at something on the display, it would trigger at the time the item was redrawn, indicating to the system which item was detected. Details: http://ed-thelen.org/comp-hist/CasteelSageRecollections.html#LightGun http://ed-thelen.org/comp-hist/CasteelSageRecollections.html...